Answer:
Option D. 30 g
Explanation:
The balanced equation for the reaction is given below:
2Na + S —> Na₂S
Next, we shall determine the masses of Na and S that reacted from the balanced equation. This is can be obtained as:
Molar mass of Na = 23 g/mol
Mass of Na from the balanced equation = 2 × 23 = 46 g
Molar mass of S = 32 g/mol
Mass of S from the balanced equation = 1 × 32 = 32 g
SUMMARY:
From the balanced equation above,
46 g of Na reacted with 32 g of S.
Finally, we shall determine the mass sulphur, S needed to react with 43 g of sodium, Na. This can be obtained as follow:
From the balanced equation above,
46 g of Na reacted with 32 g of S.
Therefore, 43 g of Na will react with = (43 × 32)/46 = 30 g of S.
Thus, 30 g of S is needed for the reaction.
When given the symbol, you can look on the periodic table of elements to find what the atomic number is, which is the number in the corner next to the symbol. The number of protons in the element is the atomic number. The number of neutrons is the mass number minus the number of protons.
Hope it helps:)
Answer : and are the ions formed from the NaCl salt dissolve in water.
Explanation :
The NaCl salt is formed when positive sodium ions bonded to the negative chloride ions.
When NaCl dissolves in water, the negative part of water attract the positive sodium ions and positive part of water attract the negative chloride ions.
Answer is: atoms have the greatest kinetic energy in <span>liquid iron (2,000°C).
</span>The average kinetic energy of molecules depends on the temperature.
At high temperature(2,000°C), molecules of iron have greater kinetic energy than molecules of iron at low temperature (1,600°C, 65°C and 25°C)..