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3 years ago

Elements in the same group have similar properties because they have the same number of ?

Chemistry

2 answers:

Masja [62]3 years ago

8 0

Because their electronic configurations have the same number of electrons in the outermost shell.

solmaris [256]3 years ago

8 0

Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level. Group 1 elements are reactive metals called the alkali metals.

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Which equation is set up correctly to determine the volume of a 1.5 mole sample of oxygen gas at 22°C and 100 kPa?

LenKa [72]

The volume could be calculated by using V = n RT / P 

In which V = Volume
n = number of Moles
R= The Gas constant
T = Temperature (ideally this would be in Kelvin, but i don't see it in the option)
P = Pressure

I believe the answer is

V = (1.5mol) (0.08205 L*kPa/K*mol) (22Celsius)/100 kPa

6 0

3 years ago

The day to day condition of atmosphere is known as

vovikov84 [41]

Answer:

d) atmosphere pressure

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3 years ago

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How many elements are in Li2SO4?how many elements are in li2s 04 how many elements are in li2s 04

Free_Kalibri [48]

Answer:

Explanation:

the three elements involved in this compound are Li, S, O.

lithium, sulfur, and oxygen. Which create the ionic compound, "Lithium Sulfate."

7 atoms total, since there are two lithium, four oxygen, and one sulfate atom. this is a white inorganic salt.

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3 years ago

You are at home in your air conditioned garage. You are planning a family road trip from New York to Florida. You are lnfating t

Ksenya-84 [330]

Hello!

According to the Charles' Law, the volume of a gas is proportional to temperature when pressure is constant. When going from New York to Florida, if the pressure is left constant the volume of the tires will increase.

The final volume of the tires can be calculated from the following equation, derived from Charles' Law:

$V2= \frac{V1}{T1}*T2=\frac{10 L}{10degC}*32degC=32 L$

Have a nice day!

3 0

3 years ago

Ethanol and water appear the saame to the naked eye at 25C. Which properties can help a chemist distinguish between? denisty, ma

Oxana [17]

Explanation:

As it is known that there are two types of properties. These are extensive and intensive.

Extensive properties : Properties that depend on the size or amount of system. For example, mass, volume etc.

Intensive properties : Properties that do not depend on the size or amount of system. For example, density, melting point, specific heat capacity etc.

On the basis of these properties water and ethanol are distinguished as follows.

Density of water is 997 kg/ $m^{3}$ whereas density of ethanol is 789 kg/ $m^{3}$ . Both these liquids can be separated by intensive properties.
Melting point of water is zero degree celsius whereas melting point of ethanol is -114.1 degree celsius.
Specific heat capacity of water is 4.184 $J/g ^{o}C$ whereas specific heat capacity of ethanol is 2.46 $J/g ^{o}C$ .
Mass of the given liquids cannot be differentiated because they will keep on changing depending on the quantity required. As mass is an extensive property, therefore, it is difficult to differentiate between the two liquids.

Thus, we can conclude that properties like density, melting point, specific heat capacity can help a chemist distinguish between ethanol and water.

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3 years ago