All categories

3 years ago

Can someone do my homework pls!

Chemistry

2 answers:

Elza [17]3 years ago

7 0

Answer:

Hi, a cheerful teen willing to help,

wishing you a splendiferous day ahead...

Explanation:

1ai. The most dense is Tungsten.

1aii. The least dense is Sodium.

1aiii. The strongest is Tungsten.

1b. All metals conduct electricity.

They are all magnetic except magnetic.

and all solid at room temperature except mercury.

1c. Mercury is a liquid at room temperature.

1d. Tungsten is used as filament for light bulbs due to its high melting point and it doesn't oxidize, this the filament won't melt.

1e. The lump of gold will sink because it is more dense than mercury.

Rzqust [24]3 years ago

5 0

Answer:

He or she is rightttttttttttt

You might be interested in

Which of the following statements is false? Vapor refers to a gas formed by evaporation of a liquid or sublimation of a solid. S

tamaranim1 [39]

Answer: Option (b) is the correct answer.

Explanation:

Vapor refers to the conversion of liquid state of a substance into gaseous state or conversion of a solid state into gaseous state.

Density of ice (solid state of water) is less than the density of liquid state of water. This is because there are spaces present in the crystal lattice of ice due to which it has less mass.

As a result, it has low density and hence, it floats on the surface of water.

Thus, we can conclude that the statement Solid water (ice), unlike most substances, is denser than its liquid form (water), is false.

6 0

3 years ago

A compound with the empirical formula CH 2 CH2 has a molar mass of 126 126 g/mol. What is the molecular formula for this compoun

Pachacha [2.7K]

<u>Answer:</u> The molecular formula of the compound is $C_9H_{18}$

<u>Explanation:</u>

We are given:

Empirical formula of the compound = $CH_2$

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

$n=\frac{\text{Molecular mass}}{\text{Empirical mass}}$

We are given:

Mass of molecular formula = 126 g/mol

Mass of empirical formula = $12+(2\times 1)]=14g/mol$

Putting values in above equation, we get:

$n=\frac{126g/mol}{14g/mol}=9$

Multiplying this valency by the subscript of every element of empirical formula, we get:

$C_{(9\times 1)}H_{(9\times 2)}=C_9H_{18}$

Hence, the molecular formula of the compound is $C_9H_{18}$

6 0

3 years ago

Which statement is correct for all elements in the same group

jeka94

They have the same number of electrons in the highest occupied energy level. :)

4 0

2 years ago

Hey what do you mean by an acid ?

lbvjy [14]

Answer: What? do you mean

Explanation:

4 0

2 years ago

Read 2 more answers

What do u all recommend for chemistry to get a head start because i am a very slow learner.

UkoKoshka [18]

Read the book, don't slack off and do ALL the homeworks. It's simple. You just gotta stay ahead and if you need help, ask! Don't be afraid to! Good luck!

8 0

3 years ago