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3 years ago

Classify each of the molecules given below by molecular shape.

1 answer:

4 0

Missing question find on internet.
Answers are:
1) O₂ - linear.
2) CH₄ - tetrahedral.
3) SO₃ - trigonal planar.
4) SF₄ - trigonal bipyramidal.
5) BeF₂ - linear.
6) SiCl₄ - tetrahedral.
7) ClF₃ - T-shaped.
8) CO₂ - linear.
9) NH₃ - trigonal pyramidal.
10) SO₂ - bent.
11) H₃O⁺ - trigonal pyramidal.
12) XeF₄ - square planar.
13) H₂O - bent.

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Question 14(multiple choice worth 2 points) a student had a sample of pure water, and added an unknown substance to it. the stud

pantera1 [17]

The answer is A its basic

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3 years ago

For the following reaction, 4.34 grams of sulfur dioxide are mixed with excess oxygen gas . The reaction yields 3.89 grams of su

Degger [83]

Answer:

5.42g, 71.77%

Explanation:

First, we have to write out the balanced chemical equation. The unbalanced equation can be written as “SO2+O2 -> SO3” and to balance it, we can see that having two mols of SO2 and two mols of SO3 will make each side have the same amount of mols per element on each side. So the balanced chemical equation is “2SO2 + O2 -> 2SO3”

Now, we want to solve for the theoretical yield in grams of SO3. To do this, we have to use dimensional analysis. We convert g SO2 into mols SO2 using the molar mass of the elements. Then we convert mols of SO2 into mols of SO3 using the balanced equation. Once we’ve done that, we can convert mols of SO3 into grams of SO3.

You should know how to look up the molar mass of elements on the periodic table by now. Find the masses and set up the terms so they cancel like so:

$4.34g \times \frac{1mol \: so2}{64.07g \: so2} \times \frac{2 \: mol \: so3}{2 \: mol \: so2} \times \frac{80.07gso3}{1 \: mol \: so3}$

Doing the math, we get 5.42g so3 as the theoretical yield. This is the most amount that you could ever get if the world was a perfect place. But alas, it isn’t and mistakes are gonna happen, so the number is going to be less than that. So the best we can do, is to figure out the percent yield that we got.

In a lab scenario, this was calculated to be 3.89 g as stated by the problem. The percent composition formula is

$| \frac{result}{expected \: result} | \times 100$

and plugging the numbers into it, we get:

$| \frac{3.89}{5.42} | \times 100 = 71.77\%$

make sure to follow the decimal/significant figure rules of your instructor, but only round at the end. My professor didn't care too much thankfully, but some professors do

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2 years ago

HNO3 Express your answers as ions separated by a comma.

erastovalidia [21]

In this item, it is assumed that we are to express the given compound in their ionic form. To be able to determine as to what ions this compound will dissociate into, we have the chemical reaction.

HNO3 --> H⁺ + NO₃⁻

Hence, the ions are H⁺, NO₃⁻.

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3 years ago

Who's your celebrity crush and why?

dezoksy [38]

Answer:

Ian Somerhalder because he's JUST SO fine

Explanation:

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3 years ago

Read 2 more answers

What is the correct formula for combining Mg2+ and Br1+

True [87]

Answer: The correct formula is $MgBr_2$

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here magnesium is having an oxidation state of +2 called as $Mg^{2+}$ cation and bromine $Br^{-}$ is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MgBr_2$ .

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

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2 years ago