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4 years ago

Can a electron be found in an exact spot within a atom

Chemistry

1 answer:

goldenfox [79]4 years ago

5 0

Answer:

Electrons are located in an electron cloud, which is the area surrounding the nucleus of the atom. There is usually a higher probability of finding an electron closer to to the nucleus of an atom.

Explanation:

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In general is it better to measure a large or small sample

Sveta_85 [38]

Large samples... also can be small as well but usually bigger is better

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3 years ago

A chef is testing out a new set of iron cookware. He knows that iron has a specific heat of 445 J/kg°C. He heats a 2 kg iron ski

Musya8 [376]

Answer:

yo whats good nebyu its nathan Imao

Explanation:

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3 years ago

Calculate the pH of: (a) 0.1M HCl; (b) 0.1M NaOH; (c) 3 X 10% M HNO3; (d) 5 X 10-10 M HCIO.; and (e) 2 x 10-8 M KOH.

Shtirlitz [24]

Answer:

(a) $pH = -Log (0.1M) = 1$

(b) $pH = -Log (10^{-13}M) = 13$

(d) $pH = -Log (4.93x10^{-10}M) = 9.3$

(e) $pH = -Log (5^{-7}M) = 6.3$

Explanation:

To calculate de pH of an acid solution the formula is:

$pH = -Log ([H^{+}]) = 1$

were [H^{+}] is the concentration of protons of the solution. Therefore it is necessary to know the concentration of the protons for every solution in order to solve the problem.

(a) and (c) are strong acids so they dissociate completely in aqueous solution. Thus, the concentration of the acid is the same as the protons.

(b) and (e) are strong bases so they dissociate completely in aqueous solution too. Thus, the concentration of the base is the same as the oxydriles. But in this case it is necessary to consider the water autoionization to calculate the protons concentration:

$K_{w} =[H^{+} ][OH^{-}]=10^{-14}$

clearing the $[H^{+} ]$

$[H^{+} ]=\frac{10^{-14}}{[OH^{-}]}$

(d) is a weak base so it is necessary to solve the equilibrium first, knowing $Ka=3.24x10^{-8}$

The reaction is $HClO$ → $H^{+} + CO^{-}$ so the equilibrium is

$Ka=3.24x10^{-8}=\frac{x^{2}}{5x10^{-8}-x}$

clearing the <em>x</em>

${x^{2}={1.62x10^{-17}-3.24x10^{-8}x}$

$x=[H^{+}]=4.93x10^{-10}$

6 0

4 years ago

A year ago If an element has 12 protons and 17 neutrons, how many electrons must it have?

Dafna1 [17]

<span>if given element is neutral, than it has to have same number of protons and electrons. so in this case it is 12 electrons.</span><span>

Hope it helps :)

</span>

4 0

3 years ago

Read 2 more answers

A sample of gas has an initial volume of 20 L and an initial pressure of

Kitty [74]

The new volume of the gas is 16.3 L.

<h3>Boyle's law</h3>

Boyle's law states that the volume of a fixed mass of gas is inversely proportional to its pressure, at a constant temperature.

To calculate the new volume of the gas, we use the expression from Boyle's law.

Formula:

PV = P'V'............. Equation 1

Where:

P = initial pressure of gas
V = Initial volume of gas
P' = Final pressure of gas
V' = Final volume of gas

Make V' the subject of the equation

V' = PV/P'............. Equation 2

From the question,

V = 20 L
P = 2.5 atm
P' = 3.1 atm

Substitute these values into equation 2

V' = (20×2.5)/3.1
V' = 16.13 L.

Hence, The new volume of the gas is 16.3 L.

Learn more about Boyle's law here: brainly.com/question/26040104

3 0

3 years ago