In an exothermic reaction what is true of enthalpy?

A) it has increased

B) it has decreased

C) it has remained unchanged

D) it has a minimum doubled

A sample of air is composed of nitrogen, oxygen, and argon gases. if the partial pressure of nitrogen is 587 mm hg, oxygen is 158 mm hg, and argon is 7 mm hg, what is the total pressure? 1512 mm hg 8 mm hg 100 mm hg 422 mm hg 752 mm hg

Is sodium hydroxide dissolves in water a physical change

CaSO4 + AlBr3 > CaBr2 + Al2 (SO4) 3 What will the coefficient of CaBr2 when the equation is balanced using the smallest possible whole number coefficient

According to the electromagnetic spectrum, which part has the most energy?

If an atom has an atomic mass of 24 and its atomic number is 11, how many protons will it have? Electrons? Neutrons?

What is the empirical formula of a compound composed of 32.9g of potassium and 6.73 g of oxygen

Glucose is not made from which of the following

Rank the temperatures from the highest to the lowest. 133F 351K 25C 273K 146C 58F 95F

Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g.

Where the single machos?