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4 years ago

Select all the species that are ions. HCl NaCl NH4+ H2PO4- CCl4 H3O+

Chemistry

1 answer:

nata0808 [166]4 years ago

4 0

Answer:

NH₄⁺

H₂PO₄⁻

H₃O⁺

Explanation:

An ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Ion may be positively charged "cation" or negatively charged "anion".

Neutral molecule has a net charge of zero.

So, the species that are ions are:

NH₄⁺

H₂PO₄⁻

H₃O⁺

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4 years ago

A 100 gram block is placed on a scale that is known to have a 12% error. What will the scale read?

sesenic [268]

The scale will read 112 grams.

Why?

Since we already know the percent error of the scale (12%) and we also know the mass of the block that is placed on the scale, we can calculate what will be the read of the scale by using the following formula:

$ScaleRead=100g+(100g*\frac{12}{100})=100g+(100g*0.12)=100g+12g\\\\ScaleRead=112g$

We can see that the scale will read 112 grams.

Let's verify that we are right by using the following formula to verify if the obtained value for the scale read will be 12%:

$PercentError=\frac{ActualValue-RealValue}{RealValue}*100=\frac{112g-100g}{100g}*100\\\\PercentError=\frac{12g}{100g}*100=0.12*100=12(percent)$

Hence, we can see that the scale will read 112 grams.

Have a nice day!

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4 years ago

How can one determine that a redox reaction will be nonspontaneous?

fenix001 [56]

Answer:

A redox reaction is spontaneous if the standard electrode potential for the redox reaction, Eo(redox reaction), is positive. ...

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Explanation:

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3 years ago