Which of these is an example of a physical change?

sugar dissolving in warm water

iron rusting in the presence of moist air

wood burning in the presence of oxygen

baking soda reacting with acid to form a gas

If a quadrilateral has three angels measuring 60, 45 and 100 find the measure of the fourth angel

In the reaction K2CrO4 (aq) + PbCl2 (aq) → 2KCl (aq) + PbCrO4 (s), how many grams of PbCrO4 will precipitate out from the reaction between 500.0 milliliters of 3.0 M K2CrO4 in an excess of PbCl2? A. 1.5 grams B. 3.0 grams C.

What is a part of every cell

Properties of a diamond

List two fossil fuels. Describe in general how fossil fuels were formed.

Which compound conducts electricity only in the molten state? A. sodium bromide B. calcium hydroxide C. barium sulfate D. magnesium sulfate

What is going to happen to a balloon filled with helium that is left in a car over night when the temperature drops approximately 20 degrees

Members of which group easily lose an electron to form a 1 cation? A. halogens B. alkaline earth metals C. noble gases D. alkali metals

How to convert 0.000984 into scientific notation?

What is the total pressure in a 6.00-l flask which contains 0.127 mol of h2 (g) and 0.288 mol of n2 (g) at 20.0°c?