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natita [175]
3 years ago
15

Potassium and bromine combine to make KBr. What is the name of this compound?

Chemistry
2 answers:
Alex777 [14]3 years ago
6 0
<span>Potassium bromidr KBr hope that helps</span>
makkiz [27]3 years ago
4 0
The name is Potassium bromide.
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Copper(l) sulfide can react with oxygen to produce copper metal by the reaction cu2s + o2 =&gt; 2cu + so2. if 5.00 g of cu2s is
valentina_108 [34]
To answer this problem, we write first the stoichiometric equation. Thus we have,

Cu2S + O2 => 2Cu + SO2

Next, we check if the equation is balanced or not.

(left)     (right)
2 Cu  = 2 Cu
1 S  =  1 S
2 O = 2 O

So the stoichiometric equation is balanced, let's proceed in solving the theoretical yield of Cu given 5 g of Cu2S.

First, we solve for Cu2S in moles,
5 g Cu2S x <u>1 mol Cu2S </u>  = 0.0314 mol Cu2S
                159.16 g Cu2s

Secondly, convert moles of Cu2S to moles Cu. Note for every mole of Cu2S we get 2 moles of Cu. Thus,

0.0314 mo Cu2S x <u>   2 mol Cu     </u> = 0.0628 mole Cu<u>
</u>                                1 mol Cu2S

Lastly, we convert mole Cu to g Cu via multiplying by Cu's MW.

0.0628 mole Cu x <u>63.546 g Cu  </u> = 3.99 g Cu or 4 g Cu<u>
</u>                                1 mole Cu

<em>ANSWER: 4 g Cu</em>



4 0
3 years ago
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if an electron is released during radioactive decay which type of Decay has taken place a gamma decay b beta decay c electromagn
olasank [31]

Answer:

hi

i hope you have a great day!

Explanation:

3 0
3 years ago
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Describe the role of earth's water system in the rock cycle
Oxana [17]
<span>Erosion by wind or water transports the rock particles and sediments to other sooner or later hitting the ocean.then the rocks form together to make sediment rock! :D</span>
7 0
3 years ago
What is the molarity of a solution containing 7.47 moles of solute in 4.31 liters of<br> solvent?
scoray [572]

Answer:

1.73 M

Explanation:

Molarity is moles per liter, so we need to divide 7.47 moles by 4.31 liters to get the molarity of the solution.

7.47/4.31 ≈ 1.73 M

5 0
3 years ago
The amount of 217 mg of an isotope is given by A(t) = 217 € -0.0171, where t is time in years since the initial amount of 217 mg
Maru [420]

The amount left after 20 years = 154.15 mg

<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually radioactive elements have an unstable atomic nucleus.  

The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles  

The decay formula for isotope :

\tt \large{\boxed{\bold{A(t)=217e^{-0.0171t}}}

Then for t=20 years, the amount left :

\tt A(t)=217e^{-0.0171\times 20}\\\\A(t)=154.15~mg

4 0
3 years ago
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