How many moles of oxygen (O) atoms are in a sample of 3.98 * 1023 atoms?

The term odorless or colorless are quantitive terms true or false

Select all the characteristics that will probably yield an ionic bond. Each answer refers to two atoms, Atom X and Atom Y. Atom X is referred to first, and Atom Y is referred to second. A. low E. N., low E. N. B. high E. N., low E. N. C. high E. N.

Use the provided reactions and their changes in enthalpy H2O (ℓ) ←→ H2 (g) + 1 2 O2 (g) ∆H = 285.8 kJ · mol-1 CH4 (g) + 2 O2 (g) ←→ CO2 (g) + 2 H2O (ℓ) ∆H = - 890.0 kJ · mol-1 CH4 (g) ←→ Cgraphite (s) + 2 H2 (g) ∆H = 74.

Has a tomato been proven as a fruit I think so

Define: Law of Definite Proportion

Find the acceleration if a car goes from 40 to 50 mph in 5 seconds

What is the percent by mass of nahco3 in a solution containing 10 g of nahco3 dissolved in 400 ml of h2o?

Consider the reaction: 2clf3 (g) + 2nh3 (g) → n2 (g) + 6hf (g) + cl2 (g) when calculating the δh°rxn, why is the δhf° for n2 not important?

12.5 g of copper are reacted with an excess of chlorine gas, and 25.4 g of copper (II) chloride are obtained. Calculate the theoretical yield and the percent yield.

Section 20.1 the meaning of oxidation and reduction answer key