2c2h2(g)+5o2(g)⟶4co2(g)+2h2o(g) This is a balanced equation for the combustion of acetylene(C2H2). How many moles of oxygen (O2) are required to react completely with 1.0 moles of acetylene.

Options:
A)5.0

B)10.0

C)0.20

D)2.5

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.

What is the chemical formula of magnesium bromide? a. mgbr2 b. mgbr c. mg2br2 d. mg2br

Give 2 characteristics of low mass stars