The volume of oxygen gas changed from 10 ml to 11 ml as the temperature changed. is this a chemical change or a physcial change

What is the formula mass of beryllium chloride, becl2? express your answer to four significant figures and include the appropriate units?

A copper block (90°C) is placed in contact with a lead block (20°C), which is already in contact with an iron block (70°C). Which of the following will happen? A.

A cube of iron has a temperature of 35°C. It is placed on top of a hot surface with a temperature of 175°C. What will happen to the iron? A) Its temperature will decrease. B) Heat will flow from the hot surface into the iron.

There is approximately 15 milliliters (mL) in 1 tablespoon (tbsp) ? Which expression can be used to find the approximate number of of milliliters in 3 tbsp?

In a sample of solid ba (no3) 2 the ratio of barium ions to nitrate ions is

How are microwaves produced?

Non metals are acidic in nature explain with an equation

How is law of conversation energy and mass similar

Which expression represents the percent by mass of nitrogen in NH4NO3?

What is the molarity of 500 ml of a solution containing 85.0g AgNO3? A) 0.5 M B) 1.0 M C) 2.0 M D) 5.0 M