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3 years ago

A biologist who is measuring the length of salmon as they travel upstream is collecting qualitative data. True or false ?

2 answers:

4 0

The answer is false because qualitative data is describing something with words and quantitative data is describing something with numbers.

Vladimir [108]3 years ago

3 0

Answer: False

Explanation:

Qualitative data is one which can be observed with our senses such as sight, smell, touch, taste, and hearing. Qualitative observations do not involve any measurement. Example: Colour of an object

Quantitative data is one which involves measurement of data in numbers. Example: speed of an object

As the biologist is measuring the length of salmon as they travel upstream , it measures data in numbers and hence is a quantitative data and not a qualitative data.

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What is the net ionic equation for the reaction of solid iron with aqueous copper sulfate?

lozanna [386]

This is a single replacement reaction. So the final products are a metal and a salt with replaced cation. In this case, the final products are copper (metal) and iron sulfate (salt).

8 0

2 years ago

Heart, 5 stars, and Brainiest if right! Answer needed ASAP PLEASE!

iren2701 [21]

Answer:

The answer is B. balanced forces

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2 years ago

The bonds of the product store 27 KJ more energy than the bonds of the reactants how is energy conserved during this reaction

Blababa [14]

If the bonds of the product store 27 KJ more energy than the bonds of the reactants, It means the surroundings absorb 27 kj of energy from the reaction system Hence, Option (D) is the correct answer

<h3>What is the Exothermic reaction ?</h3>

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.

The bonds of the product store 27 KJ more energy than the bonds of the reactants, It means that energy has been absorbed by the surrounding as the product formed is more stable due to more stronger bond

This can be inferred from more stored energy with in the bonds and Thus, It is a exothermic reaction.Hence, Option (D) is the correct answer

Learn more about exothermic reaction here ;

brainly.com/question/9799465

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6 0

1 year ago

A student puts 0.020 mol of methyl methanoate into an empty and rigid 1.0 L vessel at 450 K. The pressure is measured to be 0.74

stellarik [79]

Explanation:

Starting moles of ethanol acid = 0.020 mol

At the equilibrium 50 % of the ethanol acid molecules reacted

∴ Moles of ethanol acid reacted = 0.020 mol * 50 %/100 %

= 0.010 mol

Moles of ethanol acid remain = 0.020 mol + 0.010 mol = 0.010 mol

Moles of the product $(CH3COOH)^{2}$ gas formed are calculated as

0.010 mol CH3COOH * 1 mol $(CH3COOH)^{2}$ / 2 mol CH3COOH

= 0.005 mol $(CH3COOH)^{2}$

Therefore at the equilibrium total moles of gas present in the vessel are 0.010 mol CH3COOH and 0.005 mol $(CH3COOH)^{2}$

That is total gas moles at equilibrium = 0.010 mol + 0.005 mol = 0.015 mol

Now Calculate the pressure :

0.020 mol gas has pressure of 0.74 atm therefore at the same condition what will be the pressure exerted by 0.015 mol gas

P1/n1 = P2/n2

P2 = P1*n2 / n1

= 0.74 atm * 0.015 mol / 0.020 mol

= 0.555 atm

4 0

3 years ago

Hydrochloric acid reacts with sodium hydroxide to form water and sodium chloride. Hydrochloric acid is an extremely acidic, clea

olya-2409 [2.1K]

Answer:

I think it is a).

Explanation:

3 0

2 years ago