<span>1. A gas occupies 4.31 litres at a pressure of 0.755atm. Determine the volume if the pressure is increased to 1.25 atm.
method: </span>Boyles Law<span>: P1/V1 = P2/V2
</span>P1/V1 = P2/V2 implies V2= P2 V1/ P1
V2=1.25x4.31 / 17=7.13L
<span>
2. 600 mL of a gas is at a pressure of 8.00atm. What is the Volume of the gas at 2 atm?
</span>method: Boyles Law: P1/V1 = P2/V2
P1/V1 = P2/V2 implies V2= P2 V1/ P1,
V1=2.6mL=0.026L
V2= P2 V1/ P1= 0.00065 L
<span>3. How hot will a 2.3 L balloon have to get to expand to a volume of 400 L? Assume that the initial temperature of the balloon is 25 degrees Celsius.
</span><span>Method: Charles Law: V1/T1 =V2/T2 Degrees Celcius + 273 = Kelvin
</span>
25 degrees Celsius=25+273=298K=T1
V1=2.3L, V2=400L
V1/T1 =V2/T2 implies T2=V2T1/V1=(400x298) /2.3=51826 K
<span>4. A gas takes up a volume of 17 litres, has a pressure of 2.3atm, and a temperature of 299K. If I raise the temperature to 350K and lower the pressure to 1.5atm, what is the new volume of the gas?
</span>
<span>Combined gas Law: (P1)(V1) = (P2)(V2)
(T1) (T2)</span>
V1=17L
P1=2.3 atm
T1= 299K
P2=1.5 atm
T2=350 K
V2=?
(P1)(V1) / T1= (P2)(V2)/ T2
so V2= (P1)(V1) T2 / P2 T1
V2=17x2.3x350 /1.5 x 299= 30.51L
Answer:
zero gram present after the reaction is completed
B, a. hopefully that helps
Answer:
Volumes can have the same volume but different masses if they have different densities. For example, a 10 x 10 x 10 block of lead has the same volume as a 10 x 10 x 10 block of pine wood, but the lead block weighs 22.6 times more than the pine block. Indeed, the density of lead is high enough that the lead block will sink in water, whereas the pine block's density is low enough that the pine block will float in water.
Volume is a measurement, the units are cubic metres or cubic centimetres. Litres = 1000 cm3
Mass is a measurement, the units are grams, kilograms.
^^^^^^^^^^^^^^^^^^
to that answer.
Mass is not weight. it is the amount of matter an object takes up. Therefore, saying that a lead block weights 22.6 times more than the pine block does not answer how an object can have different masses but the same volume. :D
Answer:
The substance which responds to the change in the concentration of the hydronium ions in solution by changing its color is known as an indicator.
