The table shows the chemical formulas for four substances. c8h18https://staarbank. schoolobjects. com/eduphoria_webcontrols/tests/Tes tImage. aspx?bnk=staarbank&aid=9b51137e -2d09-457a-bd71-6bc1f7bd5bb8&mo de=edit
Which substances have the same number of carbon atoms?
A. Substances 1 and 2
B. Substances 1 and 3
C. Substances 2, 3, and 4
D. Substances 2 and 3 only

Calculate the number of molecules present in 0.750 mol of mgo.

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.

Fill in the blanks for the following statements: the rms speed of the molecules in a sample of h2 gas at 300 k will be times larger than the rms speed of o2 molecules at the same temperature, and the ratio µrms (h2) / µrms (o2) with increasing temperature. a not enough information is given to answer this question b sixteen, will not change c four, will not change d four, will increase e sixteen, will decrease