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vazorg [7]
3 years ago
5

There are two suspects in a shooting investigation. Bullets are recovered from the crime scene. Both suspects own guns, and thes

e guns have been seized by the police. How will the investigators check to see if one of these guns fired the found bullets?
Chemistry
1 answer:
Gwar [14]3 years ago
7 0

Answer:

They can check if one of the bullets is gone if the gun was fully loaded or they can see if there is any particles of gun powder on the gun. I may be wrong.

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PLEASE HELP WILL GIVE 20PTS AND WILL MARK BRAINLIEST FOR RIGHT ANSWER!!!
Marysya12 [62]

Answer:

C) 0.457

Explanation:

The ratio between O2 and H2O is 1:2 according to the balanced equation. You can find how many moles is O2 by : 5.12/22.4 = 0.22857 ( 1 mole = 22.4 litters)

Moles of H2O will be 0.22857 * 2 = 0.457142.

Therefore answer C)

7 0
3 years ago
What is the pH of a solution with a concentration of 7.6 × 10–7 M H3O+?
Setler [38]

Answer:

Ph = 6.12....

here ya go

Explanation:

-

7 0
3 years ago
Need help fast!!
stepan [7]

Answer:

The answer is "5.18 ".

Explanation:

It's a question of chemistry. Therefore, the following solution is provided:

We will first determine the solution's pOH. The following can possible:

The concentration of Hydroxide ion [OH^{-}] = 1.5\times 10^{-9}\ M

pOH =?\\\\pOH = -\log [OH^{-}]\\\\pOH = -\log 1.5\times 10^{-9}\\\\pOH = 8.82\\\\

Furthermore, the pH of the solution shall be established. It was provided as follows:

pOH = 8.82\\\\pH =?\\\\pH + pOH = 14\\\\pH + 8.82 = 14\\\\

When collecting all the like terms:

pH = 14 -8.82\\\\pH = 5.18

Therefore, the solution of pH is 5.18.

8 0
3 years ago
The number of mgs of Cl- in a 750 mL bottle of mineral water is 21
love history [14]

Answer:

For instance, one liter of Mendocino mineral water contains more than 30% of the Ca2+ and Mg2+ DRIs in adult women, and 1 liter of Vichy .

Explanation:

Please give thanks to all my answers and please mark as brilliant and please follow me

3 0
3 years ago
Classify these substances. More than one answer may apply in each case.
enyata [817]

Answer: H_2 :  Pure substance, Element

O_2 : Pure substance , Element

H_2O:  Pure substance, Compound

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: H-2 and O_2

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: H_2O

Heterogeneous Mixture : Mixture that has its different components mixed unevenly within the substance . Example: Air

Homogeneous Mixture : Mixture that has its different components mixed evenly within the substance. Example: sugar dissolved in water

3 0
4 years ago
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