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3 years ago

11

what is the balanced chemical equation when solid calcium oxide and carbon dioxide gas are formed by the decomposition of solid

calcium carbonate (CaCO3)

1 answer:

Ilya [14]3 years ago

8 0

CaO(s) + CO2(g) -> CaCO3(s)

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qwelly [4]

Answer:

98.4 kPa

Explanation:

Step 1: Given and required data

Partial pressure of water vapor at 60°C (pH₂O): 19.9 kPa (this info is tabulated)

Partial pressure of nitrogen (pN₂): 53.0 kPa

Partial pressure of helium (pHe): 25.5 kPa

Step 2: Calculate the total pressure of the gaseous mixture

The total pressure of the gaseous mixture (P) os equal to the sum of the partial pressures of the gases that form it.

P = pH₂O + pN₂ + pHe

P = 19.9 kPa + 53.0 kPa + 25.5 kPa = 98.4 kPa

8 0

3 years ago

A balanced chemical equation contains the term "2Ba(OH)2⋅8H2O." How many atoms of each element does this represent in the molecu

PSYCHO15rus [73]

Answer:

$\begin{gathered} \text{Barium = }1.204\times10^{24}\text{ atoms} \\ \text{Oxygen = }1.204\times10^{25}\text{ atoms} \\ \text{Hydrogen = }2.1672\times10^{25}\text{ atoms} \end{gathered}$

Explanation:

Here, we want to know the number of atoms of each of the elements present in the given term

For the Barium, it is only affected by the external 2, so we have 2 Barium atoms only

For oxygen, we have a set in OH and another in H2O. For the OH own, we have 2 oxygen atoms and for the H2O , we have 8 atoms. That makes a total of 10, which when multiplied by the first 2 outside, gives 20

For Hydrogen, we have two sets, one with OH and the other with H2O

For the one with OH, we have 2 while for the one with H2O, we have 16. That makes a total of 18 which when multiplied by 2 gives a total of 36

Thus, we have each of the elements and their counts as follows:

Barium = 2

Oxygen = 20

Hydrogen = 36

Mathematically:

$1\text{ mole = 6.02 }\times10^{23}\text{ atoms}$

Thus:

$\begin{gathered} 2\text{ moles of Ba will contain} \\ 2\times\text{ 6.02 }\times10^{23}\text{ atoms = 1.204}\times10^{24}\text{ atoms} \\ \\ 20\text{ moles of oxygen will contain:} \\ 20\times\text{ 6.02}\times10^{23}\text{ atoms = 1.204}\times10^{25}\text{ atoms} \\ \\ 36\text{ moles of hydrogen will contain} \\ 36\times6.02\times10^{23}\text{ atoms = 2.1672}\times10^{25}\text{ atoms} \end{gathered}$

5 0

2 years ago

Mole used in a chemistry sentence

katrin [286]

One mole of NaOH (Sodium hydroxide) is equal to 39.997 grams of NaOH.

7 0

3 years ago

A spectrum of a distant object reveals a sequence of known absorption lines that are all shifted to shorter wavelengths. What ca

FrozenT [24]

Answer: It shows that the object is supposedly moving toward the observer

Explanation: A spectrum typically displays intensity and wavelength which characterises light.

4 0

4 years ago

The percent composition of carbon in C6H12O6 is:

nata0808 [166]

To calculate percent composition, you first need to find the molar mass of C (carbon), H (hydrogen) and O (oxygen).
C is 12.01
H is 1.00
O is 16

Then multiply each by the number of atoms of each element in the formula (the number that comes after each element in the equation for example C6 means 6 carbon atoms.

C: 12.01 x 6= 72.06
H: 1x12= 12
O: 16x6= 96

Then add them up.
72.06+ 12+ 96= 180.06

Now find the percent composition of carbon.

72.06/ 180.06 x 100= 40.01%

So the answer is C 40%.

8 0

4 years ago