It took Jackie two hours to mow the lawn. Two weeks later it took her one and one-half hours to mow the lawn. What can be said about the amount of power used by Jackie the second time she mowed the lawn?

A sample of gas in a fixed container at 25.0 Celsius has a pressure of 1.50 atm. If the temperature of the gas is increased to 50.0 Celsius the new pressure will be?

Which of the following is the correct scientific notation for 0.00000862?

The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride. 5 F2 ( g. + 2 NH3 ( g. N2F4 ( g. + 6 HF ( g. ( a. If you have 73.7 g NH3, how many grams of F2 are required for complete reaction? b.

A light has a wavelength of 4.10*10^12m. What is the Frequency?

A sample of sulfur trioxide (SO3) weighs 5100 g. How many molecules are contained in this sample? Use 80.063gmol for the molar mass of SO3.

Mg3 (Si2O5) 2 (OH) 2 There are. 0893 moles of magnesium how many moles of silicon are there in the sample?

The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change? It increases by a factor of two. It increases by a factor of eight. It decreases by a factor of eight.

Write the complete balanced equation for the decomposition of sodium chloride (NaCl)

What is the term for the different phases water can take?

The amazing successes of science are because scientists have followed the rules of science True or false