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4 years ago

HURRY This scientist proposed that atoms have a nucleus. Thomson

1 answer:

4 0

it was earnest rutherford he did the gold foil experiment where he shot alpha particles at gold foil that was supposed to be about 1 atom thick. He expected all the atoms to pass straight through but some bounced back, so he proposed that there was something small dense and positive in atoms aka the nucleus

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What is the electrical charge of an atom that has gained an electron

BARSIC [14]

An electron has a ( - ) charge and so if an atom gains one electron it gains a - charge

hope that helps

6 0

4 years ago

Ammonia and hydrogen fluoride both have unusually high boiling points due to

nexus9112 [7]

Answer:

C. hydrogen bonding

Explanation:

Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)

5 0

4 years ago

Calculate the number of joules released when 72.5 grams of water at 95.0 degrees Celsius cools to a final temperature of 28.0 de

Airida [17]

Water's specific heat capacity is 4200 J/Kg°C
95-28=67
72.5grams in kg is 0.0725kg
Energy = 67×0.0725×4200
Energy = 20,401.5 J or 20.4015 kJ

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3 years ago

Which factor decreases the rate of solution?

Rom4ik [11]

I am just answering so u can mark the other guy brainliest

4 0

3 years ago

Read 2 more answers

In Part A, we saw that the theoretical yield of aluminum oxide is 0.700 mol . Calculate the percent yield if the actual yield of

s2008m [1.1K]

Considering the definition of percent yield, the percent yield is 76%.

<h3>Percent yield</h3>

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

$percent yield=\frac{actual yield}{theorical yield}x100$

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

<h3>Percent yield in this case</h3>

In this case, you know:

actual yield= 0.532 moles
theorical yield= 0.700 moles

Replacing in the definition of percent yield:

$percent yield=\frac{0.532 moles}{0.700 moles}x100$

Solving:

<u><em>percent yield= 76%</em></u>

Finally, the percent yield is 76%.

Learn more about percent yield:

brainly.com/question/14408642

#SPJ1

3 0

2 years ago