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3 years ago

Please help!!!!! Please help!!!!!

Chemistry

2 answers:

Dafna11 [192]3 years ago

5 0

A chemical bond is an attraction between two atoms.

A ionic bond is A bond formed when atoms transfer electrons.

lesantik [10]3 years ago

3 0

Answer:

1.B

2.A

3. B

Explanation:

1. A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing

2. so 2 is electrons of one atom are transferred permanently to another atom.meaning the answer is A

3. is When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.

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What is the electron configuration of a chlorine ion in a compound of BeCl2?

mestny [16]

The electronic configuration of a chlorine ion in BeCl2 compound is

[2.8.8]^- (answer B)

chlorine atom gain on electron form Be to form chloride ions
chlorine atom has a electronic configuration of 2.8.7 and it gains one electron to form chloride ion with 2.8.8 electronic configuration

8 0

3 years ago

Read 2 more answers

Never mind, question solved.

Alchen [17]

The answer to the problem is 100

5 0

1 year ago

NO LINKS PLEASE! Why does dye dropped into a cup of water eventually spread throughout the water?

Nezavi [6.7K]

Answer:

Explanation:

okay, you need to look at the structures of the particles of matter in the solid, liquid and gas.

particles in a solid are in fixed positions, where they can only vibrate in those positions ( take a look at ice, or rather, a brick)
liquids have very small or rather, no spaces between them, but they can slide or rub against each other, like people in a really tight crowd I guess
gas particles have very large spaces between them and they move randomly. these exibit what's called brownian motion.

since water particles (and all other liquid particles) have negligible spacings and limited movement, that allows the dye particles to move from a region of high concentration to that of a low concentration. the aim for this is for the mixture/solution to reach an equilibrium, that is the mixture must get to a point where all regions have the same concentration of the dye.

you can refer to your coursebooks :)

correct where wrong please:)

5 0

2 years ago

.an open flask contains 0.200 mol of air. atmospheric pressure is 745 mmhg and room temperature is 68˚f. how many moles are pres

aleksklad [387]

0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

What is ideal gas constant ?

The ideal gas constant is calculated to be 8.314J/K⋅ mol when the pressure is in kPa.
The ideal gas law is a single equation which relates the pressure, volume, temperature, and number of moles of an ideal gas.
The combined gas law relates pressure, volume, and temperature of a gas.

We simple use this formula-

The basic formula is PV = nRT where. P = Pressure in atmospheres (atm) V = Volume in Liters (L) n = of moles (mol) R = the Ideal Gas Law Constant.

68F = 298.15K

V = nRT/P = 0.2 * 0.08206 * 298.15K / (745/760) = 4.992Liters

n = PV/RT = 1.1atm*4.992L/(0.08206Latm/molK * 306K)

n = 0.219 moles

Therefore, 0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

Learn more about ideal gas constant

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2 years ago

3. What agency tracks the activities of typhoon that enters PAR?

SOVA2 [1]

Answer:

D. Philippine Atmospheric, Geophysical and Astronomical Services

Administration (PAGASA)

Explanation:

4.C. 62.0 kph

5 0

3 years ago