A machine has an efficiency of 70%. How much woke does the machine do when 20,000 J of work is done on it?

What is the only way in which humans and other animals can obtain nitrogen?

If 2.96 g of methane gas (CH4) is introduced into an evacuated 2.20 L container at 40.°C, what is the pressure in the container?

Identify what a bomb calorimeter measures. identify what a bomb calorimeter measures. measures δh for reduction solutions measures δe for combustion reactions measures δh for aqueous solutions measures δt for aqueous solutions measures δe for

what kind of change occurs when sodium and chlorine combine? Describe the matter before and after the change

How many milliliters are equal to 0.399195L

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?

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.