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nydimaria [60]
3 years ago
5

1.

Chemistry
2 answers:
Nata [24]3 years ago
8 0
Oregon trail would be the best answer
irga5000 [103]3 years ago
3 0

1: A. National Road

2: B. Mostly by barge across the Chesapeake and Ohio Canal

3: C. Wilderness Road

4: C. Transcontinental Railroad

5. C. Gila Trail


I took the quiz and I have confirmed that these are the correct answers, I hope this assists you.

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If one jellybean weighs 0.350g how many jelly beans are in 504g of jellybeans?
allsm [11]

Answer:

1440g

Explanation:

Divide 504g by 0.350g

4 0
3 years ago
Suppose a solution is prepared by dissolving 15.0 g NaOH in 0.150 L of 0.250 M nitric acid. What is the final concentration of O
Kipish [7]

Answer:

2.25 M is the final concentration of hydroxide ions ions in the solution after the reaction has gone to completion.

Explanation:

Moles of NaOH = \frac{15.0 g}{40 g/mol}=0.375 mol

Molarity of the nitric acid solution = 0.250 M

Volume of the nitric solution = 0.150 L

Moles of nitric acid = n

Molarity=\frac{Moles}{Volume(L)}

n=0.250 M\times 0.150 L=0.0375 mol

NaOH+HNO_3\rightarrow NaNO_3+H_2O

According to reaction, 1 mole of nitric acid recats with 1 mole of NaOH, then 0.0375 moles of nitric acid will react with :

\frac{1}{1}\times 0.0375 mol of NaOH

Moles of NaOH left unreacted  in the solution =

= 0.375 mol - 0.0375 mol = 0.3375 mol

NaOH(aq)\rightarrow Na^+(aq)+OH^-(aq)

1 mole of sodium hydroxide gives 1 mol of sodium ions and 1 mole of hydroxide ions.

Then 0.3375 moles of NaOH will give :

1\times 0.3375 moles=0.3375 mol of hydroxide ion

The molarity of hydroxide ion in solution ;

=\frac{0.3375 mol}{0.150 L}=2.25 M

2.25 M is the final concentration of hydroxide ions ions in the solution after the reaction has gone to completion.

3 0
3 years ago
Which of the following is the best description of the results of a chemical reaction?
dedylja [7]

Answer:

A, new substance is formed with different properties

Explanation:

5 0
3 years ago
Xác định nội năng chuẩn ΔU của phản ứng tổng hợp amoniac
Step2247 [10]

Explanation:

xác định nội năng chuẩn ΔU của phản ứng tổng hợp amoniac

ở 400 0 C, biết :

N 2(k) + 3H 2(k) = 2NH 3(k) ΔH 0 T = - 109,0 kJ

7 0
2 years ago
An aqueous solution that has a hydrogen ion concentration of 1.0 x 10^-8 mole per liter has a pH of
spin [16.1K]

Answer: 8, which is basic

Explanation: The hydrogen ion concentration is 1.0 x 10^-8 mole per liter. Using [H+] = 1.0 x 10 -(pH) the pH is 8. A pH above 7 is basic.

7 0
3 years ago
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