A helium balloon contains 0.48 g of helium. Given the molecular weight of helium is 4.0g/mol, how many moles of helium does it contain?

What is the most appropriate tool to use when collecting data from an investigation

Solve for P2 when P1 = 2.0 atm V1 = 8.0 L and V2 = 32 L This is a Boyle's law has problem

By what quantity must the heat capacity be divided to obtain the specific heat of that material

If an atom is located in the 3rd period, which of the following is true: A. It will have 2 energy levels. B. It will have 3 energy levels. C. It can hold a maximum of 8 electrons in the third energy level D.

What is the equilibrium constant for the following reaction? 3A + 2B 2C

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2

Synthesize What environmental effects are shared by all fossil fuels?