3 years ago

Which situation describes the best example of rotational motion?

Chemistry

2 answers:

Reika [66]3 years ago

6 0

Answer:

yeah

Explanation:

Vladimir79 [104]3 years ago

6 0

Answer:

The actual Answer is :

C. Sara spun the dreidel on its pointed end.

Explanation:

there you go bruh brainliest pls

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How many moles of each element (C, H, and O) are present in a 100.0 g sample of<br> ethanol?

Anuta_ua [19.1K]

Answer:

2.173 moles of ethanol is presented in a 100.0g sample of ethanol .

Explanation:

The amount of substance that contains as many Particles as there are atoms in exactly 12g of carbon- '12 isotope is called 1 mole '= 46 u.

7 0

3 years ago

How many grams of calcium bromide are in 50.0 mL of a 0.25 M calcium bromide solution?

lianna [129]

$C_{m}=\frac{n}{V_{r}}\\\\
m=\frac{m}{M}\\\\
C_{m}=\frac{m}{MV_{r}} \ \ \ \ \Rightarrow \ \ \ \ m=C_{m}MV_{r}}\\\\
C_{m}=0.25\frac{mol}{L}\\
M_{CaBr_{2}}=200\frac{g}{mol}\\
V_{r}=50mL=0.05L\\\\
m=0.25\frac{mol}{L}*200\frac{g}{mol}*0.05L= \emph{\textbf{2.5g}}$