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marishachu [46]
3 years ago
5

Which term best indicates the average mass of an atom of an element?

Chemistry
2 answers:
Firdavs [7]3 years ago
8 0
The answer is the atomic mass.
Kobotan [32]3 years ago
6 0
<span>it is the total number of protons plus the total number of neutrons expressed in D.) atomic mass units</span>
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I need help with this! I WILL GIVE YOU BRAINLIST!
melisa1 [442]

Answer:

Farther, longer, longer

Explanation:

The further away a planet is from the sun, the larger the orbit. This makes the time for the planet to make a revolution around the sun longer.

8 0
2 years ago
What are the four symbols for physical states of reactants and products?
Studentka2010 [4]
Solid -(s)
liquid - (l)
gas - (g)
aqueous - (aq)
7 0
3 years ago
What is the volume of 300. g of mercury vapor at 822K and 0.900 atm?
Dominik [7]

Answer:

112.2L

Explanation:

Volume (V) = 300g

Temperature (T) = 822K

Pressure (P) = 0.9atm

using the ideal gas equation;

PV = nRT\\\\ V = \frac{nRT}{P}

Molar gas constant (R) = 0.0821L.atm/mol.K

Mole (n) = \frac{Mass (m)}{Molar mass (M)}                Molar mass of Mercury  = 200.59g/mol

n = \frac{300g}{200.59 g/mol} \\

   = 1.496mol

Now, the volume can be calculated;

V = \frac{1.496mol* 0.0821L.atm/mol.K*822K}{0.9atm}

∴Volume of mercury = 112.2L

8 0
2 years ago
PLZ HELP THIS IS DUE IN 6 MINS
Allisa [31]
The answer is metals
5 0
3 years ago
Read 2 more answers
Question 10
bixtya [17]
The reaction that should be followed is
Na2SO4 + C<span>a(NO3)2 --> CaSO4 + 2NaNO3</span>
first calculate the limiting reactant
mol Na2SO4 = 0.075 L (<span>1.54×10−2 mol / L) = 1.155x10-3 mol


mol Ca(NO3)2 = 0.075 L (</span><span>1.22×10−2 mol / L) = 9.15x10-4 mol
so the limiting reactant is the Ca(NO3)2

so all of the Ca2+ will be precipitated, percentage unprecipitated = 0.00 % </span>



5 0
3 years ago
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