Answer:
C: Atoms of the same element that have similar chemical properties but have different numbers of neutrons
<u><em>Could I please have BRAINLIEST.</em></u>
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Answer:
the answer is A ( The basement)
HOPE THAT HELPSSS!!!
A substance made of two or more elements chemically combined in a set ratio or proportion is called a : compound
For example, water is an example of a compound that made by two elements, Hydrogen and oxygen
hope this helps
Answer:
5.42 mol
Explanation:
To find moles, divide the given mass by the compounds molar mass. To find the molar mass of the compound, add of the masses of each individual component:
Molar mass of NaNCO3 = Na + N + C + (O x 3)
Molar mass of NaNCO3 = 23 + 14 + 12 + (16 x 3)
Molar mass of NaNCO3 = 97 g/mol
Moles = mass / molar mass
Moles = 526 g / 97 g/mol
Moles = 5.42 mol
860 mL.
<h3>Explanation</h3>
Separate this process into two steps:
- Cool the balloon from 305 K to 265 K.
- Reduce the pressure on the balloon from 0.45 atm to 0.25 atm.
What would be the volume of the balloon after each step?
After Cooling the balloon at constant pressure:
By Charles's Law, the volume of a gas is directly related to its temperature in degrees Kelvins.
In other words,
,
where
and
are volumes of the same gas.
and
are the temperatures (in degrees Kelvins) of that gas.
Rearranging,
.
The balloon ended up with a lower temperature. As a result, its volume drops:
.
After reducing the pressure on the balloon at constant temperature:
By Boyle's Law, the volume of a gas is inversely proportional to the pressure on this gas.
In other words,
,
where
and
are volumes of the same gas.
and
are the pressures on this gas.
Rearranging,
.
There's now less pressure on the balloon. As a result, the balloon will gain in volume:
.
The final volume of the balloon will be
.