Answer:
Embryonic stem cells are pluripotent, meaning they can give rise to every cell type in the fully formed body, but not the placenta and umbilical cord. ... Human embryonic stem cells have been derived primarily from blastocysts created by in vitro fertilization (IVF) for assisted reproduction that were no longer needed
Explanation:
<span>1. Calculate the mass of the formula unit (fu). Na= 22.990 g/mol Cl= 35.453 g/mol so total = 22.990 g/mol + 35.453 g/mol = 58.443 g/mol
1 mol = 6.02 x10^23 formula units, so (58.443 g/mol)*(1 mol/6.02x10^23 fu)= 9.7x10^-23
2. Convert mass to grams: (0.17 mg)*(1 g/1000 mg) = 0.00017 g
3. Calculate number of formula units: 0.00017 g x (1 fu/9.7x10^-23 g) = 1.8x10^18
Or more simply:
(.00017 g) * (1 mol/58.443 g) * (6.02x10^23 fu/1mol) = 1.8x10^18</span>
No one can do that by him or her self
Answer:
96.0 grams of oxygen gas (O2) will be produced.
Option B is correct.
Explanation:
Step 1: Data given
Number of moles SO2 = 2.0 moles
Molar mass O2 = 32.0 g/mol
Step 2: The balanced equation
2H2S(g) + 3O2(g) → 2SO2(g) + 2H2O(g)
Step 3: Calculate moles oxygen gas (O2)
For 2 moles H2S we need 3 moles O2 to produce 2 moles SO2 and 2 moles H2O
For 2.0 moles SO2 produced we need 3/2 * 2.0 = 3.0 moles O2
Step 4: Calculate mass O2
Mass O2 = moles O2 * molar mass O2
Mass O2 = 3.0 moles * 32.0 g/mol
Mass O2 = 96.0 grams
96.0 grams of oxygen gas (O2) will be produced.
Option B is correct.
