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Svetlanka [38]
3 years ago
11

C What mass of gas is present in48 cm of oxygen. O2​

Chemistry
1 answer:
xenn [34]3 years ago
7 0

Answer:

carbon dioxide

Explanation:

because we breath in oxygen and breath out Carbon

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How many grams of aluminum chloride can be produced from 7.32g of ammonium perchlorate?
Alla [95]

Answer:

2.77g of AlCl_{3} can be produced.

Explanation:

Use stoichiometry.

Balanced equation: 3Al + 3NH_{4} ClO_{4} ⇒ Al_{2} O_{3} + AlCl_{3} +3NO + 6H_{2} O

NH_{4} ClO_{4}  :  AlCl_{3}

      3        :     1                        **n=\frac{m}{M}

 0.0623**   :    x                        n=\frac{7.32}{117.49}   = 0.0623

      3x=0.0623\\x=0.020767

n=\frac{m}{M}    

m=nM

m= (0.020767)(133.34)

m= 2.77g                                  

5 0
2 years ago
How many grams of solid potassium hypochlorite should be added to 2.00 L of a 0.244 M hypochlorous acid solution to prepare a bu
Olin [163]

Answer:

8.2763 g

Explanation:

Considering the Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution as:

pH=pKa+log[base]/[acid]

Where Ka is the dissociation constant of the acid.

Given that the acid dissociation constant = 3.5×10⁻⁸

pKa = - log (Ka) = - log (3.5×10⁻⁸) = 7.46

Given concentration of acid = [acid] = 0.244 M

pH = 6.733

So,

6.733 = 7.46+log[base]/0.244

[Base] = 0.0457 M

Given that Volume = 2 L

So, Moles = Molarity × Volume

Moles = 0.0457 × 2 = 0.0914 moles

Molar mass of potassium hypochlorite = 90.55 g/mol

Mass = Moles × Molar mass = (0.0914 × 90.55) g = <u>8.2763 g</u>

7 0
4 years ago
Once a slide is prepared and placed onto the microscope, the magnification and focus need to be altered. Describe how to change
Harlamova29_29 [7]

Answer:

我實際上不知道答案,我只是為了點數而這樣做,哈哈,祝你好運哈哈

Explanation:

我實際上不知道答案,我只是為了點我實際上不知道答案,我只是為了點數而這樣做,哈哈,祝你好運哈哈數而這樣做,哈哈,祝你好運哈哈

5 0
3 years ago
Read 2 more answers
Electron configurations are a shorthand form of an orbital diagram, describing which orbitals are occupied for a given element.
kipiarov [429]

Answer:

[Ar] 3d10 4s2 4p3 is shorthand, 1s22s22p63s23p63d104s24p3 long hang

Explanation:

The shorthand is made using the lowest & closest noble gas, and picking up where it leaves off as follows, and longhand is made from a followed pattern you can easily find

3 0
3 years ago
Read 2 more answers
Which of the following is the best definition of a physical property?
Harlamova29_29 [7]

Answer:

The answer is either A or C figure it out sorry

3 0
3 years ago
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