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Shkiper50 [21]
3 years ago
10

If element x has 72 protons, how many electrons does it have? electrons

Chemistry
1 answer:
saw5 [17]3 years ago
6 0
Elements have neutral charges such as Na so if X has 72 protons + charges then it must also have 72 electrons with - charges

hope that helps
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Stoichiometric coefficients indicate the ratio between ________of given substances in a chemical reaction
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Answer:

b

Explanation:

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What does the poitof incidence mean?​
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Point of incidence: The point on the surface where the incident ray strikes the surface is called the point of incidence. Reflected ray: The ray of light that bounces back from the surface of an object is called a reflected ray of light.

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RIGHT ANWSER WILL BE MARKED BRAINLIEST
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11460

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Draw a correct Lewis structure for XeI2 (Xe in middle, surrounded by I's ) that puts a 0 formal charge on all atoms. How many lo
Alona [7]

1) The Lewis structure will be:

Xe

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I--I

In this structure, the xenon atom is surrounded by two iodine atoms, which are bonded to it through single bonds. Each iodine atom has one lone pair of electrons, for a total of 2 lone pairs on the central atom (xenon).

2) The molar mass of the gaseous compound is 0.416 g/mol.

To draw a correct Lewis structure for XeI2, we need to first count the number of valence electrons in the molecule. Xenon is a noble gas and has 8 valence electrons, while iodine has 7 valence electrons for a total of 23 valence electrons. To satisfy the octet rule and put a 0 formal charge on all atoms, we can use the following Lewis structure:

Xe

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I--I

To find the molar mass of the gaseous compound, we can use the ideal gas law:

M = dRT/P

Where M is the molar mass, d is the density, R is the ideal gas constant, T is the temperature, and P is the pressure.

Given that the density of the gas is 0.3876 grams/142 mL = 0.002736 grams/mL, the temperature is 150 + 273 = 423 K, the pressure is 775 torr = 775/760 atm = 1.0132 atm, and the ideal gas constant is 0.08206 L·atm/mol·K.

We can calculate the molar mass as follows:

M = (0.002736 g/mL) * (0.08206 L·atm/mol·K / (1.0132 atm)) * (423 K)

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Learn more about molar mass, here brainly.com/question/12127540

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1 year ago
Which of the highlighted carbon-oxygen bonds absorbs at a higher wavenumber in an IR spectrum?
skelet666 [1.2K]

Answer:

1. bond in the molecule on the right

Explanation:

CH3CH2-OH

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CH3CH__O

The compound above is an aldehyde due to the presence of the CHO bond. The wave number of the C = O  bond is given as; 1740-1720 cm^-1

Comparing both bonds, the C = O bond absorbs at a higher wave number.

5 0
3 years ago
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