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3 years ago

Answers only please 100pts and brainliest. you will be reported for wrong answers.

Chemistry

2 answers:

Alenkinab [10]3 years ago

7 0

Answer:

Explanation:

Ierofanga [76]3 years ago

5 0

Answer:

K= 25.16%

Mn= 34.59%

O= 40.25%

Explanation:

$KMnO_4$

Find the total mass of the compound. You can do this by multiplying by the molar mass.

$K=40*1=40\\Mn=55*1=55\\O=16*4=64$

add them:

40+55+64=159g

Now convert each element individually to grams using molar mass

$1molK(\frac{40gK}{1molK} )=40gK$

$1molMn(\frac{55gMn}{1molMn} )=55gMn$

$4molO(\frac{16gO}{1molO})=64gO$

Divide by the mass of the compound and multiply by 100

$K=\frac{40g}{159g} *100=25.16$

$Mn=\frac{55g}{159g}*100=34.59$

$O=\frac{64g}{159g}*100=40.25$

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The ratio of N₂ to hydrogen is 1:3
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<h3>Answer;</h3>

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3 years ago

<img src="https://tex.z-dn.net/?f=v%3D0.164m%2A8.3cm%2A12.4cm" id="TexFormula1" title="v=0.164m*8.3cm*12.4cm" alt="v=0.164m*8.3c

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Answer:

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Describe the three temperature scales used in the laboratory and in everyday life: the Fahrenheit, Celsius, and Kelvin scales.

yuradex [85]

Explanation:

Fahrenheit Scale

Fahrenheit temperature scale is the scale which is based on:

(a) For freezing point of the water, 32 °F.

(b) For boiling point of the water, 212 °F.

With interval between two being divided into equal 180 parts.

Celsius Scale

Celsius temperature scale is the scale which is based on:

(a) For freezing point of the water, 0 °C

(b) For boiling point of the water, 100 °C.

With interval between two being divided into equal 100 parts.

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3 years ago

The molar mass of an element is the mass of one

allochka39001 [22]

Answer:

The molar mass of an element is the mass of one mole of atoms of the element.

Explanation:

The molar mass of an element is its atomic mass, i.e. the mass in grams of one mole of atoms of the element.

Remember 1 mol is approximately 6.022 × 10²³.

So, 1 mol of atoms is 6.022 × 10²³ atoms.

The molar mass is an average: it is the weighted average mass of the natural isotopes of the element, taking into account their relative abundance.

For example, the molar mass or atomic mass of carbon is 12,0107 g/mol, instead of 12.0000, becasue carbon exists in several forms (isotopes), and so the weighted average is not a whole number.

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