2 nf3 + 225 kj - > n2 + 3f2 is it exothermic or endothermic

There is no difference between the question and hypothesis steps of scientific inquiry true or false

When 15.0 mL of a 6.42*10-4 M sodium sulfide solution is combined with 25.0 mL of a 2.39*10-4 M manganese (II) acetate solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to.

The total number of atoms represented by the formula fe2 (so4) 3 is

Which equation has both a liquid and a gas as products

Where do the elements in the human body tend to be located on the table

A gas sample occupies 3.50 liters of volume at 20.°c. what volume will this gas occupy at 100.°c (reported to three significant figures?

Select all that apply. At STP conditions, 0.50 moles of CO (g), Cl2 (g), O2 (g) : will contain the same number of molecules, will contain the same number of atoms, will occupy the same volume, will have the same g. f. w.

A chemist adds 45 ml of a M mercury (II) iodide solution to a reaction flask. Calculate the micromoles of mercury (II) iodide the chemist has added to the flask. Round your answer to significant digits.

The Sun has more gravity than the other planets in our solar system because the Sun is A) hotter. B) more massive. C) made of plasma. D) undergoing fusion.

Molarity tells us ___. A. whether a solution is considered weak or strong B. how many grams of solute are dissolved in a given volume of solution C. the likelihood that a given volume of solution will dissolve more solid D.