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algol13
3 years ago
11

29 Positrons and beta particles have(1) the same charge and the same mass

Chemistry
1 answer:
Rama09 [41]3 years ago
8 0
Usually the beta particles are electrons with negative charge. And positrons are with positive charge. So they have the same mass and different charges. The answer is (3).
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An atom has 16 protons and 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.
uysha [10]
<span>An atom has 16 protons and 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.
Question 8 options:

A.33Cl  This would be correct.

B.32S

C.33S

D.32Cl


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7 0
3 years ago
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You need to make 25 microliters of a 3M NaOh solution for a test reagent. Your laboratory routinely stocks 500 milliliters of a
MrRissso [65]

Answer:

0.0075 milliliters (7.5 microliters) will be taken from the stock solution and then diluted with 0.0249925 milliliters (24.9925 microliters) of water to make 0.025 milliliters (25 microliters) of NaOH solution.

Explanation:

This is a problem of dilution using the equation:

<em>initial concentration x initial volume = final concentration x final volume.</em>

The final volume to be prepared is 25 microliters.

The final concentration to be prepared is 3 M.

The initial volume to be taken is not known yet.

The initial concentration is 10 M.

Now, let's substitute these parameters into the the equation above.

10 x initial volume = 3 x 25

Initial volume = 3 x 25/10

     = 7.5 microliters

Note that: 1 microliter = 0.001 milliliters

Hence,

7.5 microliters = 0.0075 milliliters

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8 0
2 years ago
PLEASE HELP!
castortr0y [4]

Answer:

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7 0
3 years ago
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The subatomic particles found in the nucleus are
sattari [20]
C.) protons , the nucleus contains 2 subatomic particles , one protons & neutrons ( protons have a + charge & neutrons have no electrical charge
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2 years ago
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If 1.8 L of water is added to 2.5L of a 7.0 Molarity
liq [111]

Answer:

4.1 mol·L⁻¹

Explanation:

You are diluting the solution with water, so you can use the dilution formula

c₁V₁ = c₂V₂     Divide each side by V₂

 c₂ = c₁ × V₁/V₂

Data:

c₁ = 7.0 mol·L⁻¹; V₁ = 2.5 L

Water added = 1.5 L

Calculations:

(a) <em>New volume </em>

V₂ = 2.5 L + 1.8 L

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(b) <em>New concentration </em>

c₂ = 7.0 × 2.5/4.3

    = 7.0 × 0.581

    = 4.1 mol·L⁻¹

6 0
3 years ago
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