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DanielleElmas [232]
3 years ago
6

The diagram below shows a longitudinal wave at one instant in its motion. Each oval represents a particle acted on by the energy

of the wave as it moves from left to right.
Which line on the diagram indicates a region of rarefaction?
Chemistry
2 answers:
elena-s [515]3 years ago
6 0
There is no diagram for me to answer your question
marusya05 [52]3 years ago
5 0

Answer: It is the middle one on the bottom

Explanation:

trust me i just did this question

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Most solids
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Most solids a) are dense and difficult to compress.

Most solids are closely compacted, their molecules are close together and vibrate. They don't move freely like gas or water molecules do.
They are difficult to be squeezed or flattened.
6 0
3 years ago
Groups of elements that are shiny but not lustrous, have a semi-conductive property, and are brittle are classified as?
9966 [12]
Answer:
A. Nonmetals
3 0
3 years ago
A compound contains 1.10 mol of K, 0.55 mol of Te, and 1.65 mol of O. What is the simplest formula of this compound?
sergiy2304 [10]

Answer:

K_2TeO_3

Explanation:

Given that:-

Moles of K = 1.10 moles

Moles of Te = 0.55 moles

Moles of O = 1.65 moles

Taking the simplest ratio of the moles of the elements as:-

   K : Te : O

1.10 : 0.55 : 1.65  

   2 :     1   : 3

Empirical formulas is the simplest or reduced ratio of the elements in the compound. So, the empirical formula is:- K_2TeO_3

6 0
3 years ago
Methane and oxygen react to form carbon dioxide and water. what mass of water is formed if 0.80 g of methane reacts with 3.2 g o
Charra [1.4K]

1.8 g

<h3>Further explanation</h3>

<u>Given:</u>

0.80 g of methane reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide.

<u>Question:</u>

What mass of water is formed?

<u>The Process:</u>

Methane and oxygen react to form carbon dioxide and water. Remember this, the chemical activity that uses oxygen to produce light and heat is also called the combustion process.

In any chemical reaction, the sum of the masses of the reactants is equal to the sum of the masses of the products. That's right, this is called conservation of the masses.

Let us write the word equation of the chemical reaction and then solve the problem following the law of the conservation of mass.

\boxed{ \ Methane + Oxygen \rightarrow Carbon \ dioxide + Water\ }

\boxed{ \ 0.80 \ g \ + \ 3.2 \ g \rightarrow 2.2 \ g \ + \ m_{Water}? \ }

\boxed{ \ m_{reactants} = m_{products} \ }

\boxed{ \ 0.80 \ g \ + \ 3.2 \ g = 2.2 \ g \ + \ m_{Water} \ }

Rewrite by rearranging as follows:

\boxed{ \ 2.2 \ g \ + \ m_{Water} = 0.80 \ g \ + \ 3.2 \ g \ }

\boxed{ \ 2.2 \ g \ + \ m_{Water} = 4.0 \ g \ }

\boxed{ \ m_{Water} = 4.0 \ g - 2.2 \ g \ }

Thus the mass of water formed is 1.8 g.

The balanced equation with state symbols is:

\boxed{ \ CH_4_{(g)} + 2O_2_{(g)} \rightarrow CO_2_{(g)} + 2H_2O_{(l)} \ }

<u>Notes:</u>

  • The French scientist Antoine Laurent Lavoisier represented his essential contribution by declaring the law of conservation of mass as one of the fundamental laws in chemistry.
  • The law of the conservation of the mass states that in a chemical reaction the sum of the masses of the reactants is equal to the sum of the masses of the products. \boxed{\boxed{ \ m_{reactants} = m_{products} \ }}
<h3>Learn more</h3>
  1. Flammability as one of the chemical properties brainly.com/question/1767022
  2. Carbon atoms can form four covalent bonds brainly.com/question/3064597
  3. About the solution as a homogeneous mixture  brainly.com/question/637791

Keywords: methane and oxygen, react to form carbon dioxide and water, combustion, to produce, the conservation of mass, the word equation, the balanced equation, Lavoisier

3 0
3 years ago
Read 2 more answers
Balance the half reaction, c5o5 2-(g) â co3 2-(aq), taking place in basic media. which answer below describes how many hydroxide
Ludmilka [50]

Answer is: 20 ions, left side.

Unbalanced half reaction: C₅O₅²⁻(g) → CO₃²⁻(aq).

1) There are 5 carbon atoms on the left side of half reaction and 1 carbon atom on right, so first add coefficient 5 in fron of carbon dioxide to balance carbon atoms: C₅O₅²⁻(g) → 5CO₃²⁻(aq).

2) Because there are more oxygen atoms on the right, add OH⁻ ions on the left side of half reaction and water on the right: OH⁻(aq) + C₅O₅²⁻(g) → 5CO₃²⁻(aq) + H₂O(l).

3) Balance oxygen (25 atoms on boths side) and hydrogen (20 atoms on both side of half reaction) atoms:

Balanced half reaction: 20OH⁻(aq) + C₅O₅²⁻(g) → 5CO₃²⁻(aq) + 10H₂O(l).

7 0
3 years ago
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