Chemistry, 19.11.2019 20:31 trying2passs
Which option accurately describes an unbalanced force?
a. a 2-n force presses down on the cement block at the same time as a 1.5-n force presses up on the cement block.
b. the force of a house pressing down on its foundation of cement blocks is 3,000 n.
c. each cement block supports a 2-n force, but when the foundation is built in a staggered pattern, it can support 2,000 n.
d. three rows of cement blocks form a foundation for a house, and the house rests on this foundation.
Answers: 3
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Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
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For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)
Answers: 1
Which option accurately describes an unbalanced force?
a. a 2-n force presses down on t...
a. a 2-n force presses down on t...
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