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Ugo [173]
3 years ago
14

What is the most complete answer below about the information, found about the element uranium in the periodic table

Chemistry
1 answer:
jonny [76]3 years ago
6 0

Answer:

92 is that atomic number and 238.03 is the atomic mass number

Explanation:

The structure of the atom is given as:

                    ⁹²₂₃₈.₀₃U

The number 92 is the atomic number of the atom.

  The atomic number is the number of protons within an atom. This number defines the nature and type of atom that we have.

238.03 is the atomic mass number;

  The is the number of protons and neutrons within an atom. It is typically the mass of nucleus.

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Which group contains elements that are most likely to have similar properties
Alika [10]
I believe it's alkali metals and alkaline earth metals.
5 0
3 years ago
If the number of moles of a gas initially contained in a 2.10 l vessel is doubled, what is the final volume of the gas in liters
Anon25 [30]
Avagadro's law gives the relationship between volume of gas and number of moles of the gas. When the temperature and pressure are constant, volume is directly proportional to number of moles of gas.
\frac{V1}{n1} =  \frac{V2}{n2}
V -volume and n - number of moles of gas.
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation 
initial number of moles n1 - N
n2 - 2N as the number of moles are doubled 
V1 - initial volume - 2.10 L
V2 - final volume - V
substituting the values in the equation 
\frac{2.10L}{N}  \frac{V}{2N}
V = 4.20 L 
final volume is 4.20 L 
7 0
3 years ago
Which correctly lists the following in order of increasing entropy? i. 1 mol of HCl (g) at 50 ° C ii. 1 mol of NaCl (s) at 25 °
MaRussiya [10]

Answer:

ii. < iv. < i. < iii.

Explanation:

Hello,

At first, the entropy is lower in solid-phase systems since their particles are molecularly closer. Next, by knowing that the higher the temperature, the higher the entropy, the gaseous HCl at 25 ºC occupies the second place. After that, it is clear 2 moles of HCl have more entropy than just 1 since the larger the amount of mater the higher the entropy.

Best regards.

7 0
3 years ago
What is the boiling point elevation constant, Kb, of diethyl ether if 38.2 g of the nonelectrolyte benzophenone, C6H5COC6H5, dis
kakasveta [241]

Answer: the boiling point elevation constant is 1.73^0C/m

Explanation:

Elevation in boiling point is given by:

\Delta T_b=i\times K_b\times m

\Delta T_b=T_b-T_b^0= = Elevation in boling point

i= vant hoff factor = 1 (for non electrolyte)

K_b =boiling point constant = ?

m= molality

\Delta T_b=i\times K_b\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}

Weight of solvent (diethylether)= 330 g = 0.33 kg

Molar mass of solute (benzophenone)= 182 g/mol

Mass of solute (benzophenone) = 38.2 g

(35.7-34.6)^0C=1\times K_b\times \frac{38.2g}{182g/mol\times 0.33kg}

K_b=1.73^0C/m

Thus the boiling point elevation constant is 1.73^0C/m

3 0
3 years ago
I need help!!! the last two answers choices are
Cloud [144]

Answer:

D.atom 2 is not the same , because the mass number is different from atoms 1 and 2

7 0
3 years ago
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