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svetoff [14.1K]
3 years ago
11

Help please i tried to do lab but i couldn’t figure it out

Chemistry
1 answer:
andreyandreev [35.5K]3 years ago
7 0
D. paper d, paper c, paper a, paper b
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What is the balanced equation for CaCO3(s) > CaO(s) + CO2(g
vlada-n [284]
Balanced equation :

1 CaCO3(s) = 1 CaO(s) + 1 CO2(g)

hope this helps!

3 0
3 years ago
A drop of water from a special dropper is 3ml. How many liters is this this. A(30) B(0.3) C(0.03) D(0.003)
Damm [24]
1L= 1000ml

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3 0
4 years ago
How many significant figures are in the measurement 40,500 mg?
schepotkina [342]

b) three

this is because all integers are sig figs, and all numbers between integers are sig figs. This makes the 40,5 part of 40,500 significant. Place holder zeroes that are not after a decimal are not significant, so the last two zeroes of the number are not significant.

3 0
4 years ago
Which element decreases its oxidation number in this reaction? bicl2 + na2so4 → 2nacl + biso4?
kifflom [539]
The balanced reaction is as follows;
BiCl₂ + Na₂SO₄ --> 2NaCl + BiSO₄
this is a double displacement reaction 
the oxidation number of Bi is +2 in both BiCl₂ and BiSO₄
oxidation number of Cl is -1 in both BiCl₂ and NaCl 
oxidation number of Na is +1 in both Na₂SO₄ and NaCl
oxidation numbers of elements in SO₄²⁻ remains the same in both compounds.Therefore the oxidation state in any of the elements in the reaction doesn't change. Neither of the elements show an increase or decrease in the oxidation numbers .
Answer for this question is no element decreases its oxidation number.

5 0
3 years ago
Read 2 more answers
In your own words, describe two patterns on the periodic table.
Kitty [74]

Answer:

periods and groups

Explanation:

periods are the columns on the periodic table

groups are the rows on the periodic table

i guess so

5 0
4 years ago
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