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kirill115 [55]
3 years ago
8

9) Which element in each pair has the larger ionization energy?

Chemistry
1 answer:
erastovalidia [21]3 years ago
6 0
I think the answer is C.
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1. What three types of atoms are in a glucose molecule?
Svetach [21]

Answer:

Carbohydrates,Monosaccharides,and disaccharides

Explanation: I'm good at science

3 0
3 years ago
If the half-life of a radionulide is 1 month, what percent remains after 4 months?
Aliun [14]

Answer:

6.25% of the original amount

Explanation:

half-life means that half is gone for every certain period of time. Because the half life is 1 month, only half of the 'radionulide' is left every month.

after 1 month= 50%

after 2 months= 25%

after 3 months= 12.5%

after 4 months= 6.25%

6 0
3 years ago
Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He.
Cerrena [4.2K]

Answer:

Answer :

The total pressure inside the cylinder is, 6.7 atm

The mole fraction of N_2 in the mixture is, 0.52

Solution :

First we have to calculate the total pressure inside the cylinder.

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

P_T=p_{N_2}+p_{O_2}+p_{Ar}+p_{He}

Now put all the given values is expression, we get the total pressure inside the cylinder.

P_T=3.5+2.8+0.25+0.15=6.7atm

Now we have to calculate the mole fraction of N_2 in the mixture.

Formula used :

pN_2=XN_2 x P_T

where,

P_T = total pressure = 6.7 atm

pN_2 = partial pressure of nitrogen gas = 3.5 atm

XN_2 = mole fraction of nitrogen gas = ?

Now put all the given values in the above formula, we get

3.5atm=XN_2 x 6.7atm

XN_2=0.52

Therefore, the total pressure inside the cylinder is, 6.7 atm and the mole fraction of N_2 in the mixture is, 0.52

Hope it helps answer the question:)

5 0
3 years ago
The solid block shown below has a mass of 146 grams. THE DIMENSIONS OF THE BLOCK ARE- 3.0 cm by 4.5 cm by 7.0 cm. What is the bl
Amiraneli [1.4K]

Explanation:

D=m÷v

D=146÷(3×4.5×7)

D=146÷94.5

D=1.54g/cm^3

5 0
3 years ago
What is<br>mole used for​
nordsb [41]

Answer:

What is mole used for?

Explanation:

The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions.

SI base units: Base unit (Dimensionless)

Symbol: mol  

Unit of: Amount of substance

Unit system: SI base unit

8 0
3 years ago
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