The moons phases depend on how much the earth blocks light between the sun and the moon. The phases depend on where the moon is in respect to the sun in space.
Answer:
The answer is 55.2 that is correct
Explanation:
Answer:
![\boxed {\boxed {\sf 0.757 \ atm}}](https://tex.z-dn.net/?f=%5Cboxed%20%7B%5Cboxed%20%7B%5Csf%200.757%20%5C%20atm%7D%7D)
Explanation:
We are asked to find the pressure of a gas given a change in volume. Since the temperature remains constant, we are only concerned with volume and pressure. We will use Boyle's Law, which states the volume is inversely proportional to the pressure. The formula for this law is:
![P_1V_1= P_2V_2](https://tex.z-dn.net/?f=P_1V_1%3D%20P_2V_2)
Initially, the oxygen gas occupies a volume of 18.7 liters at a pressure of 1.19 atmospheres.
![1.19 \ atm * 18.7 \ L = P_2V_2](https://tex.z-dn.net/?f=1.19%20%5C%20atm%20%2A%2018.7%20%5C%20L%20%3D%20P_2V_2)
The gas expands to a volume of 29.4 liters, but the pressure is unknown.
![1.19 \ atm * 18.7 \ L = P_2 * 29.4 \ L](https://tex.z-dn.net/?f=1.19%20%5C%20atm%20%2A%2018.7%20%5C%20L%20%3D%20P_2%20%2A%2029.4%20%5C%20L)
We are solving for the new pressure, so we must isolate the variable
. It is being multiplied by 29.4 liters. The inverse operation of multiplication is division. Divide both sides of the equation by 29.4 L.
![\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =\frac{ P_2 * 29.4 \ L}{29.4 \ L}](https://tex.z-dn.net/?f=%5Cfrac%20%7B1.19%20%5C%20atm%20%2A%2018.7%20%5C%20L%7D%7B29.4%20%5C%20L%7D%20%3D%5Cfrac%7B%20P_2%20%2A%2029.4%20%5C%20L%7D%7B29.4%20%5C%20L%7D)
![\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =P_2](https://tex.z-dn.net/?f=%5Cfrac%20%7B1.19%20%5C%20atm%20%2A%2018.7%20%5C%20L%7D%7B29.4%20%5C%20L%7D%20%3DP_2)
The units of liters cancel.
![\frac {1.19 \ atm * 18.7 }{29.4 } =P_2](https://tex.z-dn.net/?f=%5Cfrac%20%7B1.19%20%5C%20atm%20%2A%2018.7%20%7D%7B29.4%20%7D%20%3DP_2)
![\frac {22.253}{29.4 } \ atm = P_2](https://tex.z-dn.net/?f=%5Cfrac%20%7B22.253%7D%7B29.4%20%7D%20%5C%20atm%20%3D%20P_2)
![0.7569047619 \ atm =P_2](https://tex.z-dn.net/?f=0.7569047619%20%5C%20atm%20%3DP_2)
The original measurements all have 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place. The 9 in the ten-thousandth place to the right of this place tells us to round the 6 up to a 7.
![0.757 \ atm \approx P_2](https://tex.z-dn.net/?f=0.757%20%5C%20atm%20%5Capprox%20P_2)
The pressure of the gas sample is approximately <u>0.757 atmospheres.</u>
ANSWER: B salt does not evaporate with water
![▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪](https://tex.z-dn.net/?f=%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%20%20%7B%5Chuge%5Cmathfrak%7BAnswer%7D%7D%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA)
Distance covered in 12 minutes = 18 km, now
Unit rate is equal to :
The train travels 1.5 km in 1 minute time interval.