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pickupchik [31]
3 years ago
9

In a controlled scientific experiment, a scientist A. alters one test variable (independent variable) and observes the effects o

n other test variables (independent variables). B. alters one outcome variable (dependent variable) and observes the effects on other outcome variable (dependent variables). C. alters the test variable (independent variable) and observes the effects on the outcome variable (dependent variable).
Chemistry
1 answer:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

C )

Explanation:

Controlled scientific experiment tests scientific assumption (hypothesis), under controlled conditions.

In controlled scientific experiment, alters the test variable (independent variable) and observes the effects on the outcome variable (dependent variable).

Eg : Studying impact of sunlight on plant's group, where former independent variable is altered & its effects on dependent outcome variable is observed.

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Determine the oxidation state of each of the following species.<br> Pb2+
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Answer:

Pb oxidation number is +2

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2Ag = +2 since O = -2 ; each Ag = +1

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3 years ago
Name this compound please​
koban [17]

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The answer to your question is butanal

Explanation:

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2 years ago
Please i need the answer im dying here ;-
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8 0
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Read 2 more answers
Type the correct answer in the box. sodium carbonate (na2co3) is sometimes used as a water-softening agent. suppose that a worke
Natali [406]

The mass of dissolved sodium carbonate is 109 g of Na₂CO₃.

<h3>What is a solution ?</h3>

A solution consists of two elements , a solute and a solvent .

A solute is dissolved into solvent to make a solution.

The concentration of a solution is measure by Molarity , Molality , mass% etc.

It is given in the question that

sodium carbonate ( Na₂CO₃) is sometimes used as a water-softening agent

a worker prepares a 0.724 m solution of  Na₂CO₃ and water.

the volume of the solution is 1.421 liters.

Mass of dissolved sodium carbonate is grams =?

Concentration = 0.724 M

Volume = 1.421 liters

Molecular mass of  Na₂CO₃  = 106 g

The mass of the solute needs to be determined

Molarity = moles / volume\

moles = Molarity x volume

Substituting the values

moles = 0.724 x 1.421

moles = 1.029

1 mol of Na₂CO₃ means  106 gm of  Na₂CO₃

Then 1.029 moles will mean 1.029 * 106

109.07 gm

Therefore , the mass of dissolved sodium carbonate is 109 grams.

To know more about Solution

brainly.com/question/1616939

#SPJ1

         

7 0
2 years ago
13. Which of the following is NOT characteristic of metals?
Elanso [62]
?? whats the question??
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