CHEMISTRY COLLEGE

Challenge question! One of the things hedoesn't mention is in order to use E=hf,
and any derivation of it, the energy must
be in JOULES. We have the energy in eV.
So this will be a two step question. First,
convert the energy to joules (or use the
number from our equation sheet) then
find the wavelength. Once you are done
with that, pick the correct answer below.
8.29x10^-16 m
3.75x10^26 m
2.48x10^-7 m
3.98x10^-26 m

Answers

Answer 1

Answer:

bro this is too hard man can do just quit

Answer 2

Answer:

Answer:

Explanation:

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What may happen to the human body when exposed to an infectious agent? A. When infectious agents get into the human body, your body responds by functioning normally.B. When infectious agents get into the human body, the body gets a surge of energy, causing a slight increase in body temperature, and you feel great.C. When infectious agents get into the human body, your body responds by raising the core body temperature, causing a fever.D.Nothing happens when the human body is exposed to an infectious agent.
When the following redox equation is balanced with smallest whole number coefficients, the coefficient for Sn(OH)3– will be _____. Bi(OH)3(s) + Sn(OH)3–(aq) → Sn(OH)62–(aq) + Bi(s) (basic solution)
Please help me i don’t know the answer to this!!!!!!

A car averages 27.5 miles per gallon

Answers

How much is each gallon or how far are you going is the question you should be asking

Determine the limiting reactant when 30.0 g of propane, C3H8, is burned with 75.0 g of oxygen.

Answers

Answer: The limiting reagent is oxygen gas.

Explanation:

Limiting reagent is defined as the reactant that is present in less amount and it limits the formation of products.

Excess reagent is defined as the reactant which is present in large amount.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For propane:

Given mass of propane = 30.0 g

Molar mass of propane = 44.1 g/mol

Putting values in equation 1, we get:

$\text{Moles of propane}=(30.0g)/(44.1g/mol)=0.680mol$

For oxygen:

Given mass of oxygen = 75.0 g

Molar mass of oxygen = 32 g/mol

Putting values in equation 1, we get:

$\text{Moles of propane}=(75.0g)/(32g/mol)=2.34mol$

The chemical equation for the combustion of propane follows:

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(l)$

By Stoichiometry of the reaction:

5 moles of oxygen gas reacts with 1 mole of propane.

So, 2.34 moles of oxygen gas will react with = $(1)/(5)* 2.34=0.468mol$ of propane

As, given amount of propane is more than the required amount. So, it is considered as an excess reagent.

Thus, oxygen is considered as a limiting reagent because it limits the formation of product.

Hence, the limiting reagent is oxygen gas.

According to the equation below, which of the following will cause the concentration of H2SO4 to increase? 2NaHCO3 (s) + H2SO4 (aq) ⇄ Na2SO4 (aq) + 2H2O (l) + 2CO2 (g) View Available Hint(s) According to the equation below, which of the following will cause the concentration of H2SO4 to increase? 2NaHCO3 (s) + H2SO4 (aq) ⇄ Na2SO4 (aq) + 2H2O (l) + 2CO2 (g) addition of some NaHCO3 (s) addition of some Na2SO4 (aq) removal of some H2O (l) removal of some CO2 (g)

Answers

Answer:

Addition of some Na₂SO₄ (aq).

Explanation:

2NaHCO₃ (s) + H₂SO₄ (aq) ⇄ Na₂SO₄ (aq) + 2H₂O (l) + 2CO₂ (g)

According to the Le Chatelier's principle, the addition of Na₂SO₄ to the reaction would lead to shift to the direction of the reaction that consumes Na₂SO₄, in order to reestablish equilibrium. Since the reaction that consumes Na₂SO₄ is the reaction that produces H₂SO₄, the concentration of H₂SO₄ would increase.

Draw the Lewis structure for BrCl3. What are the approximate bond angles about the central atom?a. 60°.
b. 90°.
c. 109°.
d. 120°.
e. 180°.

Answers

Answer:

Explanation:

BrCl₃ is an interhalogen compound with a hybridization of sp³d. The approximate bond angles can be predicted from the structure (attached below). Although, the lewis structure might be predicted to be trigonal bipyramidal from the structure, it is however a T-shaped geometry because of it's two lone pairs.

Also, from the structure attached, it can be predicted that the approximate bond angles about the central atom is 120° (360 ÷ 3) since each of the three chlorine atoms is equally spaced about the central atom.

The Lewis structure for BrCl₃ is attached to the image below. The bond angles around the central atom, bromine (Br), are 90 degrees between the bromine and each chlorine atom. Therefore, option B is correct.

A Lewis structure, also known as an electron-dot structure or Lewis dot structure is a diagram that represents the valence electrons of an atom or molecule.

Bromine (Br) is in Group 7A and has 7 valence electrons, while each chlorine (Cl) atom in Group 7A also has 7 valence electrons.

Br: 1 atom × 7 valence electrons = 7 valence electrons

Cl: 3 atoms × 7 valence electrons = 21 valence electrons

Total valence electrons = 7 + 21 = 28

To learn more about the bond angle, follow the link:

brainly.com/question/31324226

#SPJ6

I need to find the answer for
_ ML = 8,000,000 L

Answers

Answer:

To find the value of the blank in the equation "_ ML = 8,000,000 L," you can simply fill in the blank with a number:

"_ ML = 8,000,000 L" can be filled in as "8,000 ML = 8,000,000 L."

So, the answer is 8,000 ML.

Culled from AI

Is A and C correct?

I'm a little unsure of this question, but is it right?