A sample of hydrogen gas (H2) was heated until its original temperature of 305 K reached 453 K. If the final volume of the sample is 5.40 L, what was the original volume?

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

What metric units would you use to measure the thickness of a key