Arithmetic - 30,-21,-12,-3

How many grams are in 7.9*10^-1 moles of argon

One atom of an element A = 6.644 * 10^-23 gm. calculate the no. of gram atom in 80 kg of it.

Why is mendeleevâs periodic table considered a viable scientific model?

The atomic number of magnesium (Mg) is 12. This is also the number of which of the following?

To form an oxygen molecule to oxygen atoms share two pairs of electrons what kind of bond is shown below by the electron dot diagram of o2

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these

What is the mass of a box of nails

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A.

Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium. Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy