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zhuklara [117]
3 years ago
12

Select the letter of a category on which you should focus when proofreading.

Chemistry
1 answer:
oee [108]3 years ago
8 0
B. Who, what, when, where, why, and how. Those are the most important and key componants in a story.
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How many atoms of nitrogen and oxygen are present in a molecule of dinitrogen pentoxide?
Kitty [74]

Answer: 7

Explanation: oxygen has 5 atoms and nitrogen has 2. Put them together and you get 7

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Bronze is an alloy, which is what form of matter?
grandymaker [24]
It is a Compound. have a nice day
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What is the ph of a 0.027 M KOH solution?
Monica [59]
First you calculate the concentration of [OH⁻] in <span>solution :

POH  = - log [ OH</span>⁻]

POH = - log [ 0.027 ]

POH = 1.56

PH + POH = 14

PH + 1.56 = 14

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hope this helps!

8 0
3 years ago
A bottle containing 415 g of cleaning solution is used to clean hospital equipment. If the cleaning solution has a specific grav
neonofarm [45]

Answer: 483 mL of the cleaning solution are used to clean hospital equipment

Explanation:

The question requires us to calculate the volume, in mL, of solution is used to clean hospital equipment, given that 415g of this solution are used and the specific gravity of the solution is 0.860.

Measurements > Density

Specific gravity is defined as the ratio between the density of a given substance to the density of a reference material, such as water:

Specific\text{ gravity = }\frac{density\text{ of substance}}{density\text{ of reference substance}}

The density of a substance is defined as the ratio between the mass and the volume of this substance:

density=\frac{mass}{volume}

Considering the reference substance as water and its density as 1.00 g/mL, we can determine the density of the substance which specific gravity is 0.860:

0.860=\frac{density\text{ of substance}}{1.00g/mL}\rightarrow density\text{ of substance = 0.860g/mL}

Thus, taking water as the reference substance, we can say that the density of the cleaning solution is 0.860 g/mL.

Now that we know the density of the cleaning solution (0.860 g/mL) and the mass of solution that is used to clean hospital equipment (415g), we can calculate the volume of solution that is used to clean the equipment:

\begin{gathered} density=\frac{mass}{volume}\rightarrow volume=\frac{mass}{density} \\  \\ volume=\frac{415g}{0.860g/mL}=483mL \end{gathered}

Therefore, 483 mL of the cleaning solution are used to clean hospital equipment.

6 0
1 year ago
Hiya if you answr more than 5 = extra points please answer and least 3 lol and maybe explain how i can do it
Harrizon [31]

Answer:

copy and paste them into the search and all of the answers come up trust me

Explanation:

3 0
2 years ago
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