Mass + equation - practice problems - page 5 of 13
Number of problems found: 257
- Crystal
The crystal grows every month 1.2 permille of its mass. How many months to develop a crystal from weight 177 g to 384 g? - KOH
How many g of 20% KOH solution do we need to mix with 500 g of 30% KOH solution to obtain a 25% KOH solution? - Two-thirds 49311
Chocolate pieces hang on a Christmas tree. One-third is made of milk chocolate, two-thirds of the rest is dark, and 200 g is white chocolate. How much do all the pieces weigh together? - Heavy-duty 17941
The railroad workers carried five loads with five heavy trains than ten standard trains. What is the weight of a heavy-duty train if it is 2,200 t heavier than a standard train? - Kilograms 6297
If Adam and Boris weigh a total of 75 kg, Boris and Cyril weigh a total of 83 kilograms, and Cyril and Dano weigh a total of 92 kg, how many kilograms do Adam and Dano weigh together? - Solution 4284
How many grams of table salt and water do we weigh to prepare 500 g of a 15% solution? - Tangerines 3249
The bowl with tangerines weighs 16 kg. When the cook dispenses 2/3 of the tangerines in the school cafeteria, the bowl with the rest of the tangerines weighs only 8 kg. What is the weight of an empty bowl? - Intended 2900
Of the 825 tons, the first part goes for feeding, the second for sale. How many tonnes are intended for feeding if this part makes up 65% of the second part? - Bag
Nelly found an interesting point. An empty bag weighs 4 kg less than the full. An empty bag is five times easier than a full. How many kg weigh things in this bag? - Crates 2
In six crates is 45 kg of apples Five crates are equally apples. In the first crate is 3 kg more apples. How many kilograms are in each crate? - Metal alloy
What is the metal ratio in the alloy in the 50 tonnes of steel to 30 kg nickel? - 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? - Determine 83021
Determine the kinetic energy of a car with a mass of 800 kg if it travels at a speed of 10 m. s-1b, 20m. s-1 - Bent scale
Monica weighed 52 kg. Sara 54 kg. Together they weighed 111 kg. They noticed that the needle on the scale was bent. How much did they really weigh? - Shipments 5620
If you know that a quarter of a mail order and 300 grams weigh the same as the whole shipment, then two such shipments weigh how many grams? - Collected 4815
Pupils collected a total of 42 kg of apples. Peter harvests half as much as Zuzka and Martin, a third less than Petr. How much did each of them harvest? - Mixture 4673
We add 4 kg of tea to 2 kilograms of tea for 15 €, and we get the mixture for 12 €. How much is kg of second tea? - Obtained 2855
50% of pulp is obtained from wood and 60% from paper. How much wood is needed to make 100 tons of paper? - Mushrooms
Fresh mushrooms contain 88% water and dried 14% water. How many kilograms of fresh mushrooms should be collected to get 3 kg of dried? - Mixture 2
How many liters of water must be added to 7 liters of a 20% solution to obtain a 10% solution?
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