Mass - practice for 12 year olds - last page
Number of problems found: 510
- Copper sheet
The copper plate has a length of 2.2 m, width 92 cm, and weighs 5.6 kg. What is the plate thickness if 1 m³ weighs 8732 kg? - Carbon dioxide
Calculate how many grams of oxygen are in 50 g of carbon dioxide CO2. The relative atomic mass of oxygen is 16 and of carbon is 12. - Air mass
What is the weight of the air in a classroom with dimensions 10 m × 10 m × 2.7 m? The air density is 1.293 kg/m³. - Barrel of oil
The barrel of oil weighs 283 kg. When it molded 26% oil, it weighed 216 kg. What is the mass of the empty barrel?
- Copper plate
Copperplate length 3.2 m and width 50 cm weigh 55.42 kg. What is the plate thickness if 1 m³ of copper weighs about 8700 kg? - Barrel with liquid
Barrel with grain weight 297 kg. When it sheds 48% of grain, ha weight 174 kg, what is the weight of an empty barrel? - Sumo competition
In the competition for the heaviest man was 5 competitors. The first three together weighed 369 kg. What is the minimal weight of the winner if a contestant weighed with an accuracy of one kilogram? - Solidarity
Imagine a word solidarity means that salt donation to the needy, who have neither the salt. If we take the word solidarity has a word base on salt + gift (only in the Slovakian language). Calculate how many kilos of salt a sympathetic citizen "gives" gove - Density - simple example
Material of density of 1189 kg/m³ occupies a container volume of 64 cm³. What is its mass?
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