Answer:
0.643 mol.
Explanation:
- We can use the general law of ideal gas: <em>PV = nRT.</em>
where, P is the pressure of the gas in atm (P = 4.0 atm).
V is the volume of the gas in L (V = 4000 mL = 4.0 L).
n is the no. of moles of the gas in mol (n = ??? mol).
R is the general gas constant (R = 0.0821 L.atm/mol.K),
T is the temperature of the gas in K (T = 30ºC + 273 = 303 K).
<em>∴ n = PV/RT </em>= (4.0 atm)(4.0 L)/(0.0821 L.atm/mol.K)(303 K) = <em>0.643 mol.</em>
Answer:
The molarity is 0,35M
Explanation:
The molartity is moles of compound in 1 liter of solution :
20 L----------7moles compound
1 L..-----------x= (1L x7 moles compound )/20L= 0,35 moles compound--> 0,35M
Specific heat is a constant that tells how many energies needed to increase the temperature of a mass of a substance. A substance with low specific heat will be easier to change to hot or cold.
The formula would be:
<span>Q=C * m *ΔT
</span>C= Q/ (m *ΔT)
C= 47J/10.2g(24.6-13°C)
C= 0.397 J/g°C
Answer:
the description of a mineral species usually includes its common physical properties such as habit, hardness, lustre, diaphaneity, colour, streak, tenacity, cleavage, fracture, parting, specific gravity, magnetism, fluorescence, radioactivity, as well as its taste or smell and its reaction to acid.