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Rudik [331]
1 year ago
6

When magnesium ribbon is placed in sulfuric acid, a chemical reaction takes place and heat energy is given off. Liang and Naraba

atar are planning an investigation into the effect of the length of magnesium ribbon on the increase in temperature. They decide to carry out some preliminary work.
Explain what preliminary work they could do and how this would help them plan their investigation.

please give a genuine aswer ​
Chemistry
1 answer:
kolezko [41]1 year ago
6 0

Answer:

this is the answer

I hope it helps you although

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Identify the true statements about surface tension. Molecules along the surface of a liquid behave differently than those in the
Alexxandr [17]

Answer:

Molecules along the surface of a liquid behave differently than those in the bulk liquid.

Cohesive forces attract the molecules of the liquid to one another.

Water forming a droplet as it falls from a faucet is a primary example of surface tension.

Explanation:

Surface tension is the force that stretches the liquid surface. This force acts normal to the surface. It is the downward force that acts on the surface of the liquids which is due to the cohesive forces of the liquids.

The water molecules are bonded by a strong hydrogen bond force which is between hydrogen atom and the electronegative oxygen atom. At the surface the water molecules are attracted strongly by other water molecules which lies below the surface and are stretched at the surface. Thus the water molecules at the surface acts differently than in the bulk liquid.

Mercury have a strong cohesive force than the water and have a higher surface tension force than the water.

Surface water acquires minimum surface area, hence acquiring spherical shape of water.

4 0
1 year ago
The question is on the pic, thanks :)
Inessa05 [86]
It’s the BOA not the dog or kangaroo
8 0
1 year ago
A scientist is at the hospital visiting a friend's young daughter, who has been
slava [35]

Answer:

D

Explanation:

The scientist identifies the need to make a drug to cure the respiratory illnesses.

5 0
2 years ago
Bella wants to know which mode of transportation is the fastest for getting from her home to the grocery store. She cans drive h
MrRissso [65]

Is this multiple choice? Is there any educational problem that really needs to be solved?

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7 0
2 years ago
Determine the normality of the following solutions note the species of interest is H 95 g of PO4 3- in 100mL solution
Aliun [14]

Answer : The normality of the solution is, 30.006 N

Explanation :

Normality : It is defined as the number of gram equivalent of solute present in one liter of the solution.

Mathematical expression of normality is:

\text{Normality}=\frac{\text{Gram equivalent of solute}}{\text{Volume of solution in liter}}

or,

\text{Normality}=\frac{\text{Weight of solute}}{\text{Equivalent weight of solute}\times \text{Volume of solution in liter}}

First we have to calculate the equivalent weight of solute.

Molar mass of solute PO_4^{3-} = 94.97 g/mole

\text{Equivalent weight of solute}=\frac{\text{Molar mass of solute}}{\text{charge of the ion}}=\frac{94.97}{3}=31.66g.eq

Now we have to calculate the normality of solution.

\text{Normality}=\frac{95g}{31.66g.eq\times 0.1L}=30.006eq/L

Therefore, the normality of the solution is, 30.006 N

5 0
1 year ago
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