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telo118 [61]
3 years ago
12

Please help me on question #2 please please really need help due today at 9:00pm please

Chemistry
1 answer:
sashaice [31]3 years ago
8 0
No, the biggest star in the universe is UY scuti
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Determine whether the following reaction is a Lewis acid/base reaction and if so, what is the Lewis acid: Fe3+(aq) + 6 CN−(aq) →
Aleonysh [2.5K]

Answer: It is a Lewis acid/base reaction, and Fe^{3+} is the Lewis acid.

Explanation:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

Fe^{3+} can readily accept electrons and thus act as a lewis acid which is short of electrons.

CN^- can readily lose electrons and thus act as a lewis base which has excess of electrons.

It is a Lewis acid/base reaction, and Fe^{3+} is the Lewis acid.

4 0
4 years ago
Find the molality of this aqueous solution 15.0% by mass kBr (119g/mol).
Vsevolod [243]

Answer:

we will take a 100g sample of this solution for our convenience

so , there is 15 g kBr in this 100g solution

we know that molality is the number if moles of solute / mass of solvent in kg

we need to find the number of moles in 15g kBr

no of moles = 15/119 s

moles  = 0.126 moles/ 100g

multiplying both the numerator and the denominator by 10 to get 1 kg in denominator

=  1.26 moles / 1 kg

Hence, the molality is 1.26

would appreciate a brainliest

3 0
4 years ago
How do you prove a scalene triangle is a right triangle?
Mrrafil [7]

if all sides are unequal it is scalene and if one angle adds up to 90 while the rest are different youve proven it.

3 0
3 years ago
Bromine has a density of 3.10g/cm3. If you have 50.0 ML of bromine, how many grams do you have?
Zanzabum

Answer:

The answer is

<h2>155 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of bromine = 50 mL

density = 3.10 g/cm³

It's mass is

mass = 50 × 3.10

We have the final answer as

<h3>155 g</h3>

Hope this<u> </u>helps you

5 0
3 years ago
Read 2 more answers
If 30.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 40.0 mL of 0.175 M HCl, what is the concentration of the C
Over [174]

Answer:

Concentration of Ca(OH)₂:

0.117 M.

Explanation:

How many moles of HCl is consumed?

Note the unit of concentration: moles per liter solution.

c(\text{HCl}) = 0.175\;\text{M} = 0.175\;\text{mol}\cdot\textbf{L}^{-1}.

Convert milliliters to liters.

V(\text{HCl})=40.0\;\text{mL} = 0.0400\;\text{L}.

n(\text{HCl}) = c(\text{HCl})\cdot V(\text{HCl})= 0.175\;\text{mol}\cdot\text{L}^{-1} \times 0.0400\;\text{L}= 7.00\times 10^{-3}\;\text{mol}.

How many moles of NaOH in the solution?

Refer to the equation. The coefficient in front of Ca(OH)₂ is 1. The coefficient in front of HCl is 2. In other words, it takes two moles of HCl to neutralize one mole of Ca(OH)₂. That 7.00\times 10^{-3}\;\text{mol} of HCl will neutralize only half that much Ca(OH)₂.

\displaystyle n(\text{Ca}(\text{OH})_2)=\frac{1}{2}\;n(\text{HCl}) = 3.50\times 10^{-3}\;\text{mol}.

What's the concentration of the Ca(OH)₂ solution?

Concentration is the number of moles of solute per unit volume.

\displaystyle c(\text{Ca}(\text{OH})_2) = \frac{n(\text{Ca}(\text{OH})_2)}{V(\text{Ca}(\text{OH})_2)} = \frac{3.50\times 10^{-3}\;\text{mol}}{0.0300\;\text{L}}=0.117\;\text{mol}\cdot\text{L}^{-1}.

3 0
3 years ago
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