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larisa86 [58]
3 years ago
9

The colour of RBC is Red .why?​

Chemistry
1 answer:
RoseWind [281]3 years ago
7 0

Answer: fat show the first half and a lot of people in a row in this rr

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A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a
torisob [31]

Answer:

C) k_a=1.3\times 10^{-5}

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M

C = 0.100 M

2.94=-log(\sqrt{k_a\times 0.100})

\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94

\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}

k_a=1.3\times 10^{-5}

4 0
3 years ago
Give the name of the following molecule. EXTRA POINTS PLEASE HELP
Rudik [331]
There isn t a 'middle' carbon  because there  is an even number of them

If the methyl group braches off the 3rd carbon the name is

hexa-3-methyl-3-ene 
3 0
3 years ago
Which answer best describes the transfer of heat that occurs when 1.70 mol of h2 reacts?
ElenaW [278]
<span>Answer – We are given, 2H2+O2 ----> 2H2O , deltaH = -48.4 kJ Moles of H2 =1.8 moles From the above given balanced equation We know, 2 moles of H2 = -48.4 kJ So, 1.8 moles of H2 = ? kJ = 1.8 moles of H2 X -48.4 kJ / 2 moles of H2 =-43.6 kJ So, when 1.8 mol of H2...</span>
7 0
4 years ago
Which of the following aligns with the definition of Arrhenius acids?
irga5000 [103]

Answer:

The answer is 3. Arrhenius acids form hydronium ions in water

Explanation:

From the notes my teacher gave me.

Hopefully this helps, have a nice day.

Also by any chance, do you go to Freedom High School?

7 0
3 years ago
An empty plastic or glass dish being removed from a microwave oven can be cool to the touch, even when food on an adjoining dish
Murljashka [212]

Answer:

See explanation

Explanation:

Microwaves work by flipping water molecules upside down, then right side up again, and so on at very high speeds, and the friction generates heat. Some glass or plastic isn't affected by the microwaves, so the molecules don't get flipped, and so no friction occurs and no heat is produced, leading to the dish not being heated up.

3 0
2 years ago
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