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Crazy boy [7]
3 years ago
13

When you test starch with Barfoed’s reagent, what would be the answer, positive or negative?

Chemistry
1 answer:
rewona [7]3 years ago
7 0

Answer:

It would test positive.

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A graduated cylinder was filled to 20.3 mL with water. A solid object weighing 73.05 g was immersed in the water, raising the me
victus00 [196]

The density of the solid object will be 2.63 g/mL

<h3>What is density?</h3>

Density of objects = mass/volume.

Recall that an object will always displace its own volume when placed in a liquid.

Volume of the solid object = Cylinder reading after immersing the object in the water - cylinder reading before immersing the object in the water.

             = 48.1 - 20.4

                  = 27.8 mL

Mass of the solid object = 73.05 g

Density of the object = 73.05/27.8

                                         = 2.63 g/mL

More on density can be found here: brainly.com/question/15164682

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3 0
1 year ago
Balance the following Chemical Equation:<br> NaBr +CaCl2-&gt; NaCl+ CaBr2
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First write all of the compounds/atoms in either side then fill in existing values and balance


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Na- 1
Cl- 1
Ca-1
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Balance to get

2NaBr+CaCl2=2NaCl+CaBr2
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3 years ago
The reaction below is at equilibrium. What would happen if more sodium<br> were added?
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As the temperature of a liquid increases, its viscosity decreases.
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