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Elena L [17]
3 years ago
5

What is the easiest way to determine the reactivity of an element

Chemistry
1 answer:
makkiz [27]3 years ago
4 0

I know the answer to your question but if you want me to answer this question first, I need your help with my question "How do I solve number 12? Quick please I need help ASAP!!!"

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A compound is found to contain 26.73 % phosphorus, 12.09 % nitrogen, and 61.18 % chlorine by mass. What is the empirical formula
Mrrafil [7]

Answer:

PNCl_2

Explanation:

Hello!

In this case, when determining empirical formulas by knowing the by-mass percent, we first must assume the percentages as masses so we can compute the moles of each element:

n_P=\frac{26.73g}{30.97g/mol}=0.863mol\\\\n_N=\frac{12.09g}{14.01g/mol}=0.863mol\\\\n_C_l=\frac{61.18g}{35.45g/mol}=1.726mol

Now, for the determination of the subscript of each element in the empirical formula, we divide the moles by the fewest moles (P or N):

P=\frac{0.863mol}{0.863mol}=1\\\\N= \frac{0.863mol}{0.863mol}=1\\\\Cl=\frac{1.726mol}{0.863mol}2

Thus, the empirical formula is:

PNCl_2

Regards!

4 0
2 years ago
Disccuss what happens to copper in photochromic lenses from a redox perspective.
larisa86 [58]
The simplest ion that copper forms in solution is the typical blue hexaaquacopper(II) ion - [Cu(H2O)6]<span>2+</span>
8 0
3 years ago
How many formula units make up 25.8g of magnesium chloride (MgCl2)? Express the number of formula units numerically.
Verdich [7]

Answer:

Explanation:

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8 0
3 years ago
Which statement best describes John Dalton’s use of creativity in his work?
asambeis [7]
<span>The scientist thought that the atom was the smallest particle in the universe is John Dalton. He established the atomic theory which consists of five; elements are made of extremely small particles called atoms, atoms of different element have different sizes, mass and physic – chemical properties, atoms cannot be divided further, destroyed or created, atoms can combine to form compounds and in chemical reaction, atoms can be combined, separated or rearranged</span>
6 0
3 years ago
an atom contains 32 protons and has a mass number of approximately 72 amu what is the chemical symbol for the atom
olga nikolaevna [1]

I belive it would be Hf (hafanium).

5 0
3 years ago
Read 2 more answers
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