Heat is given by multiplying the specific heat capacity of a substance by mass and the change in temperature. The heat capacity of water is Approximately 4184 J/K/C.
Therefore, heat = mc0 mass in kg
= (422/1000) × 4184 × (100-23.5)
= 135072.072 J
Latent heat of vaporization is 2260 kJ/kg
Thus the heat will be 0.422 × 2260000 = 953720 J
Heat to raise steam from 100 to 150
2000 × 0.422 ×50 = 42200 J
Thus the heat required is (135072.072 + 953720 + 42200) = 1330992.07 Joules or 1330 kilo joules
Answer:
BHx, x=3
CHx, x=4
NHx, x=3
CH2Clx, x=2
Explanation:
We have to know that the value of x must depend on the valency of the central atom. If we look at each of the species;
Boron has a common valency of 3
Carbon has a common valency of 4
Nitrogen has a common valency of 3
The valency of each elements will determine the most likely value of x as outlined in the answer above.
Answer:
C. 81 degrees Celsius
Explanation:
- To solve this problem, we can use the relation:
<em>Q = m.c.ΔT,</em>
where, Q is the amount of heat released from water (Q = - 1200 J).
m is the mass of the water (m = 20.0 g).
c is the specific heat capacity of water (c of water = 4.186 J/g.°C).
ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = final T - 95.0°C).
<em>∵ Q = m.c.ΔT</em>
∴ (- 1200 J) = (20.0 g)(4.186 J/g.°C)(final T - 95.0°C ).
(- 1200 J) = 83.72 final T - 7953.
∴ final T = (- 1200 J + 7953)/83.72 = 80.67 °C ≅ 81.0 °C.
<em>So, the right choice is: C. 81 degrees Celsius
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Answer : The molar mass of protein is, 
Explanation :
Formula used :
where,
= osmotic pressure = 0.138 atm
C = concentration
R = solution constant = 0.0821 L.atm/mol.K
T = temperature = 
w = mass of protein subunit = 0.155 g
M = molar mass of protein subunit = ?
V = volume of solution = 2.00 mL
Now put all the given values in the above formula, we get:
Therefore, the molar mass of protein is,
X will be in group 5, since if you exchange the valencies of Na with any element on group 5, you will get Na3X
