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3 years ago

I've been stuck on this problem for 23456789 minutes please help!!

Chemistry

1 answer:

Volgvan3 years ago

6 0

Answer:

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Explanation:

Given:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

Find:

Balance equation

Computation:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Number of atom should be equal in LHS and RHS.

So,

We have to multiply 2 in RHS to get equal number of atom.

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Rank these transition metal ions in order of decreasing number of unpaired electrons.

lesya692 [45]

Answer: The given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

Explanation:

In atomic orbitals, the distribution of electrons of an atom is called electronic configuration.

The electronic configuration in terms of noble gases for the given elements are as follows.

Atomic number of Fe is 26.

$Fe^{3+} - [Ar] 3d^{5}$

So, there is only 1 unpaired electron present in $Fe^{3+}$ .

Atomic number of Mn is 25.

$Mn^{4+} - [Ar]3d^{3}$

So, there are only 3 unpaired electrons present in $Mn^{4+}$ .

Atomic number of V is 23.

$V^{3+} - [Ar] 3d^{2}$

So, there are only 2 unpaired electrons present in $V^{3+}$ .

Atomic number of Ni is 28.

$Ni^{2+} - [Ar] 3d^{8}$

So, there will be 2 unpaired electrons present in $Ni^{2+}$ .

Atomic number of Cu is 29.

$Cu^{+} - [Ar] 3d^{10}$

So, there is no unpaired electron present in $Cu^{+}$ .

Therefore, given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

Thus, we can conclude that given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

7 0

3 years ago

How many grams of calcium are made up by 2.68 x 1023 atoms?

raketka [301]

Answer:

Mass = 17.8 g

Explanation:

Given data:

Number of atoms of Ca = 2.68 × 10²³

Mass in gram = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

2.68 × 10²³ atoms × 1 mole /6.022 × 10²³ atoms

0.445 mol

Mass in gram;

Mass = number of moles × molar mass

Mass = 0.445 mol × 40 g/mol

Mass = 17.8 g

5 0

3 years ago

Two students were in Chemistry Class completing an assigned lab experiment. The two students were to mix 5.34g CaCl2 with CuSO4

skelet666 [1.2K]

Answer:

CaCl₂ + CuSO₄ → CaSO₄ + CuCl₂.

Explanation:

It is a replacement reaction, that cations and anions are replaced with each other.

So, it gives CaSO₄ and CuCl₂.

To balance the reaction, we apply the law of conversation of mass, that the no. of atoms in the reactants side is equal to that in the products side.

So, the balanced reaction is:

CaCl₂ + CuSO₄ → CaSO₄ + CuCl₂.

3 0

3 years ago

The average osmotic pressure of ocean water is 28 atm corresponding to a concentration of 0.50m solutes. what is the approximate

RideAnS [48]

Answer : 0.125 M

Explanation : The definition of osmotic pressure is "the pressure can be applied on a pure solvent to prevent it passing into a given solution by osmosis".

So according to this definition, osmotic pressure can be called as directly proportional to the concentration of the solution and hence the pressure can also be directly proportional to the concentration.

Hence, if pressure is getting decreased from 28 to 7 it means it got decreased by 4 times;
28 / 7 = 4 that means;

So the concentration will be also decreased by 4 times so, 0.50 / 4 = 0.125 M

6 0

3 years ago

A recipe for spaghetti souce requires 2.5 cups of tomato sauce. If only metric measures are available, how many milliliters of t

babunello [35]

Answer:

591.25ml

Explanation:

4 cups=946ml

0.5cups=946÷8=118.25ml

2.5cups=118.25ml*5=591.25ml

8 0

3 years ago