The number of significant figures in 0.000820 g is?

What happens to the gas particles in an inflated ball when it gets a hole? why?

The brain tells his stomach intestines and liver want to be active and want to rest. Messages to and from the brain decide when it's time to process food. Which to organ systems are working together?

The reaction for the combustion of propane (C3H8) is given in this reaction: C3H8 + 5O2 → 3CO2 + 4H2O How many moles of H2O are formed if 5 moles of propane react with oxygen gas? A. 1 B. 4 C. 5 D. 20

Merrill is working in the lab, attempting to identify a mysterious element. Below are the properties she has identified: • dull gray color • does not react to magnets • crumbles when pulled or flattened • reacts slowly to other elements Based on

A sample that is 74.5 percent chloride by mass is dissolved in water and treated with an excess of AgNO3. If the mass of the AgCl precipitate is 1.115 g, what was the mass of the original sample?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda