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sladkih [1.3K]
2 years ago
13

Hey...how do you guys think I could fix a grade of D and F in the 4 weeks I have left? I believe it's possible just need some ti

ps
Chemistry
2 answers:
aleksklad [387]2 years ago
6 0
Why fake it? Why not mean it? I would do every extra credit possible. If the reason the grade is low because work is turned in late, I agree to ask if they'll accept late work. ( at my school the district won't allow late work ) If not, ask for help. Though, that's the first thing I would have done. Last, try your absolute best.
Sonja [21]2 years ago
5 0
Ok so, it all comes down to basically how nice the teachers are? Go to them and ask them personally if they'd take any late work or makeup work. Also ask (but in a very kiss butt way) if there was any chance theyd be willing to give you extra credit. The key to doing this is like basically just begging them and being super apologetic. Be fake and see if it gets you anywhere?
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1. Analysis of an unknown substance formerly used in rocket fuel reveals a composition of 93.28% nitrogen and 6.72% hydrogen by
Nitella [24]

Answer:

The formula of the compound is:

N2H2

Explanation:

Data obtained from the question:

Nitrogen (N) = 93.28%

Hydrogen (H) = 6.72%

Next, we shall determine the empirical formula for the unknown compound. This is illustrated below:

N = 93.28%

H = 6.72%

Divide by their molar mass

N = 93.28 /14 = 6.663

H = 6.72 /1 = 6.7

Divide by the smallest

N = 6.663 / 6.663 = 1

H = 6.72 /6.663 = 1

Therefore, the empirical formula is NH.

Now, we can obtain the formula of the compound as follow:

The formula of a compound is simply a multiple of the empirical formula.

[NH]n = 30.04

[14 + 1]n = 30.04

15n = 30.04

Divide both side by 15

n = 30.04/15

n = 2

Therefore, the formula of the compound is:

[NH]n => [NH]2 => N2H2

6 0
3 years ago
In the following reaction, how many grams of ammonia (NH3) will react with 27.8 grams of nitric oxide (NO)? 4NH3 + 6NO → 5N2 + 6
Rzqust [24]
<span>4NH</span>₃<span> + 6NO → 5N</span>₂<span> + 6H</span>₂<span>O

mol of NO  =  </span>\frac{mass of NO}{Molar Mass of NO}
 
                  =  \frac{27.8 g}{30.01 g / mol}
                   
                  =  0.93 mol

Based on the balance equation mole ratio of NH₃  :  NO  is   4 : 6
                                                                                            =  2 : 3

If mol  of NO  =  0.93 mol

then mol of NH₃ = \frac{0.93 mol  *  2}{3}
                           
                          =  0.62 mol

Mass of ammonia =  mol  ×  molar mass
          
                             =  0.62 mol   ×  17.03 g/mol
 
                             =  10.54 g

Therefore B is the best answer





3 0
3 years ago
Read 2 more answers
What happens to a liquid when you keep on cooling it until it changes?
Gnesinka [82]

Answer:

it turns into a solid

6 0
3 years ago
Use the element symbols to write the electronic configuration Na
Fofino [41]
Electron Configuration is the distribution of electrons of an atom or molecule in an atomic or molecular orbitals.

So Na, or Sodium has 11 electrons, so the number should add up to 11

Na: 1s² 2s² 3p⁶ 3s¹

Hope this helps!
8 0
3 years ago
Need immediate help!!!
Fantom [35]

Answer:

brainlest= help you

Explanation:

4 0
2 years ago
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