The equation for density is mass/volume. Make sure your units match what is given in the problem.
Statement:
The best way to measure the mass of an orange is to use a balance. You put the orange and the mass pieces in the same cup on the balance and find out how many centimeters it is. The mass of my orange was 145.
Explanation:
Problem 1
The student has not done a good job in measuring the weight of the orange. In fact, the has complicated his simple problem.
Reasons:
- Using the mass pieces and the cup to find the weight of the orange is wrong approach.
He can easily place the orange on the balance and read off the weight.
- Centimeters is a unit of length. What length is he measuring and recording?
The unit of weight is in newtons(N).
- Mass is not read from a balance. A balance gives the weight of substance. Mass is different from weight.
Problem 2
Rewriting to paragraph to correct the errors:
The best way to measure the mass of an orange is to use a balance. You put the orange on the balance and find out how many newtons it is. The weight in newtons can be converted to mass in kilogram. The mass of my orange will be 145kg.
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Components in a mixture don’t chemically react while compounds do chemically react and some of their original properties may be lost. A solution is when the solute mixed with the solvent.
The answer is C. Here is the work:
<span>Moles=molarity * volume
2.5 * 0.5 = 1.25mols of NaCI
Mm of NaCI= 58.442468/mol
Multiply the moles by the Mm and you get the grams
1.25 * 58.442468 =73.1g
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Explanation:
here is the answer to the question