The number of moles of a gas if it occupy a volume of 4dm at 10 atm and - 200 c is 6.67 moles
calculation
by use of ideal gas equation
that is PV =nRT
where P(pressure) = 10 atm
V( volume) = 4dm^3 = 4L
n(number of moles) =?
R(gas constant) = 0.0821 L.atm/mol.K
T = -200 +273 = 73 K
make n the formula of the subject n = PV/RT
n is therefore = (10 atm x 4l)/(0.0821 L.atm/mol.K x 73 K) = 6.67 moles
The only thing you can do is to convert the pressure unit fo kPa.
The conversion factor is:
1 atm = 760.0 mmHg = 101.325 kPa
=> 1 = 101.325kPa / 760.0mmHg
=> 890.0 mmHg * 101.325 kPa / 760.0 mmHg = 118.657 kPa.
With this value you can do any calculation now in kPa.
Also if you have any other value of pressure in mmHg you just use the same factor: <span>1 = 101.325kPa / 760.0mmHg.</span>
The granite loses 1.53 × 10⁸ J of heat.
The formula for the heat (<em>q</em>) transferred is
<em>q = mC</em>Δ<em>T
</em>
I shall assume that the specific heat capacity of granite is 0.790 J·°C⁻¹g⁻¹.
<em>m</em> = 3.580 × 10⁶ g; Δ<em>T</em> = <em>T</em>_f – <em>T</em>_i = -12.9 °C - 41.2 °C = -54.1 °C
∴ <em>q</em> = 3.580 × 10⁶ g × 0.790 J·°C⁻¹g⁻¹ × (-54.1 °C) = -1.53 × 10⁸ J
The granite block loses 1.53 × 10⁸ J.
I think these are the correct answers! I'm currently rechecking them and thought I would post this while I recheck the answers so that way you at least have something to go off of.
Na^+1 and o^-2:
Anion name - Oxide
Compound formula - Nao
Compound name - dioxygen
Na^+1 and N^-3:
Cation name - Sodium
Anion name - Nitride
Compound formula - Na3N (3 is in subscript)
Compound name - Sodium nitride
K^+1 and Br^1:
Cation name - Potassium
Anion name - Bromide
Compound formula - KBr
Compound name - Potassium Bromide
K^+1 and N^-3:
Cation name - Potassium
Anion name - Nitride
Compound formula - KNO2 (2 is in subscript)
Compound name - Potassium Nitride
Li^+1 and I^-1:
Cation name - Lithium
Anion name - lodide
Compound formula - LiI
Compound name - Lithium iodide
Li^+1 and O^-2:
Cation name - Lithium
Anion name - Oxide
Compound formula - Li2O (2 is in subscript)
Compound name - Lithium oxide
Li^+1 and N^-3:
Cation name - Lithium
Anion name - Nitride
Compound formula - Li3N
Compound name - Lithium Nitride
Mg^+2 and Cl^-1
Cation name - Magnesium
Anion name - Dichloride
Compound formula - MgCl2
Compound name - Magnesium dichloride
Answer:
2 :free energy
Explanation:
I hope it is fine answer for you ☺️☺️☺️