3 years ago

How many molecules are there in 3 moles of aluminum chloride ?

Chemistry

1 answer:

Svetradugi [14.3K]3 years ago

6 0

there are 4 atoms in aluminum chloride

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Instruction

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Answer:

A: object 1

B: object 2

C: object 1

D: object 1

Explanation:

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How many grams of sodium bicarbonate are needed to completely react with a 0.892 m phosphoric acid solution that contains to 45.

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Answer:

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4 years ago

A family leaves for summer vacation by driving on the highway. The car's tires start the trip with a pressure of 3.8atm at a tem

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Explanation: Please see the attachments below

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3 years ago

If the specific heat capacity of copper is 387 J/kg/°C, then how much energy is needed to raise the temperature of 400 g of copp

eduard

Answer:

Explanation:

mass = 400 grams * [1 kg/1000 grams] = 0.400 kg

c = 387 Joules / (oC * kg)

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3 years ago

Consider the following hypothetical aqueous reaction. A flask is charged with .065 mol of A in a total volume of 100.0 mL. The f

Inga [223]

Answer: 0.422 M⁻¹s⁻¹

Explanation: Reaction Rate is the speed of decomposition of the reactant(s) per unit of time.

A Rate Law relates concentration of reactants, rate reaction and rate constant:

$r=k[A]^{x}[B]^{y}$

where

[A] and [B] are reactants concentration

x and y are reaction order, not related to the stoichiometric coefficients

k is rate constant

r is rate

Before calculating rate constant, first we have to determine reaction order.

In this question, the reactio order is 2. So, the rate law for it is

$-\frac{d[A]}{dt} =k[A]^{2}$

and the integrated formula is

$\frac{1}{[A]} =\frac{1}{[A]_{0}} +kt$

in which

[A]₀ is initial concentration of reactant

Then, using initial concentration at initial time and final concentration at final time:

$\frac{1}{0.031} =\frac{1}{0.065} +k(40)$

$40k=\frac{1}{0.031}-\frac{1}{0.065}$

$40k=32.26-15.38$

k = 0.422

The rate constant for the reaction is 0.422 M⁻¹.s⁻¹

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3 years ago