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3 years ago

2. (10 Points) If the experiment had continued with you adding an 8 kg weight to

Chemistry

1 answer:

vaieri [72.5K]3 years ago

4 0

Answer: picture is work for # 1,2,4,5,7

Explanation: number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.

number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.

hope this helps :))

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A 20.38 gram sample of cobalt is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 31.47 g. Dete

Viefleur [7K]

Answer: The empirical formula of the metal sulfide is $CoBr_{2}$ .

Explanation:

Given: Mass of metal = 20.38 g

Mass of metal sulfide = 31.47 g

Moles is the mass of a substance divided by its molar mass.

So, moles of cobalt (molar mass = 59 g/mol) are as follows.

$Moles = \frac{mass}{molarmass}\\= \frac{20.38 g}{59 g/mol}\\= 0.345 mol$

Moles of bromine (molar mass = 80 g/mol) are as follows.

$Moles = \frac{(31.47 - 20.38) g}{80 g/mol}\\= \frac{11.09 g}{80 g/mol}\\= 0.138 mol$

Now, the ratio of number of moles of cobalt and number of moles of bromine are as follows.

Moles of Co : Moles of Br = 1 : 2

Hence, the empirical formula is $CoBr_{2}$ .

Thus, we can conclude that the empirical formula of the metal sulfide is $CoBr_{2}$ .

6 0

3 years ago

What is the molarity of a solution of 3 moles (mol) of FeBra

Snezhnost [94]

Answer:

Explanation:

3 moles per Liter = 3 molar

4 0

3 years ago

If oxygen has an atomic number of 8 and an atomic mass of 16, how many protons, neutrons and electrons would oxygen have?

antiseptic1488 [7]

Answer:

The oxygen we breathe is not in atomic form. It is in its molecular form, which is two oxygen atoms joined together by bonds, and between its two atoms, this molecule has 16 protons, 16 electrons, and most commonly 16 neutrons. Answer 5: An oxygen atom contains eight protons.

8 0

3 years ago

Balance equations practice

Margarita [4]

Answer:

1 - B) 2 - B) 3 - A)

Explanation:

1. C3H8 + 5O2 → 3CO2 + xH2O.. Find 'X'.

A) 3

B) 4

C) 5

D) 6

2. 4Al + 3O2 → xAl2O3. Find 'X'

A) 3

B) 2

C) 4

D) 5

3. FeCl3 + 3NaOH → Fe(OH)3 + xNACl. Find 'x'

A)3

B) 4

C)5

D)6