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3 years ago

Compare your circulatory system to a busy street in a city or town.

Chemistry

1 answer:

White raven [17]3 years ago

7 0

City individuals -different cells. Group of individuals - Organ systems. City Road System- Circulatory system.

<u>Explanation:</u>

Any city has population. The individuals of the population can be considered as the cells that are present in a human body. As a city cannot be formed with individuals, the human body cannot survive without cells. These individuals will belong to different profession and they go to an organisation for doing various work.

These can be compared with the organ system of human body. These organ systems will be performing different functions. The network of any rod in a city can be compared with the circulatory system of human body. As it helps individuals to reach their home of any destination, the presence of arteries and veins can be compared with the highways and capillaries can be associated with side ways of the road system.

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Three 10 g samples of sugar are represented in the diagram below. Sample A dissolves in water more slowly than sample B. Sample

lorasvet [3.4K]

Sample A dissolves most slowly because it tells us, first off, that A dissolves slower than B. It also tells that B dissolves more slowly than C. This means that’s A is slower than B and C, because there is no way A would be faster than C if B is already slower (because A is slower than B.) I hope this helps. :)

5 0

3 years ago

Which of the following compound names is obviously INCORRECT?

baherus [9]

This question comes with these answer choices:

a) K₃N (potassium nitride)

b) TiO₂ (titanium(II) oxide)

c) SnBr₄ (tin(IV) bromide)

d) PBr₅ (phosphorus pentabromide)

e) CaS (calcium sulfide)

Answer: option b) TiO₂ (titanium(II) oxide)

Justification:

a) K₃N (potassium nitride)

K⁺¹ is the correct ion (cation) of potassium: oxidation state 1+.

N⁻³ is the correct anion of nitrogen: oxidation state 3⁻.

According to accepted IUPAC nomenclature rules, the name of the anion is nitride, so the name potassium nitride is correct.

b) TiO₂ (titanium(II) oxide)

When you calcualte the oxidation state of Ti, it is 4+, since (4+) + 2(2-) = 4 - 4 = 0.

So, the oxidation number of titanium is 4, and the correct name of the compound is titanium(IV) oxide.

The name titanium(II) oxide indicates that the oxidation state of Ti is 2, which is not true.

c) SnBr₄ (tin(IV) bromide)

It is correct because the oxidation state of Sn is 4+.

d) PBr₅ (phosphorus pentabromide)

It is correct because they are using the (accepted) systematic nomenclature in which the prefix is used to indicate the number of atoms in the formula.

Penta means 5, so penta bromide indicates 5 atoms of bromine.

e) CaS (calcium sulfide)

It is correct using the systematic nomenclature, because there is one atom of Ca and one atom of S.

7 0

4 years ago

Please help! Can someone give me answers for 2.08 Graded Assignment: Boiling and Melting Points Exploration for 8th grade scienc

Alborosie

Answer:

1. Looking at the line plots on your graph, describe how boiling point and melting point vary with respect to atomic number.

As the atomic number increases, the boiling point increases due to there being more electrons, which creates a larger strength of negative charge around the nucleus of the atom.

2. Now look at the segment of the graph between the two data points marked with black squares. Describe how the boiling point and melting point plots behave between these points. Be as specific as possible.

The graph shows relation between the melting point and the boiling point

3. On your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. Locate these elements on your periodic table. What term or description would you use to identify these elements with respect to the periodic table?

All of these elements can be found in the second period of the periodic table.

6. After reviewing your answers to questions 2 and 4 above, would you define boiling point and melting point as a periodic table family trend (vertical groups), period trend (horizontal rows), or neither? Explain your answer.

Neither, boiling and melting point per element varies from element to element on the periodic table. Family trends and period trends determine what kind of element each aspect is.

7. Using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. Explain your answers.

Gas would be room temperature because it fills up its container and helps the temperature of the room.

Explanation:

4 0

3 years ago

a 10 kg box sits on the floor. approximately how high would you have to lift the box to increase gravitational potentail energy

Misha Larkins [42]

Uhhhhhhhhhhbi think it’s a carrot

3 0

3 years ago

2. Lead (IV) carbonate

Tema [17]

Pb (CO3)2 I’m assuming you just need to convert it to the formula.

8 0

3 years ago