Hydrogen and helium in the universe were formed by which of these phenomena?

a. Big bang

b. Fusion in small stars

c. Fusion in very large stars

d. Supernova

How many liters of hydrogen gas at stp are produced from the reaction of 50.0g of magnesium and 75g of hydrochloric acid

What are the characteristics of a gas? no definite shape but a definite volume a definite volume and definite shape a definite shape but no definite volume no definite shape or definite volume

What is a mixture of potassium nitrate powdered charcoal and sulfur called?

The diameter of an average size penny was found to be 1.95 cm. Which digit in the diameter of the penny represents the estimated digit? A 1 B 9 C 5

What is the substance called that is being dissolved in a solution?

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.

At room temperature and pressure what is the volume of one mole of oxygen?

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?