An observation that requires measurement

True or False: the little numbers to the right of an element are called coefficients

How many valence electrons does a single neutral phosphorous atom have

Describe a way to determine whether a substance conducts electricity

50 grams of propane is placed into a bomb calorimeter at 20 deg C. It is found that the heat released is 50 kj. What is the temperature of the system? The heat capacity of the cariometer is 6.00 kj/C

Name the changes of state where particles become more ordered. why?

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