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2 years ago

PLZ HELP ME WITH MY WORK

Chemistry

1 answer:

vivado [14]2 years ago

8 0

Answer:

It should be the answer D. A type of atom

Explanation:

A model is a "synthetic coordination entity that closely approaches the properties of a metal ion in a protein"

An ion is a charged atom.

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Which element is very toxic and reactive green gas?

yawa3891 [41]

I would answer this but i have to go to bed i have a reading test tommorow

3 0

2 years ago

Read 2 more answers

Potassium chlorate is a white, crystalline solid. It can be broken down into potassium chloride (a salt)

lions [1.4K]

Answer:

Notice that the number of atoms of

and

are the same on both sides, but the numbers of

atoms are not. There are 3

atoms on the the left side and 2 on the right. 3 and 2 are factors of 6, so add coefficients so that there are 6

atoms on both sides.

2KClO

(

)

+ heat

→

KCl(s)

(

)

Now the

and

atoms are not balanced. There are 2 of each on the left and 1 of each on the right. Add a coefficient of 2 in front of

KCl

2KClO

(

)

+ heat

→

2KCl(s)

(

)

The equation is now balanced with 2

atoms,

7 0

2 years ago

Read 2 more answers

HC2H3O2 (aq) + H2O (l) ⇔ C2H3O2- (aq) + H3O+ (aq) Ka = 1.8 x 10-5

marin [14]

The concentration of [H3O⁺]=2.86 x 10⁻⁶ M

<h3>Further explanation</h3>

In general, the weak acid ionization reaction

HA (aq) ---> H⁺ (aq) + A⁻ (aq)

Ka's value

$\large {\boxed {\bold {Ka \: = \: \frac {[H ^ +] [A ^ -]} {[HA]}}}}$

Reaction

HC₂H₃O₂ (aq) + H₂O (l) ⇔ (aq) + H₃O⁺ (aq) Ka = 1.8 x 10⁻⁵

$\tt Ka=\dfrac{[C_2H_3O^{2-}[H_3O^+]]}{[HC_2H_3O_2]}}\\\\1.8\times 10^{-5}=\dfrac{0.22\times [H_3O^+]}{0.035}$

[H₃O⁺]=2.86 x 10⁻⁶ M

5 0

3 years ago

Brut [27]

Answer:

Ca(OH)₂ + H₂SO₄ → CaSO₄ + H₂O

Explanation:

Chemical equation:

Ca(OH)₂ + H₂SO₄ → CaSO₄ + H₂O

Balanced chemical equation:

Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O

The given reaction is double displacement reaction in which anion and cation of both reactant exchanged with each other. Calcium hydroxide react with sulfuric acid and form calcium sulfate and water.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AD +CB

6 0

2 years ago

A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t

777dan777 [17]

The molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = $\frac{A}{cl}$