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Lelu [443]
2 years ago
14

How many hydrogen atoms are in water, H2O? A) 1 B) 2 C) 3 D) 0

Chemistry
2 answers:
pishuonlain [190]2 years ago
8 0
There are two hydrogen atoms in one molecule of water.

The answer is B) 2
Sever21 [200]2 years ago
8 0
2 hydrogens in water
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egoroff_w [7]

Answer:

2

Explanation:

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2 years ago
How much aluminum oxide are produced when 46.5g of Al react with 165.37g of MnO?
solong [7]

Aluminum oxide produced : = 79.152 g

<h3>Further explanation</h3>

Given

46.5g of Al

165.37g of MnO

Required

Aluminum oxide produced

Solution

Reaction

2 Al (s) + 3 MnO (s) → 3 Mn (s) + Al₂O₃ (s)

  • mol Al(Ar = 27 g/mol) :

mol = mass : Ar

mol = 46.5 : 27

mol = 1.722

  • mol MnO(Ar=71 g/mol) :

mol = 165.37 : 71

mol = 2.329

mol : coefficient ratio Al : MnO = 1.722/2 : 2.329/3 = 0.861 : 0.776

MnO as a limiting reactant(smaller ratio)

So mol Al₂O₃ based on MnO as a limiting reactant

From equation , mol Al₂O₃ :

= 1/3 x mol MnO

= 1/3 x 2.329

= 0.776

Mass Al₂O₃ (MW=102 g/mol) :

= 0.776 x 102

= 79.152 g

7 0
3 years ago
Which two objects would experience the greatest gravitational force between
Naily [24]

Answer:

D

Explanation:

The greater the distance apart, the lesser the gravitational force between the objects

3 0
2 years ago
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Check the boxes next to events or trends that first occurred in science from about 1700. Darwin published his theory of natural
marishachu [46]

Check the boxes next to events or trends that first occurred in science from about 1700.

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-Darwin published his work in 1859.

X Archimedes described the principle of the lever.

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/ Scientific societies and academies were formed.

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X The double-helix structure of DNA was determined.

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X Copernicus proposed a Sun-centered universe.

<span>-It was proposed in the 16th century.</span>

X Continental drift was explained by the theory of plate tectonics.

<span> -It was proposed at around 1910 till 1950 but was accepted at 1960. </span>

X The Earth was proven to be spherical.

-It was argued at around 384-322 BC.

4 0
2 years ago
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It is slightly ______which can ________the acid in the mouth​
Oduvanchick [21]

Answer:

Explanation:

.lgjtr;jgpe

4 0
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