Answer:
0.0226
Explanation:
Given data:
Mass of water = 0.406 g
Molar mass of water = 18.0 g/mol
Number of moles = ?
Solution:
Number of moles = mass/ molar mass
Number of moles = 0.406 g / 18.0 g/mol
Number of moles = 0.0226 mol
The answer with out units and three significant figures is 0.0226. In this value the significant figures are 226.
Answer:
1. Carbon?
2. C
3. Oceans
4. Not sure :C
5. Most diamonds are colorless, but are in a range of pale yellow or brown color that is termed the normal color range.
6. I think its refraction.
Explanation:
Answer:
pH = 6.5
Explanation:
Given data:
pH of substance = ?
[OH⁻] concentration = 3.2×10⁻⁸
Solution:
pOH = -log[OH⁻]
pOH = -log[3.2×10⁻⁸]
pOH = 7.5
we know that,
pH + pOH = 14
pH = 14- pOH
pH = 14 - 7.5
pH = 6.5
Answer:
730×10 6 g
Explanation:
each one mole of NH4NO3 has 2 moles of nitrogen (2×14)
N NH4NO3
2×14 14+(4×1) +14+(3×16)
28 80
? 2.086 × 10 9
2.086× 10 9 ×28 ÷80 = 730 × 10 6 g of Nitrogen