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iren2701 [21]
3 years ago
7

Who turned the ragged Continental Army into a more efficient fighting force?

Chemistry
1 answer:
Goshia [24]3 years ago
8 0
Von Steuben turned the ragged Continental Army into a more effective fighting force by drilling and teaching the army discipline
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HELP!!!!!!!!! Match the term with the example that shows its definition.
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Compressibility - A

Flammability - B

Heat of Combustion - C

Reactivity - D

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Which statement is correct? (
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A is correct. If an atom has more protons than electrons it is positively charged, if more electrons than protons it is negatively charged. An equal number of each will make it neutral
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When you test starch with Barfoed’s reagent, what would be the answer, positive or negative?
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A chemical compound has a molecular weight of 89.05 g/mole. 1.400 grams of this compound underwent complete combustion under con
Nataly_w [17]

Answer:

\Delta _{comb}H=-2,265\frac{kJ}{mol}

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:

Q _{comb}=-C_{calorimeter}\Delta T_{calorimeter}

In such a way, we can compute the total released heat due to the combustion considering the calorimeter specific heat and the temperature raise:

Q _{comb}=-2980\frac{J}{\°C} *11.95\°C\\\\Q _{comb}=-35,611J

Next, we compute the molar heat of combustion of the compound by dividing by the moles, considering 1.400 g were combusted:

n=1.400g*\frac{1mol}{89.05g} =0.01572mol

Thus, we obtain:

\Delta _{comb}H=\frac{Q_{comb}}{n}=\frac{-35,611J}{0.01572mol}  \\\\\Delta _{comb}H=-2,265,331\frac{J}{mol}*\frac{1kJ}{1000J}  \\\\\Delta _{comb}H=-2,265\frac{kJ}{mol}

Best regards!

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Which of the following is the same as a beta particle?
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