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4 years ago

9

Match the term with its correct charge. Positive charge. Negative charge. Neutral: No electric charge. A. electron B. neutron C.

proton

1 answer:

Roman55 [17]4 years ago

4 0

negative charge is electron

positive charge is a proton

no charge is neutron

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Climate changes and earthquakes are B.effects of evolution

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Climate change consists of variations in the state of the weather and earthquakes (earth tremors) are due to the movement of tectonic plates. Both have existed since the formation of the Earth, due to a variety of natural circumstances, of man (for example, global warming generates climate change).

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3 years ago

Why is Gas Considered Carbon dioxied? (first to answer gets 100 points and brainliest

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3 years ago

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3 years ago

A volume of 40.0 mLmL of aqueous potassium hydroxide (KOHKOH) was titrated against a standard solution of sulfuric acid (H2SO4H2

Anni [7]

<u>Answer:</u> The concentration of KOH solution is 1.215 M

<u>Explanation:</u>

For the given chemical equation:

$2KOH(aq.)+H_2SO_4(aq.)\rightarrow K_2SO_4(aq.)+2H_2O(l)$

To calculate the concentration of base, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=2\\M_1=1.50M\\V_1=16.2mL\\n_2=1\\M_2=?M\\V_2=40.0mL$

Putting values in above equation, we get:

$2\times 1.50\times 16.2=1\times M_2\times 40.0\\\\M_2=\frac{2\times 1.50\times 16.2}{1\times 40.00}=1.215M$

Hence, the concentration of KOH solution is 1.215 M

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4 years ago