A student collects a 125.0mL sample of hydrogen gas, but forgot to record the temperature. Later the sample is found to have a volume of 128.6mL when the temperature is 26.0oC. What was the original temperature, in Kelvin, of the gas? Show all your work and round your answer to the hundredths place.

Which compound contain an iron with a 3+ charge

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

What is a number added in front of a formula in order to balance the equation