Answer:
The energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.
Explanation:
There's no diagram....but I kinda figured it from the description.
Answer: -
219.375 g of NaCl is present in a 0.75 M solution with a volume of 500.0 milliliter
Explanation: -
Volume of NaCl solution = 500 mL
= 500/1000 = 0.5 L
Strength of NaCl solution = 0.75 M
Number of moles of NaCl = Strength of NaCl x Volume of NaCl
= 0.75 M x 0.5 L
= 3.75 mol
Molar mass of NaCl = 23 x 1 + 35.5 x 1
= 58.5 g / mol
Mass of NaCl = Molar mass x number of moles
= 58.5 g / mol x 3.75 mol
= 219.375 g
First figure out how many grams must freeze and then convert the grams to moles.
<span>Hf = -334 J/g. Convert this to KJ/g by dividing by 1000. (There are 1000 Joules in a kJ). </span>
<span>Hf = -334 J/g ÷ 1000 J/kj = -0.334 kJ/g </span>
<span>Now, divide 100 kJ by -0.334 kJ/g (see how the units are lining up?) </span>
<span>100 kJ ÷ -0.334 kJ/g = 299 g </span>
<span>Now convert this to moles by dividing by the molecular weight of water (18.0g/mole). </span>
<span>299 ÷ 18.0 = 16.6 moles </span>
Answer: The answer is D
Explanation:
In a chemical equilibrium, the forward and reverse reactions occur at equal rates, and the concentrations of products and reactants remain constant. A catalyst speeds up the rate of a chemical reaction, but has no effect upon the equilibrium position for that reaction.
The answer to this question is atomic number