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Westkost [7]
3 years ago
12

What statement about halogens is true?

Chemistry
2 answers:
Leya [2.2K]3 years ago
8 0
D) I am 80% sure..........
likoan [24]3 years ago
7 0
The answer is actually A because a halogen is a non metal and exists as a single atom
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How many moles of a solute is present in 4.00L of an 8.30M solution​
Sladkaya [172]

Answer:

The number of moles of solute present in 4.00 L of an 8.30 M solution​ is 33.2

Explanation:

The Molarity (M) or Molar Concentration is the number of moles of solute per liter of solution; in other words it is the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

Molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units (\frac{moles}{liter})  or M.

In this case:

  • molarity= 8.30 M
  • number of moles of solute= ?
  • volume= 4.00 L

Replacing:

8.30 M=\frac{number of moles of solute}{4 L}

Solving:

number of moles of solute= 8.30 M* 4 L= 8.30 \frac{moles}{liter} * 4 L

number of moles of solute =33.2

<u><em>The number of moles of solute present in 4.00 L of an 8.30 M solution​ is 33.2</em></u>

6 0
3 years ago
how many moles of iodine should be added to 750 grams of carbon tetrachloride to prepare a 0.24 m solution
aleksley [76]

Answer:

0.18 mol

Explanation:

Given data

  • Mass of carbon tetrachloride (solvent): 750 g
  • Molality of the solution: 0.24 m
  • Moles of iodine (solute): ?

Step 1: Convert the mass of the solvent to kilograms

We will use the relationship 1 kg = 1,000 g.

750g \times \frac{1kg}{1,000g} =0.750kg

Step 2: Calculate the moles of the solute

The molality is equal to the moles of solute divided by the kilograms of solvent. Then,

m = \frac{moles\ of\ solute }{kilograms\ of\ solvent} \\moles\ of\ solute = m \times kilograms\ of\ solvent = \frac{0.24mol}{kg}  \times 0.750kg = 0.18 mol

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3 years ago
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Schach [20]

Answer:

just watch the video, what does it start with, write that down for each trial, then what does it end with, then starting mass - ending mass is the change mass

7 0
3 years ago
Hydrangea plant's petals change to which colour on the addition of acids?
Black_prince [1.1K]
If it's a pH below six it's blue, if it's a pH between 6 and 7 then it would be purple, if it's above 7 it would be pink or red
4 0
4 years ago
Which of the following is the balanced form of the equation CH4 + O2 → CO2 + H2O?
lianna [129]
B) CH4 + 2O2=>CO2 + 2H2O
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3 years ago
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