A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight of the watch glass and sample in grams?
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To find the weight of the watch glass and sample, you need to add the weight of the watch glass to the weight of the sample.
Given information:
Weight of the watch glass = 9.203 g
Weight of the sample = 141 mg
However, to perform calculations, it is important to use the same unit for both quantities. Since the sample weight is given in milligrams (mg), we need to convert it to grams (g).
1 gram (g) = 1000 milligrams (mg)
To convert milligrams to grams, divide the weight of the sample by 1000:
141 mg ÷ 1000 = 0.141 g
Now that the sample weight is in grams, we can add it to the weight of the watch glass:
Weight of the watch glass + Weight of the sample
= 9.203 g + 0.141 g = 9.344 g
Therefore, the weight of the watch glass and sample combined is 9.344 grams.