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

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.