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3 years ago

PLEASE HELP ASAP!!!

Chemistry

2 answers:

sladkih [1.3K]3 years ago

8 0

A binary phase or binary compound is a chemical compound containing two different elements

vampirchik [111]3 years ago

3 0

Answer:

the correct answer is

a compound composed of two different elements

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The concentrations of Fe and K in a sample of riverwater are 0.0400 mg/kg and 1.30 mg/kg, respectively. Express the concentratio

Ierofanga [76]

Answer :

The concentration in molality of Fe is, $7.1\times 10^{-7}mol/kg$

The concentration in molality of K is, $3.3\times 10^{-5}mol/kg$

Explanation:

First we have to calculate concentration in molality of Fe.

Molar mass of Fe = 56 g/mol

Concentration of Fe = 0.0400 mg/kg = $4\times 10^{-5}g/kg$

Conversion used : 1 g = 1000 mg

$\text{Concentration in molality}=7.1\times 10^{-7}mol/kg$

Thus, the concentration in molality of Fe is, $7.1\times 10^{-7}mol/kg$

Now we have to calculate concentration in molality of K.

$\text{Concentration in molality}=\frac{\text{Concentration of K}}{\text{Molar mass of K}}$

Molar mass of K = 39 g/mol

Concentration of K = 1.30 mg/kg = $1.3\times 10^{-3}g/kg$

Conversion used : 1 g = 1000 mg

$\text{Concentration in molality}=\frac{1.3\times 10^{-3}g/kg}{39g/mol}$

$\text{Concentration in molality}=7.1\times 10^{-7}mol/kg$

Thus, the concentration in molality of K is, $3.3\times 10^{-5}mol/kg$

5 0

3 years ago

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed. Giv

Sedaia [141]

<h3><u>Answer;</u></h3>

No reaction occurs

<h3><u>Explanation;</u></h3>

An ionic equation is a chemical equation where the electrolytes in aqueous solution are written as dissociated ions.
These type of reactions are written only for reactions that occur in solution and are an attempt to show how the ions present are reacting.
In this case; when Al(C2H3O2)3 and LiNO3 are mixed, there will be no reaction that occurs, thus we can not write an ionic reaction since there is no chemical reaction took place between the two compounds.

5 0

3 years ago

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The partial pressures of the gases in a mixture are 0.875 atm O2, 0.0553 atm N2, and 0.00652 atm Ar. What is the total pressure

Tresset [83]

B. 0.937 atm
The total pressure of a gas mixture is simply the sum of the partial pressures of each gas within the mixture. So let's add them together: 0.875 atm + 0.0553 atm + 0.00652 atm = 0.93682 atm.
Since we only have 3 significant figures in our data, round the result to 3 figures, giving 0.937 atm, which exactly matches option "B" which is the correct answer.

6 0

3 years ago

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How are superheavy elements made?

Julli [10]

Answer: Most methods for making new elements involve a cyclotron, which speeds up atoms to high velocities before they smash into other atoms—these atoms are usually of different elements. This causes the nuclei to combine, creating new heavier elements.

Explanation: How are superheavy elements made?

3 0

3 years ago

Question 11 (5 points)

LenKa [72]

Answer:

False

Explanation:

On the left side of the equation (Li + O2), there is 1 Li atom and 2 O atoms.

but on thw right side of the equation (Li2O,) there is 2 Li atoms and 1 O atom

8 0

3 years ago