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3 years ago

What system maintain the pH of human blood at very near 7.4?

2 answers:

8 0

The correct answer to this question is "The Buffer System." The system that maintain the pH of human blood at very near 7.4 is called the buffer system. The buffer effect don't allow the blood to change its pH. A buffer solution is typically composed of a weak acid and its conjugate base.

koban [17]3 years ago

5 0

Buffer systems in our body maintain the pH of blood to be at an optimum level which is at a range of 7.3-7.4. A buffer is a solution that resists changes in pH during the addition of an acid or a base. Our blood has a number of buffer systems. Examples are the bicarbonate buffer system and the hemoglobin buffer system.

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Please can someone help me??!

svp [43]

I believe the correct order of words should be:

Counterclockwise

Crescent

Full

Half

Faces?

Waxing

Right

Waning

Left

I am not sure on faces, but I don't see any other words from the bank that would fit that description. Hope these are correct and hope I helped!

4 0

3 years ago

9. A bond formed between a silicon atom and an oxygen atom is likely to be

Elanso [62]

<h2>Answer: </h2>

The answer is

O ionic

<h2>Explanation: </h2>

A bond formed between a silicon atom and an oxygen atom is likely to be: ionic

5 0

3 years ago

PLEASE HELP!!!

Olenka [21]

Answer:

7 moles

Explanation:

Given data:

Moles of hydrogen = 7 mol

Moles of water formed = ?

Solution:

Chemical equation:

2H₂ + O₂ → 2H₂O

Now we will compare the moles of water with hydrogen from balance chemical equation:

H₂ : H₂O

2 : 2

7 : 7

So in the presence of excess oxygen and 7 moles of hydrogen seven number of moles of water produced.

4 0

3 years ago

How many atoms are present in 48.60 g of Mg

Ganezh [65]

1.204 x 10 ( 24 ) atoms of magnesium are present.
In order to go from mass of magnesium there have to do 2 things

1. convert mass of Mg to moles of Mg using the molar mass of Mg as converted to a factor

2. convert moles of Mg to atoms of Mg using the Avogadro's number ( 6.02 x 10 (23) as a conversion factor

Hope my it helped a little :)

3 0

4 years ago

Help please it's due in 12 hours (20 points)

Rufina [12.5K]

Answer:

1) K and Rb

2) 20 protons, 20 neutrons, and 20 electrons.

Explanation:

1) If it's in the same column, it has the same # of valence electrons (e- on the outer shell), therefore similar chemical properties.

1) atomic #, 20, is the number of protons

2) subtract the mass number from # of protons, which you get 20 neutrons

3) Number of electrons in a neutral atom = number of electrons, which is 20. You can also check yourself by looking at electron configuration on a full periodic table.

8 0

2 years ago