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Black_prince [1.1K]
3 years ago
5

The beginning expansion of the big bang happened relatively slowly compared to how it is expanding now.

Chemistry
1 answer:
Sav [38]3 years ago
5 0
A. True_________________
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Write the balanced chemical equations, including states, for the neutralization reactions between: HI (aq) and NaOH (aq) H2CO3 (
rewona [7]

Answer:

* HI (aq) +NaOH (aq) \rightarrow NaI(aq)+H_2O(l)

* H_2CO_3 (aq) + Sr(OH)_2\rightarrow SrCO_3(s)+2H_2O(l)

* Ca(OH)_2 (s) +H_2SO_4 (aq)\rightarrow CaSO_4(aq)+2H_2O(l)

Explanation:

Hello!

In this case, since neutralization chemical reactions are carried out when an acid and a base react to produce a salt and water, for the first reaction, HI (aq) and NaOH (aq), we can write:

HI (aq) +NaOH (aq) \rightarrow NaI(aq)+H_2O(l)

Whereas the salt, sodium iodide remains aqueous and water liquid. Next, when carbonic acid and strontium hydroxide react, strontium carbonate as the salt precipitates out and water is also produced:

H_2CO_3 (aq) + Sr(OH)_2\rightarrow SrCO_3(s)+2H_2O(l)

Finally, when calcium hydroxide and sulfuric acid react, the compound calcium sulfate as the salt and water are produced as shown below:

Ca(OH)_2 (s) +H_2SO_4 (aq)\rightarrow CaSO_4(aq)+2H_2O(l)

Best regards!

8 0
3 years ago
Which subatomic particle plays the greatest part in determining the properties of an element?
Ostrovityanka [42]
The subatomic particle that plays the greatest role in determining the physical and chemical properties of an element is the electron. The electron has <span> symbol </span><span>e− </span><span>or </span><span>β− </span><span>with a negative </span>elementary electric charge<span>. Thank you for posting your question here. I hope the answer helps. </span>
8 0
3 years ago
Read 2 more answers
Which is the smallest number?
My name is Ann [436]

Answer:

What I came up with was D equaling out to be 42

Explanation:

Im assuming you just do the math

A. 3.5 x 104 = 364

B. 2.4 x 103 = 247.2

C. 1.4 x 10^2_2 = 280

D. 4.9 x 10-7 = 42

I hope I helped.

5 0
3 years ago
would you like to explore outer space? Why or why not? If you could travel to any part of the galaxy at lightning speed would li
morpeh [17]

Answer:

Yes!

Explanation:

I think It would be fun!, Going thought space going from planet to planet. once i get back to earth i can make a document about my time in space.

4 0
2 years ago
Is corn syrup a compound?
Ronch [10]

Answer:

Yes

Explanation:

big brain

7 0
3 years ago
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