If 4520 kJ of heat is needed to boil a sample of water, what is the mass of the sample of water (ΔHvaporiztion = 2260kJ/kg) ?

How many moles of pcl5 can be produced from 60.0 g of cl2 (and excess p4) ?

The study of the structures of deep-sea vents and of the life around them represents an intersection of which two fields of science? A. geology and meteorology B. geology and oceanography C. astronomy and meteorology D. astronomy and oceanography

Which group of elements reacts violent with elements from Group 1

Clues about the history of the earth have been obtained from the study of fossil fuels rain forest materials soll samples O synthetic plastics

He best ultraviolet observations are made with space telescopes because A. the Sun blocks most ultraviolet light from distant stars. B. the Earth's gravity reflects most ultraviolet light from distant stars. C.

Which of the following will most likely happen if you apply unbalanced forces to an object? It will change position. It will become charged. It will change mass. It will change size.

Magnetism easily separates what mixture? A). Sand and glass B). Sand and iron C). Sand and clay D). Sand and aluminum

Match the science with the best description?

Can magnetism be used to identify a substance

Nitrogen dioxide dimerizes to give dinitrogen tetroxide: 2NO2 (g) → N2O4 (g). At 298 K, 12.55 g of an NO2/N2O4 mixture exerts a pressure of 0.963 atm in a volume of 6.92 L. What are the mole fractions of the two gases in the mixture?