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Dmitry [639]
3 years ago
11

What is the velocity of an car that travels 50 miles north, turns around and travels 50 miles south, in 5 hours? 2 mph south 5 m

ph south 25 mph north 0
Chemistry
2 answers:
Ugo [173]3 years ago
3 0
50 is it man i hope i help








nikklg [1K]3 years ago
3 0
The correct answer is 0, took the test and got this answer correct.
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In Chapter 1 of Astrobiology, A Very Short Introduction, the author talks about some properties of one element in particular tha
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Answer:

Carbon

Explanation:

Carbon has four electrons in its valence shell, so it generally shares it in a covalent bond. This element needs four electrons to be stable, so it can form single (such as the bond with hydrogen), double (such as the bond with oxygen) or triple bonds (such as the bond with nitrogen).

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What does every chemical reaction involve?
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breaking bonds in reactants and forming new bonds in products. Breaking bonds requires energy, and forming bonds releases energy.

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!!!10 POINTS!!! Which of these is an example of an engineering solution?
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Answer:

A

Explanation:

Because it will not cause much harm to the environment.

I hope it's right (best of luck).

8 0
3 years ago
A solution is made containing 4.6 g of sodium chloride per 250g of water.
lozanna [386]

Answer:

\large \boxed{1.81 \, \%}

Explanation:

\text{Mass percent} = \dfrac{\text{mass of solute} }{\text{mass of solution}} \times 100 \, \%

Data:

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Mass of water = 250    g

Calculations:

Mass of solution = mass of NaCl + mass of water = 4.6 g + 250 g = 254.6 g.

\text{\% m/m} = \dfrac{\text{4.6 g} }{\text{254.6 g}} \times 100 \, \% = \mathbf{1.81 \, \%}\\\\\text{The percent by mass of NaCl is $\large \boxed{\mathbf{1.81 \, \%}}$}

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3 years ago
A student made the Lewis dot diagram of a compound as shown.
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Answer:

the answer is number 2

Explanation:

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