Answer:
There are three forces acting on the skateboard. One of these forces is the weight of the rider. Another is the force of gravity on the board itself. The third is the force of the ground pushing up on the skateboard.
Answer:
i the answer to your question should be C
Explanation:
Hope this helps!
<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
The B. Ca-F pair has the greatest electronegativity difference.
Electronegativities <em>increase from the lower left to the upper right</em> in the Periodic Table.
Ca is closest to the lower left, and F is in the upper right, so the Ca-F bond has the greatest electronegativity difference.
Answer:
4. A subscript is a sentence below a line. You cannot change subscripts in a chemical formula to balance a chemical equation
5. where's/whats the equation??
6. ^^^
Explanation:
