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Vinvika [58]
3 years ago
14

How can molecules with polar bonds be nonpolar?

Chemistry
1 answer:
Alexandra [31]3 years ago
5 0
A molecule can<span> possess </span>polar bonds<span> and still be </span>non polar. If the polar bonds<span> are evenly (or symmetrically) distributed, the </span>bond<span> dipoles cancel and </span>do<span> not create a molecular dipole.</span>
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Determine whether each described process is endothermic or exothermic.
FromTheMoon [43]

Answer:

Ice melts into liquid water- endothermic

A process with a calculated positive q - endothermic

Wood burns in a fireplace - exothermic

A process with a calculated negative q - exothermic

Acid and base are mixed, making test tube feel hot - exothermic

Solid dissolves into solution, making ice pack feel cold - endothermic

Explanation:

An endothermic process is one in which heat is absorbed from the surroundings. The absorption of heat means that heat is removed from the surroundings hence the surroundings feel cool. When heat is absorbed, q is positive.

An exothermic process is one in which heat is released to the surroundings. The evolution of heat means that heat is released into the surroundings hence the surroundings feel hot . When heat is evolved, q is negative.

7 0
2 years ago
If an object has a mass of 250 grams and a volume of 5 milliliters, what is the density of the object?
ycow [4]

Answer:

<h2>50 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{250}{5}  \\

We have the final answer as

<h3>50 g/mL</h3>

Hope this helps you

4 0
3 years ago
Which element, mg or al, will have the higher first ionization energy and which will have the higher third ionization energy?
vesna_86 [32]
Al will have a higher first and third ionization energy
8 0
3 years ago
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the
igomit [66]

Answer:

When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.

4 0
3 years ago
A simple machine produces 25 joules of output work for every 50 joules of input work . What is the efficiency of this machine ?
nataly862011 [7]
2:1, output is half the input
8 0
3 years ago
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