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4 years ago

Brass is a solid solution composed of zinc and copper. Brass is classified as a (n): A.colloid B.suspension C.solution D.alloy

Chemistry

1 answer:

melamori03 [73]4 years ago

4 0

Brass is an alloy, or a combination of two (or more) metals.

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sample of saline contains 45 ml of saline in 128 ml of water. What is the percent by volume of the solution?

Ludmilka [50]

Answer:

35.15%

Explanation:

$\frac{45}{128}=0.3515=35.15%$ %

5 0

3 years ago

Write and balance molecular equations for the following reactions between aqueous solutions. You will need to decide on the form

musickatia [10]

Answer:

This is the balanced equation:

Pb(NO₃)₂ (aq) + 2NaI (aq) → 2NaNO₃ (aq) + PbI₂ (s) ↓

Explanation:

This are the reactants:

PbNO₃

NaI

Iodide can react to Pb²⁺ to make a solid compound.

4 0

4 years ago

If carbon-15 has a half-life of 2.5 seconds, % of the sample would still be

kramer

Answer:

After 5 second 25% C-15 will remain.

Explanation:

Given data:

Half life of C-15 = 2.5 sec

Original amount = 100%

Sample remain after 5 sec = ?

Solution:

Number of half lives = T elapsed / half life

Number of half lives = 5 sec / 2.5 sec

Number of half lives = 2

At time zero = 100%

At first half life = 100%/2 = 50%

At second half life = 50%/2 = 25%

Thus after 5 second 25% C-15 will remain.

8 0

4 years ago

K + Li2O what is the product

shutvik [7]

Answer:

2K + Li2O → 2Li + K2O

3 0

3 years ago

Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its

TiliK225 [7]

The addition of hydrogen carbonate to bromothymol blue turns the solution blue. Thus, option B is correct.

The balanced equation for the dissociation of bromothymol blue is:

$\rm HC_2H_3O_2\;\leftrightharpoons H^+\;+\;C_2H_3O_2^-$

The color of dissociated form is yellow and undissociated form is blue.

<h3>What is the final color of solution?</h3>

The addition of hydrogen carbonate results in the dissociated ions as:

$\rm H_2CO_3\;\rightarrow\;2\;H^+\;+\;CO_3^-$

The dissociation results in the increased hydrogen ion concentration. The undissociated form in the reaction mixture increases.

Thus, the color of the solution will turn blue. Hence, option B is correct.

Learn more about bromothymol blue, here:

brainly.com/question/24319054

6 0

3 years ago