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LenKa [72]
3 years ago
5

Which of the following processes are physical changes?

Chemistry
2 answers:
lubasha [3.4K]3 years ago
8 0
C) cutting a snowflake out paper
because someone has to physically cut the paper into a snowflake
Stolb23 [73]3 years ago
7 0
C) and d) are physical changes while b) is chemical
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#1.Which of the following best identifies base 1? A) purine. B) pyrimidine. C) cytosine. D) nucleotide. #2. Which of the followi
alex41 [277]
Here are the list of nucleo bases : adenine , Thymine, Guanine , Cytosine

Adenine pairs with Thymine, and Guanine pairs with Cytosine

Adenine + Guanine = Purine
Thymine + Cytosine = Pyrimidine

So the answer for number 1 will be : Purine, since Adenine is not the choice

And the answer for number 2 is Guanine

hope this helps

 


6 0
3 years ago
Five physical properties of ionic compounds
ipn [44]

Answer:

what is ionic? Is it iron

Explanation:

4 0
3 years ago
How much heat is necessary to raise the temperature of a 15.0 g metal from 15.0 C to 25.0 C if the specific heat of that metal i
Bumek [7]

The solution would be like this for this specific problem:

<span><span>
E</span>=</span><span>mc</span>ΔT<span> <span>
= (</span>15<span> g</span><span>)(</span>1.91<span> <span>J<span><span>g∘</span>C</span></span>)(</span>25<span><span> ∘</span>C</span>−15<span><span> ∘</span>C</span><span>)
</span></span>= 28.65 * 10
= 286.5

<span>

I hope this helps and if you have any further questions, please don’t hesitate to ask again. </span>

5 0
3 years ago
I want to balance S+O2 = SO3
Gre4nikov [31]

Answer:

2S +3O2 =2SO3

Explanation:

2 at the front of sulphur is to equalize the 2 put in SO3.

7 0
3 years ago
Read 2 more answers
What is the difference between mass and weight
ololo11 [35]
Mass<span> is the amount of matter in an object and </span>weight<span> is the measurement of the gravitational pull on an object. The </span>mass <span>of an object is the same no matter where it is, but the </span>weight <span>of an object changes with the location of that object.</span>
7 0
4 years ago
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