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SpyIntel [72]
4 years ago
12

Which changes are evidence of a chemical reaction? a beaker of water becomes hot to the touch upon?

Chemistry
1 answer:
Arturiano [62]4 years ago
4 0
Any change in temperature or new substance formed is evidence of a chemical reaction, this includes heat, gas or crystallization.
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A(n) _______________ is a negatively charged ion
siniylev [52]
An anion is a negatively charged ion. 

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3 0
3 years ago
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Which atom is most likely to partake in chemical bonding given the number of valence electrons?
timama [110]

Answer:

D

Explanation:

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6 0
3 years ago
Draw the major organic product for the reaction of 1-phenylpropan-1-one with the provided phosphonium ylide.
prohojiy [21]

Answer:

2-methylene propylbenzene

Explanation:

The Wittig Reaction is a reaction that converts aldehydes and ketones into alkenes through reaction with a phosphorus ylide.

The ketone in this case is 1-phenylpropan-1-one. The provided phosphonium ylide is shown in the image attached. The reaction involves;

i) alkylation  

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The product of the major organic product of the reaction is 2-methylene propylbenzene.

4 0
3 years ago
Find the number of moles in 1.00 x 1023 atoms of chromium.
IRISSAK [1]

Answer:

<h2>0.17 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

We have

n =  \frac{1.00 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{1}{6.02}  \\   = 0.166112

We have the final answer as

<h3>0.17 moles</h3>

Hope this helps you

8 0
3 years ago
a 1.00litre vessel contains 0.215 mole of nitrogen gas and 0.0118 mole of hydrogen gas at 25°C. determine the partial pressure o
stepladder [879]

Answer:

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8 0
2 years ago
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