Answer:
D. The new rms speed is 1.732 times the original rms speed.
Explanation:
The expression for the root mean square speed is:
R is Gas constant having value = 8.314 J / K mol
M is the molar mass of gas
T is the absolute temperature
As seen from the formula, root mean square speed is directly proportional to the square root of the absolute temperature.
So,
Given, absolute temperature of a gas is tripled, so, the new rms speed will be √3 (1.732) of the original.
<u>Hence, the correct option is:- D. The new rms speed is 1.732 times the original rms speed.</u>
Answer:
14.9075 g, 28.67%, 0.11%
Explanation:
The mean concentration of calcium = summation x / frequency
= ( 14.92 + 1491 + 14.88 + 14.92 ) /4 = 14.9075 g
Standard deviation = √(summation (x - μ)² /n) = √ ( ((14.92 - 14.9075)² +(14.91 - 14.9075)² + (14.88 - 14.9075)² + ( 14.92 - 14.9075)²) / 4) = 0.0164
b) percent error = abs(14.9075 - 20.90) / 20.90 × 100 = 28.67%
c) relative standard deviation = standard deviation / mean × 100 = 0.0164 / 14.9075 × 100 = 0.11%
d) The accuracy of the measure is the measurement compared to the actual which according to the standard set by the instructor (5%error) is not very accurate because the percent error is high (28.67%) while the relative standard deviation is quite low ( 0.11%) which means the measurement precision is very high.
The student will have to redo the experiment because the experiment was not too accurate since the percent error is way higher than the set value (5%) although the precision was high.
The answer is calving
hope that helped
Answer:
1. 12.18g of N2H4.
2. 62.24g of N2H4
3. 87.23g of N2
Explanation:
N2 + 2H2 —> N2H4
Molar Mass of N2 = 2x14 =28g/mol
Molar Mass of N2H4 = (2x14) + (1x4) = 28 + 4 = 32g/mol
Molar Mass of H2 = 2x1 = 2g /mol
Mass conc of H2 from the balanced equation = 2 x 2 = 4g
1. From the balanced equation,
28g of N2 produced 32g N2H4.
Therefore, 10.66 g of N2 will produce = (10.66x32)/28 = 12.18g of N2H4.
2. From the balanced equation,
4g of H2 produced 32g of N2H4.
Therefore, 7.78 g of H2 will produce = (7.78x32)/4 = 62.24g of N2H4
3. From the balanced equation,
28g of N2 produced 32g N2H4.
Therefore, Xg of N2 will produce 99.69 g of N2H4 i.e
Xg of N2 = (28x99.69)/32 = 87.23g
Explanation:
Different coloured fireworks can be achieved through the chemistry bond of reaction between substances and methyl orange or other as indicator and promoter too.
