Answer:
1. How many atoms are in 6.5 moles of zinc? 6.5 moles. 6.02 x 10. 23 atoms = atoms. 3. Convert 2.35 moles of carbon to atoms. 2.35 moles 6.02 x 10. 23.
1 mole of H2O weighs 18 g
therefore 13.8 g of liquid H2O = 13.8/18 moles
ΔHvaporization = 40.65 kJ/mol
heat required to change 13.8 grams of H2O from a liquid to a gas at 100 degrees Celsius = 40.65 x 13.8/18 = 31.165 kJ
Answer:
During phase change (e.g. gas to liquid/liquid to solid vice versa), there is no temperature change observed. Thermal energy is not used to increase the kinetic energy of the particles, but to break the intermolecular forces. Thus, the temperature remains constant as all the thermal energy is used up and none of it is absorbed or released.
Answer : The answer in standard form is, 0.00318 mg.
Explanation :
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
As we are given :
First we have to convert scientific notation into standard form.
As per rule, the least precise number present after the decimal point is 5. So, the answer will be, 0.00318 mg.
Result the solution is a basic because .. in there added a strong base.. naoh