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ollegr [7]
4 years ago
15

What does it mean to control variables in an experiment 

Chemistry
1 answer:
devlian [24]4 years ago
6 0

Answer:

Essentially, a control variable is what is kept the same throughout the experiment, and it is not of primary concern in the experimental outcome. Any change in a control variable in an experiment would invalidate the correlation of dependent variables (DV) to the independent variable (IV), thus skewing the results.

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How many atoms of each element are in the chemical formula P2O5?
tigry1 [53]
<span>2 phosphorus and 5 oxygen</span>
4 0
3 years ago
Read 2 more answers
What is the measure of force per unit area.
Brut [27]

Pressure

Explanation:

Pressure is a measure of force per unit area.

Pressure is defined as the force exerted on a body across a unit area. The unit of pressure is N/m² or Pascal.

                Pressure = \frac{Force}{Area}

The more the force acting on a body the more the pressure felt. A small surface area and a large force increases pressure on a body.

it is right to say that pressure is proportional to force but inversely proportional to area.

Learn more:

Pressure brainly.com/question/9805263

#learnwithBrainly

4 0
3 years ago
Explain whether each of the possible reactions listed below will occur. For those that will, predict what the products will be.
Alex777 [14]

Answer:

Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)

Sn(s) + O2(g) →SnO2(s)

Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)

Cu (s) + HCl(aq) → can not occur

Explanation:

Metals reacts with liquid water to yield the corresponding metallic hydroxide and hydrogen gas as shown above; Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)

Tin reacts with oxygen to yield tin (IV) oxide. This is an oxidation reaction as shown; Sn(s) + O2(g) →SnO2(s)

The reaction between Cd and Pb(NO3)2 is a single replacement reaction. It is possible because Cd is above Pb in the electrochemical series. Hence the reaction occurs thus; Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)

Copper does not displace hydrogen from dilute acids (such as HCl) since copper is lower than hydrogen in the electrochemical series hence the reaction does  not occur.

3 0
3 years ago
Determine if the following two structures are
kherson [118]

Answer:

Constitutional isomers vs stereoisomers

Structural (constitutional) isomers have the same molecular formula but a different bonding arrangement among the atoms. Stereoisomers have identical molecular formulas and arrangements of atoms. They differ from each other only in the spatial orientation of groups in the molecule.

Explanation:

4 0
3 years ago
Pls help me thx! I would appreciate it!
inessss [21]

Answer:

Here just look at the pic here

Explanation:

7 0
3 years ago
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