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snow_lady [41]
3 years ago
11

What element is this?

Chemistry
1 answer:
LiRa [457]3 years ago
8 0

i think helium hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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Caffeine, a stimulant found in coffee and soda, has the following elemental composition: 49.48% carbon, 5.19% hydrogen, 16.48% o
prisoha [69]

Answer:

Explanation:

C = 49.48

H = 5.19

O = 16.48

N = 28.85

ratio of moles

= 49.48 / 12 : 5.19 / 1 : 16.48 / 16 : 28.85 / 14

= 4.123 : 5.19 : 1.03 : 2.06

= 4 : 5 : 1 : 2

so the empirical formula = C₄ H₅O N₂

Let molecular formula = (  C₄ H₅ON₂ )ₙ ,

n ( 48 + 5 + 16 + 28 ) = 119.19

97 n = 194.19

n = 2 ( approx )

molecular formula = C₈ H₁₀O₂ N₄

3 0
3 years ago
Which of the following is the smaller atom: magnesium or chlorine?
Aleks04 [339]

Answer:

Chlorine atoms are smaller

Explanation:

Magnesium have more electrons than chlorine.

3 0
3 years ago
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Write an equation to show how perchloric acid, HClO4, reacts with water. Include states of matter in your answer. Click in the a
BARSIC [14]

Answer:

HClO4(aq) + H2O(l) ⇄ H3O+(aq) + ClO4-(aq)

Explanation:

When an acid dissolves in water, it will produce hydronium ion, H3O+ as the only positive ion.

perchloric acid, HClO4, being an acid will react with water, H2O to produce hydronium ion, H3O+ as shown below:

HClO4(aq) + H2O(l) ⇄ H3O+(aq) + ClO4-(aq)

8 0
3 years ago
Which characteristics do Jupiter and Saturn share? Check all that apply
Natasha2012 [34]

Answer:

The correct answers are first, fourth, fifth

Explanation:

6 0
3 years ago
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in a plant 1.500kg of nitrogen oxide is consumed per day to produce 1.500 kg of nitrogen dioxide per day what is the percent yie
mafiozo [28]

Answer: The answer is 100%. Hope this helps :)

Explanation:

8 0
4 years ago
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