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skelet666 [1.2K]
3 years ago
9

办理教留服学位学历认证Q/微29304199美国堪萨斯KU毕业证文凭学位证书offer操办堪萨斯留信认证成绩单

Chemistry
1 answer:
astra-53 [7]3 years ago
8 0

办理教留服学位学历认证Q/微29304199美国堪萨斯KU毕业证文凭学位证书offer操办堪萨斯留信认证成绩单 what欧式

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What are two examples of a chemical change
lyudmila [28]

Answer:

1.Cooking an egg

2. Burning wood

Hope it helps :)

6 0
3 years ago
Read 2 more answers
If you had 15 molecules of H2 and an unlimited supply of N2, how many
Masja [62]

Answer:

10 molecules of NH₃.

Explanation:

N₂ + 3H₂ --> 2NH₃

As the N₂ supply is unlimited, what we need to do to solve this problem is <u>convert molecules of H₂ into molecules of NH₃</u>. To do so we use the <em>stoichiometric coefficients</em> of the balanced reaction:

  • 15 molecules H₂ * \frac{2moleculesNH_3}{3moleculesH_2} = 10 molecules NH₃

10 NH₃ molecules could be prepared from 15 molecules of H₂ and unlimited N₂.  

8 0
3 years ago
If you have 5.42 x 1024 aluminum atoms, approximately how many moles is that
sattari [20]

Answer:

<h2>9.00 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{5.42 \times  {10}^{24} }{6.02 \times {10}^{23} }  \\  = 9.0033

We have the final answer as

<h3>9.00 moles</h3>

Hope this helps you

4 0
3 years ago
In an experiment, you use a ruler to measure two plants. What can you do with the data you gather?
Pepsi [2]
C. is the best choice
5 0
3 years ago
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An equation that shows only the chemical formulas without
Ivahew [28]

Answer: skeleton equation

Explanation:

7 0
3 years ago
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