When

Which of the following is the mass in grams of 4.25×10 ^3 mole of N2

• 1.19 × 10 ^5

• 19 × 10 ^7

• 1.36 × 10 ^9

• 6.34 × 10 ^5

And the reaction into plus 3H2 -> 2NH3. What is the ratio of hydrogen to nitrogen?

• 3:1

• 1:3

• 7:3

• 6:9

How much CA3 ( PO4) two could be produced in a industrialized process of 55 g of CaCl2 in a solution reacted completely with the sufficient Na3 (PO4)

• 78.0

• 51.7

• 12.7

• 82.6

supposed 163.9 g of Na3 (PO4) in a solution mixed with sufficient CaCl2 in a solution yields 116 g of Ca3 (PO4)2 what is the percent yield of CA3 (Po4)2

• 93.6

• 17.6

• 74.8

• 23.6

Students have formal strip of magnesium over inflame until it combustion began. Students were provided the balance chemical reaction for the combustion of magnesium and asked to describe the limited reactant which student correctly describes the limiting reactant.

• Student One – the limiting reactant cannot be determined because the number of moles of oxygen was not known

• Student three – the limiting reactant is oxygen because heat needs to be added before the oxygen reacts with the magnesium

• Student four – the limiting reactant is magnesium because of all the magnesium combusted and the room still contain oxygen

• Student two – the lemonade reactant is magnesium because twice as much magnesium is needed compared to oxygen

And a closest equal amount of pneumonia and oxygen react to produce nitrogen monoxide in water what is the limiting reactant?

4 NH 3+5O2 —> 4NO+ 6H20

• 4NO

• 02

• NH3

• H2

With pressure volume and being known values, the idea of gas can be used to

• Calculate the density

• Calculate the number of moles

• Calculate the kinetic energy

• Calculate the chemical formula

What is the number of one mole of gas at standard temperature and pressure (STP)

• 22.4 L

• 2.4 L

• .24 L

• .024 L

Which of the following is not one of the postulates of kinetic molecular theory of ideal gases?

• The particles are in constant random motion

• The particle size is very small compared to the space between the particles

• The collisions between particles are elastic

• The particles attract, and then each other

Which statement accurately depict the mass and volume of a gas, according to the kinetic molecular theory which regards to defined mass and volume

• Gases have no defined volume but a defined mass

• Gases have no defined volume and no defined mass

• Guesses have a defined volume and no defined mass

• Both have defined vand mass