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tankabanditka [31]
1 year ago
14

Using your periodic table, identify element X based on its average atomic mass.

Chemistry
1 answer:
77julia77 [94]1 year ago
7 0

The relative atomic mass of the element is 15.99 and the element is oxygen.

<h3>What is the relative atomic mass of the element?</h3>

Let us note that owing to the fact that elements often have isotopes, the relative atomic mass is not always a whole number. Now we have tp obtain the relative atomic mas from the atomic masses of the elements.

Thus;

X = (15.99 * 0.99762) + (16.999 * 0.00038) + (17.999 * 0.002)

X = 15.95 + 0.0065 + 0.036

X= 15.99

Thus the relative atomic mass of the element is 15.99 and the element is oxygen.

Learn more about relative atomic mass:brainly.com/question/25698972

:

#SPJ1

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The small 2 next to Nitrogen is called the ____.
klasskru [66]
1. Subscript is below
2. Coefficient large 2 indicates the number of moles
3. Atoms
1/2 O2 + H2 —> H2O
It’s the atoms that balance on each side
Notes that 1/2 is the coefficient and 2 is the subscript in H2 and H2O
3 0
3 years ago
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a culinary student fills a 40ml container with 37.2 grams of vegetable oil.What is the density of the oil
Lynna [10]

Answer:

<h2>0.93 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 37.2 g

volume = 40 mL

We have

density =  \frac{37.2}{40}  \\  = 0.93

We have the final answer as

<h3>0.93 g/mL</h3>

Hope this helps you

4 0
2 years ago
Which of the following could be considered a scientific statement? (2 points) ​
Andrej [43]

Answer:

The answer of the scientific STATEMENT is" Appears That Ants Live In Colonies."

7 0
2 years ago
Which two terms represent types of chemical
maw [93]

3) molecular and structural

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Molecular and structural are two terms that represents chemical formula of compounds and molecules.

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4 0
3 years ago
PLEASEEEE HELP :')
mel-nik [20]

Answer:

340 grams Ca₃P₂ (2 sig. figs.)

Explanation:

   3Ca     +     2P     =>    Ca₃P₂

5.6 mole + excess =>   ? grams

Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.

=>  Ca   +   2/3P   =>    1/3Ca₃P₂

From the above, 1 mole of Ca => 1/3 mole Ca₃P₂  

∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂

=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂

=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂

≅ 340 grams Ca₃P₂ (2 sig. figs.)

7 0
3 years ago
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