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2 years ago

13

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules a

re magnetic.

1 answer:

nikitadnepr [17]2 years ago

6 0

B2 and O2 are paramagnetic material and paramagnetic material is magnetic

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A 23.0g sample of a compound contains 12.0g of C, 3.0g of H, and 8.0g of O.What the empirical formula of the compound

Kryger [21]

Answer:

The empirical formula of compound is C₂H₆O.

Explanation:

Given data:

Mass of carbon = 12 g

Mass of hydrogen = 3 g

Mass of oxygen = 8 g

Empirical formula of compound = ?

Solution:

First of all we will calculate the gram atom of each elements.

no of gram atom of carbon = 12 g / 12 g/mol = 1 g atoms

no of gram atom of hydrogen = 3 g / 1 g/mol = 3 g atoms

no of gram atom of oxygen = 8 g / 16 g/mol = 0.5 g atoms

Now we will calculate the atomic ratio by dividing the gram atoms with the 0.5 because it is the smallest number among these three.

C:H:O = 1/0.5 : 3/0.5 : 0.5/0.5

C:H:O = 2 : 6 : 1

The empirical formula of compound will be C₂H₆O

5 0

2 years ago

What is the maximum volume of a 0.788 M CaCl2 solution that can be prepared using 85.3 g CaCl2

LekaFEV [45]

Molar mass CaCl₂ = 111.0 g/mol

number of moles:

n = mass of solute / molar mass

n = 85.3 / 111.0

n = 0.7684 moles of CaCl₂

M = n / V

0.788 M = <span>0.7684 / V
</span>
V = 0.7684 / 0.788

V = 0.97512 L

hope this helps!

3 0

2 years ago

Which of the following combinations of particles represents an ion of net charge -1 and of mass number 82? Group of answer choic

noname [10]

Answer:

The correct choice is E (47 neutrons, 35 protons, 36 electrons)

Explanation:

A ion of net charge -1 means that the ion wins an e-.

We dismiss options B and C.

We also dismiss option A because neutrons + protons = 81.

neutrons + protons = mass number

So we have E and C.

We see that C has 47 neutrons, 36 protons and 36 electrons and, as the atomic number matches the number of protons, we find out on the Periodic Table that the atomic number 36 represents to Krypton, a noble gas. It is impossible! A noble gas never can't be a ion of net charge.

Option E is correct, It is an isotope of Br.

Br has 35 protons (its atomic number)

47 neutrons, that's why it is an Isotope (Br has always 45 neutrons)

As usual, Br has 35 electrons, if it represents a ion of net charge -1, it menas it won 1 e-.

5 0

2 years ago

When 50 ml (50 g) of 1.00 m hcl at 22oc is added to 50 ml (50 g) of 1.00 m naoh at 22oc in a coffee cup calorimeter, the tempera

vitfil [10]

Answer:

$\boxed{\text{2700 J}}$

Explanation:

HCl + NaOH ⟶ NaCl + H₂O

There are two energy flows in this reaction.

Heat of reaction + heat to warm water = 0

q₁ + q₂ = 0

q₁ + mCΔT = 0

Data:

m(HCl) = 50 g

m(NaOH) = 50 g

T₁ = 22 °C

T₂ = 28.87 °C

C = 4.18 J·°C⁻¹g⁻¹

Calculations:

m = 50 + 50 = 100 g

ΔT = 28.87 – 22 = 6.9 °C

q₂ = 100 × 4.18 × 6.9 = 2900 J

q₁ + 2900 = 0

q₁ = -2900 J

The negative sign tells us that the reaction produced heat.

The reaction produced $\boxed{\textbf{2900 J}}$ .

7 0

2 years ago

IF YOU GIVE A LINK OR DON"T ACTUALLY ANSWER THIS QUESTION RIGHT JUST FOR POINTS I WILL REPORT YOUR ANSWER AND YOU

AVprozaik [17]

Answer:

No, the puddle was formed because of the sun, because if there was snow and it rained then it would have turned slippery or icy

8 0

2 years ago

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