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slavikrds [6]
3 years ago
14

What components are needed in a expeirment

Chemistry
1 answer:
AnnyKZ [126]3 years ago
7 0
Independent and dependent variables and constants
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A chemist is given a 3.00M solution of KBr and needs to measure out 0.733 moles of this solution. How many mL of the 3.00M KBr s
Charra [1.4K]

In order to measure 0.733 moles of KBr from a 3.00 M solution, the chemist needs 244 mL of solution.

<h3>What is molarity?</h3>

Molarity (M) is a unit of concentration of solutions, and it is defined as the moles of a solute per liters of a solution.

  • Step 1: Calculate the liters of solution required.

A chemist has a 3.00 M KBr solution and wants to measure 0.733 moles of KBr. The required volume is:

0.733 mol × (1 L/3.00 mol) = 0.244 L

  • Step 2: Convert 0.244 L to mL.

We will use the conversion factor 1 L = 1000 mL.

0.244 L × (1000 mL/1 L) = 244 mL

In order to measure 0.733 moles of KBr from a 3.00 M solution, the chemist needs 244 mL of solution.

Learn more about molarity here: brainly.com/question/9118107

7 0
2 years ago
4. What is the dependent variable in the statement below?
Naddik [55]
A. Amount of sleep, since it depends on how much coffee she drinks
4 0
3 years ago
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Which element would you expect to form an ionic compound when combined with bromine (Br)?
daser333 [38]
Ionic bond is formed due to the transfer of electrons from one atom to another so that all atoms involved in the bond would become stable (with 8 electrons in the outermost level)

Now, for bromine, it has 35 electrons. This means that bromine has 7 valence electrons in the outermost level. Therefore, bromine needs to gain one electron in order to become stable.

Bromine can react with elements from:
group 1: each element in group 1 needs to lose one electron to become stable. Therefore, one bromine atom can form an ionic bond when combined with an atom of an element from group 1 (element in group 1 loses its electron for bromine atom).
group 2: each element in group 2 needs to lose two electrons to become stable. Therefore, two bromine atoms can form ionic bonds when combined with an atom of an element from group 2 (element in group 2 loses two electrons, one for each bromine atom).
group 3: each element in group 3 needs to lose three electrons to become stable. Therefore, three bromine atoms can form ionic bonds when combined with an atom of an element from group 1 (element in group 3 loses three electrons, one for each bromine atom).

Since no choices are given , I cannot tell the exact choice. But the correct one would be the element from either group 1 , 2 or 3.
3 0
3 years ago
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A molecule of nitrogen gas consists of two nitrogen atoms joined together. Write the formula of nitrogen gas.
Xelga [282]
<span>The formula for nitrogen gas is N2<span>

your welcome!</span></span>
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3 years ago
Describe 3 diffferences between animal and plant cell's.
IrinaK [193]
Animal cells are round, plant cells are circle (most of them) Plant cells have a rigid cell wall that surrounds the cell membrane. Animal cells do not have a cell wall.
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