What properties differentiate liquids from gases and solids?

If the reaction of A and B resulted in A²⁺ and B⁻ ions, A and B come from what groups of the periodic table?

Is the following an element or an ion? Provide the complete symbol for the element.

Locate the following elements in the periodic table and identify the charge on their ions.

a. Na
b. Br
c. N
d. Ca

What is the difference between atomic mass, atomic weight, and molar mass?

Calculate the molar mass of the drug glimepiride (C₂₄H₃₄N₄O₅S).

Calculate the molar mass of element X if an 83.6-g sample of the compound X₂O₃ contains 39.4 g of oxygen atoms.

Consider a sample of nicotine, C₁₀H₁₄N₂ that contains 3.561 x 10²⁵ nitrogen atoms. Calculate the number of nicotine molecules in the sample.

i) Calculate the mass (in grams) of 2.639 mol of cobalt(III) carbonate.

ii) Calculate the moles of ammonium ions in 9.631 g of ammonium sulfate.

iii) Calculate the mass (in grams) of 8.69 × 10²² molecules of caffeine, C₈H₁₀N₄O₂.

A  titanium cube has sides that measure 2.50 cm and has a mass of 28.1 g. Calculate the number of titanium atoms in the cube if a single titanium atom has a mass of 47.8 u.

Suppose that a reaction occurs for the mixture of substances in the illustration below,

choose the product mixture illustration for the reaction that obeys the law of mass conservation

At equilibrium, the following decomposition reaction has 2.38 g NaNO₃, 3.92 g NaNO₂, and 1.29 g O₂.

2 NaNO₃  (s) → 2 NaNO₂ (s) + O₂ (g)

How much in grams of NaNO₃ is there originally if it is the only substance at the start of the reaction?

Consider the reaction: 2 Cl(g) → Cl₂(g). In a reaction where all Cl(g) was converted to Cl₂(g), the mass of Cl₂(g) produced is twice the mass of the Cl(g) reacted. Is this statement true or false?

Cesium iodide has a cesium to iodine mass ratio of 1.047:1. When a sample of cesium iodide is completely decomposed, 27.88 g of cesium is produced. What mass of iodine (in grams) is produced?