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ludmilkaskok [199]
3 years ago
9

Please answer quick

Chemistry
1 answer:
JulijaS [17]3 years ago
6 0
The paper will turn red
You might be interested in
An indicator helps us to see the _____ during a titration experiment by causing a color change
Liula [17]

Answer:

Point of neutralization.

Explanation:

Indicators are used in titration experiments to show when the solution's pH is changing. For instance, a common indicator, phenolphthalein, turns pink in basic solutions, while it remains colorless in acidic solutions. The solution would turn a very light shade of pink when the pH reached above 7.

5 0
2 years ago
Juan measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 ml
const2013 [10]

Answer:

<h3>The answer is 5.0 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 10 g

volume = 2 mL

We have

density =  \frac{10}{2}  \\

We have the final answer as

<h3>5.0 g/mL</h3>

Hope this helps you

3 0
3 years ago
Read 2 more answers
During a laboratory experiment, a 2.36-gram sample of NaHCO3 was thermally decomposed. In this experiment, carbon dioxide and wa
eduard

Answer:

  • 90.7 %

Explanation:

<u>1) Chemical equation (given)</u>

  • 2NaHCO₃ → Na₂CO₃ + H₂CO₃

<u>2) Theoretical yield</u>

<u>a) Convert mass of NaHCO₃ to moles:</u>

  • n = mass in grams / molar mass
  • molar mass = 84.007 g/mol
  • n = 2.36 g / 84.007 g/mol = 0.02809 mol

<u>b) Mole ratio:</u>

  • 2 mol NaHCO₃ : 1 mol H₂CO₃

<u>c) Proportionality:</u>

  • 2 mol NaHCO₃ / mol H₂CO₃ = 0.02809 mol NaHCO₃ / x

       ⇒ x = 0.2809 / 2 mol H₂CO₃ = 0.01405 mol H₂CO₃

<u>3) Actual yield</u>

<u>a) Mass balance</u>: 2.36 g - 1.57 g = 0.79 g

<u>b) Convert 0.79 g of carbonic acid to number of moles</u>:

  • n = mass in grams / molar mass

  • molar mass = 62.03 g/mol

  • n = 0.79 g / 62.03 g/mol = 0.01274 mol

<u>4) Percentage yield, y (%)</u>

  • y (%) = actual yield / theoretical yield × 100

  • y (%) = 0.1274 mol / 0.1405 mol × 100 = 90.68%

The answer must show 3 significant figures, so y(%) = 90.7%.

5 0
2 years ago
Water can dissolve many other molecules. <br><br> Question 2 options:<br> True<br> False
nasty-shy [4]
The answer is true not false step by step explanation
4 0
2 years ago
Read 2 more answers
Determine the maximum number of electrons that can be found in each of the following subshells: a. 3s b. 3d c. 4p d. 4f.
monitta

Answer:

a. 2

b. 10

c. 6

d. 14

Explanation:

The maximum number of the electrons which can be filled in the s orbital are:- 2

The maximum number of the electrons which can be filled in the p orbital are:- 6

The maximum number of the electrons which can be filled in the d orbital are:- 10

The maximum number of the electrons which can be filled in the f orbital are:- 14

Thus,

a. 3s can have maximum of 2 electrons.

b. 3d can have maximum of 10 electrons.

c. 4p can have maximum of 6 electrons.

d. 4f can have maximum of 14 electrons.

3 0
3 years ago
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