Answer:
70 amu
Explanation:
The average atomic mass of an element is calculated by first finding the products of the atomic masses of the isotopes of that element and their respective percent abundances. The second/last step is finding the sum of those products, applying significant figures rules throughout. In this case, you would do the following:
(69 x 60%) + (71 x 40%) = 70 amu (with significant figures rules applied)
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Answer:
A condensation reaction joins two larger molecules by splitting out a smaller molecule — usually water or ammonia — between them.
In an esterification reaction, an OH from the acid and an H from the alcohol form a molecule of water.
The larger parts join to form the ester.
Ethanol and butanoic acid react to form ethyl butanoate.
The balance is A Go check other answer I posted
The volume of 6.00g iron is 0.762 cm^3.
<em>Step 1</em>. Calculate the <em>density of Fe</em>
The <em>specific gravity</em> (SG) of a substance is the ratio of its density to the density of water at 4 °C.
SG = density of substance/density of water.
∴ 7.87 = density of iron/1.00 g·cm^(-3)
Density of Fe = 7.87 × 1.00 g·cm^(-3) = 7.87 g·cm^(-3)
<em>Step 2</em>. Calculate the <em>mass of Fe</em>
Volume of Fe = 6.00 g Fe × (1 cm^3 Fe/7.87 g Fe) = <em>0.762 cm^3</em>
Answer:
Explanation:
Hello!
In this case, for such calorimetry problem, we can notice that the combustion of the compound releases the heat which causes the increase of the temperature by 11.95 °C, it means that we can write:
In such a way, we can compute the total released heat due to the combustion considering the calorimeter specific heat and the temperature raise:
Next, we compute the molar heat of combustion of the compound by dividing by the moles, considering 1.400 g were combusted:
Thus, we obtain:
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