How to balancing chemical equation?

How many grams of lead sulfide from when 10.0 g of lead are heated with 3.0 g of sulfur

Which of the following is incorest regarding monosaccharides? b) smallest monosaccharides are composed of three carbons.

What would you predict about a chemical that has a hydrogen ion concentration of 1 x 10 to the - 12 power M?

Which of the following would double the pressure on a contained gas at constant temperature? A. doubling the volume of the container B. halving the number of particles in the container C. doubling the number of particles in the container D.

Also is it normal for hair to fall out if they don't have enough vitamin d?

What material was added to powdered rock during tuttle and bowen's experiments?

Which of the following statements is true? Selected Answer: D. At least two of the above statements (A-C) are true. Answers: A. Ions are formed by adding or removing protons or electrons. B. Scientists believe that solids are mostly open space. C.

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.

Given the following reaction 2Al + 3Cl2 - -> 2AlCl3 How many grams of AlCl3 aluminum chloride will be produced from 125 g of Al and 125 g of Cl2?

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO3 (s) → KCl (s) + O2 (g) [unbalanced] What mass of oxygen gas is formed if 26.4 g of potassium chlorate decomposes completely?