Name the following ionic compound KBr

A mixture contains 20% iron ions by mass. What mass of iron chloride (FeCl) would

omeli [17]

Mass of iron chloride (FeCl₂) : 22.68 g

<h3>Further explanation</h3>

Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements

In the same compound, although from different sources and formed by different processes, it will still have the same composition/comparison

With this law, we can calculate how many grams an element is needed to make a compound with a certain mass, as desired

<h3 />

$\tt mass~Fe=\dfrac{Ar~Fe}{MW~FeCl_2}\times mass~FeCl_2$

The iron ions in 50 g mixture :

$\tt 20\%\times 50~g=10~g$

$\tt 10=\dfrac{56}{127}\times mass~FeCl_2\\\\mass~FeCl_2=22.68~g$

8 0

3 years ago

If an ocean current is moving northward from Antarctica and up the coast of Africa, the climate of the coastal land would be....

Illusion [34]

Answer:

I would say a cooled

Explanation:

because yeah it's going to be cold when it travels from Antarctica but then it's going on towards Africa and yeah the water is going to get warmth but it's going to cool the land of Antarctica because it's so dry and hot and humid but the water is going to be more warmed because Antarctica the water is freezing so you're trying to ask the temperature of the water it'd be more warm if you're trying to ask kind of like the temperature of the land it would be cooled

8 0

3 years ago

An irregularly-shaped sample of aluminum (Al) is put on a balance and found to have a mass of 25.7 g. The student decides to use

Musya8 [376]

Answer:

4.14516129 g/mL

Explanation:

The density can be found with the following formula.

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

where $m$ is the mass and $v$ is the volume.

We know the mass is 25.7 grams. We must find the volume.

The volume is equal to the volume of water that is displaced. Subtract the initial volume from the final volume.

⇒ final volume - initial volume

The initial volume is 35.5 mL and the final volume is 41.7 mL.

⇒ 41.7 mL - 35.5 mL

⇒ 6.2 mL

The volume of the aluminum piece is 6.2 mL.

Now we know the mass and the volume.

$m= 25.7 g\\v=6.2 mL$

Substitute the values into the formula.

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

$d=\frac{25.7 g}{6.2 mL}$

$d=4.14516129 g/mL$

The density of the aluminum sample is 4.14516129 g/mL

6 0

3 years ago

Please help me solve? Chemistry

oee [108]

1000mL
1mL
100cm
1m
2,290,000 L

8 0

3 years ago

The pressure of a gas sample was measured to be 654 mmhg. What is the pressure in kpa? (1 atm = 1. 01325 × 10 5 pa)

Stels [109]

Taking into account the change of units, the pressure of the gas sample is 87.19 kPa.

<h3>What is rule of three</h3>

In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So: $c=\frac{cxb}{a}$

<h3>Pressure</h3>

The direct rule of three is the rule applied in this case where there is a change of units.

To perform in this case the conversion of units, you must first know that:

1 atm= 760 mmHg
1 atm = 1. 01325×10⁵ Pa= 101325 Pa
1 kPa= 1000 Pa

So, if 1 atm is 760 mmHg, how many atm equals 654 mmHg?

760 mmHg ⇒ 1 atm

654 mmHg ⇒ x

So: $x=\frac{654 mmHgx1 atm}{760 mmHg}$

Solving:

Now, if 101325 Pa are 1 atm, how many Pa equals 0.86 atm?

1 atm ⇒ 101325 Pa

0.86 atm ⇒ x

So: $x=\frac{0.86 atmx101325 Pa}{1 atm}$

Solving:

Finally, if 1 kPa is 1000 Pa, how many kPa equals 87,192.83 Pa?

1000 Pa ⇒ 1 kPa

87,192.83 Pa ⇒ x

So: $x=\frac{87,192.83 Pax1 kPa}{1000 Pa}$

Solving:

In summary, the pressure of the gas sample is 87.19 kPa.

Learn more with this example:

brainly.com/question/12482948

#SPJ12

5 0

2 years ago