Advertisements
Advertisements
Question
Fill in the blank with the correct word from the options given below:
Relative molecular mass of an element/compound is the number of times one ________ of the substance is heavier than −1/12that the mass of an atom of carbon [C12].
Options
atom
ion
molecule
Solution
Relative molecular mass of an element/compound is the number of times one molecule of the substance is heavier than −1/12 that the mass of an atom of carbon [C12].
APPEARS IN
RELATED QUESTIONS
Calculate the formula masses of the following compounds :
Sodium oxide, Na2O
Calculate the formula masses of the following compounds :
- Calcium chloride
- Sodium carbonate
(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u; O = 16 u)
Convert 12 g of oxygen gas into moles.
Calculate the molar masses of the following substances. Write the results with proper units.
- Ozone molecule, O3
- Ethanoic acid, CH3COOH
The mass of one molecule of a substance is 4.65 × 10–23 g. What is its molecular mass ? What could this substance be ?
Calculate the weight/mass of the molecule of oxygen.
Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
How many moles of Calcium carbonate is involved in this reaction?
The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 1024kg). Which one of the two is heavier and by how many times?
Write the formulae for the following and calculate the molecular mass for each one of them.
- Caustic potash
- Baking powder
- Limestone
- Caustic soda
- Ethanol
- Common salt
A gas occupied 360 cm3 at 87°C and 380 mm Hg pressure. If the mass of gas is 0.546 g, find its relative molecular mass.