Answer:
C. 3 and 4
Explanation:
Count H's in formula (each has 4)
- Hope that helped! Please let me know if you need a further explanation.
Answer:
jeg;djb;dfjbejfnvjkndjv
Explanation:
i can not read it clearly
Answer:
Frequency = 0.6 × 10¹⁵ s⁻¹
Explanation:
Given data:
Wavelength = 5.32 × 10⁻⁷ m
Frequency = ?
Solution:
Formula:
speed of light = wavelength × frequency
Frequency = speed of light / wavelength
Frequency = 3 × 10⁸ m/s / 5.32 × 10⁻⁷ m
Frequency = 0.6 × 10¹⁵ s⁻¹
Answer:
D
Explanation:
I think the answer is part d.
First we will write the formula for the combustion of the sugar.
C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O
We have produced 2.40 g of CO₂. We will convert this to moles of CO₂ and then convert that value to moles of sugar.
2.40 g / 44.0 g/mol = 0.0545 moles CO₂ x 1 mole C₁₂H₂₂O₁₁/12 mole CO₂ = 0.00455 moles of C₁₂H₂₂O₁₁
We can now convert the moles of sugar to a mass of sugar.
0.00455 moles C₁₂H₂₂O₁₁ x 342 g/mol = 1.56 g C₁₂H₂₂O₁₁
We want to determine the mass percentage of salt in the 3.5 g mixture of sugar and salt.
3.5 g mixture - 1.56 g sugar = 1.94 g salt
(1.94 g salt/ 3.5g mixture) x 100% = 55%
Therefore, the mass percentage of table salt in the mixture is 55%.
