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Rufina [12.5K]
3 years ago
6

How many calories would you need for converting ice at -20oc to boiling water?

Chemistry
1 answer:
Nezavi [6.7K]3 years ago
6 0
About the amount in a 20 oz gatorade bottle
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Can this reaction take place/does it exist - . CaCl2+CO2+H20----> CaCO3 + 2HCl
mash [69]
Yes the reaction given above does exist
First of all CaCl2 will react with  water to form CaO  and HCl  then it will react with CO2 to form <span>CaCO3 
</span>CaCO3 + 2HCl <span>>>></span>     CaCl2+CO2+H20
so i conclude it does exist
hope it helps
6 0
3 years ago
Which indicator is yellow in a solution with a pH of 9.8?
Vlada [557]
It's the Methyl Orange. 
at about 4.4 pH, it changes from red to Yellow, to indicate an acid solution.
This pH indicator is normally used in titration of acids.

Hope this Helps :)
8 0
3 years ago
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Which of the following is soluble in water? <br>1-glycerin <br>2-sand<br>3-iron filing<br>4-oil​
sineoko [7]

Answer:

1-glycerin

Explanation:

Hope it helps! :)

4 0
3 years ago
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Covalent bond of N and S
Mademuasel [1]

Answer:

Covalent bond between identical atoms

Covalent bonds occur between identical atoms or between different atoms whose difference in electronegativity is insufficient to allow transfer of electrons to form ions. ... The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond.

8 0
2 years ago
What causes a substance to be hydrophobic?
WITCHER [35]
The hydrophobic effect is caused by nonpolar molecules clumping together. Large macromolecules can have hydrophobic sections, which will fold the molecule so they can be close to each other, away from water. Many amino acids in proteins are hydrophobic, helping the proteins obtain their complicated shapes. The hydrophobic effect extends to organisms, as many hydrophobic molecules on the surface of an organisms help them regulate the amount of water and nutrients in their systems.
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