Answer: The correct number of significant figures in is 35.05152.
Explanation:
Digits present in a number that helps in determining the degree of accuracy starting from the first non-zero digit is called a significant figure.
Some rules for significant figures are as follows.
- All the digits present within the non-zero digits are considered in a number.
For example, 2085 contains 4 significant digits.
- Leading zeros are not counted in a number.
For example, 0.0034 has 2 significant digits.
- We count the trailing zeros when a decimal point is present in a number.
For example, 0.02500 has 4 significant figures.
- When there is no decimal point then trailing zeros may or may not count.
For example, 19000 has 2 significant digits.
Now, the product of given digits is as follows.
Thus, we can conclude that correct number of significant figures in is 35.05152.
Polar protic solvents actually speed up the rate of the unimolecular substitution reaction because the large dipole moment of the solvent helps to stabilize the transition state. The highly positive and highly negative parts interact with the substrate to lower the energy of the transition state.
Hello!
Answer:
Gravity
Explanation:
It can settle down and separate over time due to gravity.
Hope this helps! Have a great day!
Answer : The molality of solution is, 0.866 mole/kg
Explanation :
The relation between the molarity, molality and the density of the solution is,
where,
d = density of solution = 1.0052 g/ml
m = molality of solution = ?
M = molarity of solution = 0.828 M = 0.828 mol/L
= molar mass of solute (acetic acid) = 60.05 g/mole
Now put all the given values in the above formula, we get the molality of the solution.
Therefore, the molality of solution is, 0.866 mole/kg
Answer:
The answer to your question is:
a) 0.069 moles of Iron
b) 0.052 moles of Oxygen
Explanation:
Data
mass Iron = 3.86 g
moles = ?
Atomic weight Fe = 56 g
Process
a) Solve it using a rule of three
56 g of Fe ---------------- 1 mol
3.86 g ---------------------- x
x = (3.86 x 1) / 56
x = 0.069 moles of Iron
b)
Balanced Equation
4Fe + 3O₂ ⇒ 2Fe₂O₃
Solve it using a rule of three
4 moles of Fe ----------------- 3 moles of O₂
0.069 moles of Fe --------- x
x = (0.069 x 3) / 4
x = 0.052 moles of Oxygen