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Alisiya [41]
3 years ago
13

On December 25th, 1776, General George Washington’s Continental Army crossed the Delaware River and defeated troops of Hessians

(German soldiers fighting for the British). Here’s a fictionalized account of that historical event: “While our general stood bravely in the Christmas Day cold, I shivered from more than just the icy wind. Beyond the river were enemy soldiers from the most obscure corners of Europe. I could barely fathom the unknown monsters ahead.” How did the fiction author make the factual account more exciting? A The author altered the chronology of the historical events. B The author omitted the factual details, because readers already know them. C The author enhanced the drama by altering the description of the enemy troops. D The author created a sense of danger by changing the setting of the event.
Chemistry
1 answer:
m_a_m_a [10]3 years ago
7 0

Answer:the answer is C

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What is a resistor that can stop most
aev [14]

Answer: a) current

Explanation:

4 0
3 years ago
The combustion of Ibuprofen C13H18O2 produces water and carbon
prohojiy [21]

Answer:

277.7 g of CO2

Explanation:

Equation of reaction

C13H18O2 + 11O2 ---> 13CO2 + 9H2O

From the equation of reaction

1 mole of ibuprofen produces 13 moles of CO2

Molar mass of ibuprofen is 206g

Molar mass of CO2 is 44g

13 moles of CO2 weighs 572g

Therefore, 100g of ibuprofen will produce (100×572)/206 of CO2

= 277.7g

6 0
3 years ago
A flexible container at an initial volume of 8.15 l contains 6.51 mol of gas. more gas is then added to the container until it r
kirill [66]
<span>A </span>flexible container<span> at an </span>initial volume<span> of 7.14 </span>L contains<span> 7.51 </span>mol<span> of </span>gas<span>. </span>More gas<span> is</span>then added<span> to the </span>container until<span> it </span>reaches<span> a </span>final volume<span> of 17.7 </span>L<span>. </span>Assuming<span> the </span>pressure<span> and</span>temperature<span> of the </span>gas remain constant<span>, </span>calculate<span> the </span>number<span> of </span>moles<span> of </span>gas added<span> to the </span>container<span>.</span>
3 0
3 years ago
How many moles are in 454 grams of dinitrogen trioxide (N2O3) ?
balu736 [363]

Answer:

5.97 mol

Explanation:

To find the number of moles when given the mass of a substance, we divide the mass of the sample by its molar mass.

so, we get,

nN203 = 454 g / 76.01 g /mol

= 5.97 mol

6 0
3 years ago
A 63 gram piece of magnesium absorbs 6689 joules of heat. The final temperature is 663 degrees Celsius. What was the initial tem
Gemiola [76]

Answer:

559^{\circ}C

Explanation:

When heat is supplied to a substance, the temperature of the substance increases according to:

Q=m C (T_f-T_i)

where

Q is the amount of heat supplied

m is the mass of the substance

C is the specific heat capacity of the substance

T_i is the initial temperature

T_f is the final temperature

For the sample of magnesium in this problem, we have:

m = 63 g is the mass

Q = 6689 J is the hear supplied

C = 1.023 J/gC is the specific heat capacity

T_f=663^{\circ}C is the final temperature

Solving the formula for T_i, we find the final temperature:

T_i = T_f-\frac{Q}{mC}=663-\frac{6689}{(63)(1.023)}=559^{\circ}C

6 0
3 years ago
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