Which formula represents an acid?

A. CH4

B. HCl

C. NH3

D. PH3

The atom of which element is bigger than an atom of calcium? - Be (Beryllium) - Sr (Strontium) - Sc (Scandium) - Mg (Magnesium)

At around 1510 º C, solid iron changes to its liquid form. This is an example of Freezing Melting sublimation boiling

If 250.3 l of hydrogen gas (d = 0.0899 g/l) reacts with an excess of nitrogen gas, what mass of ammonia would be produced?

Why pressure increases as a gas is compressed into a smaller volume?

What's the definition of miscible?

Which substance is the limiting reactant when 4.0 g of sulfur reacts with 6.0 g of oxygen and 8.0 g of sodium hydroxide according to the following chemical equation: 2 S (s) + 3 O2 (g) + 4 NaOH (aq) → 2 Na2SO4 (aq) + 2 H2O (l) A. O2 (g) B. S (s) C.

If EG = 19 and FG = 12 then EF = ?

Given the following reaction: 4Fe + 302 → 2Fe2O3 How many grams of Fe2O3 will be produced from 24.0 g of Fe and 5.00 g of O2? grams (round to three significant figures)

Which Group 16 element combines with hydrogen to form a compound that has the strongest hydrogen bonding between its molecules? 1. oxygen 2. selenium 3. sulfur 4. tellurium

How many hydrogen atoms are in 2.80 mol of ammonium sulfide?