How many moles of magnesium oxide are there in 2.50 * 10^25 formula units of MgO?

How many neutrons are in an atom with each set of atomic numbers and mass numbers?

5. What plate boundary could form a mountain chain of sedimentary rock? a) Divergent boundary of oceanic crust and continental crust b) Convergent boundary of 2 continental crust c) Convergent boundary of oceanic crust and continental crust d)

Given the reaction:HCl (aq) + LiOH (aq) → HOH (ℓ) + LiCl (aq) The reaction is best described as (1) neutralization (2) synthesis (3) decomposition (4) oxidation-reduction

The cycle that involves the change of water from liquid to vapor and back by evaporation, condensation and precipitation is the: a. carbon cycle c. water cycle b. nitrogen cycle d. none of the above

Which letter (a-f) represents activation energy (Ea) of the forward reaction (reactants) ? Which letter (a-f) represents activation energy (Ea) of the reverse reaction (products) ?

What state of matter has a definite shape but indefinite volume?

1) What is the electron configuration of an electrically neutral atom of sodium? 2) What is the electron configuration of an electrically neutral atom of neon? 3) What is the electron configuration of an electrically neutral atom of oxygen?

5.1 ounces to grams.

Flowering plants reproduce from seeds which role does an Apple play in this process

What would make bromine a group 17 element more similar to a noble gas