Answer:
(C) through the atmosphere
Explanation:
Hey! 1) Convection [Warm water is less dense, so it rises.] 2) Conduction [The metal skewer is heated by the fire, and it is directly touching your hand. The metal skewer transfers heat to your hand through conduction.] 3) Conduction [The rock is directly touching you, so it transfers heat to you through conduction.] 4) Convection [Convection causes weather systems because hot air sinks and cold air sinks] 5) Convection [The hot air rises because it is less dense while the cold air sinks because it is denser.] ~Hope this helped~
Dissolving 0.729 mol NaCl in 2530 mL of water yields a solution with 2.88M concentration.
Explanation:
The moles of NaCl given will be dissolved and volume will be made with given data will give molarity.
The units for molarity are moles/litre, so the volume given in ml will be converted to litres by dividing it with 1000.
data given:
number of moles of NaCl = 0.729 moles
volume of the solution = 2530 ml or 2.53 litre
To calculate the concentration of the solution the formula used is:
molarity = 
= 0.288 M
The concentration or molarity of the solution OF NaCl is 2.88M
Answer:
4367.72 mmHg
Explanation:
Given data:
Mass of hydrogen = 1 g
Mass of argon = 8 g
Volume of container = 3.0 L
Temperature = 27 °C = 27+ 273 = 300 K
Pressure of mixture = ?
Solution:
Moles of hydrogen:
Number of moles = mass / molar mass
Number of moles = 1 g/ 2 g/mol
Number of moles = 0.5 mol
Moles of argon:
Number of moles = mass / molar mass
Number of moles = 8 g/ 40 g/mol
Number of moles = 0.2 mol
Pressure of hydrogen:
PV = nRT
P = nRT/V
P = 0.5 mol ×0.0821 atm. L. mol⁻¹ .K⁻¹ × 300 K/ 3.0 L
P = 12.315 atm / 3.0
P = 4.105 atm
Pressure of argon:
PV = nRT
P = nRT/V
P = 0.2 mol ×0.0821 atm. L. mol⁻¹ .K⁻¹ × 300 K/ 3.0 L
P = 4.926 atm / 3.0
P = 1.642 atm
Total pressure:
T(total) = P(H₂) + P(Ar)
T(total) = 4.105 atm + 1.642 atm
T(total) = 5.747 atm
atm to mmHg:
5.747 × 760 = 4367.72 mmHg
