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3 years ago

Describe left atrium

Chemistry

1 answer:

Mrac [35]3 years ago

5 0

Answer:

the Left atrium receive blood full of oxygen from the lung and then empties the blood into the left ventricle.

Explanation:

left atrium : one of the four chamber of the heart.

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The air in a 4.00 L tank has a pressure of 1.20 atm . What is the final pressure, in atmospheres, when the air is placed in tank

stellarik [79]

Answer:

P₂ = 1.92 atm

Explanation:

According to the boyle's law:

The pressure of given amount of gas at constant temperature and number of moles of gas is inversely proportional to the volume.

P₁V₁= P₂V₂

Given data:

Initial volume = 4.00 L

Initial pressure = 1.20 atm

Final volume = 2500 mL

Final pressure = ?

Solution:

First of all we will convert the volume into litter.

2500 mL × 1L/1000 mL = 2.5 L

P₁V₁ = P₂V₂

P₂ = P₁V₁ /V₂

1.20 atm×4.00 L = P₂ ×2.5 L

P₂ = 1.20 atm×4.00 L/ 2.5 L

P₂ = 4.8 atm. L/ 2.5 L

P₂ = 1.92 atm

4 0

3 years ago

Which of the following is teue of solids? A. They have less kinetic energy than liquids, gases, and plasmas. B.They have slightl

Oksi-84 [34.3K]

The correct answer is A because particles in solids are packed more compactly than those in liquids, gases, and plasmas, due to the decreased kinetic engergy

Hope this helps

8 0

3 years ago

Which one of the following does NOT suggest that a chemical reaction had occurred?

ad-work [718]

Post the answer choices please. So we can help you answer the question

8 0

3 years ago

Acenaphthylene, a hydrocarbon that is a constituent of a coal tar, is 94.71% and has a molar mass of 152.19 g/mol. What are the

dolphi86 [110]

Answer:

From what I personally know, Acenaphthylene 75%. Empirical Formula (Hill Notation): C12H8. CAS Number: 208-96-8. Molecular Weight: 152.19. Beilstein: 774092. EC Number:

Explanation:

Acenaphthylene, a polycyclic aromatic hydrocarbon is an ortho- and peri-fused tricyclic hydrocarbon. The molecule resembles naphthalene with positions 1 and 8 connected by a -CH=CH- unit. It is a yellow solid. Unlike many polycyclic aromatic hydrocarbons, it has no fluorescence. Acenaphthylene/Formula is C12H8.

I'm not sure if this will help you but this is what I know so I hope it does :)

5 0

3 years ago

The image shows a molecular model of a compound using balls and sticks. Each ball is an atom and each stick is a bond. If you we

jeka94

<h2><u>Full Question:</u></h2>

The image shows a molecular model of a compound using balls and sticks. Each ball is an atom and each stick is a bond. If you were to use balls and sticks to model a molecule of an element, how must your model differ from what’s shown?

A. The sticks must be shorter.

B. The balls must be the same color.

C. The balls must be smaller.

D. The balls must change to cubes.

<h2><u>Answer:</u></h2>

The balls must be of same colour.

Option B.

<h3><u>Explanation:</u></h3>

A Molecule is defined as the smallest part of an element or compound which can exist freely in nature. An element is define as the matter which is when divided into smallest particles gives only one type of particle or atom. Where as a compound is defined as the combination of different elements in a particular ratio which has properties totally different from the combining elements. So an element comprises of only one type of atoms.

In this picture we can see that there is a central atom which is marked in blue where as the other atoms are peripheral and marked in red. The bonds between the blue atom and red atoms are marked with sticks. So if only one type of atoms are present in the molecule then only one coloured balls will be seen. Then the the colour of the balls will be only one.

7 0

3 years ago