All categories

2 years ago

Which phrase describes an iron ore?

Chemistry

1 answer:

Alecsey [184]2 years ago

6 0

Answer:

a rock containing a lot of iron

Explanation:

Iron ore is an ore of iron and this implies a rock that contains a substantial amount of iron.

An ore is a naturally occurring rock type that hosts a certain type of metal or solid that can be won at profit with some gangue minerals. Iron ore is one such type of substance from which significant amount of iron can be extracted for use by man. The remaining part quite not useful is the gangue.

You might be interested in

A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the low

dybincka [34]

It would be d bc when it’s at its lowest point it means not that much energy and that would be its lowest point which is D

6 0

2 years ago

Read 2 more answers

A 100.0mL bubble of hot gases at 225 C and 1.80 atm escapes from an active volcano, what is the new volume of the bubble outside

Inessa05 [86]

<h3>Answer:</h3>

112.08 mL

<h3>Explanation:</h3>

From the question we are given;

Initial volume, V1 = 100.0 mL
Initial temperature, T1 = 225°C, but K = °C + 273.15

thus, T1 = 498.15 K

Initial pressure, P1 = 1.80 atm
Final temperature , T2 = -25°C

= 248.15 K

Final pressure, P2 = 0.80 atm

We are required to calculate the new volume of the gases;

According to the combined gas law equation;

$\frac{P1V1}{T1}=\frac{P2V2}{T2}$

Rearranging the formula;

$V2=\frac{P1V1T2}{T1P2}$

Therefore;

$V2=\frac{(1.80atm)(100mL)(248.15K)}{(498.15K)(0.80atm)}$

$V2=112.08mL$

Therefore, the new volume of the gas is 112.08 mL

8 0

2 years ago

A chemical engineer must report the average volume of a certain pollutant produced by the plants under her supervision. Here are

AfilCa [17]

Answer:

The chemical engineer should report average volume of 15.34 L.

Explanation:

Volume of Macon = 0.519 L

Volume of Allegheny = 44.67 L

Volume of Doheny = 0.826 L

Average of the volume of the pollutants:

$\frac{0.519 L+44.67 L+ 0.826L}{3}=\frac{46.015 L}{3}=15.33833 L$

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

Here the 44.67 has two significant digit after decimal point.So the answer will be reported as in with 2 significant figures after decimal point.

$15.33833 L\approx 15.34 L$

The chemical engineer should report average volume of 15.34 L.

5 0

2 years ago

Which statement best describes the atoms of the gas neon? O They slide past each other. They move freely in all directions. O. T

timofeeve [1]

Answer:

The statement that describes the gas of neon is

1. They are far apart.

2. They move constantly.

3. They move freely in all directions.

4. They move at high speed. Neon is termed as a chemical element. It is a noble gas.

It is odorless, colorless, inert monatomic gas when under standard condition. Neon is the second of the rare gases to be discovered. The second lightest inert gas.

Explanation:i just know oki

7 0

2 years ago

Read 2 more answers

32. Mercury has an atomic mass of 200.59 amu. Calculate the a. Mass of 3.0 x 1023 atoms. b. Number of atoms in one nanogram of M

Radda [10]

a.200.59 amu of mercury contains = 6.02 * 1023 molecules

Mass for 3.0 * 1023 molecules = (3.0 * 1023 * 200.59) /6.02 * 1023

= 100.29 amu

Thus, mass for 3.0 * 1023 molecules is 100.29 amu

b.As, 200.59 g mercury contains = 6.02 * 1023 atoms

1 g mercury contains = (6.02 * 1023 /200) atoms

= 3.01 * 1021 atoms

Thus, 1 ng mercury contains = (3.01 * 1021) / 109

= 3.01 * 1012 atoms

Thus, 3.0 * 1012 atoms present in 1 ng mercury

6 0

2 years ago

Read 2 more answers