Chemistry High School

1. Suppose that there were two isotopes of Sodium.
28% of the naturally occurring sodium atoms had a
mass of 22, and 72% atoms had a mass of 23. What
would the average atomic weight of sodium be?

Answers

Answer 1

Answer: C. The university surveys 600 randomly selected students who attend the university. Correct

Explanation:

Answer 2

22.72 is the average atomic weight of sodium.

What are isotopes?

Isotopes are different versions of a specific element.

1st isotopes of 22u = 28%

2nd isotopes of 23u = 72%

The average atomic weight of sodium be=

22 x 28 + 23 x72

=2272/100

=22.72

Hence, 22.72 is the average atomic weight of sodium.

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Related Questions

An atom of hydrogen loses its electron. What is its charge

Answers

Answer:

When an atom of hydrogen loses its electron it becomes positively charged.

Hope it will help you........

Final Answer: +1

Explanation/Reasoning:

Because hydrogen is an atom (not an ion), you'll write it as H (not H+). Hydrogen (H) has one proton and one electron, so if it loses its electron, it will only have one proton. Therefore, it becomes an ion of H+. This means that the charge will be +1.

~I hope I helped you :)~

A green pea plant (Gg) is crossed with a yellow pea plant (gg). What is the probability that the offspring will be heterozygous?
A.25%
B.50%
C.75%
D.100%

Answers

Answer:

50 percent

Explanation:

G g

g Gg gg

g Gg gg

since one of the plants are already heterozygous, only half will be heterozygous since the other plant is homzygous

There is 50% probability that the offspring will be heterozygous.

What is heterozygous?

At a given gene locus, the existence of two different  alleles. One normal allele and one mutant allele, or two separate mutated alleles, can make up a heterozygous genotype (compound heterozygote).

what is allele?

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome.

so, if green pea plant (Gg) is crossed with a yellow pea plant (gg), there will be 50% probability that the offspring will be heterozygous, we can find it by making punnett square so here is the solution

Hence, the correct option is B i.e. 50%

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