D has a total of four significant figures.
It represents the number of moles required of that molecule to balance the chemical equation, which means to have the reaction chemically happen and goes to completion.
For example:
CH4 + O2 --> H2O + CO2 that is not balanced
with the coefficients located
CH4 + 2O2 --> 2H2O + CO2 now with the coefficients the number of oxygen and hydrogen on each side are equal
The answer is an igneous rock.
Hope this helps!!
The clearer answer is they measure the remaining carbon, and the less that there is the older the fossil is.
Answer:
138mL are required to make the solution
Explanation:
A solution of 0.270M contains 0.270 moles of solute (NaCl in this case), per liter of solution.
To solve this problem we need to determine the moles of NaCl in 2.18g. With these moles and molarity we can find the volume required to prepare the solution:
<em>Moles NaCl -Molar mass: 58.44g/mol-:</em>
2.18g * (1mol / 58.44g) = 0.0373moles NaCl
<em>Volume of solution:</em>
0.0373moles NaCl * (1L / 0.270moles) = 0.138L
<h3>138mL are required to make the solution</h3>
