Shen's

Shen's chocolate bar is 54% cocoa. If the weight of the chocolate bar is 54 grams, how many grams of cocoa does it contain? Round your answer to the nearest tenth.

Correct answer:

c =  29.2 g

Step-by-step explanation:

$$\begin{gathered} p=54\mathrm{\%}={\displaystyle \frac{54}{100}}=0.54 \\ m=54\text{ g } \\ c=p\cdot m=0.54\cdot 54=29.2\text{ g} \end{gathered}$$

Try another example

Related math problems and questions:

• Grams
  How many grams of 5% solution do we need to add to 100g of 50% solution to get a 20% solution?
• Acid solution
  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?
• CuSO4 mixture
  How many grams of solid CuSO4 we have to add to 450g of 15% CuSO4 solution to produce a 25% solution?
• Concentration
  How many grams of 65% and 50% acid is to be mixed to give 240 g acid with a concentration of 60%?
• Alcohol
  6l 48% alcohol, how much 52% alcohol must be added to give 50% alcohol?
• Alcohol
  How many 55% alcohol we need to pour into 14 liters 75% alcohol to get p3% alcohol? How many 65% alcohol we get?
• Alcohol mixture
  From 55% and 80% alcohol, we have to produce 0.2 kg of 60% alcohol. How many of them do we use in the solution?
• Spirit
  From 55% and 80% spirit we would like to produce 0.2 kg of 60% spirit. How many of them we must use in a solution?
• Alcohol solutions
  We have to produce 2 liters of 60% alcohol from 55% and 80%. How many of which ones will we use in the solution?
• Water solution
  How many grams of salt should we dissolve in 400 g of water to get a 20% solution?
• Vinegar 2
  How many percentages of vinegar solution will we get if we mix 3.5 liters of 5.8% and 5 liters of 7.6% vinegar?
• Pharmacy
  At the pharmacy are in one container 20% solution in the second 50% solution of disinfectant. They need to prepare 4 L of 48-percent solution. What amount of solution from each container is needed to mix?
• Solutions, mixtures
  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
  How much 60% solution and how much 35% solution is needed to create 100 l of 40% solution?
• Mixture 2
  How many liters of water must be added to 7 liters of a 20% solution to obtain a 10% solution?
• Solutions, mixtures
  How many liters of 70% solution must we add to 5 liters of 30% solution to give us a 60% solution?
• Hydrochloric acid
  Determine the concentration of which must have a solution of hydrochloric acid that mixing 10 l of the solution with 8 liters of 26% solution to get the solution with a concentration of 50%?