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2 years ago

15

What atom has 35 protons and 47 neutrons ?

2 answers:

svet-max [94.6K]2 years ago

6 0

Answer:

Bromine

Explanation:

saw5 [17]2 years ago

3 0

Answer:

Bromine??

I think bromine is the answer but i may be wrong

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What is the reading on your balance and that of your partner?what do these values represent?

never [62]

These values may represent the amount of pulling force that we exert on each other or in other words exert forces on both parties.

The answer may differ as well but keep in mind the values should be equal.

Note:

The answer is not about helping each other or the "spring balance". We are not talking about the literal moral values instead we are talking about Chemistry and Science.

3 0

3 years ago

he equilibrium constant, Kc , for the following reaction is 7.00×10-5 at 673 K.NH4I(s) NH3(g) + HI(g)If an equilibrium mixture o

frosja888 [35]

<u>Answer:</u> The number of moles of HI in the solution is $1.24\times 10{-3}$ moles.

<u>Explanation:</u>

We are given:

$K_c=7.00\times 10^{-5}\\n_{NH_3}=0.405mol\\n_{NH_4I}=1.45mol\\V=4.90L$

To calculate the concentration of a substance, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$ ......(1)

Concentration of ammonia:

$[NH_3]=\frac{0.405mol}{4.90L}=0.083mol/L$

Concentration of ammonium iodide:

$[NH_4I]=\frac{1.45mol}{4.90L}=0.30mol/L$

For the given chemical reaction:

$NH_4I(s)\rightleftharpoons NH_3(g)+HI(g)$

The expression of $K_c$ for above equation follows:

$K_c=\frac{[HI][NH_3]}{[NH_4I]}$

Putting values in above equation, we get:

$7.0\times 10^{-5}=\frac{[HI]\times 0.083}{0.30}$

$[HI]=2.53\times 10^{-4}$

Calculating the moles of hydrogen iodide by using equation 1, we get:

$2.53\times 10^{-5}=\frac{\text{Moles of HI}}{4.9}\\\\\text{Moles of HI}=1.24\times 10^{-3}$

Hence, the number of moles of HI in the solution is $1.24\times 10{-3}$ moles.

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2 years ago

Cu has an anomalous electron configuration. write the observed electron configuration of cu.

xenn [34]

1s2 2s2 2p6 3s2 3p6 3d10 4s1

5 0

3 years ago

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Which one of the following does not describe an acid

Irina-Kira [14]

Answer:

C a sour tasting substance

Explanation:

The taste of an acid does not matter. An acid is an aqueous solution meaning that it is solvent in water.

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2 years ago

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It has more protons than Cl but less than K

timama [110]

Answer: Argon (Ar), which has 18 protons.

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3 years ago