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2 years ago

SOME ONE PLEASE HELP ME I NEED THIS SO BAD 30 POINTS AND WIL MARK BRAINLIST!!!

Chemistry

2 answers:

Ivanshal [37]2 years ago

7 0

Answer:

The Predator is C, top of the pyramid

Secondary Consumers is E, the bottom of the pyramid

Primary Consumers is B, second level from the bottom

Producers is D, bottom of the pyramid

Tertiary Consumers is A, second level from the top

(btw i tried my best lol, i dont know much about this)

Explanation:

Phantasy [73]2 years ago

4 0

Answer:

Ape x Predator - C)

Tetiary Consumers - A)

Secondary Consumers - E)

Primary Consumers - B)

Producers - D)

Explanation:

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garik1379 [7]

3I₂ + 2Al → 2AlI₃

m(I₂)=3M(I₂)m(Al)/{2M(Al)}

m(I₂)=3*253.8*20.4/{2*27.0}=287.64 g

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3 years ago

Making solutions is an extremely important component to real-life chemistry. If you make 3.00 L of a solution using 90.0 g of so

kumpel [21]

Answer:

Final concentration of NaOH = 0.75 M

Explanation:

For $NaOH$ :-

Given mass = 90.0 g

Molar mass of NaOH = 39.997 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{90.0\ g}{39.997\ g/mol}$

$Moles\ of\ NaOH= 2.2502\ mol$

Molarity is defined as the number of moles present in one liter of the solution. It is basically the ratio of the moles of the solute to the liters of the solution.

The expression for the molarity, according to its definition is shown below as:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Where, Volume must be in Liter.

It is denoted by M.

Given, Volume = 3.00 L

So,

$Molarity=\frac{2.2502\ mol}{3.00\ L}=0.75\ M$

Final concentration of NaOH = 0.75 M

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3 years ago

A certain weak acid, ha, has a ka value of 6.0×10−7. calculate the percent ionization of ha in a 0.10 m solution.

joja [24]

For the purpose, we will use the equation for determining the dissociation constant from concentration and percent of ionization:

Kd = c × α²

α = √(Kd/c) × 100%

Kd = 6.0×10⁻⁷

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α = √(6.0×10⁻⁷/0.1) × 100% = 0.23%

So, in the solution, the acid percent of ionization will be just 0.23%.

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3 years ago

What is the mass of bromine gas if it has a pressure of 720 mmHg, volume of 25mL and a temperature of 18.3 degrees Celsius

Annette [7]

Answer:

Mass = 0.158 g

Explanation:

Formula used,

P V = n R T

Or,

n = P V / R T

Putting values,

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n = 0.00099 mol

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Also,

Mass = n . Molecular Mass

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