CHEMISTRY HIGH SCHOOL

At the same temperature and pressure, 1.0 liter of CO(g) and 1.0 liter of CO2(g) haveA. equal masses and the same number of molecules
B. different masses and a different number of molecules
C. equal volumes and the same number of molecules
D. different volumes and a different number of molecules

Answers

Answer 1
Answer:

Answer is C - equal volumes and the same number of molecules.

Explanation;

Let's assume that CO and CO₂ are ideal gases. Then we can use ideal gas law, PV = nRT

Where, P is the pressure of the gas (Pa), V is the volume of the gas (m³), n is the number of moles of gas (mol), R is the universal gas constant ( 8.314 J mol⁻¹ K⁻¹) and T is temperature in Kelvin.

The temperature and the pressure of the both gases are same. Volume is also same as 1.0 L. R is a constant. So according to the formula, both gases have same number of moles. According to the Avogadro's constant, 1 mole has 6.022 x 10²³ particles.

number of molecules = Avogadro's constant x number of moles.

Hence, under the same conditions both gases have same number of molecules.

Answer 2
Answer: C is the correct answer. All gases have the same volume under the same conditions.. This is just their nature. And one liter of a gas has the same number of molecules of another gas

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The number with a higher value is the number of electrons, and the number with a lower value is the number of protons.

The number with a higher value is the mass, and the number with a lower value is the number of protons.

The number with a higher value is the number of protons, and the number with a lower value is the mass.

Answers

The answer is The number with a higher value is the mass, and the number with a lower value is the number of protons. 

The number with a higher value is the mass. This is because the mass number of the element is the sum of the number of protons and number of neutrons in the nucleus of the atom. On the other hand, the number with a lower value is the number of protons. The number of proton in the nucleus of the atom is the atomic number of the element. It involves only numbers of protons, thus, it has the lower value than the mass number.
For example, hydrogen has 1 proton and 1 neutron. Its atomic number is 1 (= number of protons). Its mass number is 2 (1 proton + 1 neutron = 2). Thus, mass number has higher value than the atomic number.

An example of an atom that has no charge is one that hasA. 1 proton, 2 electrons, and 3 neutrons.
B. 3 protons, 1 electron, and 3 neutrons.
C. 2 protons, 2 electrons, and 1 neutron.
D. 3 protons, 2 electrons, and 1 neutron.

Answers

For an atom to have no charge, that is neutral, the number of electrons should be the same to the number of electrons. If the number of electron is more than the number of proton, the atom is negatively charged. Also, when the number of proton is more than the number of electron, the atom is positively charged. The answer to this item is letter C.
An atom consists of a postively charged nucleus that is surrounded by a negatively charged cloud of electrons . The nucleus consists of positvely charged protons and charge-neutral neutrons. An example of an atom that has no net charge is one that has two protons, two electrons and one neutron (Answer C).

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Answers

It will be:

b. Alkyne* series

* You have done a spelling mistake here. It will be "Alkene" not  "Alkyne".

How many liters of oxygen are required to burn 3.86 of CO2??

Answers

1.93 litres. hope i helped!!

What is the new boiling point if 25 g of NaCl is dissolved in 1.0 kg of water

Answers

The correct answer for the question that is being presented above is this one: 

Given that:
delta Tb = Kbm Kb H2O = 0.52 degrees C/m 
delta Tf = Kfm Kf H2O = 1.86 degrees C/m 

We need to know the formula for Molality.
molality = mol solute / kg solvent 

We are given the amount of solute in grams
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Then, use the formula for molality. 

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Use now the formula to get the boiling point.

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20 g of sugar is stirred into a beaker containing 100 g of water. After the sugar has completely dissolved, the solution is put on a scale. What is the mass of the solution?

Answers

The mass of the solution of sugar and water is 120 grams.

What is mass?

Mass is the quantity of matter of a physical body.

The mass of the sugar is given is 20g

The mass of the water is 100 g.

100 + 20 = 120 gram

Thus, the mass of the solution of sugar and water is 120 grams.

Learn more about mass

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The mass of the solution should be 120g since 20g of sugar were added to 100g and 100+20=120.
I hope this helps.  Let me know in the comments if anything is unclear.  
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