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Elza [17]
3 years ago
14

..can someone answer these questions ive already posted this question 16 times and I dont have much points left so please anyone

can u please answer these questions!

Chemistry
2 answers:
noname [10]3 years ago
7 0

Answer

  1. A
  2. D
  3. D
  4. A
  5. B
  6. A

This is what I got, but i'm mot sure if I'm right

Assoli18 [71]3 years ago
3 0
A D D A B A
Those are all the answers for those questions
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Well it’s the first answer couches
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2 years ago
Calculate the grams of sodium hydroxide formed when 2.24 moles of sodium oxide react with water
Romashka [77]
The balanced reaction is 
Na2O + H2O --> 2NaOH

If 2.24 moles of sodium oxide react, that means 4.48 moles of NaOH is formed as it is a 1 to 2 stoichiometric relationship.

Now we multiply by the molar mass to get grams.

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6 0
3 years ago
How many moles of mercury, Hg, are there in 1.30 x 10^7 atoms of murcury? PLEASE HELP, IT'S URGENT! Thank you! (:
vodka [1.7K]
1 mole Hg ---------------- 6.02x10²³ atoms
??  ------------------------- 1.30 x10⁷ atoms

1.30x10⁷ x 1 / 6.02x10²³ =

= 1.30x10⁷ / 6.02x10²³ => 2.159x10⁻¹⁷ moles

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7 0
3 years ago
Hi how are you today well have a great rest of your day
amid [387]

Answer:

I'm well and same to you

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6 0
2 years ago
Read 2 more answers
12. What is the frequency of a photon with an energy of 3.03 x 10-19 J?
bazaltina [42]

Answer:

u=4.57x10^5GHz

Explanation:

Hello.

In this case, given the formula:

E=h*u

Whereas E is the energy, h the Planck's constant and u the frequency of the photon. Thus, solving for it, we obtain:

u=\frac{E}{h}=\frac{3.03x10^{-19}J}{6.63x10^{-34}J*s}\\  \\u=4.57x10^{14}s^{-1}

Or also:

u=4.57x10^{14}Hz*\frac{1GHz}{1x10^9Hz}\\ \\u=4.57x10^5GHz

Best regards.

5 0
3 years ago
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