An unknown substance has a volume of 2 cm and a mass of 38.6 grams what is the density

How does a combustion reaction happen and how can we prevent a combustion reaction from happening?

How many grams of sugar could be in 50 grams of crystallized honey?

How many grams of h2 are needed to react completely with 44.1 grams of c? c + h2 yields ch4 be sure to balance the equation. 7.40 grams 14.7 grams 88.2 grams 132 grams?

Define ionic bond, covalent bond, hydrogen bond, molecular weight, and mole

Three of the strongest lines in the He + ion spectrum are observed at the following wavelength: (1) 11.397 nm (2) 54.030 nm (3) 72.

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.

How many moles of oxygen react with 0.23 moles of NH3

How many moles of carbon do you have in 100 quadrillion carbon atoms? report answer to 2 sig figs