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Digiron [165]
3 years ago
6

What is pH of a solution where [H+]=0.000044 M

Chemistry
1 answer:
enot [183]3 years ago
8 0

Answer:

<em><u>pH = 4.36</u></em>

Explanation:

<em>F</em><em>r</em><em>o</em><em>m</em><em> </em><em>d</em><em>e</em><em>f</em><em>i</em><em>n</em><em>i</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>o</em><em>f</em><em> </em><em>p</em><em>o</em><em>t</em><em>e</em><em>n</em><em>z</em><em> </em><em>h</em><em>y</em><em>d</em><em>r</em><em>o</em><em>g</em><em>e</em><em>n</em><em>,</em>

<em>p</em><em>H</em><em> </em><em>=</em><em> </em><em>-</em><em>l</em><em>o</em><em>g</em><em>[H+]</em>

<em>p</em><em>H</em><em> </em><em>=</em><em> </em><em>-</em><em>l</em><em>o</em><em>g</em><em>(</em><em>0.000044</em><em>)</em>

<em>p</em><em>H</em><em> </em><em>=</em><em> </em><em>4</em><em>.</em><em>3</em><em>6</em>

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How many grams of ethanol c2h5oh can be made by the fermentation of 1150 g of glucose?
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Answer is: 588.15 <span>grams of ethanol.
</span>Chemical reaction: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂.
m(C₆H₁₂O₆) = 1150 g.
n(C₆H₁₂O₆) = m(C₆H₁₂O₆) ÷ M(C₆H₁₂O₆).
n(C₆H₁₂O₆) = 1150 g ÷ 180.16 g/mol.
n(C₆H₁₂O₆) = 6.38 mol.
From chemical reaction: n(C₆H₁₂O₆) : n(C₂H₅OH) = 1 : 2.
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5 0
4 years ago
If you have a gold chain that weighs 80.7 grams, what is the volume of the chain?​
just olya [345]

The volume of the gold chain is 4.18 cm³

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the volume of the chain. Details below:

<h3>How to determine the volume of the gold chain</h3>

The following data were obtained from the question:

  • Mass of gold = 80.7 g
  • Density of gold = 19.3 g/cm³
  • Volume of gold chain =?

Density = mass /volume

Cross multiply

Density × volume = mass

Divide both sides by density

Volume = mass / density

Volume of gold chain = 80.7 / 19.3

Volume of gold chain = 4.18 cm³

Learn more about density:

brainly.com/question/952755

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7 0
2 years ago
Why is citric acid added to food?
kobusy [5.1K]

C is wrong, the real answer is B: to add tartness, and the reason why is because citric acid comes from jam, jellies, and more! And that is why the answer B is the correct answer.

Hope this helped!

Nate

(P.S. if you buy jams and real the ingredients, it will say "citric acid." :))

8 0
3 years ago
Read 2 more answers
A girl is pushing on an object with a force of 25 N. A boy is pushing on the same object but from the other direction with a for
xenn [34]

Answer:

Since the force applied at both ends is acting in opposite directions, then the resultant force becomes negative.

= 35 - 25 = 10

7 0
3 years ago
How many grams of Na2O are produced when 70.7 g of Na reacts?<br> 4Na(s)+O2(g)→2Na2O(s)
LUCKY_DIMON [66]

Answer:

95.3 grams.

Explanation:

Relative atomic mass data from a modern periodic table:

  • Na: 22.990;
  • O: 15.999.

How many moles of Na are consumed?

M(\mathrm{Na}) = \rm 22.990\; g\cdot mol^{-1}.

\displaystyle n(\mathrm{Na}) = \frac{m(\mathrm{Na})}{M(\mathrm{Na})} = \rm \frac{70.7\; g}{22.990\;g\cdot mol^{-1}}=3.07525\;mol.

How many moles of \mathrm{Na_2 O} formula units will be produced?

Consider the ratio between the coefficient of \mathrm{Na_2 O} and that of \mathrm{Na} in the equation:

\displaystyle \frac{n(\mathrm{Na_2 O})}{n(\mathrm{Na})} = \frac{2}{4} = \frac{1}{2}.

As a result,

\displaystyle n(\mathrm{Na_2 O}) = n(\mathrm{Na}) \cdot \frac{n(\mathrm{Na_2 O})}{n(\mathrm{Na})} = \rm \frac{1}{2}\times 3.07525\;mol = 1.53763\; mol.

What will be the mass of that many \mathrm{Na_2 O}?

Formula mass of \mathrm{Na_2 O}:

M(\mathrm{Na_2 O}) = \rm 2\times 22.990 + 15.999 = 61.979\; g\cdot mol^{-1}.

m(\mathrm{Na_2 O}) = n(\mathrm{Na_2 O})\cdot M(\mathrm{Na_2 O}) = \rm 1.53763\; mol\times 61.979\; g\cdot mol^{-1} \approx 95.3\; g.

7 0
3 years ago
Read 2 more answers
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