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3 years ago

What do you read the arrow in a chemical equation as meaning?

Chemistry

1 answer:

Pani-rosa [81]3 years ago

6 0

A product...............................................................

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What are solenoids......????

MrRissso [65]

Yo sup??

Solenoids are a kind of bar magnet.

The have low coercivity and low retentivity

The are made by taking a soft iron core and covering it with a coil.

Hope this helps.

6 0

3 years ago

Read 2 more answers

1. The answer to the research question is the...

katovenus [111]

Answer:

1. A claim

2. B evidence

8 0

4 years ago

What are two observations that supported the theory of continental drift?

madam [21]

Answer: There are fossils found on either side of different continents and the continents look as though some are puzzle pieces that fit together.

4 0

3 years ago

Please help! Willing to offer Brainliest. :D

Luda [366]

Answer:

The correct answer is beta decay

Explanation:

When a beta particle is emitted from a radioactive atom,at that time the daughter atom that is produced have atomic mass 1 unit more than that of its parental atom.

In the given reaction a beta particle is emitted from the carbon atom resulting in the formation nitrogen atom,The atomic mass of nitrogen atom is 7dalton which is one unit more than the atomic mass of carbon that is 6 dalton.

4 0

3 years ago

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u () and 64.9278 u (). The atomic mass of copper is 63

natta225 [31]

Answer:

The abundance of first isotope is 69.15 %

The abundance of second isotope is 30.85 %

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

For first isotope:

% = x %

Mass = 62.9296 u

For second isotope:

% = 100 - x

Mass = 64.9278 u

Given, Average Mass = 63.546 u

Thus,

$63.546=\frac{x}{100}\times {62.9296}+\frac{100-x}{100}\times {64.9278}$

Solving for x, we get that:

x = 69.15 %

<u>The abundance of first isotope is 69.15 %</u>

<u>The abundance of second isotope is 100 - 69.15 % = 30.85 %</u>

4 0

4 years ago