3. How would you classify the following? (time, mass, temperature, distance)

Bas_tet [7]

Answer:

Because the rock is irregularly shaped, you used the displacement method to measure its volume. You used <u>calculations</u> to indirectly find the <u>density</u> of the objects.

PLZ Brainliest

8 0

3 years ago

Acetonitrile (CH3CN) is an important industrial chemical. Among other things, it is used to make plastic moldings, which have mu

serg [7]

Answer:

One carbon atom and the nitrogen atom have nonzero formal charges.

Explanation:

The compound Acetonitrile has sixteen valence electrons as is easily San from its structure. It contains a carbon nitrogen triple bond with a lone pair of electrons on nitrogen. All atoms satisfy the octet rule and there is no hyper valent atom in the molecule.

The formal charge an carbon and nitrogen is calculated as follows;

No. of valence electron on atom - [non bonded electrons + no. of bonds]

Therefore, for carbon and nitrogen, we have;

formal charge on carbon = 4 - (0 + 4) = 0

formal charge on nitrogen = 5 - (2 + 3) = 0

Hence carbon and nitrogen both possess zero formal charges.

6 0

4 years ago

When silver crystallizes, it forms face-centered cubic cells. The unit cell edge length is 408.7 pm. Calculate the density of si

tester [92]

The density of silver can be calculated by using the following formula:

$d=\frac{m}{V}$

Here, m is mass and V is volume.

To calculate density, mass of silver needs to be calculated first.

In FCC, the number of Ag atoms in a unit cell will be 4, atomic mass of Ag is 107.87 g/mol and number of atoms in 1 mol are $6.023\times 10^{23}$ atoms, thus, mass can be calculated as follows:

$m=4 atoms\times \frac{1 mol}{6.023\times 10^{23}atoms}\times \frac{107.87 g}{mol}=7.163\times 10^{-22} g$ .

Now, volume can be calculated as follows:

$V=a^{3}$

First convert pm to cm:

$1 pm=10^{-10} cm$

Thus,

$408.7 pm=4.087\times 10^{-8} cm$

Putting the value to calculate volume,

$V=(4.087\times 10^{-8} cm)^{3}=6.83\times 10^{-23} cm^{3}$

Now, calculate density as follows:

$d=\frac{7.163\times 10^{-22}g}{6.627\times 10^{-23}cm^{3}}=10.5 g/cm^{3}$

Therefore, density of silver is $10.5 g/cm^{3}$ .

3 0

4 years ago

What happens to acetone molecules when you add heat to a beaker of liquid acetone? They gain a higher average kinetic energy. Th

iVinArrow [24]

When you heat up most substances it gives them more Kinetic energy and the substance becomes less arranged in an ordered state, further apart and move faster. therefore the answer is the first: They gain a higher average kinetic energy

Hope that helps :)

7 0

3 years ago

Magnesium has 2 valence electrons, and oxygen has 6 valence electrons. Which type of bonding is likely to occur between a magnes

musickatia [10]

Answer:

A. Ionic—Magnesium will give 2 electrons to oxygen, and both will become ions.

Explanation:

An ionic bond will form between the ions of both atoms. Ionic bonds forms when there is transfer of electrons between two atoms so as to achieve a noble configuration.

In the given problem, magnesium is a metal and highly electropositive. This implies that it will readily donate its valence electrons. Oxygen on the other hand is highly electronegative, to complete its outer shell configuration, it requires just two more electrons.

The transfer of the two electrons to the oxygen atom sets up an electrostatic force of attraction between the two ions and an ionic bond results.

3 0

3 years ago