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3 years ago

Element X reacts with iron to form two different compounds with the formulas FeX and Fe2X3.

1 answer:

6 0

The answer should be group 16. You can tell this because you know that X must be a negatively charged element due to the fact that it is in an ionic compound with iron. Iron is the metal (positively charged) so X must be negatively charged. Iron can have two charges: +2 or +3, so you know that that X must be -2 because it cancels in the first equation and in the second there are 2 irons. There is only one column with a negative 2 charge: group 16

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Why can filtration not be used to seperate a mixture of 2 liquids

Salsk061 [2.6K]

Answer:

Filtration works best when the solute isn't dissolve in the solvent. For instance, sand and water can be seperated through filtration because both compounds do not dissolve with each other. However, sugar and water would not be seperated through filtration as they dissolve with each other.

-google :)

3 0

4 years ago

Plzzz help do your best to answer these questions

vovikov84 [41]

The empirical formula is the simplest formula of a chemical compound.

To find the empirical formula, we take the following steps;

Divide the percentage by mass of each element by its relative atomic mass.
Divide the quotient of each by the lowest value obtained instep 1 above
Write the result of step 2 above as the subscript following each atom.

1) O - 88.10/16, H - 11.190/1

O - 5.5, H - 11.19

O - 5.5/5.5, H - 11.19/5.5

O - 1, H - 2

Empirical formula = OH2

2) C - 41.368/12 H - 8.101/1, N - 32.162/14, O - 18.369/16

C - 3, H - 8, N - 2, O - 1

C - 3/1, H - 8/1 N - 2/1 O - 1/1

C - 3, H - 8, N - 2, O - 1

Empirical formula = C3H8N2O

To obtain the molecular formula where n = number of atoms of each element;

Molecular weight = 174.204 g/mol

[ 3(12) + 8(1) + 2(14) + 16]n = 174

n= 174/88

n = 2 (to the nearest whole number)

Hence, we have;

[C3H8N2O]2

The molecular formula is C6H16N4O2

3) C - 19.999/12, H - 6.713/1, N - 46.646/14, O - 26.641/16

C - 2, H - 7, N - 3, O - 2

C - 2/2, H - 7/2, N - 3/2, O - 2/2

C - 1, H - 4, N - 2, O - 1

Empirical formula - CH4N2O

brainly.com/question/1363167

5 0

3 years ago

above shows a balloon full of gas which has a volume of 120.0ml at 300.0k assuming pressure remains constant , what is the voume

trasher [3.6K]

128 ml is the voume of the balloon if the temperature of the gas increases to 320.0k.

Explanation:

given that:

T1 (initial temperature) = 300K

V1 ( initial volume) = 120ml

T2 (final temperature) = 320 K

V2 (final volume) = ?

Pressure remained constant throughout the process.

From the equation

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

Since pressure is constant the equation will be:

$\frac{V1}{T1}$ = $\frac{V2}{T2}$

V2 = $\frac{V1 X T2}{T1}$

Putting the values in the above formula:

V2 = $\frac{120 X 320}{300}$

= 128 ml

128 ml is the volume of the gas if temperature increases from 3OO K to 320k

4 0

3 years ago

Solid Magnesium reacts with a Iron (II) Chloride solution ->

photoshop1234 [79]

Answer:

Magnesium + iron chloride → iron + magnesium chloride

Explanation:

It is the single replacement reaction.

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Molecular equation:

Magnesium + iron chloride → iron + magnesium chloride

Chemical equation:

Mg(s) + FeCl₂(aq) → MgCl₂(aq) + Fe(s)

Ionic equation:

Mg(s) + Fe²⁺(aq) + 2Cl⁻(aq) → Mg²⁺(aq) + 2Cl⁻(aq) + Fe(s)

Net ionic equation:

Mg(s) + Fe²⁺(aq) → Fe(s) + Mg²⁺(aq)

5 0

3 years ago

How many grams of water (H2O) are there in 2.60 mol of the compound?

ad-work [718]

Answer:

46.839728 grams of water

Explanation:

1 mole is equal to 1 moles H2O, or 18.01528 grams

18.01528 times 2.6 = 46.839728

There are 46.839728 grams h20 in 2.60 mol of the compound

4 0

3 years ago