A) Suggest any three methods for the preparation of H2 gas by selecting suitable substance given below.

Na, Zn, CaH2, H2O, Al, NaOH, HCl

Compare an ionic and a molecular compound in terms of how each is formed

Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each use the same stopwatch to measure the time.

Q2 What is the molarity of a solution that contains 0.500 mole of KNO, dissolved in 0.500-liter of solution? (1) 1.00 M (3) 0.500 M (2) 2.00 M (4) 4.00 M

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese (IV) oxide. 4 HCl (aq) + MnO 2 (s) ⟶ MnCl 2 (aq) + 2 H 2 O (l) + Cl 2 (g) A sample of 37.3 g MnO 2 37.3 g MnO2 is added to a solution containing 50.

Suppose you want to do an experiment to hear how three different objects would sound when you dropping them the same distance. you drop a pebble a rock, and a grain of sand. what are the variables of your experiment

Which of the following locations would most likely have the most fertile soul?

What is an "alloy" in the chapter of metals in chemistry?

Which one of the atoms shown would be most likely to form a cation with a charge of 1?

Name 5 descriptions of a key including mass

How many moles of hydrogen gas will form 1.35 L of a 2.75 M Hcl solution reacts?