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Troyanec [42]
3 years ago
14

Which of the following statements is true for all eukarya?

Chemistry
1 answer:
sammy [17]3 years ago
6 0

Answer:

A. their cells contain a nucleus

Explanation:

hope it helps

please mark me as a brainliest

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Neon has 2 isotopes. Neon-20 has a mass of 19:992 amu and
Alenkinab [10]

Answer:

20.0928.

Explanation:

The average atomic mass is (90 * 19.992 + 10* 21) / 100

= 20.0928.

6 0
2 years ago
What is the pH of a solution whose hydronium ion [H20+] (or proton [H+1)
pav-90 [236]

Answer:

pH =  -  log(7.6 \times  {10}^{ - 5} )  \\ pH = 4.12

8 0
2 years ago
Instruction
MrRa [10]

Answer:

An object at position A. has all potential energy

An object at position B. has about half potential and half kinetic energy

An object at position C. has all kinetic energy

Explanation:

I already did it and got all of them correct. I hope this helped!! :)

5 0
3 years ago
Which of the following is an example of a reaction that you've seen in your everyday life ?
soldier1979 [14.2K]
I believe this pertains to chemical reaction? So my guess would be answer A “Fire burning”

Don’t quote me though lol.
7 0
3 years ago
Read 2 more answers
10.
Andru [333]

Answer: 1.8 moles Fe and 2.7 moles CO_2 are produced.

Explanation:

The balanced chemical reaction is:

Fe_2O_3+3CO\rightarrow 2Fe+3CO_2  

According to stoichiometry :

3 moles of CO require 1 mole of Fe_2O_3

Thus 2.7 moles of CO will require=\frac{1}{3}\times 2.7=0.9moles  of Fe_2O_3

Thus CO is the limiting reagent as it limits the formation of product and Fe_2O_3 is the excess reagent.

As 3 moles of CO give = 2 moles of Fe  and 3 moles of CO_2

Thus 2.7 moles of CO will give =\frac{2}{3}\times 2.7=1.8moles  of Fe  and \frac{3}{3}\times 2.7=2.7moles  of CO_2

Thus 1.8 moles Fe and 2.7 moles CO_2 are produced.

7 0
2 years ago
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