Mixtures and solutions - practice problems
Number of problems found: 187
- Two alloys
Two alloys Y and Z are each made up of zinc, tin and copper. In alloy Y, the ratio of zinc to tin is 2:5 and the ratio of copper to tin is 4:3. Determine the ratio, copper: zinc: tin in alloy Y.
- Fertilizer mixture
A fruit company uses two types of fertilizers in an orange groove, brand A and brand B. each bag of brand A contains 8 pounds of nitrogen and 4 pounds of phosphoric acid. Each bag of brand B contains 7 pounds of nitrogen and 6 pounds of phosphoric acid. T
- Saving at market shop
Mr. Akpalu went to a market to purchase 3 kg of sugar, 10 kg of wheat and 1 kg of salt. In a shop near to Mr. Akpalu's residence, these commodities are priced at € 20, €10 and € 6 per kg whereas in the local market these commodities are priced at € 15, 8
- Tributaries 70734
The pool would fill with three identical tributaries in 52 hours. After 20 hours, two more inlets were added. How many hours did the pool fill up?
- Solutions 70424
To what extent do we need to mix 82% and 54% solutions to get a 76% solution?
- Collection 70394
We mixed two types of candies into the collection. The first species for 36 CZK per 1 kg, the second species for 54 CZK per 1 kg. What was the price of one kg of a mixture?
- Fertilizer 68694
0.6 l of fertilizer goes to 40 l of water. How much fertilizer should be put per 10 liters of water?
- A beauty
A beauty supply company has 53 liters of 5% hydrogen peroxide solution on hand. The company also has a nearly limitless amount of a solution that contains 35% hydrogen peroxide. How many liters of the 35% hydrogen peroxide solution should the company add
- Five-crown 63854
Petra has two-crown and five-crown coins. He has ten coins in the coffers. How many two crowns and how many five crowns if she saved CZK 29?
- Kilograms 63624
How many kg of iron and how many kg of sulfur does 100 kilograms of iron sulfide (FeS) contain if the relative atomic weight of iron is 52 and sulfur 32?
- Temperature 63004
Brass weighing 2.5 kg absorbs the heat of 180 kJ. How does the temperature of the brass change? The specific heat capacity of brass is 0.36 kJ / C
- Castle Museum
A large number of medieval cannons made of cannon were found in the Castle Museum (cannon is an alloy of tin and copper in a ratio of 1: 9). The councilors agreed that they did not need cannons, but a new bell would be thrown at the town tower. The bells
How many kg of tin is in 3.6 kg of bronze if it contains 15% tin?
Manganese bronze contains the following amounts of metals per pound: copper 0.89 lb, tin 0.10 lb, and manganese 0.01 lb. How much copper is in a shaft that weighs 235 pounds?
- Nitric acid
We want to prepare 200 g of 30% nitric acid. We have enough 12% and 60% of this acid. How many of which will we need?
- Following 60793
I want to turn to help with the following example. How do I reach an 8% solution? I need to mix 3.5% milk with 33% cream. Thank you for your help.
Bronze has 80% copper and 20% tin. How much copper will we need to produce bronze if we have 39kg of tin?
The ratio of dry matter and water is 1: 9 for most mushrooms. Dry matter consists of carbohydrates, proteins, minerals, fat and water in a ratio of 50: 30: 8: 3: 9. How many kg of fresh mushrooms need to be processed into a 10 kg package of dried mushroom
- 24carat gold
The goldsmith cast 22 carat gold and 14 carat gold and earned 20 dkg of 18 carat gold. How much gold did he use?
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?