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mina [271]
3 years ago
12

Evidence of a chemical reaction includes all of the following EXCEPT: A. baking soda and vinegar release gas bubbles B. while ch

ewing a cookie, it becomes smaller pieces so you can swallow it C. heat is generated after mixing 2 chemicals
Chemistry
1 answer:
Bumek [7]3 years ago
3 0

Answer:

B.

Explanation:

Chemical reaction have to have either a temp change, formation of precipitate, formation of gas, or color change.

- Hope that helps! Please let me know if you need a further explanation.

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Name one manufactured device or natural phenomenon that emits electromagnetic radiation in each of the following wavelengths: ra
Bas_tet [7]
Radio - Radio station transmits radio wavelength which is received by the
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Microwaves - Microwave Oven to heat up foods. </span>

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<span>Visible light - Sunlight or Light Bulbs </span>

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<span>X-rays - Chest X-ray machines, Backscatter Xray (body scanner in airport security)
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Gamma rays - Gamma rays<span> Medical Equipment which are used to kill cancer cells, to sterilize medical </span>equipment<span> </span>
7 0
3 years ago
Suggest two reasons why the noble gases become less ideal in their behavior down the group from helium to xenon.
katrin2010 [14]
Here is your answer !!! Last day we have solve this question and the answer is easy to get in mind

6 0
3 years ago
A collection of coins contains 15 pennies, 14 dimes and 6 quarters. What is the percentage of pennies in the collection?
pychu [463]

Answer:

42.9%

Explanation:

the total number of coins is 15+14+6 = 35

so to find the % of pennies, divide the number of pennies by the total number of coins and times it all by 100

15/35 x 100 = 42.9%

8 0
3 years ago
Why is it that when you heat up a small portion of mac n cheese, it gets warmed up quickly and soon burnt. I heated up my bowl b
sergeinik [125]

Answer:

well tbh it's just the microwave doing its job heating up your Mac n cheese. But while doing so the Mac n cheese absorbs a lot of heat and then releases it by popping.

8 0
3 years ago
Read 2 more answers
A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution. 
harina [27]
B. concentrated
A. is incorrect because it COULD be saturated. C. is incorrect because a large amount of salt is concentrated into a small amount of water, so it can't be diluted, relatively. D. is incorrect because it does not describe a solution's molality or molarity.
3 0
3 years ago
Read 2 more answers
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