Chemistry, 20.09.2020 04:01, emaliemcfalls1234
1. Write the number of significant digits given in each of the following measured quantities,
a. 1.008 g/mol
f. 0.00080 g
b. 6.2402 km/hr
g. 3.5 billion yr
C. 1800 yr
h. $10.89
d. -124.0°C
i. 640.5 acres
e. 453.76 mg/ml
j. 0.2 m
Answers: 1
Chemistry, 22.06.2019 08:30, melikefood01
Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?
Answers: 1
Chemistry, 23.06.2019 07:30, jessicawelch25
In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.
Answers: 2
1. Write the number of significant digits given in each of the following measured quantities,
a. 1....
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