3 years ago

.org Questions What are some of the uses for gold described in the passage?

Chemistry

1 answer:

lesya692 [45]3 years ago

4 0

What’s the passage??

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What best describes a molecule

dybincka [34]

Answer:

a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction

Hope this helps :)

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3 years ago

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A solution of NaOH is titrated with H2SO4. It is found that 20.05 mL of 0.3564 M H2SO4 solution is equivalent to 43.42 mL of NaO

Darya [45]

Answer : The concentration of NaOH is, 0.336 M

Explanation:

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 NaOH.

We are given:

$n_1=2\\M_1=0.3564M\\V_1=20.05mL\\n_2=1\\M_2=?\\V_2=43.42mL$

Putting values in above equation, we get:

$2\times 0.3564M\times 20.05mL=1\times M_2\times 43.42mL$

$M_2=0.336M$

Thus, the concentration of NaOH is, 0.336 M

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3 years ago

56. The electron configuration for phosphorous is [Ar]3s23p4.<br> a. TRUE<br> b. FALSE

melomori [17]

Answer:

False

Explanation:

7 0

2 years ago

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True or False? Not all compounds will dissolve in water.

In-s [12.5K]

Answer:

False

Explanation:

Polar molecules and ionic compounds dissolve in water, not nonpolar molecules

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3 years ago

An element whose third shell contains two <br> p<br> electrons

pentagon [3]

Maybe sodium? becasue its an element and I would like some points... sorryy:((((

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3 years ago

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