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77julia77 [94]
3 years ago
5

Need help with these problems

Chemistry
1 answer:
jeka943 years ago
5 0
16. A
17. B
18. B
19. B
20. A
21. B
22. A
23. D
24. C
25. D
26. A
27. B
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Convert 1.65 × 1024 atoms of carbon to moles of carbon.
gogolik [260]
The number of moles in a substance indicates the amount of the substance that contains the same number of particles as 12 g of the Carbon-12 isotope [or equivalent to 6.02 × 10²³] (which is used as a standard in the world of moles).

Now,

          if     6.02 × 10²³ atoms are found in 1 mole of C
   then let  1.65 × 10²⁴ atoms are found in     x

⇒     x  =    (1.65 × 10²⁴)  ÷  (6.02 × 10²³)

            =  2.7409 mol
<span>

A sample of 1.65 × 10
</span>²⁴ atoms of Carbon (C) would contain ~ 2.74 mol  
6 0
3 years ago
What is the charge on an atom with an equal number of protons and electrons?
dexar [7]

Answer: the answer is a netrual bond

Explanation: a netural bond happens when the number of electrons are the same as the number of protons.

7 0
3 years ago
Read 2 more answers
1. What is the phase (state) symbol for a chemical that is a gas? *
Andreas93 [3]
(g) is the correct answer
5 0
3 years ago
Calculate the amount of miles of HCI is needed to make 500.0 mL of a 0.200M solution
frozen [14]

Answer: 0.4 moles

Explanation:

Given that:

Amount of moles of HCI = Z (let unknown value be Z)

Volume of HCl = 500.0 mL

Convert 500.0 mL to liters

If 1000ml = 1L

500.0 mL = (500.0 mL/1000mL) = 0.5L

Molarity of HCl solution = 0.200M

Recall that molarity of a solution is obtained by dividing the amount of moles by volume in liters

i.e Molarity = Amount in moles/volume

0.200M = Z x 0.5L

Z = 0.200M / 0.5L

Z = 0.4 moles

Thus, 0.4 moles of HCl is needed to make the solution

3 0
3 years ago
Ok So there is this boy that I like. He is short, he has curly hair, and freckles. He is my brothers best friend. But I don't th
Temka [501]

Answer:

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Explanation:

asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2asw342253463421q412qq24q2

6 0
3 years ago
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