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4 years ago

What chemical species are produced when borax dissolves in water?

Chemistry

1 answer:

Alika [10]4 years ago

7 0

It hydrolysed to form sodium borate, NaB(OH)4 $NaB(OH)_4$ and boric acid.

<u>Explanation</u>

Borax is an important mineral, boron compound and is a salt of 'boric acid'. The powdered borax consists of soft colourless crystals that will dissolve in water. It is used in many detergents, enamel glazes and cosmetics.

When mixed with water it produces to form an ion known as the borate ion. Thus hydrolysed to form sodium borate, $NaB(OH)_4$ and boric acid that is chemically written as B(OH)3 or $H_3BO_3.$

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How many grams are in 3.79 moles of H2SO4?

mezya [45]

Answer:

371.71 g

Explanation:

1 mol H2SO4 = 98.07 g

98.07 g * 3.79 = 371.71 g

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3 years ago

One of the hazards of nuclear explosions is the generation of 90Sr andits subsequent incorporation in place of calcium in bones.

Illusion [34]

Explanation:

Initial mass of the isotope 90-Sr in baby= 1.00 μg

Formula used :

$N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$N_o$ = initial mass of isotope

N = mass of the parent isotope left after the time, (t)

$t_{\frac{1}{2}}$ = half life of the isotope = 28.1 years

$\lambda$ = rate constant

$N=N_o\times e^{-(\frac{0.693}{t_{1/2}})\times t}$

a) Time taken by the sample, t = 18 years

$N=1.00 \mu g\times e^{-\frac{0.693}{28.1 years}\times 18 years}$

$N = 0.6415 \mu g$

0.6415 μg will remain after 18 years.

b) Time taken by the sample, t = 70 years

$N=1.00 \mu g\times e^{-\frac{0.693}{28.1 years}\times 70 years}$

$N = 0.1779\mu g$

0.1779 μg will remain after 70 years.

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3 years ago

What colors do you see actually make up white light?

tia_tia [17]

All wavelengths/colours that are visible make up white light. From violet (between 380 nm and 450 nm) to red (between 400 nm and 700 nm).

7 0

3 years ago

Read 2 more answers

Suppose you wanted to dissolve 40.0 g NaOH in enough H2O to make 6.00 dm3 of solution

dezoksy [38]

Molarity of solution = 1.6 M

<h3>Further explanation</h3>

Given

40 g NaOH

6 L solution

Required

Steps to solve the problem of molarity

Solution

No additional information about the question.

If you want to make the solution above, then we just need to put the existing NaOH (40 g) into 6 L of water, then do the stirring (in a warm temperature above the hot plate will speed up the NaOH dissolving process)

But if you want to know the molarity of a solution, then