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Setler [38]
2 years ago
12

Which of the following always changes when a substance undergoes a chemical change?

Chemistry
2 answers:
vovangra [49]2 years ago
6 0

Answer:

A. State of matter of the substance.

Explanation:

During a chemical change, the composition of matter always changes.

amm18122 years ago
6 0

Answer:

I would say C.

Explanation:

My best bet is C but in all honesty, i have no clue. -hope my non-helping helped :D

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What mass of chloride gas will react with 96.6g of sodium?
Oduvanchick [21]
Molar mass :

Cl₂ =  71.0 g/mol        Na = 23.0 g/mol

<span>2 Na + Cl</span>₂<span> = 2 NaCl
</span>
2 x 23 g Na -------> 71.0 g Cl₂
96.6 g Na ----------> ?

Mass Cl₂ = ( 96.6 x 71.0 ) / ( 2 x 23 )

Mass Cl₂ = 6858.6 / 46

= 149.1 g of Cl₂

hope this helps!

8 0
3 years ago
If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?
arsen [322]
Firstly, atoms are also composed of protons and neutrons as well as electrons.

Now, to answer your question... Atoms are the smallest you can go while still having it be an element, hence the definition ''<span>the basic unit of a chemical element.'' It is the smallest unit that has the chemical properties of an element. However, atoms still need these charges to be atoms. Without electrons, they'd just be ions. Hope this helps.</span>
8 0
3 years ago
With the help of word equations identify the products of heating candle wax?​
Y_Kistochka [10]

Explanation:

The word equation for the burning of a candle is wax plus oxygen yields carbon dioxide and water. This is an exothermic reaction that produces both light and heat.

The fuel for a burning candle is the wax. There are many different types of wax with a corresponding number of chemical formulas, but they are all hydrocarbons. Hydrocarbons are molecules made from hydrogen and carbon.

Burning the wax pulls the hydrogen and carbon in the wax apart and recombines them with oxygen from the atmosphere. This is an oxidation reaction. The resulting carbon dioxide and water are gases that disperse in the air.

follow me

3 0
3 years ago
Read 2 more answers
What is the molar mass of (NH4)3 PO4? 113g, 121g, 149g, 339g
allochka39001 [22]
(NH4)3PO4 :

N = 14 * 3 =  42
H = 1 * 12 = 12
P = 31 * 1 = 31
O = 16 * 4 = 64
-------------------------
42+12+31+64 =  149 g / mol

Hope this helps!.


7 0
2 years ago
How Many Significant Figures are there in 505
cupoosta [38]

Answer:

there are three significant digits.

Explanation:

Thus,  21.8, 0.283 and 567 all have three significant digits. 2. Zeros appearing between non-zero digits are significant. Thus, 505 and 0.206 have three significant digits, while 50,005 has five significant digits.   (from google)

7 0
3 years ago
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