Answer: Clouds need two things to form: cool air and particles on which water vapor can condense. Clouds form as air cools. Cold air cannot hold as much water vapor, so the water vapor condenses. Water vapor condenses on small particles in the atmosphere, such as smoke, salt, and dust. As a result, clouds form.
Explanation: correct on edge
what is the formula to find the volume of a marble
Individual marble:
4/3_?_ R^3Answer:
Individual Marble
Use the formula 4/3_?_ R^3, to solve for the volume. Here, R is the radius, or half of D. ^3 means the radius is cubed.
Explanation:
smoking cigarettes is banned in petrol stations because of the risk of explosions.
Explain why Flames can cause explosions in petrol stations even if they never come into direct contact with any liquid petrol.
help pls!
Answer:
well it is because of mainly what we call reaction the petrol are highly reactive with the flames
This is an impossible formula. If it were real, determine the molar mass of:
Cr4(PO4)3
Answer:
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
Explanation:
First, collect the individual molar masses of each element. These values are found on the periodic table under each respective element.
Chromium (Cr): 51.996 g/mol
Phosphorus (P): 30.974 g/mol
Oxygen (O): 15.999 g/mol
The quantity of each element is determined by the subscript next to it. If their is a subscript directly to the right of a set of parentheses, multiply each element within the parentheses by the subscript.
Chromium (Cr): 4
Phosphorus (P): 1 x 3 = 3
Oxygen (O): 4 x 3 = 12
Finally, the total molar mass of the compound is the collective molar masses of each element times the quantity of each element.
Molar Mass (Cr₄(PO₄)₃): 4(51.996 g/mol) + 3(30.974 g/mol) + 12(15.999 g/mol)
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
4Na(s)=+O2(g)->2NA2)(s)
How many grams of Na2O is produced when 57.5g an Na reacts
How old is a piece of cotton cloth if the half-life of carbon-14 is 5,730 years, and the carbon-14 composition of the cloth is 22 percent that of living plants?
Question 1 options:
A)
1,813 years
B)
1.21 × 10-4 years
C)
12,517 years
D)
1.21 × 10-4 years-1
The half-life is the time used by the concentration to get half of its initial value. The cotton cloth is 5097 years old.
What is radioactive decay?Radioactive decay is the reduction of the initial concentration to the half value. The exponential decay can be given as:
[tex]\rm N(t) = N_{0}e ^{-\lamda t}[/tex]
The decay constant is calculated as:
[tex]\begin{aligned} \lamda &= \rm \dfrac {ln (2)}{t\frac{1}{2}}\\\\&= \dfrac{\rm ln(2)} {5730}\\\\&= 0.0001209\end{aligned}[/tex]
Solving further:
[tex]\begin{aligned}0.22 &= \rm e^{-0.0001209 \times t}\\\\\rm ln 0.22 &= -0.0001209 \times t\\\\\rm t &= \rm \dfrac{log 0.22}{-0.0001209}\\\\&= 5097 \;\rm years\end{aligned}[/tex]
Therefore, the cotton cloth is 5097 years.
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Name the following carboxylic acid:
COOH
A. 3-ethyl-2-methylheptanoic acid
B. 2-ethyl-1-methylhexanoic acid
The name of the compound is 2-methyl-3-ethylheptanoic acid.
Naming organic compoundsLooking at the structure, the longest carbon chain is 7. Meaning that the compound is a heptanoic acid.
There are 2 branches. The first one has a single carbon (methyl) while the second one has 2 carbons (ethyl).
The methyl is located on the second carbon (2-methyl) while the ethyl is located on the third carbon (3-ethyl) on the main chain.
Thus, the name of the compound would be 2-methyl-3-ethylheptanoic acid.
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Answer:its c 3-ehtyl
Explanation:
How many significant figures
are in this number?
0.00521
The significant figures in the number 0.00521 is : 3 Significant figures.
Meaning of significant figuresSignificant figure can be defined as numbers within the number system that has value or gives value to a number list.
Significant figures are numbers that has a measure of value assigned to them as a reason of where they are placed.
In conclusion, the number above contains only three significant figures.
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-
Solution 1: 0.1 M - Dim Light Solution 2: 0.1M - Bright
Bulb
Which solution from the data table most likely contains a strong acid?
A. Solution 1 is a strong acid due to a large number of dissociated ions.
B. Solution 1 is a strong acid due to a small number of dissociated ions.
C. Solution 2 is a strong acid due to a large number of dissociated ions.
D. Solution 2 is a strong acid due to a small number of dissociated ions.
Answer:
: The conductivity of electrolyte solutions: (a) 0.1 M NaCl (b) 0.05 M NaCl (c) 0.1 M HgCl2. An electrolyte solution conducts electricity because of the movement of ions in the solution (see above). The larger the concentration of ions, the better the solutions conducts. Weak electrolytes, such as HgCl2, conduct badly because they produce few ions when dissolved (low concentration of ions) and exist mainly in the form of molecules.
Explanation:
A balloon contains 7.2 L of
He. The pressure is reduced
to 2.00 atm and the balloon
expands to occupy a volume
of 25.1 L. What was the initial
pressure exerted on the
balloon?
Given:
Unknown:
Formula:
Solution:
Final Answer:
Apply Boyles law
P1V1=P2V27.2(2)=25.1P214.4=25.1P_2P_2=0.57atmRemember
If Volume is four times increased pressure is 4 times decreased
# 12 of Equilibrium Constant
Consider the chemical system:
2 NO(g)
N₂(g) + O₂ (g)
K = 2.1 x 1030
How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?
Select one:
O a. They are much lower
O b. They are much higher
O c.
They are about the same order of magnitude
O d. They have to be exactly equal
e.
You can't tell from the information given
Answer:
of Equilibrium Constant
Consider the chemical system:
2 NO(g)
N₂(g) + O₂ (g)
K = 2.1 x 1030
How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?
Select one:
O a. They are much lower
O b. They are much higher
O c.
They are about the same order of magnitude
O d. They have to be exactly equal
e.
You can't tell from the information
Explanation:
of Equilibrium Constant
Consider the chemical system:
2 NO(g)
N₂(g) + O₂ (g)
K = 2.1 x 1030
How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?
Select one:
O a. They are much lower
O b. They are much higher
O c.
They are about the same order of magnitude
O d. They have to be exactly equal
e.
You can't tell from the information
Are cable wires made of thermoplastic? If so why?
(This is just a doubt that just came into my head)
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Cable wires are usually made of of thermoplastics because, current passing through the wire has heating effects as well, due to collision of electrons in the conducting wire. so to avoid the melting of normal wire which can break the circuit, Thermoplastics are used, that doesn't have much effect of heat on them.
Using the periodic table, which of the elements below would be a poor conductor of electricity, be a gas, and may have a color?
a. Zinc
b. Cobalt
c. Chlorine
d. Calcium
Which of the following indicates an endothermic reaction? I will mark as brainliest if correct.
Answer:
A + B → C + D + heat
Explanation:
A. A+B+heat⇒C+D
In an endothermic reaction, the system requires energy/heat, the enthalpy change is positive.
Complete the chart on the characteristics of bonds
Answer:
Face value. Corporate bonds normally have a par value of $1,000, but this amount can be much greater for government bonds.
Interest. ...
Coupon or interest rate. ...
Maturity. ...
Issuers. ...
Rating agencies. ...
Tools and tips.
In a spacecraft tge carbon dioxide exhaled by the astronaut can be removed by the reaction with lithium hydroxide, LiOH according to the following; CO2(g) + LiOH(g) = LiOH(s) + H2O(l) how many moles of Lithium hydroxide are required to react with 30 moles of CO2, average exhaled by each person
Answer:
30 moles
Explanation:
From the equation it is a one - to - one reaction
Calculate the molarity of 0.060 moles NaHCO3 in 1500. mL of solution
Answer:
= 0.4 M
Explanation:
data:
moles = 0.060 moles
volume = 1500 ml
= 1500 / 1000
= 1.5 dm^3
solution;
molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]
= 0.060 / 1.5
molarity = 0.4 M
How many liters of 4.000 M sodium bromide solution are needed to
make 0.250 L of 0.200 M sodium bromide?
Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this compound?
element symbol molar mass
A 15.45 g/mol
Q 20.05 g/mol
Z 41.62 g/mol
Answer:
AZ₂
Explanation:
The formed compound will not contain Q because mass percentages, %A and %B, form 100% of the compound.
Steps
Change % of each element into grams.Convert grams of each element into moles by dividing grams by molar mass.Divide all moles by the smallest number of moles.If the moles are all whole numbers, then you’re done and that’s your empirical formula.If not, multiply all moles by number such that everything is a whole number.Solving
We have 15.66g of A and 84.34g of ZMoles of A, n(A) = 15.66/15.45 = 1.01 molesMoles of Z, n(Z) = 84.34/41.62 = 2.02 molesA = 1.01/1.01 = 1 and Z = 2.02/1.01 = 2Therefore, the empirical formula is AZ₂Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium? oxygen lithium oxide right arrow. lithium lithium oxygen right arrow. lithium oxide oxygen lithium right arrow. lithium oxide lithium oxide right arrow. lithium oxygen
Answer:
lithium lithium (or 2lithium) + oxygen ->
Explanation:
Your welcome
Perform the following
mathematical operation, and
report the answer to the
correct number of significant
figures.
0.97584/5.68 = [?]
The answer to the correct number of significant figures is 0.171.
What are the significant numbers?The numbers 1 to 9 will always be significant figures. Leading zeros of a number are not significant figures. Zeros to the right of a number are significant figures.
In this case we have:
[tex]0.97584/5.68 = 0.171[/tex]
So you only need the three numbers after the dot.
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What is the boiling point of liquid c when the
Answer:
100 degree is the answer of given statement
Calculate the mass (in grams) of 3.85 x 1024 carbon atoms.
Round your answer to two decimal places.
Answer:
You can get to the answer in two steps:
calculate: 3.40⋅1022 atoms = x mol ?
using Avogadro's constant.
calculate: x mol = ? grams,
using the atomic mass of Helium.
Step 1
Avogadro's constant says that 1 mole of any atom contains 6.022⋅1023 atoms. In this case you have 3.40⋅1022 atoms:
3.40⋅1022atoms6.022⋅1023atomsmol = 5.65⋅10−2mol
Step 2
The atomic mass of helium (He) will give you the weight of one mole of this molecule: 1 mol = 4.00 gram:
4.00gmol⋅5.65⋅10−2mol = 0.226g
So the 3.40⋅1022 helium atoms weigh 0.226 gram.
Sugar (C12H22011) is a molecular substance. Which of the following properties would you expect it to
have?
a. conducts electricity in water
b. doesn't dissolve in water
c. held together by opposite charges
d. low melting point
A 3.24-gram sample of NaHCO3 was completely decomposed in an experiment.
2NaHCO3 → Na2CO3 + H2CO3
In this experiment, carbon dioxide and water vapors combine to form H2CO3. After decomposition, the Na2CO3 had a mass of 2.19 grams.
Determine the mass of the H2CO3 produced.
Calculate the percentage yield of H2CO3 for the reaction. Show your work or describe the calculation process in detail.
PLEASE HELP, WILL MARK BRAINLIEST!!!
Mass of H2CO3 = 1.05g
Givens: NaHCO3 = 3.24
Na2CO3 = 2.19
Mass of H2CO3 = mass of NaHCO3 - mass of Na2CO3
Mass of H2CO3 = 3.24g - 2.19g
Mass of H2CO3 = 1.05g
How do you find the mass number?The number of protons and the number of neutrons combine to determine the mass number of an element. Mass number = proton + neutron. If you want to calculate the number of neutrons an atom has, you can simply subtract the number of protons or atomic numbers from the mass number.
Divide the mass of a substance in grams by the molecular weight. This will give you the number of moles of the substance in a particular mass. For 12 g of water, (25 g) / (18.015 g / mol) = 0.666 mol.
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Describe the population density located along the tectonic plate boundary known as the Ring of Fire and the potential effect that earthquakes or volcanic
activity can have in this area.
(Pls no links)
Population density is the number of specific organisms living in a particular area. The tectonic plate movements in the Ring of Fire area can cause volcanic eruptions and earthquakes.
What are tectonic plates?Tectonic plates are the parts of the crust and the mantle of the earth layer that is also called the lithosphere plate. They are not stationary and have slight movements on the mantle which comprises the hot lava.
The movement of these tectonic plates in the area of the Ring of fire causes the eruption of the lava and disrupts the crust causing an earthquake. This consequence affects the life habiting them.
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Answer:
im pretty sure because the plates move which causes these natural disasters
Explanation:
Using the Equilibrium Solubility Constant
Some carbonate compounds have limited solubility.
MCO3(s) M²+ (aq) + CO3²- (aq)
The solubility constant Ksp for a carbonate compound MCO3, Ksp = 2.5E-7.
A saturated solution of the compound MCO3, is made.
Calculate the concentration of the ions M²+ (aq) and CO32-(aq) in the saturated solution (check the stoichiometry, the
ions will have the same concentration).
Give your answer to three significant figures, using the exponential format, example enter 0.0000382 as 3.82e-5
with no gaps and the -ve e if power is -ve.
Answer:
The solubility product constant (Ksp) describes the equilibrium between a solid and its constituent ions in a solution. The value of the constant identifies the degree to which the compound can dissociate in water. The higher the Ksp, the more soluble the compound is.
Answer:
MCO3(s) M2+(aq) + CO32-(aq) The solubility constant Ksp for a carbonate compound MCO3, Ksp = 2.83E-7. A saturated solution of the compound MCO3, is made.
Explanation:
You have an unknown compound of Potassium derivatives (KIxOy). This sample contains 17.0g of potassium, and 27.8g of oxygen and 55.2g of iodine. If you prepared another sample, but this time it had 460.0g of potassium periodate, how much oxygen and iodine would you have in your sample?
Answer:
The body temperatures in degrees Fahrenheit of a sample of adults in onle small town are 96.6 99.6 96. 3 97.3 99.8 97.7 97,6 97.9 99.2 Assume body temperatures of adults are normally distributed Based on this data find the 9900 confidence Interval of the mean body temperature of adults in the town Enter Your answer as an Open-interval (i.e. parentheses) accurate to 3 decimal places. Assume the data is from normally distributed population_ 9900 CI = Previewv Tp Enter 4euleie er using intewval notation. Example: [2,5) Uge U fcr unicr to combine interval:, Example: (-00,2] U [4,00} Entet each Faluce nunber (like 33,2.2172) Or 33 calculztion (like 5/3,243 5-4) Enter DNE for ar empty set, Use 00 to enter Infinity. Enter each valze accurate to decial place: Get Help: Points possible: 10 This attempt of 3 Me ye ingtmctor absutthis questin Poelis quesivto 6 EpIC e 6 DeA
Explanation:
(Unsure if this helped but hope it did!)
460 grams of Potassium periodate contains 128 grams of Oxygen and 253.9 grams of Iodine.
What is a compound?A compound is composed of atoms from two or more different elements chemically bonded together in fixed small whole number ratios to each other.
Mass of potassium= 17.0 grams
Mass of Oxygen= 27.8 grams
Mass of Iodine= 55.2 grams.
Mass of Potassium periodate= Mass of Potassium+Mass of Oxygen+Mass of Iodine
Mass of Potassium periodate= 17g+27.8g+55.2g
Mass of Potassium periodate= 100 grams
Therefore, 100 grams of Potassium periodate contains 27.8 grams of Oxygen
1 gram Potassium periodate contains 27.8/100= 0.278 grams of Oxygen
So, 1×460= 460 grams Potassium periodate contains 0.278×460
=128 grams Oxygen
Now,
100 grams of Potassium periodate contains 55.2 grams of Iodine
1 gram of Potassium periodate contains 55.2/100=0.552 grams of Iodine
1×460=460 grams Potassium periodate contains 0.552×460
=253.9 grams of Iodine.
So, 460 grams of Potassium periodate contains 128 grams of Oxygen and 253.9 grams of Iodine.
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When a solution is saturated, and additional solid solute is added, what happens?
Answer:
super saturation takes place.
Explain the relashionship between carbon dioxide, the human population and use of fossil fuels.
Answer:
More people means more demand for oil, gas, coal and other fuels mined or drilled from below the Earth's surface that, when burned, spew enough carbon dioxide (CO2) into the atmosphere to trap warm air inside like a greenhouse
Explanation:
hope this helps
pls mark brainliest
Lab: Plate Boundaries and Movement Lab Report.
A Plate Boundaries and Movement Lab Report is a report that shows the records of all the data relating to the movement of Plate Boundaries and their movements.
What are Plates in this context?A tectonic plate is also described or referred to as a Lithosperic Plate. In Geography, it is described as a slab of rock that is not shaped regularly.
In most cases, it comprises continental and oceanic lithosphere.
Why is it crucial to record the movement of plates and their boundaries?Plate Boundaries and their movement are largely linked to volcanic activities and earthquakes. This means that they can be used to predict when any of the above-mentioned events may happen.
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