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Amiraneli [1.4K]
2 years ago
11

Please help D: anyone who helps with all the chemistry problems on my page will get Brainliest Answer on all!!! I have an hour t

o finish :[

Chemistry
1 answer:
Pavel [41]2 years ago
7 0
There are 6.022×1023 molecules in one mole of glucose so you would just divide this number by 100 and multiply the result by 54 which would leave you with 3326.67324 molecules in 0.54 moles of glucose
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25.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 28.11 mL of a 0.1311
LuckyWell [14K]

Answer:

Concentration of the H₂SO₄ solution is 0.0737 M

Explanation:

Equation of the neutralization reaction between the acid, H₂SO₄, and the base, NaOH, is given below:

H₂SO₄ + 2NaOH -----> Na₂SO₄ + 2H₂O

From the above equation, one mole of acid requires 2 moles of base for complete neutralization which occurs at phenolphthalein endpoint.

mole ratio of acid to base, nA/nB = 1:2

Concentration of the base, Cb = 0.1311 M

Volume of base, Vb, = 28.11 mL

Concentration of acid, Ca = ?

Volume of acid, Va + 25.0 mL

Using the formula, CaVa/CbVb = nA/nB

making Ca subject of the formula, Ca = Cb*Vb*nA/Va*nB

substituting the values into the equation

Ca = (0.1311 * 28.11 * 1) / 25.0 * 2 = 0.0737 M

Therefore, concentration of the H₂SO₄ solution is 0.0737 M

5 0
4 years ago
How many grams of ammonia (NH3) are produced when you react 4.76 grams of hydrogen (H2)
Andrews [41]

Answer: hre

Explanation:

N2(g) + 3H2-> 2NH3(g)  This is the balanced equation

Note the mole ratio between N2, H2 and NH3.  It is 1 : 3 : 2  This will be important.

 

moles N2 present = 28.0 g N2 x 1 mole N2/28 g = 1 mole N2 present

moles H2 present = 25.0 g H2 x 1 mole H2/2 g = 12.5 moles H2 present

Based on mole ratio, N2 is limiting in this situation because there is more than enough H2 but not enough N2.

 

moles NH3 that can be produced = 1 mole N2 x 2 moles NH3/mole N2 = 2 moles NH3 can be produced  

grams of NH3 that can be produced = 2 moles NH3 x 17 g/mole = 34 grams of NH3 can be produced

 

NOTE:  The key to this problem is recognizing that N2 is limiting, and therefore limits how much NH3 can be produced.

6 0
4 years ago
Read 2 more answers
What is a good description of potential energy? (1 point)
Brilliant_brown [7]

Answer:

I think the answer is stored energy

Explanation:

8 0
4 years ago
(environmental science) 1.which aspects of climate are most important to forest ecosystems?
mamaluj [8]
Probably the CO2 concentration. If the earth gets warmer by rising greenhouse gases (one of which is CO2), the amount of rainfall and precipitation increases. I am not an expert, but that's my first guess.
8 0
3 years ago
Read 2 more answers
Calculate the equilibrium constant Kp for this reaction, given the following information (at 299 K ): 2NO(g)+Br2(g)⇌2NOBr(g)Kc=2
Travka [436]

Answer:

2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)} , Kp = 0.08967

2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)} , Kp = 2.3×10³⁰

Explanation:

The relation between Kp and Kc is given below:

K_p= K_c\times (RT)^{\Delta n}

Where,

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)}

Given: Kc = 2.2

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2+1) = -1

Thus, Kp is:

K_p= 2.2\times (0.082057\times 299)^{-1}

<u>Kp = 0.08967 </u>

For the second equilibrium reaction:

2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)}

Given: Kc = 2.3×10³⁰

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2) = 0

Thus, Kp is:

K_p= 2.2\times (0.082057\times 299)^{0}

<u>Kp =  2.3×10³⁰</u>

3 0
3 years ago
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