The chemical combination of two or more different atoms in fixed amounts is called a (n)

How much work must be done on a 5-kg snowboard to increase its speed from 2 m/s to 4 m/s? A. 22.5 J B. 40 J C. 30 J D. 15 J

A certain reaction has the form aA → bB. At a particular temperature and [A]0 = 2.80 * 10-3 molar, data was collected of concentration versus time for this reaction. A plot of 1/[A]t versus time resulted in a straight line with a slope value of 3.

What causes matter to exist in three different states

How do you know a chemical change has occurred?

Determine the volume of 0.150 M NaOH solution required to neutralize 145 mL of a 0.25 M HCl solution. The neutralization reaction is NaOH (aq) + HCl (aq) → H 2 O (l) + NaCl (aq)

What is the enthaply of the reaction?

Which color has a higher frequency, A. red light B. blue light

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

Which element is classified as an alkali metal? Rb Sr Zr Cl

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.