1) Chemical equation:
Mg + O2 -> MgO
2) Balanced chemical equation:
2Mg + O2 -> 2MgO
3) Ratios
2 mol Mg : 1 mol O2 : 2 mol MgO
4) Convert 2 grams of Mg to number of moles
Molar mass of Mg: 24.3 g/mol
# of moles = grams / molar mass = 2g / 24.3 g/mol = 0.0823 mol
5) Use the theoretical ratio fo find the number of moles of MgO produced
0.0823 mol Mg * 2mol MgO / 2 mol Mg = 0.0823 mol MgO
6) Use the molar mass of MgO to obtain the quantity in grams
Molar mass of MgO = 24.3 g/mol + 16 g/mol = 40.3 g/mol
0.0823 mol MgO * 40.3 g/ mol = 3.32 g
Answer: 3.32 g
The answer is a, because the question is referring to partial pressures. Partial pressures are a mere sum, no halving or doubling of anything is necessary.
So, A
Hope this helped :)
Answer:
They are synthesized from raw materials
Explanation:
All synthesized products goes through lots of processes. This processes involves the conversion of substances known as raw materials into a more useful and modified form.
These synthesized products are usually more useful and made in order to solve a given problem or offer a particular service. Raw materials are cheaper than the synthesized products and are common in all industries and fields.
Answer:
Mark has a speed of 6 MPS (Miles Per Hour)
Explanation:
It took mark 2 hours to ride his bike to his grandma's house, which was 12 miles away. I divided 2 by 12 and got 6. Remember this: mph = miles away ÷ time.
Answer:
C
Explanation:
For an organism scientific names the first part is the genus and the second is the species