Answer:
-6300J
Explanation:
The quantity of heat required to raise the temperature of a substance per unit of mass could be written as:
Q = -m×C×ΔT
<em>Where Q is heat, m is mass of substance, C is specific capacity and ΔT is change in temperature</em>.
Replacing:
Q = -175g × 2.4J/gK × (38.6°C-23.7°C)
Q = -6258J ≡ <em>-6300J</em>
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B. They work against a strong gravitational force
Mass of chlorine = (given)
Molar mass of chlorine =
Now, number of moles is defined as the ratio of given mass in gram to the molar mass of the compound.
Number of moles =
Number of moles of chlorine =
=
Now, according to significant figure rules, the least number of significant figure in the question identifies the number of significant figures in the solution.
Thus, in question, both digit have four significant figures, therefore, the answer must be in four significant figures.
Hence, number of moles of chlorine =
Answer:
The plum pudding model would have to be true as well because it shows that electrons are scattered within an atom.
Explanation:
I took the test and got it right :)
The percent composition of a compound is calculated with the molecular formula: divide the mass of each element found in one mole of the compound by the total molar mass of the compound