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Natasha2012 [34]
3 years ago
10

How many neutrons are present in an atom with atomic number 9 and mass number 19?​

Chemistry
2 answers:
katovenus [111]3 years ago
8 0
10 what Eddie said is correct
Kaylis [27]3 years ago
5 0

Answer:

10 neutrons

Explanation:

N=Z-A ie. number of neutrons=mass number-atomic number

N=19-9=10

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How come when i drink red bull it doesn’t give me wings? help asap
harina [27]

Explanation:

Because it’s a energy drink but does have high sugar additives.

4 0
3 years ago
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As you decreased the volume of the chamber, what effect did this change have on the frequency of collisions between
weeeeeb [17]

Answer: increase number of collisions

Explanation:

Decreasing the volume increases the likelihood of particles interacting more often.

8 0
3 years ago
If the enantiomeric excess of a mixture is 81 %, what are the percent compositions of the major and minor enantiomer?
Debora [2.8K]

Answer:

major enantiomer = 90.5 %

minor enantiomer = 9.5 %

Explanation:

Assuming that the  major isomer is in excess;

From, ee/2 + 50

ee = enantiomeric excess = 81%

%  major =81/2 + 50 = 90.5 %

%  minor = 100% - 90.5 %

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8 0
3 years ago
A sample of a certain material has a mass of 2.03 x 10-3 g. calculate the volume of the sample, given the density is 9.133 x 10-
Vsevolod [243]

Mass of a sample = M = 2.03 x 10-3 g

Density of a sample = D = 9.133 x 10-1 g/cm3

Volume of the sample = ?

By using the formula = D = M / V

V = M / D

Putting the values of density and mass of the sample

V = 0.00203/0.9133 = 0.0022cm3

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4 0
3 years ago
An unknown element is a mixture of
seropon [69]

Answer:

10.13086%

Explanation:

129y + 132(1-y) = 129.91

129y + 132 - 132y = 129.91

-3y = -2.09

y = 0.69666 (5 s.f.)

% abundance of 132X = 100% - (129×0.69666)%

                                    = 100% - 89.86914%

                                    = 10.13086%

                                    = 10.1% (3 significant figures)

*y is just a variable for the equation

8 0
3 years ago
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