A carbon-12 atom has a mass of 12.00000 amu. The mass of a proton is 1.00728 amu, and the mass of a neutron is 1.00866 amu. How many protons does the carbon-12 atom have? How many neutrons does the carbon-12 atom have? What is the mass defect of a carbon-12 atom? amu

Answers

Answer 1

Answer: A carbon - 12 atom and aregular carbon atom would have the same number of protons which is 6. So acarbon - 12 atom would have 6 protons. Both, however, would differ in thenumber of neutrons. Carbon - 12 atom has 6 neutrons. To determine the massdefect of a carbon - 12 atom, we have to add the total mass of protons and thetotal mass of neutrons and subtract the known mass of a carbon - 12 atom. Thatwould be like this.
6(1.00728 amu) + 6 (1.00866 amu) = x
6.04368amu + 6.05196 amu = x
12.09564amu = x

Thensubtract it with 12 amu to get the defect mass

12.09564amu - 12.00000 amu = y
0.09564amu = y

So thedefect mass would be 0.09564 amu.

Answer 2

Answer:

Answer:

0.09564

Explanation:

Just did it my fellow people of the planet Earth.

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As the temperature of a chemical reaction in the gas phase is increased, the rate of the reaction increases because(1) fewer particle collisions occur
(2) more effective particle collisions occur
(3) the required activation energy increases
(4) the concentration of the reactants increases

Answers

Answer: option (2) more effective particle collisions occur.

Justification:

Always keep in mind that the temperature is a measure of the average kinetic energy of the particles.

The higher the temperarute the hiigher the kinetic energy.

Also, remeber that the kinetic energy is the energy of motion: the higher the kinetic energy the hgher the speed of the particles and the more energetic the collisions.

Therefore, those more energetic collisions will increase the number of collisions that overcome the activiation energy leading to higher rate of conversion (reaction), whic is what a more effective particle collisions occur mean.

Using the atomic masses and relative abundance of the isotopes of nitrogen given below, determine the average atomic mass of nitrogen. N-14: 14.003 amu; 99.63% N-15: 15.000 amu; 0.37%

Answers

The formula for average atomic mass is :

mass of isotope A * % of isotope A + mass of isotope B * % of isotope B + ....

Now,
Here,
Average atomic mass of nitrogen = (14.003 * 99.63%) + (15.000 * 0.37%)
= (14.003 * 0.9963) + ( 15.000 * 0.0037)
= 13.951 + 0.056
= 14.007 a.m.u.

A) How many moles of gold atoms are present in a 295-gram sample of gold? B) How many gold atoms would there be in the sample?

Answers

The molar mass of gold, Au, as seen on the periodic table, is 196.97 grams per mole. So, do this to find the number of moles in a 295 gram sample:

$(295g\ Au)((1mol\ Au)/(196.97g\ Au)) = 1.49769mol\ Au$

So, a 295 gram sample of gold has about 1.5 moles of gold in it.

To find the number of atoms, multiply the number of moles by Avogadro's number:

$(1.49769mol\ Au)((6.022*10^(23)\ atoms)/(mol)) = 9.02 * 10^(23)\ atoms\ Au$

5 gram of 197 Au contain 1.53*10^22 atoms. so just multiply that with 59 to get 295 grams :)

Which of the following atoms would have the smallest atomic radius?

Answers

Answer:

Lithuim is the smallest

Explanation:

i hope this helps!!

What is a chemical bond? A. The attraction of two atoms that holds the atoms together
B. A substance that's composed of atoms
C. A representation of chemical properties
D. The force that holds together the elements in a compound

Answers

A., I believe. It's either an ionic, covalent, or hydrogen bond

Chemical bond is the attraction of two atoms that holds the atoms together.

Which sample has particles with the lowest average kinetic energy?(1) 1.0 g of I2 at 50.°C
(2) 2.0 g of I2 at 30.°C
(3) 7.0 g of I2 at 40.°C
(4) 9.0 g of I2 at 20.°C

Answers

The question asks average kinetic energy. So it is only related with the temperature. The higher temperature is, the higher kinetic energy is. So the answer is (4).

Answer : Option 4) 9.0 g of $I_(2)$ at 20°C

Explanation : Usually the average kinetic energy depends upon the state of the matter. Considering about the iodine at lower temperature the kinetic energy is found to be low. Whereas at higher temperature has higher kinetic energy value.

From the kinetic energy equation it can be easily related that K.E. is directly proportional to the temperature.

Refer the attached image for the relationship of temperature with kinetic energy.

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