Answers
Answer:
21.107
Explanation:
because this answer gives you 10 and also 90
Related Questions
Imagine that a researcher has developed a way to isolate thylakoids from chloroplasts and to make the ph of the thylakoid space acidic. If these isolated thylakoids are transferred to a ph8 solution in the dark, what might the researcher expect to observe?.
Answers
These isolated thylakoids are transferred to a ph8 solution in the dark, that the isolated thylakoids produce ATP.
Isolated thylakoidsThe chloroplasts are exposed to a hypotonic buffer devoid of sorbitol in order to achieve this. While stromal extract (SE) must also be isolated during this preparation if the cpSec1 or cpSRP pathways are to be studied, isolated thylakoids can be used to test any of the translocation pathways.
Can isolated thylakoids produce ATP?In the experiment that follows, it is possible to make thylakoid membranes that were isolated from chloroplasts produce ATP without the assistance of photosynthetic electron transport. Thylakoids are taken out of chloroplasts and suspended in a pH 4 buffer.
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1. Although ethanol is used recreationally in moderation, it is a poison that
becomes lethal when you consume 5 to 8 g of the compound per kg of body
mass, a fact that is not emphasized enough on college campuses, where students
have tragically died from accidental alcohol overdoses. If a 120. 0 lb student
drank an entire 1. 00 L bottle of whiskey (80 proof; 40% ethanol by volume),
how would their consumption compare to the median lethal dose (7. 0 g/kg)?
(1 lb = 453. 59 g; ethanol density = 0. 789 g/cm³) You must use dimensional
analysis
Answers
After ingesting 1 L of 80-proof whiskey, the student's consumption of ethanol would, after the application of dimensional analysis, be 5.798 g of ethanol per kilogram of the body.
First, we calculate the mass of ethanol ingested by the student by using dimensional analysis. To do that, we must calculate its volume, which we can do using the total volume (1 L = 1000 mL) and alcohol volume percentage (40% = 0.40). When we have the volume in hand, we can calculate the mass of ethanol using its density (0.789 g/cm³ = 0.789 g/mL).
m(EtOH) = V(EtOH) * d(EtOH) = 0.40 * V(total) * d(EtOH) = 0.40 * 1000 mL * 0.789 g/mL = 315.6 g
So the student would ingest 315.6 g of ethanol. We can now divide that mass by the student's mass to calculate their consumption.
1 lb = 453.59 g = 0.45359 kg
315.6 g / (120.0 * 0.45359 kg) = 5.798 g/kg
This is dangerously close to the median lethal dose and definitely above the lower threshold of 5 g/kg, so the student would definitely be in danger of overdosing.
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what is a solid with the following characteristic property:
a density of 0.56g/cm³
Answers
Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
Lithium , chemical symbol Li is the alkali group metal. lithium is the lightest solid element. lithium has melting point of 180.54 °C and having boiling point of 1342 °C. lithium belongs to group I(a) having valency 1. under normal condition , lithium is the least dense solid element having density 0.56 g/cm³ . lithium has several industrial uses like heat resistant glass lithium ion batteries , lithium is so light ,it can float on water.
Thus, Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
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Question 3 please
How many mL of … are required…
Answers
Strong and Weak Foundations Bases provide a similar problem: a strong base is one that is completely ionized in solution.
What is true for a strong base?Strong and Weak Foundations Bases provide a similar problem: a strong base is one that is completely ionized in solution. A weak base is one that is less than 100% ionized in solution.
Acids and bases are incompatible. Acids and bases will balance one another out. A solution's pH can be changed by acids but not by bases. While bases give hydrogen ions (H+), acids give hydroxide ions (OH-).
The aqueous solution of the salt formed by neutralisation of weak acid and strong base possesses basic nature, while aqueous solution of salt produced by neutralisation of weak base and strong acid possesses acidic nature.
The complete question is:
A strong base or salt in solution exist predominately as electrons in solution.
a) True
b) False
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What evidence might you need in order to explain the bands of different colors
Answers
Evidence might you need in order to explain the bands of different colors are because of electromagnetic radiations
The color of the light that correspond to the narrow wavelength band are the pure spectral colors
Here each different wavelength and frequency of visible light correspond to the different color so that spectrum appear as a band of color ranging from violet at the shorter wavelength and full spectrum of visible light travel through prism and wavelength separates into the colors of the rainbows because each colors has its own frequency and different wavelength and spectrophotometer is the important tool to study the colors of band
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Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate. What could Andrea have done wrong?
Group of answer choices
Written the data down in her notebook incorrectly
Not properly calibrated her instruments
She didn't do anything wrong; experiments do not always turn out the way we expect.
She could have made several random errors.
Answers
If Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate, then Andrea she didn't properly calibrate her instruments (Option b).
What are precision and accuracy?The term precision indicated that the measurement was correctly recorded in the experimental procedure, while accuracy refers to this measurement is factually correct. For example, when measuring temperature, it may be deviated from the correct temperature value due to failure of calibration in instrumentation.
Therefore, we can conclude that precision and accuracy are not identical and we can take precise measurements that are not accurate.
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Why does a solute depress the freezing point?
A) because the solute has bigger molecules than the solvent
B) because the solute disrupts crystal formation by the solvent
C) because the solute is colder than the solvent
D) because the solute tends to sink to the bottom of the solution
Answers
Answer: Option (B) is the correct answer.
Explanation: Freezing point depression is defined as the decrease in temperature of freezing of a solvent when a non-volatile solute is added into it.
This decrease in temperature arises because addition of solute particles into the solvent tend to disrupt the crystal formation of the solvents.
As a result, particles does not come closer to each other. Hence, we need to provide more lower temperature due to which there will be formation of crystal lattice in order to form the solid.
Thus, we can conclude that a solute depress the freezing point because the solute disrupts crystal formation by the solvent.
N a p h, f a d h, and h 2 o enter the electron transport chain. o 2 and 32 a t p exit the electron transport chain. which change will correct this model of the electron transport chain? switch naph and 32 atp. switch fadh and 32 atp. switch h2o and o2. switch naph and o2.
Answers
The change will correctly effect the model of the electron transport system above simply is to switch H₂O and O₂ ( Water and oxygen ).
The correct answer choice is option c.
Switching water and oxygen molecules to effect a change where NAPH, FADH, and H₂O enter the electron transport chain.It happens that oxygen react with 2 different electrons from the transport chain and 2 hydrogen in order to produce water molecules in the process.
Electron transport chain simply refers to a protein complex redox reactions which result in the production of ATP molecules. In this whole process of forming ATP, the electrons in the chain carried by the NADH, FADH2 and H+· are transferred to oxygen atom.
In conclusion, for an effective change to occur in the above electron transport system, there needs to be a switch of water and oxygen molecules
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Answer :Switch H2O and O2.
Explanation: edgenuie 2022-23
Which items are fuel for physical activity.
Select 2 correct answer(s)
options:
A)Specialized sports drinks
B)Food Intake
C)Supplementation
D)Water Intake
Answers
water intake
Answer:
Water Intake,Food Intake
Explanation:
What mass in grams of ammonia can be made from 340 g of H₂?
Answers
The balanced equation for ammonia formation is:
N2 + 3H2 ---> 2NH3
First we need to figure out how many moles of hydrogen, 340 grams nets us. We can do this by dividing 340 by the molar mass of diatomic hydrogen (2.016 grams/mole). This will get us 168.651 moles.
From the chemical formula, we see that it takes 3 moles of hydrogen to produce 2 moles of ammonia. So, if we multiply the moles of hydrogen by (2/3), we can find the moles of ammonia produced.
168.651 x (2/3) = 112.43 moles of ammonia
To convert this into grams, we multiply this number with the molar mass of ammonia (which is 17.031 grams/mole)
112.43 x 17.031 = 1914.8 grams of ammonia. Or if you want to account for significant figures, 1900 grams of ammonia.
An object travels at 65 mph west for 2 hours then changes direction and travels 50 mph east for three hours. Did this object accelerate?
Answers
No because it's travelling at a constant velocity in both scenarios and there's no particular direction in which the rate of change of velocity is changing.
What is the importance of subscripts when writing a chemical equation? (3 points)
Answers
The subscripts in a chemical equation shows the number of atoms of each element in a compound.
What is a chemical equation?A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.
Chemical equations involves molecular formulas of compounds that make up the reactant and products. The molecular formula is a notation indicating the number of atoms of each element present in a compound.
Subscript is a type of lettering form written lower than the things around it. The subscript shows the number of atoms of an element in a compound.
Examples of elements with evident subscripts are as follows:
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There are more white blood cells than red blood cells in the blood.
True or false
Answers
Answer:
it's false the correct answer will be There are more red blood cells than white blood cells in the blood
What happens in the process of beta decay?
Answers
Answer:
a neutron decays into a proton, an electron, and an antineutrino: n Æ p + e - +.
Explanation:
In beta plus decay, a proton decays into a neutron, a positron, and a neutrino: p Æ n + e+ +n. Both reactions occur because in different regions of the Chart of the Nuclides, one or the other will move the product closer to the region of stability. These particular reactions take place because conservation laws are obeyed. Electric charge conservation requires that if an electrically neutral neutron becomes a positively charged proton, an electrically negative particle (in this case, an electron) must also be produced. Similarly, conservation of lepton number requires that if a neutron (lepton number = 0) decays into a proton (lepton number = 0) and an electron (lepton number = 1), a particle with a lepton number of -1 (in this case an antineutrino) must also be produced. The leptons emitted in beta decay did not exist in the nucleus before the decay–they are created at the instant of the decay.
which of these sets of elements has similar properties? responses strontium, magnesium, calcium, beryllium strontium, magnesium, calcium, beryllium chromium, magnesium, iron, cobalt chromium, magnesium, iron, cobalt hydrogen, helium, neon hydrogen, helium, neon oxygen, nitrogen, carbon
Answers
PLS HELP, I DIDN'T KNOW THIS WAS DUE UNTIL I CHECKED-AND IM WORKING ON MY OTHER 5 HOMEWORK ASSIGNMENTS, SO I DONT HAVE TIME TO DO THIS!!! I just need the answers you don't need to go into full detail! I'LL GIVE BRAINLIEST!!!
Answers
Proton has positive charge whereas neutron has no charge.
What are the difference between a proton and neutron?Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.
An atom that has lost one or more number of electrons is known as anion.
Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.
Electron is located outside the nucleus of an atom.
Fluorine is that atom which has 9 number of protons so its atomic number is 9.
Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.
There are three parts of an atom i.e. proton, electron and neutron.
The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters
Electron has negative charge, proton has positive charge and neutron has no charge.
Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.
The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.
The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.
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Using a reactivity series, show which reactions can occur: (YES or NO)
1. Na replaces K?
2. Co replaces Cu?
3. Zn replaces Zn2+?
4. Ni replaces Ba?
Answers
1. Na cannot replace K
2. Co will replace Cu
3. Zn cannot replace itself
4. Ni cannot replace Ba
Cation reactivity seriesThe reactivity series is a table showing how reactive elements. The reactiveness could be in descending or ascending order.
Reactivity series exist for both cations and anions.
In this case, we are dealing with cations. The reactivity series for cations is in the attached image.
The following can be observed from the table:
K is above NaCo is above CuBa is above NiAs a rule of thumb, cations at the lower part of the table cannot displace cations at the upper part during reactions.
Thus:
Na (sodium) cannot replace K (potassium)Co (cobalt) will replace Cu (copper)Zn cannot replace itself. Zn and Zn2+ are the same.Ni cannot replace Ba.More on the reactivity series can be found here: https://brainly.com/question/14652325
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in your experiment, you found a height difference () of 155.2 mm of hg at 22 oc. at that temperature, the vapor pressure of water is 19.8 mm hg. if the barometric pressure in the lab was 789 mm hg, what is the pressure of h2 in the buret (in mm hg)? note: do not include the units in your answer.
Answers
However, if it is heated to impregnated vapor, volume and work (1W2) will determine the final temperature. result (a) Indicate that the lift pressure should be 400 kPa, using v = V/ m = 0.1 m3/kg
Standard sets of circumstances for experimental measures to be produced at standard temperatures and pressures (STP) enable comparisons to be made between various sets of data. The most commonly used standards are those of the National Institute of Standards and Technology (NIST) and the International Union of Pure and Applied Chemistry (IUPAC), albeit these standards are not generally acknowledged. Different essential delineations for other associations' standard reference circumstances have been established.
In chemistry, IUPAC changed its description of standard temperature and pressure in 1982
Temperature and Pressure
Until 1982, STP was defined as a temperature of273.15 K( 0 °C, 32 °F) and an absolute pressure of exactly 1 atm(101.325 kPa).
Since 1982, STP has been defined as a temperature of273.15 K( 0 °C, 32 °F) and an absolute pressure of exactly 105 Pa( 100 kPa, 1 bar).
STP shouldn't be confused with the standard state generally used in thermodynamic evaluations of the Gibbs energy of a response.
NIST uses a temperature of 20 °C(293.15 K, 68 °F) and an absolute pressure of 1 atm(14.696 psi,101.325 kPa). This standard is also called normal temperature and pressure( shortened as NTP). still, a common temperature and pressure in use by NIST for thermodynamic trials is298.15 K( 25 °C, 77 °F) and 1 bar(14.5038 psi, 100 kPa). NIST also uses" 15 °C( 60 °F)" for the temperature compensation of refined petroleum products, despite noting that these two values aren't exactly harmonious with each other.
The International Standard Metric Conditions for natural gas and analogous fluids are288.15 K(15.00 °C;59.0.
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3. Explain why it was significant that large numbers of other frogs and toads became extinct at the same time the golden toads disappeared.
Answers
This opens an opportunity for scientists to observe the region where the frogs/toads lived or the time period when they lived, to determine what phenomena is causing them to go extinct.
Perhaps an invasive species drove the creatures to extinction, or the competition for resources became too great, causing them to suffer.
Weather changes could have hindered them, like a drought or forest fire.
They also could have contracted a virus, but these are things that would have to be influenced by other factors and would have to be studied by scientists.
These are just possible explanations for why the frogs and toads might have gone extinct when the golden toads disappeared
At a fixed temperature and pressure, the volume occupied by a gas is _____ proportional to the number of moles of gas present. For ideal gases under these conditions, equal _____ of gas contain equal numbers of particles or moles.
Answers
Answer:
that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
Which statement describes the relationship of resistance and current?
Resistance is directly proportional to current because R = V over I..
Resistance is inversely proportional to current because R = .
Resistance is directly proportional to current because R = VI.
Resistance is inversely proportional to current because R = VI.
Answers
Resistance is inversely proportional to current because R = VI. Option D.
If you increase the applied voltage and don't change the resistance, the current will also increase. The higher the resistance the more strongly the electron interacts with the resistance, slowing it down. Electrons repel each other, so even if more electrons pass through the resistor this cannot be counteracted.
As resistance increases current decreases and all other factors remain constant. Materials with low resistance, such as metals, are called electrical conductors and allow current to flow easily. High-resistance materials such as plastics are called electrical insulators. Current is inversely proportional to resistance. If I fix the voltage across a variable resistor the current that flows is inversely proportional to the resistance.
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Answer:
B) Resistance is inversely proportional to current because R = V/I
Explanation:
Why are sodium (Na) and potassium (K) in the same group on the periodic table?
A They are both hard and brittle.
B They have similar reactivity.
C They are both colorless.
D They have similar atomic weights.
Answers
Sodium (Na) and potassium (K) in the same group on the periodic table because of option B They have similar reactivity.
The periodic table, also called the periodic table of the factors, is a tabular show of the chemical elements. it is broadly used in chemistry, physics, and other sciences, and is typically visible as an icon of chemistry.
Lithium, sodium, and potassium have the same wide variety of valence electrons i.e. 1, for this reason, they belong to the same organization. The institution is referred to as the alkali metals group because these kinds of elements shape oxides that dissolve in water to form alkali.
Potassium is observed clearly in lots of meals and as a complement. Its major position within the body is to assist maintain ordinary levels of fluid inside our cells. Sodium, its counterpart, keeps regular fluid ranges outdoors of cells. Potassium also helps muscles to settle and supports normal blood pressure.
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Which of the following statements are correct?
Magnesium chloride and magnesium sulfate are ionic compounds.
Methane and carbon dioxide are ionic compounds
An ion that gains an electron has a positive charge.
Ionic compounds have higher melting and boiling points than covalent compounds.
Answers
(1) Magnesium chloride and Magnesium Sulfate are Ionic compounds.
(4)Ionic compounds have higher melting and boiling points than covalent compounds
Explanation for each point :
(1) MgCl and MgSO4 are iconic compounds because they exist as solids due to strong electrostatic forces of attraction and are soluble in polar solvents.
The bond formed here is electrovalent(or ionic bond).
(2) Methane and Carbon dioxide are NOT ionic compounds .
•They are Covalent compounds
•In methane , CH4 , carbon is attached to four hydrogen atoms as Central atom C has 8 valence electrons.
•In carbon dioxide , CO2 it is a polar covalent bond and central atom C gas 8 valence electrons.
(3)An ion that gains an electron has a NEGATIVE charge not positive charge.
When an electron loses an electron it will have a positive charge , this process is known as Ionization.
(4) Ionic compounds have higher melting and boiling points than covalent compounds because the bonds in ionic compounds have high forces of electrostatic and hence also requires high energy to break .
———————
What are Ionic Compounds(Ionic bond)?
•If the two oppositely charged ions have strong electrostatic forces of attraction then a Ionic bond is formed.
•This formation is a redox process.
•These are good electrical conductors in molten state.
What are Covalent bonds/compounds?
•If the bond is formed between two atoms by mutual sharing of the outer most electrons then it’s known as covalent bond.
•Polar covalent bond are formed when two dissimilar electro negative atoms have mutual sharing of electron pairs.
•These have low melting and low boiling points
•These are not electrical conductors as they don’t have free electrons in them.
According to the Law of Conservation of Matter, what happens to atoms during a chemical reaction?
1. More atoms are produced to form new substances.
2. Nothing; they stay the same.
3. The atoms are rearranged to form new substances.
4. Atoms are converted into energy during the chemical reaction.
Answers
Answer: 3. The atoms are rearranged to form new substances.
According to law of conservation of matter, atoms are rearranged to form new substances in a chemical reaction.
What is law of conservation of matter?According to law of conservation of matter, it is evident that matter can be neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of matter and energy are related as matter possesses mass and mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of matter is widely used in field of chemistry and fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of matter and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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How do heat waves form
Answers
Answer:
Heat waves can form when a high-pressure system moves into a region and stalls. The system can force warm air downward, acting like a cap as it keeps the cool air near the surface from rising, according to AccuWeather. What qualifies as a heat wave can vary greatly from region to region.
A car was purchased in 2010 for $20,000. The car is depreciating by 15% each year. How much would the car be worth in 2020? What value do you use for T
Answers
The value of a car that was purchased in 2010 for $20,000 which is depreciating in value by 15% each year is $3937.49.
What will be the value of the car after 10 years if it depreciates by 15% every year?The value of the car will be found using the exponential decay model.
The formula of the exponential decay model is given as follows:
y = a (1 - r)ˣ
where;
y = the amount remaining
a = initial amount
r = decay rate
x = time period of decay
In the question above, a car was bought for $20000 in 2010.
The value of the car decays exponentially at a rate of 15% each year.
The time period between 2010 and 2020 is 10 years.
Considering the data given about the car:
a = $20000
r = 15% or 0.15
x = 10
Substituting the values in the decay formula:
y = 20000 (1 - 0.15)¹⁰
y = 20000 (0.85)¹⁰
y = $3937.49
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Question 1:
Moles - If a solution contains 0.02 g of Thiamine (vitamin B1) and has the molecular formula
C12H17N4OS
How many moles are present in the solution?
Answers
Explanation:
mole=mass/molar mass
molar mass of c12H17N4OS
12×12+17+14×4+16+32
=265
molar mass=265
mole=0.02/265
HELP BRIANLIEST AND 30 POINTS
If the density of an object is greater than 1 g/ml, what does that mean?
Group of answer choices
The object is heavier than gold
The object will float in water
The object will either sink or float in water depending on its size
The object will sink in water
Answers
If the density of an object is greater than 1 g/mL, the object will sink in water (option D).
What is density?Density of a substance can be defined as the measure of the mass of matter in the substance contained by a unit volume.
The density of a substance is a determinant of whether or not the substance will float or sink in a liquid substance like water.
This means that an object will float in water if it has a density less than water but will sink if it has a density higher than water.
Since the density of water is 1g/mL, therefore, an object with density greater than 1g/mL will sink in water.
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How to assure our bottled water is free of Calcium,
Magnesium and Lead ions.
Answers
Answer:
t can be removed by using a water softener
Explanation:
as you climb to the top of a hypothetical mountain in florida, air pressure decreases from 1 atm to 0.75 atm at the peak. what will the partial pressure of oxygen be at the top of the mountain?
Answers
As you climb to the top of a academic mountain in florida, air pressure decreases from 1 atm to0.75 atm at the peak. what will the partial pressure of oxygen be at the top of the mountain.
Pressure
Pressure( symbol p or P) is the force applied vertical to the face of an object per unit area over which that force is distributed.
Colorful units are used to express pressure. Some of these decide from a unit of force divided by a unit of area; the SI unit of pressure, the pascal( Pa), for illustration, is one newton per forecourt metre( N/ m2); also, the pound- force per forecourt inch( psi) is the traditional unit of pressure in the Homeric and U.S. customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere( atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units similar as the centimeter of water, millimeter of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.
Pressure is the quantum of force applied vertical to the face of an object per unit area. The symbol for it's" p" or P.( 2) The IUPAC recommendation for pressure is a lower- case p.( 3) still, upper- case P is extensively used. The operation of P vs p depends upon the field in which one is working, on the near presence of other symbols for amounts similar as power and instigation, and on writing style.
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