The ion formed by an atom of tin when it loses four electrons is called what?

A compound has the following percentages by mass: barium, 58.8%; sulfur, 13.74%; oxygen, 27.43%. Determine the empirical formula

lys-0071 [83]

Answer:

BaSO₄

Explanation:

Let's assume we have 100 g of the compound. If that's the case we would have:

58.8 g of Ba

13.74 g of S

27.43 g of O

Now we convert the masses of each element into moles, using their respective molar masses:

58.8 g Ba ÷ 137.327 g/mol = 0.428 mol Ba

13.74 g S ÷ 32 g/mol = 0.429 mol S

27.43 g O ÷ 16 g/mol = 1.71 mol O

We divide those moles by the lowest number among them:

0.428 mol Ba / 0.428 = 1

0.429 mol S / 0.428 ≈ 1

1.71 mol O / 0.428 = 4

We can express those results as Ba₁S₁O₄, meaning the empirical formula is thus BaSO₄.

5 0

3 years ago

ANSWER ASAP!

ludmilkaskok [199]

Answer:

whats the question so i can answer?

6 0

3 years ago

Which of these acids occurs naturally in the body and performs important regulatory functions? carbonic acid acetic acid magnesi

Svetach [21]

Answer: Carbonic acid occurs naturally in the body and performs important regulatory functions.

Explanation: Carbonic acid ( $H_2CO_3$ ) is an acid formed from the carbon dioxide present in the body. It is also known as the respiratory acid as it helps in the transport of carbon dioxide in the body.

With the help of enzyme Carbonic Anhydrase, carbon dioxide is converted into carbonic acid. This acid is an unstable intermediate which gets dissociated into bicarbonate ions ( $HCO_3^-$ ) and $H^+$ ions. immediatley.

Therefore, Carbonic acid performs important regulatory functions in the body.

4 0

4 years ago

Read 2 more answers

A chemist prepares a solution of aluminum sulfate (Al2(SO4) by weighing out 116.0 g of aluminum sulfate into a 450. mL volumetri

trasher [3.6K]

Answer:

0.0733 mol /dL

Explanation:

Mole -

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the information of the question ,

w = 116.0 g

As we know, molecular mass of aluminum sulfate ,

m = 342.15 g/mol

n = w / m

n = 116.0 g / 342.15 g/mol = 0.33 mol

Molarity -

Molarity of a substance , is the number of moles present in a liter of solution .

M = n / V

M = molarity

V = volume of solution in liter ,

n = moles of solute ,

The unit is mol / L ,

Hence , from the question, the value of molarity is asked ,

From the information of the question ,

V = 450 mL ,

Since,

1 mL = 0.01 dL

As, the unit asked in the question is in dL,

V = 4.5 dL

n = 0.33 mol ( as calculated above )

Using the above formula ,

M = n / V

M = 0.33 mol / 4.5 dL

M = 0.0733 mol /dL

M =

5 0

3 years ago

What might happen to global atmospheric carbon levels if the polar ice caps were to melt?

kolbaska11 [484]

If the Arctic became completely ice-free and phytoplankton productivity levels were maintained, Arrigo and his colleagues calculated that the new carbon sink could in theory absorb an extra 160 million tonnes of carbon each year.

6 0

4 years ago