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Scrat [10]
4 years ago
7

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

Chemistry
1 answer:
Ilia_Sergeevich [38]4 years ago
6 0
Hg + O2 --> HgO + O

Note that Mercury has a variable valency. 

You might be interested in
An aqueous HCL solution has a proton concentration equal to 6.00 mol/L. The HCL concentration in this solution is ————M.
Harman [31]

Answer:

HCl conc.= 6.0mol/L

Explanation:

From the dissociation of HCl= 1 mole H+ and 1mol Cl-, which is equivalent stoichiometrically in concentration to that of 1 mol HCl,

4 0
4 years ago
How many atoms (mol) is in 10g of sodium, sodium chloride and Iron chloride?
SashulF [63]

Answer:

See explanation

Explanation:

Molar mass of NaCl = 58.5 g

Number of moles contained in 10 g of NaCl = 10 g/58.5 g = 0.17 moles

If 1 mole of NaCl contains 6.02 * 10^23 atoms

0.17 moles of NaCl contains 0.17 * 6.02 * 10^23 atoms = 1.02 * 10^23 atoms

Molar mass of Fe II chloride = 126.751 g/mol

Number of moles = 10 g/126.751 g/mol = 0.0789 moles

Number of atoms = 0.0789 moles *  6.02 * 10^23 atoms = 4.7 * 10^22 atoms

Molar mass of Na = 23 g/mol

Number of moles = 10g/23 g/mol = 0.43 moles

Number of atoms = 0.43 moles *  6.02 * 10^23 atoms = 2.59 * 10^ 23 atoms

8 0
3 years ago
Will the volume of a 1.0 L sample of gas at STP change if the pressure and temperature are both doubled
Dmitry_Shevchenko [17]

Answer:

The volume will not change.  This belongs in Ripley's Believe It or Not.

Explanation:

The combined gas law can be used to model both the initial (1) and ending (2) states of a gas when pressure (P), temperature (T) and/or volume (V) change, but the number of moles does not.  Remember that temperature must always be in Kelvin.

P1V1/T1 = P2T2/T2

Rearranging for V2:

V2 = V1(T2/T1)(P1/P2)

I've arranged the pressure and temperature terms as ratios.  This makes it easier to see what impact changes will have, plus the units conveniently cancel for both.

(V2) = (1 L)(T2/T1)(P1/P2)

We are told that P2 and T2 are both doubled:

   (T2/T1) = 2

   (P1/P2) = 1/2

V2 = (1 L)(T2/T1)(P1/P2)

V2 = (1 L)(2)(1/2)

V2 = (1 L)(2)(1/2)

V2 - 1 L

The volume does not change.  Bummer.

7 0
2 years ago
Which of the following Group 1A elements is the most reactive?
Alisiya [41]
A. Cesium because reactivity of alkali metals increases from the top to the bottom of the group.
7 0
3 years ago
Read 2 more answers
Express in scientific notation. Choose the answer with the proper number of significant figures.
bazaltina [42]

Answer:

4.5 times 10 = 45

Explanation:

"Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant."

3 0
3 years ago
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