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Korvikt [17]
3 years ago
9

What appearance of an acidic analyte solution containing phenolphthalein indicates the endpoint of titration with a basic soluti

on?
Chemistry
1 answer:
Svetllana [295]3 years ago
8 0

Answer:

When the solution becomes colorless

Explanation:

phenolphthalein in a base gives a purple colour. As the acid is introduced, the purple color begins to fade away. The end point of the reaction is attained when the solution becomes colorless.

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a set of pulleys is used to lift a piano weighing 1,000 netwons. the piano is lifted 3 meters in 60 seconds. How much power is u
DENIUS [597]

P = W/t

P = F.s/t

P = 1000.3/60

P = 50 watt

6 0
2 years ago
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The density of water is 1 g/cm3(1 gram per cubic centimeter); using this fact as a reference & Table c , how would you deter
NISA [10]

Answer:

Explanation:

Any densities less than 1g/cm3 will float, while objects with densities over 1g/cm3 will sink.

6 0
3 years ago
The device shows the relative humidity at 22°
sergeinik [125]
The relative humidity shows us saturation of water in air. Since it is 58% and not 100% we have to scale density that we were given when humidity is 100%.

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at 58% it will be:
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4 0
3 years ago
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After Callie obtained her original results, she wanted to dig deeper. She determined that the germinating corn seed had utilized
Airida [17]

Answer:

Callie expect 600 molecules of CO2 to have been released as a waste during the same amount of time.

Explanation:

During cellular respiration 1 molecule of glucose undergoes oxidation to form 6 molecules of CO2 as a waste product.

     According to the question callie determined that the germinating corn seed had utilized 100 molecules of glucose.

    So 100 molecules of glucose will release 100×6=600 molecules of CO2 as a waste product.

8 0
3 years ago
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How does 2 Na (s) + Cl2 (g) = NaCl (s) represent the coefficient in the chemical equation
Elenna [48]

Answer:

The 2 would be placed in front of the reactant Na and in front of the product NaCl

2Na + Cl2 = 2NaCl

Explanation:

This is because the ratio of elements needs to be balanced on both sides.

On the reactants side, there are 2 Na molecules and 2 Cl molecules

On the products side, there are 2 Na molecules and 2 Cl molecules

So, now the equation is balanced

3 0
2 years ago
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