Answer:
Explanation:
The formula relating the mass m of a sample and the heat q to vaporize it is
q = mL, where L is the latent heat of vaporization.
![\begin{array}{rcl}2000 \times 10^{3} \text{ J} & = & m \times \dfrac{2.25 \times 10^{6} \text{ J}}{\text{1 kg}}\\\\m & = & \dfrac{2000 \times \times 10^{3}\text{ kg}}{2.25 \times 10^{6}}\\ & = & \text{0.889 kg}\\\\ & = & \text{889 g}\\\end{array}\\\text{The mass of water is $\boxed{\textbf{889 g}}$}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Brcl%7D2000%20%5Ctimes%2010%5E%7B3%7D%20%5Ctext%7B%20J%7D%20%26%20%3D%20%26%20m%20%5Ctimes%20%5Cdfrac%7B2.25%20%5Ctimes%2010%5E%7B6%7D%20%5Ctext%7B%20J%7D%7D%7B%5Ctext%7B1%20kg%7D%7D%5C%5C%5C%5Cm%20%26%20%3D%20%26%20%5Cdfrac%7B2000%20%5Ctimes%20%5Ctimes%2010%5E%7B3%7D%5Ctext%7B%20kg%7D%7D%7B2.25%20%5Ctimes%2010%5E%7B6%7D%7D%5C%5C%20%26%20%3D%20%26%20%5Ctext%7B0.889%20kg%7D%5C%5C%5C%5C%20%26%20%3D%20%26%20%5Ctext%7B889%20g%7D%5C%5C%5Cend%7Barray%7D%5C%5C%5Ctext%7BThe%20mass%20of%20water%20is%20%24%5Cboxed%7B%5Ctextbf%7B889%20g%7D%7D%24%7D)
Religion and science are fundamentally incompatible. They disagree profoundly on how we obtain knowledge of the world. Science is based observation and reasoning from observation. Religion assumes that human beings can access a deeper level of information that is not available by either observation or reason.
An endothermic chemical reactions products tend to have a higher potential energy than the reactants. Thus making the /\ H positive, not negative.
Answer is: <span>the molarity of this glucose solution is 0.278 M.
m</span>(C₆H₁₂O₆<span>) = 5.10 g.
n</span>(C₆H₁₂O₆) = m(C₆H₁₂O₆) ÷ M(C₆H₁₂O₆<span>) .
</span>n(C₆H₁₂O₆) = 5.10 g ÷ 180.156 g/mol.
n(C₆H₁₂O₆<span>) = 0.028 mol.
</span>V(solution) = 100.5 mL ÷ 1000 mL/L.
V(solution) = 0.1005 L.
c(C₆H₁₂O₆) = n(C₆H₁₂O₆) ÷ V(solution).
c(C₆H₁₂O₆) = 0.028 mol ÷ 0.1005 L.
c(C₆H₁₂O₆<span>) = 0.278 mol/L.</span>
Answer:
375.2 kJ
Explanation:
- H₂(g) +F₂(g) → 2HF(g) +536kJ
The information the equation above provides lets us know that when 2 mol of hydrogen fluoride (HF) are produced, 536 kJ of energy (as heat) is produced.
We can then <u>state a rule of three</u>:
And <u>solve for X</u>:
- X = 1.4 mol * 536 kJ / 2 mol