Answer:
- 19
Step-by-step explanation:
Step 1:
3m - 10 Equation
Step 2:
3 ( - 3 ) - 10 Substitute - 3 for m
Step 3:
- 9 - 10 Multiply
Answer:
- 19 Subtract
Hope This Helps :)
Answer:
0.000071
Step-by-step explanation:
The given number that is given in scientific notation is, ............(1)
We need to write this number in standard notation. A number can be written in scientific notation as :
..........(2)
In standard notation,
So, is equivalent to . Hence, the correct option is (d)
Answer:
-243
Step-by-step explanation:
105 i think nvm not corrupted picture
In the balanced reaction
2 Fe + O₂ → 2 FeO
2 moles of iron (Fe) react with 1 mole of molecular oxygen (O₂) to produce 2 moles of iron oxide (FeO). The ratio of Fe to FeO is 1-to-1, so if one starts with 42.4 mol of Fe, one will end up with the same amount of FeO, 42.4 mol.
Look up the molar mass of Fe and O:
• Fe = 55.845 g/mol
• O = 15.999 g/mol
Then the molar mass of FeO is approximately 71.835 g/mol, and so the mass of 42.4 mol of FeO is
(42.4 mol) × (71.835 g/mol) ≈ 3050 g
