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.
Answer:
90yrs
Explanation:
Half life is the time taken for half of an original radioactive material to decay by half.
For the sample;
Half - life = 45yrs
Original amount = 600cpm
Start Number of atoms
0yrs 600cpm
First half life
45yrs 300cpm
Second half life
90yrs 150cpm
Answer:
The temperature at which each bean is kept
Explanation:
Independent variable is what YOU CHANGE
Hey there!
"Which process responsible for the growth a repair of human tissue?"
Well, it heals itself which is called the mitosis but none of those are your answer choices .. the one that seems to be closer to those two results would be: Option 3.
Therefore, your answer would most likely be:
Good luck on your assignment and enjoy your day!
~
A: sublimation
B: condensation
C: melting
Explanation:
When in a solid between the molecules we have only weak forces the solid may undergo a face transition end by increasing temperature it will transform in a gas without going through the liquid state. This is sublimation.
When we drop the temperature of a gas between a certain limit were the forces between the molecules are no longer inhibited so they will stick together in a liquid form. This is condensation.
When a solid is transformed in a liquid, the temperature is high enough to overcome interactions between the particles so the molecules will gain a degree of freedom. This is melting.
Learn more:
brainly.com/question/1473540
#learnwithBrainly