Answer:
10.3
Step-by-step explanation:
d = sqrt ((x2 - x1)^2 + (y2 - y1)^2)
(7,-2)....x1 = 7 and y1 = -2
(-2,3)...x2 = -2 and y2 = 3
now we sub
d = sqrt ((-2 - 7)^2 + (3 - (-2)^2)
d = sqrt ((-9^2) + (5^2))
d = sqrt (81 + 25)
d = sqrt (106)
d = 10.295 rounds to 10.3 <===
Answer:
i dont think this is wright but i got 48
Step-by-step explanation:
Answer:
Molar mass = 254.60g/mol
Step-by-step explanation:
Mass = 8.02g
Volume = 812mL = 0.812L
Pressure (P) = 0.967atm
Temperature of the gas = 30°C = (30 + 273.15)K = 303.15K
Molecular weight = ?
To solve this question, we'll have to use ideal gas equation, PV = nRT
P = pressure of the gas
V = volume of the gas
n = number of moles of the gas
R = ideal gas constant = 0.082J/mol.K
T = temperature of the gas
PV = nRT
n = PV / RT
n = (0.967 * 0.812) / (0.082 * 303.15)
n = 0.7852 / 24.8583
n = 0.0315 moles
Number of moles = mass / molarmass
Molarmass = mass / number of moles
Molar mass = 8.02 / 0.0315
Molar mass = 254.60g/mol
The molar mass of the gas is 254.60g/mol
Answer:
1- d
2- a
3- d
4- b
Step-by-step explanation: