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Romashka-Z-Leto [24]
3 years ago
13

Dentre as alternativas a seguir,a única que é uma mistura é: ( )Um átomo de oxigenio ( )Àgua destilada ( )O ar atmosférico ( )O

gás ozoio me ajudem por favor...
Biology
1 answer:
riadik2000 [5.3K]3 years ago
7 0

Answer:

Atmospheric air  

Explanation:

Atmospheric air is a mixture of nitrogen, oxygen, argon, and small amounts of other gases.

A is wrong. A flask of oxygen atoms has nothing else in it. The O atoms are a pure substance.

B is wrong. A flask of distilled water contains only water. The water is a pure substance.

D is wrong. A flask of ozone contains only ozone. Ozone is a pure substance,

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A client says, "alcohol is not the cause of my problems. i can stop drinking any time i want." what is the short-term goal of th
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It is important to make the client understand that while alcohol might not be the cause of their problems or all of their problems it does affect the process of their decision making depending on the situation and how they feel towards different situations. A short-term goal would be to go a week without drinking alcohol and to note their changes in mood, behavior towards others and different challenges that they face. Another option is to set a "challenge" to see how long the client can go without the consumption of alcohol, the longer they go without the bigger the changes they will see in their day to day life.
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2 years ago
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When the pulmonologist discusses the condition in which a series of alveoli in the left lower lobe receive adequate ventilation
Vitek1552 [10]

Answer:

b. Alveolar dead space

Explanation:

Based on the information provided within the question it can be said that the statement that would best indicate that the nurse understands the condition would be "Alveolar dead space". This is because, this is the name of the condition being described by the pulmonologist. It is the sum of the volumes of the alveoli that are ventilated but not perfused due to almost no blood flowing through their pulmonary capillaries.

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3 years ago
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Page 201 11.4. Give an example of a homologous or vestigial trait, and explain how such traits support the theory of common desc
Gnoma [55]
<h2>Homologous</h2>

Explanation:

  • <em>Two or more species share a unique physical feature,</em> for example, an unpredictable bone structure or a body plan, they may all have acquired this component from a typical predecessor.
  • Physical highlights shared because of developmental history (a typical progenitor) are said to be homologous.  
  • <em>The front flippers of whales and the forelegs of four-legged vertebrates like canines and crocodiles are completely gotten from the equivalent tribal tetrapod structure.</em>
4 0
3 years ago
How many grams of the compound in the figure above are required to make 1 liter of a 0.5 M solution? (Note: The atomic masses, i
Dafna1 [17]

Answer:

This question is incomplete as there is no figure in the question but the compound in the figure is Ethanoic acid (CH3COOH). Hence, we can calculate the mass.

The answer is: 30grams

Explanation:

According to the question, the volume of the compound (CH3COOH) is 1litre while the molar concentration is 0.5M

Molarity or Molar concentration is calculated using the formula:

M= n/V

Where; M= Molarity (M) = 0.5M

n= number of moles (mol)

V= Volume (V) = 1L

Hence, number of moles (n) = M × V

n = 0.5 × 1

n = 0.5 moles.

To calculate the mass in grams of CH3COOH, we say;

Number of moles (n) × molar mass (MM)

Since atomic mass for (C= 12, H= 1 and O=16)

Molar mass of CH3COOH:

= 12 + 1(3) + 12 + 16 + 16 + 1

Molar mass of CH3COOH = 60g/mol

Mass (in grams) of CH3COOH = 0.5 moles × 60g/mol

Mass = 30grams.

Therefore, 30grams of CH3COOH compound are required to make 1 liter of a 0.5 M solution.

6 0
3 years ago
Most viruses are about _____ times smaler than the average cell.
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Answer:

A) 1000

Most viruses are 1000 times smaller than the average cell

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