A 36

A 36 g sample of the substance contains 91% water. After drying, the weight of the sample was reduced to 18 g. What percentage of water is now in the sample?

Correct answer:

p2 =  82 %

Step-by-step explanation:


Try another example


Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar




Tips to related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions:

  • Water percent
    huby A 15 g sample of the substance contains 70% water. After drying, the substance reduced the weight to 9 g. What percentage of water is now in the sample?
  • Solutions, mixtures
    roztoky How many liters of 70% solution we must add to 5 liters of 30% solution to give us a 60% solution?
  • Mushrooms
    hriby Mushrooms lose 90% by weight drying. How many fresh mushrooms are needed for 5 kg of dried mushrooms?
  • Pharmacist
    roztoky The pharmacist had a 12 l vessel herbal lotion, which contained a 30% active ingredient. Her assistant poured 18 liters of herbal lotion containing 45% of the active ingredient into a container. What percentage of herbal lotion was produced?
  • Alcohol
    metaxa How many cubic centimeters of 96% alcohol is needed to obtain 0.75 liters of 40% alcohol?
  • Peroxide
    chemia How many ml should we pour 30% of peroxide (H2O2) into 100ml H2O to give a 20% solution?
  • Acid
    acid The barrel is 199 liters of 38% acid. How many percent acids occur when 61 liters revoke and replace with the same amount of water?
  • Solutions, mixtures
    roztoky We have 2 liters of 20% solution available. How much 70% solution do we need to add to it to get a 30% solution?
  • Solutions
    bilde How much 60% solution and how much 35% solution is needed to create 100 l of 40% solution?
  • Meat loses
    maso Meat loses 18% of its weight by smoking. How much raw meat butcher used to manufacture 35 kilos of smoked?
  • Clogging
    h2o2 How much-distilled water must the pharmacist add to 30g of a 30% hydrogen peroxide solution to obtain a 3% solution to clogging?
  • Mushrooms
    huby Fresh mushrooms contain 90% water, dried only 12%. How many kilograms of fresh mushrooms are needed for 5kg dried?
  • Vinegar
    vinegar What percentage vinegar we get if we mix 1 if dm³ eight percent vinegar with 1.5 dm³ six percent vinegar?
  • Alcohol mixture
    pipe2 Three liters of 96 percent alcohol set up a certain amount of distilled water to form 54-percent alcohol. How many liters of distilled water was used?
  • Apples 2
    jablka Dried apples contain 15% water. Fresh apples contain 80% water. How many kg of apples we need buy in order to get 3 kg of dried apples?
  • Acid evaporation
    roztoky How many kilograms of water do we have to evaporate from 100 kg of 32% acid to make it 80% concentration?
  • Acid solution
    h2so4 By adding 250 grams of a 96% sulfuric acid solution to its 3% solution, we changed its initial concentration to 25%. How many grams of 3% of the acid was used for dilution?