Given this balanced equation: 1 K2CrO4 + 1 Pb(NO3)2 -> 1 PbCrO4 + 2 KNO3

If you want to make 1.71 moles of PbCrO4 , how many mole of K2CrO4 do you need?

What is a property of a double replacement reaction

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.