The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled Q? A.
the force of magnetism
B.
the force of gravity
C.
the net force of the object
D.
the force of air resistance

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?