Answer:

Each Hydrogen atom has one only one electron which is also its valence electron and Sulfur has six valence electrons. Thus, there are a total of eight valence electrons in H2S. In this compound, both the hydrogen atoms require one electron to make the covalent bond with Sulfur

6 0

3 years ago

A 544 mg of a mixture of fluorene and benzoic acid was weighed out and subjected to an extraction and recrystallization. After t

butalik [34]

Answer: The percent composition of fluorene is 33.08 % and benzoic acid is 36.03 %.

Explanation:

We are given:

Mass of mixture = 544 mg

Mass of fluorene after purification = $1.80\times 10^2mg=180mg$

Mass of benzoic acid after purification = 196 mg

To calculate the percentage composition of a substance in a mixture, we use the equation:

$\%\text{ composition of substance}=\frac{\text{Mass of substance}}{\text{Mass of mixture}}\times 100$

For fluorene:

$\%\text{ composition of fluorene}=\frac{180}{544}\times 100=33.08\%$

Hence, the percent composition of fluorene is 33.08 %

For benzoic acid:

$\%\text{ composition of benzoic acid}=\frac{196}{544}\times 100=36.03\%$

Hence, the percent composition of benzoic acid is 36.03 %

5 0

4 years ago

A gas in a cylinder with movable piston has an initial volume Of 88.2 ML at 35°C. The cylinder is heated at constant pressure un

Leona [35]

The temperature in degree celsius to which the gas was heated is calculated using the Charles law formula

that is V1/T1 =V2/T2
V1=88.2 ml
T1=35 +273 = 308 K
V2=123 ml
T2=?

by making T2 the formula of the subject T2=V2T1/V1

=(123 ml x308 k)/88.2 ml =429.5 K

in degree celsius = 429.5 -273= 156.5 degree celsius

7 0

3 years ago

What group is the element barium(Ba) In?A. 1B. 6C. 56D. 4​

What group is the element barium(Ba) In?A. 1B. 6C. 56D. 4