What is the purpose of the catalyst?

A. to start the chemical reaction

B. to stop the chemical reaction

C. to speed up the chemical reaction

D. to make the chemical reaction safe to observe

Which of the following occurs during heat transfer between a hotter body and a colder body? Thermal energy of the hotter body decreases and kinetic energy of the hotter body increases.

How many atoms are in 1.4 mol of phosphorus trifluoride (PF3) ?

If 89.6 joules of heat are needed to heat 20 g of iron from 30 c to 40 c, what is the specific heat of the iron in j/cg

An unknown gas at 130 celsius has a rms speed that is 0.50 that of the rms speed of N2 molecules at 50 degrees celsius. What is the molecular weight of unknown gas?

How many moles are equivalent to 55.5g of NaNo3

At a certain temperature this reaction follows second-order kinetics with a rate constant of 14.1 M-1s-1 : 2SO3g - -> 2SO2g + O2g Suppose a vessel contains SO3 at a concentration of 1.44M. Calculate the concentration of SO3 in the vessel 0.

A fusion reaction takes places between carbon and another element. Neutrons are realeased, and a different element is formed. The different element is?

What is the molarity of a solution prepared by dissolving 1.56 g of gaseous hcl (molar mass = 36.5 g into enough water to make 26.8 ml of solution?

Elementary row operations on an augmented matrix never change the the solution set of the associated linear system. True or False?

Element A has an electronegativity of 2.20. Element B has an electronegativity of 3.44. The bond of molecule AB is then best described as a: