B. ribonucleic acid is the answer your looking for
Answer:
200g
Explanation:
Step 1:
The balanced equation for the reaction.
2Na + 2H2O —> 2NaOH + H2
Step 2:
Determination of the number of mole of NaOH produced by the reaction. This is illustrated below:
From the balanced equation above,
2 moles of H2O produced 2 moles of NaOH.
Therefore, 5 moles of H2O will also produce 5 moles of NaOH.
Step 3:
Conversion of 5 moles of NaOH to grams. This is illustrated below:
Number of mole of NaOH = 5 moles
Molar Mass of NaOH = 23 + 1 + 16 = 40g/mol
Mass of NaOH =?
Mass = number of mole x molar Mass
Mass of NaOH = 5 x 40
Mass of NaOH = 200g
This question is dealing with the half-life of carbon-14 which can be used to determine the age of a substance according to the following equation:
t = [ln(N/No)/(-ln2)] · t1/2
N = # of carbon-14 atoms presently = 250 atoms
No = # of carbon-14 atoms initially = 1000 atoms
t1/2 = half-life = 5730 years for carbon-14
We can now input all of the information into the formula to find the age of the fossil:
t = [ln (250/1000)/-ln2] x 5730 years
t = 11460 years
The fossil should be found to be roughly 11,460 years old.
Answer:
Measure the slopes of these tangents to get v at the times concerned: 4.0 m.s. -l ... The acceleration component is smaller, about 0.5 m.s. -2 . 5 - 10 s. : The car is in gear, being ... You cannot average the speeds, since the time intervals for each half ... The driver has taken 15 minutes of the allotted 20 minutes to cover the first.
Explanation:
because youre need calculate
