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Scrat [10]
3 years ago
7

Elemental mercury combines with oxygen to make mercury oxide. write a balanced equation

Chemistry
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0
Hg + O2 --> HgO + O

Note that Mercury has a variable valency. 

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What exactly is arsenic and what is it usted for
zaharov [31]

Answer:

it's a poison used to kill people in old times sry if it's wrong

Explanation:

3 0
3 years ago
How many atoms are in a sample of 175 grams of sodium (Na)? The answer needs to be <br> a x 10^b
ValentinkaMS [17]
Atomic mass Sodium ( Na ) = 22.98 u.m.a

22.98 g ----------------- 6.02x10²³ atoms
175 g ------------------- ?? atoms

175 x ( 6.02x10²³) / 22.98 =

4.58x10²⁴ atoms of Na

hope this helps!

4 0
3 years ago
Why are non-metals dull in appearance as solids?
Inessa [10]
Metalloids are metallic-looking brittle solids<span> that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical </span>nonmetals<span> have a </span>dull<span>, coloured or colourless </span>appearance<span>; are </span>brittle<span> when </span>solid<span>; are poor conductors of heat and electricity; and have acidic oxides.</span>
6 0
3 years ago
If the gas in the above system has a volume of 256 mL at a pressure
evablogger [386]

Answer:

the volume of the same gas at pressure of 1.00atm =737.3ml

6 0
2 years ago
The reaction between carbon tetrachloride, CCl4, and water, H2O, to form carbon dioxide, CO2, and hydrogen chloride, HCl, has a
xxTIMURxx [149]

Answer:

High activation energy is the reason behind unsuccessful reaction.

Explanation:

There are two types of reaction: (1) thermodynamically controlled reaction and (2) kinetically controlled reaction.

Thermodynamically controlled reaction are associated with change in enthalpy during reaction. More negative the enthalpy change, more favored will be the reaction.

Kinetically controlled reaction are associated with activation energy of a reaction. The lower the activation energy value, the more rapid will be the reaction.

Here, reaction between CCl_{4} and H_{2}O is thermodynamically favored due to negative enthalpy change but the high activation energy does not allow the reaction to take place by simple mixing.

6 0
3 years ago
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