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3 years ago

1. Which of the following is not true of a covalent compound?

1 answer:

3 0

1. Which of the following is not true of a covalent compound?
It is made of only nonmetals.

2. What type of compound is almost always found as a solid?

Ionic compound is almost always found as a solid because they have very tightly bound structures.

3. Which of the following is not a characteristic of an ionic compound?

It is formed when atoms share electrons.

4. Covalent compounds are formed when
a nonmetal bonds with a nonmetal.

5. What is the relationship between a compound and the elements it is made from?

The compound may have properties that are very different from those of the elements.

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The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the radioactive decay of the carbon-14

Elena-2011 [213]

Answer:

Age of the atifact is $4.2\times 10^{2}$ years

Explanation:

For first -order radioactive decay- $A_{t}=A_{0}(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$
$A_{t}$ represents activity of radioactive nuclide after t time, $A_{0}$ represents initial activity of radioactive nuclide and $t_{\frac{1}{2}}$ represents half-life
Here, $A_{t}=19Bq$ , $A_{0}=20Bq$ and $t_{\frac{1}{2}}=5.73\times 10^{3}years$

Plug-in all the given values in the above equation-

$19=20\times (\frac{1}{2})^{\frac{t}{5.73\times 10^{3}}}$

or, $t=4.2\times 10^{2}$

So, age of the atifact is $4.2\times 10^{2}$ years

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3 years ago

Determining nitrogen balance in the clinical setting can be very valuable. To determine a client’s state of nitrogen balance, a

nikdorinn [45]

Answer:

We also need the nitrogen intake

Explanation:

The nitrogen balance is the difference between the nitrogen intake and nitrogen excreted. If this calculation is positive, the body grow; if it is negative, the body is decreased.

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2 years ago

If you increase the solute amount but keep the solution volume the same what

solmaris [256]

Answer: Molarity increases

Explanation:

Molarity, also known as concentration in moles/dm3 or g/dm3, is calculated by dividing the amount of solute dissolved by the volume of solvent. So, Molarity (c) = amount of solute (n) / volume (v)

i.e c = n/v

Hence, molarity is directly proportional to the amount of solute dissolved, and inversely proportional to the volume of solvent.

Thus, at same volume, any increase in solute amount increases molarity while a decrease will also decreases molarity.

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2 years ago

What is the boiling point of 5 ml of alcohol

NeTakaya

173.1f is the answer I believe, please let me know if I'm wrong then I would try to make up for it

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3 years ago

Imagine that A and B are cations and X, Y, and Z are anions, and that the following reactions occur:

Darina [25.2K]

Answer: AZ is the insoluble choice.

Explanation:

Z is an anion of a weak electronegative element. Hence, it bounds lightly with the highly electropositive cation A to form AZ.

AZ is not as ionic as AX, AY, BX, BY and BZ, so it is insoluble in water and yields precipitate on reaction with the salt of a weaker metal.

7 0

2 years ago