A gas has a volume of 27.5 L at 302 K and 1.40 atm. How many moles are in the sample of gas?

A. 0.0401 mol

B. 0.645 mol

C. 1.55 mol

D. 2.14 mol

Which of the following is an example of a qualitative measurement? A) blue crystal B) 2 moles of carbon atoms C) 10 g of salt D) 12 dl. of water

What formula equation represents the burning of sulfur to produce sulfur dioxide

What is the oxidation number of sulfur in BaSO4?

Which of the following is the most recent addition to the accepted model of the atom? Atoms are indivisible particles. Protons are located in the nucleus. Electrons form a cloud around the nucleus. Neutrons orbit the nucleus along circular paths.

Which statement is not true regarding nuclear reactions? Alpha, beta, and gamma are types of radiation. Nuclear reactions involve breaking and forming covalent bonds. Nuclear reactions involve a change in an atom's nucleus.

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?