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3 years ago

Plz answer 15 points both 8 and 9 please thanks:)

Chemistry

1 answer:

aliina [53]3 years ago

7 0

1the carrier would be 3 as to the the yes and the no differ from 2 which would mean they are the same, but if you take three , you have more equal signal, giving it a better digital quality
2incorect, primary, and clocks-worth both as well also use binary ode, because they all have a timmid connetion between gavity waves

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Magicians often use ‘flash powder’ in their acts. Flash powder contains 69.0% potassium chlorate (31.9% K, 28.9% Cl, 39.2% O) an

mafiozo [28]

Answer:

$\rm K$ : approximately $22.0\%$ .

$\rm Cl$ : approximately $19.9\%$ .

$\rm O$ : approximately $27.0\%$ .

$\rm Al$ : $31.0\%$ .

Explanation:

Consider a $100\; \rm g$ sample. There would be $69.0\% \times 100\; \rm g = 69.0\; \rm g$ of $\rm KClO_{3}$ and $100.0\; \rm g - 69.0\; \rm g = 31.0\; \rm g$ of $\rm Al$ .

Out of that $69.0\; \rm g$ of $\rm KClO_{3}$ :

$31.9\%$ (by mass) would be $\rm K$ : $31.9\% \times 69.0\; \rm g \approx 22.0\; \rm g$ .

$28.9\%$ (by mass) would be $\rm Cl$ : $28.9\% \times 69.0\; \rm g \approx 19.9\; \rm g$ .

$39.2\%$ (by mass) would be $\rm O$ : $39.2\% \times 69.0\; \rm g \approx 27.0\; \rm g$ .

Overall, the composition (by mass) of each element in this mixture would be:

$\rm K$ :

$\begin{aligned} & \frac{31.9\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 31.9\% \times 69.0\% \\ \approx \; & 22.0\%\end{aligned}$ .

$\rm Cl$ :

$\begin{aligned} & \frac{28.9\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 28.9\% \times 69.0\% \\ \approx \; & 19.9\%\end{aligned}$ .

$\rm O$ :

$\begin{aligned} & \frac{39.2\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 39.2\% \times 69.0\% \\ \approx \; & 27.0\%\end{aligned}$ .

$\rm Al$ :

$\begin{aligned}& \frac{100\; \rm g - 69.0\; \rm g}{100\; \rm g} \\ =\; & 100\% - 69.0\% \\ =\; & 31.0\%\end{aligned}$ .

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3 years ago

Ions are charged particles. therefore, ions must always have and unequal number of

Kitty [74]

Atoms in element of the periodic table

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4 years ago

What is the density of a 21.0 g object if, when added to a graduated cylinder, it makes the water level rise from 25.00 mL to 28

polet [3.4K]

D=m/v
density = 21/3.5
density = 6 g/ml

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3 years ago

6 tons of pig ovaries were required to extract 13.0 mg of estrone. Assuming complete isolation of the hormones was achieved, cal

jasenka [17]

One US ton will be equal to 907.185 kg and 1kg will be equal to 10^6mg.

<span>mass percentage of estrone= </span>estrone mass/<span>tissue mass * 100%
</span>mass percentage of estrone= 13mg/ (6 tons * 907.185 kg /ton * 10^6mg/kg) * 100%
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4 years ago

What is the main link between water in the oceans and on land

Elanso [62]

Answer: evaporation, condensation, and precipitation

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3 years ago