Answer:
8 metal are there in modern periodic table
Self registering thermometers:
record only the maximum and minimum temperatures they are exposed to
record only the minimum temperature they are exposed to
record only the average temperature they are exposed to
record only the maximum temperature they are exposed to
Answer:
record only the maximum and minimum temperatures they are exposed to
Answer:
ur answer would be (A)
Explanation:
When you stand on a bathroom scale, what force or forces are acting on you?
A) normal force only
B) gravitational force only
C) gravitational and normal forces
Answer:
B
Explanation:
Lets see here, Gravity is pulling you down but your body is repelling to gravity. Meaning that gravity is pulling down your weight and the scale is reading it.
Hope this helped!
If predators A and B prey upon the same species and predator A is eliminated, the population of predator B will likely __________. a. be eliminated b. increase c. decrease d. remain the same Please select the best answer from the choices provided A B C D
Answer: B. Increase because there will be more resources for the remaining predators
Answer: B
Explanation: YES
Need help!!! Also don't joke around please
A spring running horizontally has areas with the coils closer together and areas with them farther apart. A label A points to areas where they are closer together. A label B points to areas where they are farther apart. A label C sits near a bracket connecting the center of two successive areas with the coils farther apart, which are separated by an area of closer coils. Label the parts of the longitudinal wave. Compressions: Rarefactions: Wavelength:
Answer: A,B,C
Explanation:
Answer:
a
b
c
Explanation:
edge
1. You may "feel" cold when you touch certain kinds of matter because
What is and advantage of genetic engineering
According to the kinetic theory of gases and Gay Lussac's Law, which of the following statements is incorrect?
A. The pressure of a gas results from collisions between the gas particles and the walls of the
container.
B. The average kinetic energy of the particles in a gas is inversely proportional to the
temperature of the gas.
C. Collisions between gas particles in the container are inelastic, but particle collisions with the
walls of the container are elastic.
D. During perfectly elastic collisions, no energy is lost due to friction.
E. As heat is added to a gas, the number of particle collisions increases and the pressure decreases.
Answer:B C E
Explanation:
Answer:
BCE
Explanation:
I got it right
Hope it helps
Will give brain!!!
Need images of structures of all alkanes and alkenes
Answer:
hope it help
Explanation:
Answer:
hope this help
Explanation:
Can u please answer if you know.
Answer:
plants
Explanation:
they are plant cells, happy Thanksgiving :)
Answer: photosynthetic tissues
Explanation: Chloroplasts are present in the cells of all green tissues of plants and algae. Chloroplasts are also found in photosynthetic tissues that do not appear green, such as the brown blades of giant kelp or the red leaves of certain plants.
How does the atomic radius increase?
Answer:
increases as you move down a group as the number of electrons increases. Therefore, the atomic radius increases as the group and energy levels increase
Explanation:
what do I write? Please hurry
Answer:
I'd say Water
Explanation:
The plant absorbs more water through the roots not sure if i'm correct.
HEY GUYS, PLEASE HELP ME IM PAST THE DUE… ILL MARK YOU BRAINLIEST TOO - THANKYOU
Answer:
C
E
Explanation:
Plzzz help i need the answer now
Answer:
Explanation:5,2 methyle- dhexene
Question The compounds 2-butanol and 2-butene both contain (1) double bonds, only (3) carbon atoms (2) single bonds, only (4) oxygen atoms Answer · 6 votes The answer is (3) carbon atoms. For 2-butanol, it contains single bonds only and with C, O, ... Mor
Answer:
carbon atoms
Explanation:
Let us look at the molecular formulas of each compound;
Butanol= C4H10O
Butene= C4H8
We can clearly see that the both compounds contains four carbon atoms each. Hence the correct answer is that the both compounds contain the same number of carbon atoms
can someone please answer this? there’s two answers and it’s due in 10 minutes
Which variables does equilibrium depend on?
a. Mass
b. Temperature
c. Pressure
d.Volume
Answer:
I believe tempurature, though i'm not sure. Give it a shot and tell me what you got!
how many atoms are present in 9.8g of H2SO4
Answer:
Explanation:
98 gH
2
SO
4
contains1 mole of H
2
SO
4
.
1 mole of H
2
SO
4
contain=1 mole of sulphur atoms.
∴9.8 g of H
2
SO
4
contain =0.1 mol of sulphur atom.
Thus, number of sulphur-atoms =n×N
A
(in 9.8 g of H
2
SO
4
)
=0.1×6.023×10
23
=0.6023×10
23
.
Few terrestrial animals can survive in the Arctic region. Most of them need a thick coat of fur or fat to survive. Based on this information, which factor seems to primarily affect animals life in this biome?
A. Rainfall
B. Salinity
C. Soil depth
D. Sunlight
E. Temperature
arrange this letters plss
1.tedsaturauntionsolu
2.ratedsatulutisoon
I will give u 15 points
Answer: 1 . Unsaturated Solution
2. Saturated Solution
Explanation:
1 ..tedsaturauntionsolu----------- Unsaturated Solution
2. ratedsatulutisoon--------------Saturated Solution
An Unsaturated solution is defined as a solution which contains an amount of solute that dissolves completely since the amount of solute is still less than the maximum amount that can readily dissolve in such solution and an additional amount of solute if added continues to dissove in the solution. Here the solution is still less than the equilibrium point.
example include. Addition of salt or sugar in water and it dissoves completely.
A saturated solution is defined as A solution which contains a maximum amount of solute that an additional solute will no longer be capable of being dissolved further since its equilibrium point has been reached.
Example- The addition of sugar to water till it no longer dissolves
Carbonated water is a saturated solution saturated with carbon as can be seen in the air bubbles it gives offf in form of carbon.
What is the atomic mass of bromine, given the atomic masses and percent abundance of the two isotopes are 78.92 amu (50.7%) and 80.92 amu (49.3%)?
Select one:
a. 79.9 amu
b. 78.9 amu
c. 80.9 amu
d. 35 amu
Answer:
79.9 amu
Explanation:
Given data:
Atomic mass of bromine = ?
Percent abundance of 1st isotope = 50.7%
Atomic mass of 1st isotope = 78.92 amu
Percent abundance of 2nd isotope = 49.3%
Atomic mass of 2nd isotope =80.92 amu
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (50.7×78.92)+(49.3×80.92) /100
Average atomic mass = 4001.24 + 3989.36 / 100
Average atomic mass = 7990.6 / 100
Average atomic mass = 79.9 amu.
if 42 grams of carbon in 52 grams of oxygen are used how many grams of CO2 will be produced. I need to show work.
C+ O2 --> CO2
Answer:
How many moles of oxygen gas are required to make 8.33 moles of carbon dioxide? ... be used to produce 1.99 grams of water. 1.99 mg H2O X. 1mol H2O. 18.0g X ... c. If the reaction produces 5.3 mg of carbon dioxide how many grams of water ... X. 25mol O2. 2mol C8H18. X. 32.0g O2. 1mol O2. = 4.80 x 103g O2. Answer ...
Explanation:
How does a lightning rod protect a
building from lightning damage?
Answer:
The lightning rod attracts lightning and is not connected to any other pieces of metal that may harm any electrical circuits.
Explanation:
I hope this helps, I tried my best to explain it quickly for you.
Answer/Explanation:
A lightning rod is a metal rod that is used to dislocate where lighting hits. Lightning is going to hit the closest point that it has been attracted too. So, the lightning rod was invented to attract lighting to something less potentially dangerous. Instead of hitting a building causing fires and collapsing, it takes the bolt so that nothing else has to.
An element containing a charge.
Answer:
That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge
Answer: The Charge of Elements
For example, sodium is an element with 11 protons within the nucleus and 11 electrons. Another example of an element is carbon, which has six protons within the nucleus and six electrons. In both cases, these elements have a neutral charge.
Explanation: That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.
5) If I have 20 liters of gas at a temperature of 67 °C and a pressure of 88.89 atm, what will
be the pressure of the gas if I raise the temperature to 94 °C and decrease the volume to 12
liters?
6) I have an unknown volume of gas at a pressure of 0.50 atm and a temperature of 325 K.
If I raise the pressure to 900 torr, decrease the temperature to 320 K, and measure the final
volume to be 48 liters, what was the initial volume of the gas?
7) If I have 21 liters of gas held at a pressure of 78 atm and a temperature of 800 K, what
will be the volume of the gas if I decrease the pressure to 45 atm and decrease the temperature
to 750 K?
8) If I have 3.9 L of gas at a pressure of 5.0 atm and a temperature of 50.0°C, what will be
the temperature of the gas if I decrease the volume of the gas to 2.4 L and decrease the
pressure to 303.0 kPa?
9) I have an unknown volume of gas held at a temperature of 115 K in a container with a
pressure of 60.0 atm. If by increasing the temperature to 225 K and decreasing the pressure to
30.0 atm causes the volume of the gas to be 25 liters, how many liters of gas did I start with?
work too pls !! thank you so much !!!
Answer:
Explanation:
We shall use gas law as follows
P₁ V₁ / T₁ = P₂ V₂ / T₂
5 ) V₁ = 20 , P₁ = 88.89 , T₁ = 273+ 67 = 340 K .
V₂ = 12 , P₂ = ? , T₂ = 273+ 94 = 367 K .
88.89 x 20 / 340 = P₂ x 12 / 367
P₂ = 159.9 atm .
6 )
V₁ = ? , P₁ = .5 , T₁ = 325 K .
V₂ = 48 , P₂ = 900/760 = 1.184 , T₂ = 320 K .
V₁ x .5 / 325 = 48 x 1.184 / 320
V₁ = 115.44 litres .
7 )
V₁ = 21 , P₁ = 78 , T₁ = 800 K .
V₂ = ? , P₂ =45 , T₂ = 750 K .
21 x 78 / 800 = V₂ x 45 / 750
V₂ = 34.125 litres .
8 )
V₁ = 3.9 , P₁ = 5 x 10⁵ Pa , T₁ = 323 K .
V₂ = 2.4 , P₂ =3.03 x 10⁵Pa , T₂ = ? .
3.9 x 5 x 10⁵ / 323 = 2.4 x 3.03 x10⁵ / T₂
T₂ = 120.45 K
= -152.54⁰C .
9 )
V₁ = ? , P₁ = 60 , T₁ = 115 K .
V₂ = 25 , P₂ =30 , T₂ = 225.
V₁ x 60 / 115 = 25 x 30 / 225
V₁ = 6.39 litre .
How many moles of oxygen are required for the combustion of 35.5 g of Magnesium Mg+O2-->MgO Please balance
Answer:
0.74 moles of oxygen are required for combustion
Explanation:
Given data:
Number of moles of oxygen required = ?
Mass of Mg = 35.5 g
Solution:
Chemical equation:
2Mg + O₂ → 2MgO
Number of moles of Mg:
Number of moles = mass/molar mass
Number of moles = 35.5 g/ 24 g/mol
Number of moles = 1.48 mol
Now we will compare the moles of Mg with oxygen.
Mg : O₂
2 : 1
1.48 : 1/2×1.48 = 0.74 mol
0.74 moles of oxygen are required for combustion.
What type of volcano will most likely form when an eruption takes place with explosive force and layers of ash accumulate? I WILL GIVE MANY POINTS!!!! PROMISE!
Cinder cone volcano
Composite volcano
Crater volcano
Shield volcano
Answer:
A.) A cinder cone vocano
Explanation:
Cinder cone volcanos give off more ash, rather then an explosion, hense the name "cinder cone".
Answer:
Cinder Cone Volcano
Explanation:
What are the lowest ratio of coefficients needed to balance the equation below? __ CaCl2 + __Al --> __AlCl3 + __Ca
What is the significance of the Schrödinger wave equation to the quantum mechanical model of
the atom?
Answer:
Quantum Mechanical Model of Atom
The solution of the wave equation brings the idea of shells, sub-shells and orbitals. The probability of finding an electron at a point within an atom is proportional to the |ψ|2 at that point, where ψ represents the wave-function of that electron.
I hope.it help you,
God blessed you.24. All elements found on the left side of the Periodic Table of
the Elements have what properties in common?
Answer:
have one delocalised electron
Explanation:
The elements which are present of left side of periodic table have similar chemical properties.
What is periodic table?Periodic table is a tabular arrangement of elements wherein elements are arranged according to their atomic numbers. It consists of seven horizontal rows called periods and eighteen vertical columns called groups .
Elements in the same group have similar chemical properties as they have same number of valence electrons. While, electrons in the same period have different valence electrons as electrons are added to same shell and hence have a little variation in chemical properties.
It is called periodic as properties repeat after an interval of certain electronic configuration. Elements are divided in four blocks depending on their properties.
Learn more about periodic table ,here:
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