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4 years ago

The relative atomic mass of an element is the mass of its atoms compared with that of which element?

1 answer:

5 0

In calculating the relative atomic mass of an element with isotopes<span>, the relative mass and proportion of each is taken into account. For example, naturally occurring chlorine consists of atoms of relative isotopic masses 35 (75%) and 37 (25%). Its relative atomic mass is 35.5.</span>

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A compound consists of 75% magnesium and 25% oxygen. Find the empirical formula.

laila [671]

<h2>Answer:</h2>

% Composition of elements:

Magnesium = 75%
Oxygen = 25%

Atomic mass of given elements:

Magnesium = 24 g
Oxygen = 16 g

Now, divide % composition by Atomic mass:

$\footnotesize\implies Mg = \dfrac{\% \: Composition}{Atomic \: mass} = \dfrac{75}{24} = \bf 3.125$

$\footnotesize\implies O = \dfrac{\% \: Composition}{Atomic \: mass} = \dfrac{25}{16} = \bf 1.5625$

Simplest Ratio:

$\footnotesize\implies Mg = \dfrac{3.125}{1.5625} = 2$

$\footnotesize\implies O = \dfrac{1.5625}{1.5625} = 1$

Empirical Formula:

$\footnotesize\implies \underline{ \boxed{ \red{ \bf Empirical \: Formula = Mg_2O}}}$

8 0

3 years ago

How are mutations different? Provide examples.

Murljashka [212]

Answer:

sdoawjdiowadawoi siokdwajsiokwjDIWIAdawidjaskmdnkawdjad kadakwdkawdawhdaw

Explanation: im smart

4 0

3 years ago

Read 2 more answers

Calculate the root mean square (rms) average speed of the atoms in a sample of xenon gas at 0.15 atm and -55c

GrogVix [38]

Answer:
Vrms is 149.7266 m/sec

Explanation:
The root means square velocity of a gas can be calculated as follows:
Vrms = $\sqrt{ \frac{3RT}{M}}$
where:
R is the ideal gas constant = 8.3145
T is absolute temperature = -55 + 273 = 118 degrees kelvin
M is the molar mass of the gas = 131.293 grams = 0.131293 kg

Substituting with these givens in the above equation, we would find that the Vrms is 149.7266 m/sec

Hope this helps :)

7 0

4 years ago

Caffeine belongs to a large class of nitrogen-containing natural products called ____________.

Sati [7]

Answer:

I Dont know sorry.........

8 0

3 years ago

What is the ratio of carbon, hydrogen, and oxygen in most carbohydrates?

horrorfan [7]

In carbohydrates the C:H:O is 1:2:1

7 0

3 years ago

Read 2 more answers