Answer:
no, its the first option
Explanation:
the independent variable (which is the one you deliberately change) always goes on the x-axis)
The molecular formula of the compound is C₇H₁₄.
<h3>What is the relationship between empirical formula and molecular formula?</h3>
The empirical formula of a compound and the molecular formula is related as follows:
- Molecular formula = n x empirical formula
The empirical mass of the compound = 12 + 4 = 14
n = molecular mass/empirical mass
n = 98.1861/14 = 7
molecular formula will be n(CH2) = C₇H₁₄
In conclusion, the molecular formula is determined from the molecular mass and empirical mass.
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Answer:
a. Increase
b. 539 L
Explanation:
Step 1: Given data
- Initial volume (V₁): 200.0 L
- Initial pressure (P₁): 760 mmHg
- Final pressure (P₂): 282 mmHg
Step 2: Calculate the final volume of the gas
The pressure of the gas is inversely proportional to the volume. So, as the pressure decreases, the volume must increase. Assuming constant temperature and ideal behavior, we can calculate the final volume of the gas using Boyle's law.
P₁ × V₁ = P₂ × V₂
V₂ = P₁ × V₁/P₂
V₂ = 760 mmHg × 200.0 L/282 mmHg = 539 L
Answer:
option b is correct option = (6.76×10¹⁴ Hz)
Explanation:
Given data:
Wavelength of photon = 4.42×10⁻⁷ m
Speed of light = 2.99×10⁸ m/s
Frequency of radiation = ?
Solution:
Formula:
Speed of wave = frequency × wavelength
Now we will rearrange this formula.
frequency = Speed of wave / wavelength
f = c/ λ
f = 2.99×10⁸ m/s / 4.42×10⁻⁷ m
f = 0.676×10¹⁵ Hz (s⁻¹ = Hz)
f = 6.76×10¹⁴ Hz
Thus option b is correct option.
Half-life is the time required for decay of 50% of radio-active nuclei.
Thus, when radio-active material crosses 1st half-life, 100/2 = 50% radio-active material is left and remaining 50% is elapsed.
When, when radio-active material crosses 2nd half-life, 50/2 = 25% radio-active material is left and remaining 75% is elapsed.
When radio-active material crosses 3rd half-life, 25/2 = 12.5% radio-active material is left and remaining 87.5% is elapsed.
Thus, 2 <span>half-lives must elapse until 84 % of a radioactive sample of atoms has decayed.</span>