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3 years ago

Fork is a metal or nonmetal ?

Chemistry

2 answers:

ExtremeBDS [4]3 years ago

6 0

Answer:

fork is a metal *what is u asking?*

Explanation:

marta [7]3 years ago

4 0

It is a metal because forks are made from metals

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Which of the following does not represent energy being converted? *

gtnhenbr [62]

Answer:

a book sitting on a desk (D)

Explanation:

this is true because all of the other objects are representing mostly potential to kinetic energy but the book is only potential energy

___________________________________________________________hope this helps pls make me brainliest :p

7 0

3 years ago

Read 2 more answers

Fumaric acid is an organic compound composed of 41.39% , 3.47% , and the rest oxygen. If 0.288 mol of fumaric acid has a mass of

Gnesinka [82]

Answer:

Molecular formula: C₄H₄O₄

Empirical formula: CHO

Explanation:

Centesimal composition of fumaric acid:

41.39% C

3.47% H

(100% - 41.39% - 3.47%) = 55.14% O

In 100 g of fumaric, we got:

41.39 g of C

3.47 g of H

55.14 g of O

If we take account that we have x mol of fumaric in x mass of the same compound (g/mol), we can determine molar mass.

33.4 g / 0.288 mol → 116 g/mol

Now, we can prepare this rules of three:

In 100 g of fumaric we have 41.39 g of C, 3.47 g of H, 55.14 g of O

Then 116 g of fumaric will have:

(116 . 41.39) / 100 = 48 g C

(116 . 3.47) / 100 = 4 g H

(116. 55.14) / 100 = 64 g O

If we convert the mass to moles, we reach the molecular formula:

48 g . 1mol /12 g = 4 moles C

4 g . 1mol /1g = 4 moles H

64 . 1mol/16 g = 4 moles O

Molecular formula: C₄H₄O₄

Empirical formula: CHO

5 0

4 years ago

Read 2 more answers

Acetone used for rinsing glassware Group of answer choices

Marysya12 [62]

Answer: 2

Explanation: n/a

5 0

3 years ago

Consider the fermentation reaction of glucose: C6H12O6 → 2C2H5OH + 2CO2 A 1.00-mol sample of C6H12O6 was placed in a vat with 10

inessss [21]

Answer:

% yield = 73.48 %

Explanation:

The fermentation reaction is:

C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

The percent yield of C₂H₅OH is given by:

$\% yield = \frac{m_{E}}{m_{T}} * 100$

<em>where $m_{E}$ : is the obtained mass of C₂H₅OH = 67.7g and $m_{T}$ : is the theoretical mass of C₂H₅OH. </em>

The theoretical mass of C₂H₅OH is calculated knowing that 1 mol of C₆H₁₂O₆ produces 2 moles of C₂H₅OH:

$m_{T} = mol * M$

<em>where M: is the molar mass of C₂H₅OH = 46.068 g/mol</em>

$m_{T} = 2 moles * 46.068 g/mol = 92.136 g$

Hence, the percent yield of C₂H₅OH is:

$\% yield = \frac{67.7 g}{92.136 g}*100 = 73.48 \%$

I hope it helps you!

3 0

3 years ago

A sample of metal has a mass of 23.04 g, and a volume of 5.31 ml. what is the density of this metal?

bija089 [108]

4.33898305 is the density
Divide mass/volume

5 0

3 years ago