An 8.10-g sample of hydrated magnesium carbonate is heated. It has a mass of 4.94 g after heating. What is the percentage by mass of water in the hydrate?

3.16%

17.6%

39.0%

61.0%

What is a scientific claim

What is the predominant intermolecular force in the liquid state of each of these compounds: water (h2o), carbon tetrafluoride (cf4), and dichloromethane (ch2cl2) ?

In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. 2 A ⟶ 3 B How many molecules of substance B are produced when 29.2 g of substance A reacts? The molar mass of substance A is 25.6 g / mol.

The sum of the protons and the neutrons in an atom equals the?

Why do some compounds form double or triple bonds?

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?

Consider the reaction: 8H2S (g) + 4O2 (g) →8H2O (g) + S8 (g). Δ[H2S]/Δt = - 0.033M/s. Find Δ[O2]/Δt. Δ[H2O]/Δt. Δ[S8]/Δt. Find the rate of the reaction.