How to calculate molar mass

Answers

Answer 1

Answer: Molar masses of chemical compounds are equal to the sums of the molar masses of all the atoms in one molecule of that compound. After that, If you have a subscript in a chemical formula, then you multiply the number of atoms of anything next to that subscript by the number of the subscript. I'm kinda new to this stuff. Hopefully I helped :/

Answer 2

Answer: Molar mass is the sum of all atomic masses in a given compound in relative grams. To explain how to calculate the Molar mass, let me show you an example.

Calculate the Molar mass of H2O

now, atomic mass of H - 1
Atomic mass of O - 16

Now, molar mass = 1(2) + 16

= 2 +16
= 18 u = 18 grams (relative mass in grams)

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Which solution has a molality of 0.25m nacl?

Answers

Molality can be expressed by moles of solute over kilograms of solvent. The question asks the molality of 0.25m NaCl. 0.25m NaCl is equal to 0.25 moles of NaCl over 1 kg of water.

0.25 moles of NaCl over 1 kg of water

Which is a substance that is made up of only one type of atom?

Answers

an element such as hydrogen

An element is made up of one type of atom only and cannot be split further.

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?

Answers

Element X is sodium. Sodium has one less valence electron than beryllium and it has the electron configuration of 2,8,1, thus it has one more shell of electrons.

Answer:

sodium

Explanation:

If the substances below, which is best able to conduct electricity? a. KBr(l)
b. NaC₂H₃O₂(s)
c. C₆H₁₂O₆(aq)
d. CH₃OH(aq)
e. NaCl(s)

It would be great if you could add a few words of explanation

Answers

The best one is the substance with more free electrons therefore it is d.

Temperature and kinetic energy have a relationship.

Answers

Answer:

$\boxed {\boxed {\sf Temperature=Average \ kinetic \ energy}}$

Explanation:

Temperature is also known as the average kinetic energy in a substance.

If there is an absence of heat in a substance, the particles move slower and the kinetic energy decreases. The temperature will be lower, because there is less kinetic energy.

If heat is present or applied, the particles move more, so kinetic energy increases. The temperature will be higher, since there is more kinetic energy.

So, the relationship is: temperature is the measure of average kinetic energy.

Answer:

DIRECT

Explanation:

Which of the following is an example of a covalent compound?

Answers

Answer:

CCI2

Explanation:

Other Questions

A solution with a pH of 8.0 isa. acidic. b. neutral. c. weakly basic. d. strongly basic.

Which of the following solutions has the highest pH: can you also explain how you can determine if a solutions have a highest pHa)1.00 mol L HNO3 (aq)b)1.00 mol L KOH (aq)c)1.00 mol L NaCL (aq)d)1.00 mol L solution of CaCL2 (aq) At equal concentrations, which of the following solutions is the most conductive?a) C6H12O6 (aq)b) CH3COOH (aq)c) HClO4 (aq)d) CH3OH (aq)

Chemical reactions can be detected by changes in

The change that is undergone by an atom of an element made radioactive by bombardment with high-energy protons is called(1) natural transmutation(2) artificial transmutation(3) natural decay(4) radioactive decay