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bekas [8.4K]
3 years ago
15

You have 500 grams of phosphorus-32. How much, in grams, will remain radioactive after 71.4 days?​

Chemistry
1 answer:
Solnce55 [7]3 years ago
3 0

Answer:

You'll be left with 0.25 g of phosphorus-32.

Explanation:

Does this help?

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How many grams of Cl2 must react to produce 0.0923 mol of AlCl3? Show work.
alexandr402 [8]

First, let's state the chemical reaction:

2Al+3Cl_2\to2AlCl_3\text{.}

We can find the number of moles of Cl2 required to produce 0.0923 moles of AlCl3, doing a rule of three: 3 moles of Cl2 reacted produces 2 moles of AlCl3:

\begin{gathered} 3molesCl_2\to2molesAlCl_3 \\ \text{?moles Cl}_2\to0.0923\text{ moles }AlCl_3\text{.} \end{gathered}

The calculation would be:

0.0923molesAlCl_3\cdot\frac{3molesCl_2}{2molesAlCl_3}=0.138molesCl_2.

And the final step is to convert this number of moles to grams. Remember that the molar mass can be calculated using the periodic table, so the molar mass of Cl2 is 70.8 g/mol, and the conversion is:

0.138molesCl_2\cdot\frac{70.8gCl_2}{1molCl_2}=9.770gCl_2.

The answer is that we need 9.770 grams of Cl2 to produce 0.0923 moles of AlCl3.

3 0
1 year ago
. De las siguientes soluciones:
Ivahew [28]

Answer:

can u translate this to English? I might be able to help

6 0
3 years ago
An argon ion laser emits light of wavelength of 488 nm. (a) Calculate the frequency of the light. (b) Suppose a pulse of light f
Alex787 [66]

Answer:

A) 6.15×10^14 per sec

B)2.5 sec

Explanation:

Wavelength of light = 488 nm

speed of light = 3×10^8 m/s

therefore, frequency of light  \nu=\frac{c}{\lambda}

⇒ \nu=\frac{3\times10^8}{488\times10^{-9}}

⇒ν= 6.15×10^14 per sec

b) distance between moon and earth =  3.8×10^5 km.

= 3.8×10^8 m

light travel from earth moon and back to earth

therefore, distance traveled= 2× 3.8×10^8 m = 7.6×10^8 m

therefore time= distance/speed

⇒ time= \frac{7.6\times10^8}{3\times10^8}

= 2.5 sec

So, for a round trip time required is 2.5 sec.

5 0
3 years ago
A generator is not required to generate electrical energy when which of the following energy sources is used?
Anon25 [30]

Answer:

think it's C but my gut is telling me A

Explanation:

5 0
3 years ago
Read 2 more answers
What energy transform occours in a genorator
guapka [62]

Answer:

please mark me as brainlist

Explanation:

The generation of electrical power requires relative motion between a magnetic field and a conductor. In a generator, mechanical energy is converted into electrical energy.

4 0
3 years ago
Read 2 more answers
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