What is the atomic mass of an atom with 9 protons 11 neutrons and 9 electrons

When 10 grams of copper and 10 grams of iodine are mixed, what is the theoretical yield of copper I iodide? 2Cu + I2 → 2CuI

Predict what will happen to the hydrogen ion concentration in the pH of water if I can if hydrochloric acid is added to the water

Which of the following is evidence for a physical change? A) burning B) fizzing C) evaporating D) rusting

The combustion of 0.0272 mole of a hydrocarbon produces 1.9584 g H2O and 3.5927 g CO2. What is the molar mass of the hydrocarbon?

How many electrons are there in the valence shell of the carbon atom of the methyl anion, CH3-? O a 2 Ob. 4 O 0.6

What are two types of local winds?

For a given reaction, adding a catalyst increases the rate of the reaction by (1) providing an alternate reaction pathway that has a higher activation energy (2) providing an alternate reaction pathway that has a lower activation energy (3) using

An element which forms an oxide that dissolves in water to form an acidic solution.

Milk of magnesia is a base. What happens when you drink milk of magnesia for an upset stomach? A) It raises the pH of your stomach. Eliminate B) It lowers the pH of your stomach. C) It cleanses the stomach of harmful, painful bacteria.

Which of the following can be classified as an empirical formula? Why? A. S2Cl2 B. C6H10O4 C. Na2SO3