Atomic Mass and Atomic Mass Unit

Q. If one mole of carbon atom weighs 12g what is the mass of 1 atom of carbon

Q.

What is 1 atomic mass unit equal to?

Q.

Calculate the mass of 1 molecule of carbon dioxide.

Q.

How do you calculate the atomic mass of carbon?

Q.

Calculate the number of atoms in 46g of Na.

Q.

How to calculate the relative molecular mass?

Q.

Convert into mole 12 gram of Oxygen gas

Q.

The volume of $1.0g$ hydrogen at NTP is _____.

Q. Convert into mole
20g of water

Q.

What is relative molecular mass and relative atomic mass? [2 MARKS]

Q. Molar mass of nitrogen is 14u .What will be the mass of one atom of nitrogen in grams.?

Q.

The average atomic mass of a sample of an element $\mathrm{X}$ is $16.2\mathrm{u}$. What is the percentage of each isotope ${}_8{}^{16}\mathrm{X}$ and ${}_8{}^{18}\mathrm{X}$ in the sample?

Q.

Calculate the mass of sodium which contains same number of atoms as are present in $20gofCa$. (atomic mass $\mathrm{Ca}=40,\mathrm{Na}=23$)

Q. Why is Carbon 12 isotope used as a standard reference for measuring atomic mass?

Q. Calculate the mass of 3.011×10²³ number of nitrogen atoms.

Q.

One mole of oxygen atom weighs 16 grams, what will be the mass (in grams) of 0.4 moles of oxygen atoms?

1. 4 g

2. 6.4 g

3. 640 g

4. ¹/₄ g

Q.

Find the formula mass of${\mathrm{CaSO}}_4$ if the atomic mass of $\mathrm{Ca}$ =$40.1u$ , $\mathrm{S}$=$32.1u$ and $\mathrm{O}$ =$16.0u.$

Q. Which of the following has maximum number of atoms?
a)0.5 g atoms of Cu
b)0.635g of Cu
c)0.25 moles of Cu atoms
d)1g of Cu

Q. Calculate the mass of 6.022×10²⁴atoms of carbon.

Q.

Express mass of $6.022\times {10}^{23}$ molecules of ${\mathrm{CO}}_2$ in grams.

Q.

Isotopes have same........... number but different ................. number.

1. atomic, mass

2. neutron, proton

3. neutron, electron

4. mass, atomic

Q.

The amount of matter in an object is called its ___________.

Q.

What is the active mass of $5\text{g}$$\mathrm{CaO}$?

Q.

What weight of calcium will contain the same number of atoms as are present in $3.2\text{g}$ of sulfur?

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What is the mass of $1\mathrm{mole}$ of nitrogen atoms?

Q.

Which is the lightest gas present in the universe?

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What is the volume of 1 mole of water (density of water = 1gm/ml) .

Q. The atomic mass of calcium of 40u. What will be the number of calcium atoms in 0.4u of calcium

Q.

$1$ unified atomic mass unit is equal to?

Q.

How many atoms of calcium are present in 2g of calcium? (Atomic mass of $\mathrm{Ca}$ = 40)