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Kamila [148]
4 years ago
8

All changes in state require energy to be added or taken away true or false

Chemistry
2 answers:
Lyrx [107]4 years ago
5 0

Answer:

True

Explanation:

All changes in phase of matter require the temperature of the substance to change

tiny-mole [99]4 years ago
3 0

Answer:

True

Explanation:

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In which of the following choices is the oxidation number incorrect?
8_murik_8 [283]

Cl2(s); oxidation number 1 is the incorrect choices in oxidation number.

Explanation:

In the elemental form oxidation state is zero. Here chlorine is present in elemental form so oxidation state is zero.

Oxidation number depends on the number of electrons gained or lost by an atom of the element say in compound formation.

If electron is gained oxidation number becomes negative.

If electron is lost then oxidation number is positive.

If the octet rule is fulfilled that valence shell is filled them atomic number gets zero. Since Cl2 is in neutral state the oxidation number is 0.

Oxidation number in general can be made out by checking the valency of the element as oxidation number is also equal to the valency.

4 0
3 years ago
What type of energy warms earths surface?
Scrat [10]
A. solar energy

the earth is warmed by the sun, which is solar (or infrared).
8 0
3 years ago
Can someone help me please:)
docker41 [41]

Answer:

what we ain't that smart

5 0
3 years ago
In a titration experiment, hcl and lioh solutions were used. the initial volume of hcl was 1.25ml and lioh was 2.65 ml. the fina
aliya0001 [1]
Answer is: <span>the molarity of HCl is </span>0.097 M.
Chemical reaction: LiOH + HCl → LiCl + H₂O.
V(HCl) = 13.60 mL - 1.25 mL = 12.35 mL.
V(LiOH) = 11.20 mL - 2.65 mL = 8.55 mL.
c(LiOH) = 0.140 M.
From chemical reaction: n(LiOH) : n(HCl) = 1 : 1.
c(HCl) · V(HCl) = c(LiOH) · V(LiOH).
c(HCl) = 8.55 mL · 0.140 M / 12.35 mL.
c(LiOH) = 0.097 M. 
8 0
3 years ago
If the map shows the average high temperature in July for two cities in Texas. like Del Rio=36°c
Sedbober [7]

Answer:

D

Explanation:

Ocean breezes keep coastal galveston cooler than Del Rio, which is inland exposed to southerly winds.

4 0
3 years ago
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