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sveta [45]
2 years ago
14

Which statements about a sodium atom (22/11 Na ), are correct?

Chemistry
1 answer:
inysia [295]2 years ago
3 0

Answer:D


Explanation:
Number of electrons=Number of protons
Sodium atom has 1 valence electron
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Which of these has the most covalent character? <br> NaF <br> Caf2 <br> Bef2 <br> CsF <br> SrF2
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Bef2 is the compound that has the most covalent character. Whichever element has the greatest electronegativity has the least difference and most covalent character. 
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3 years ago
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What must be changed, temperature or heat energy, during condensation explain in 2-3 sentences
Nastasia [14]

Answer:

Change occur in heat energy.

Explanation:

Change occur in the heat energy of molecules during condensation process. The molecules of gas releases its heat energy and converted into liquid state. With this heat energy, they are active and escape from each other but when the heat energy is removed from them, the attractive forces between these gas molecules are formed which convert them into liquid state so change in heat energy occur in the condensation process.

4 0
3 years ago
If the measured gas pressure in a collection flask during a gas-forming reaction was determined to be 1.44 atm? If the measured
ryzh [129]
With the information given most likely in order to find the partial pressure of the gas produced you have to subtract the total air pressure in the collection flask by the atmospheric pressure since you assume that the flask started with atmospheric pressure when it was sealed and then the gas was added as the reaction took place increasing the pressure.
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6 0
3 years ago
14. In groups, students create dioramas to depict different ecosystems and their physical characteristics. One of the dioramas i
Lena [83]
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3 0
3 years ago
Suppose there is 0.63 g of HNO3 per 100 mL of a particular solution. What is the concentration of the HNO3 solution in moles per
Vadim26 [7]

Answer:

There are 0.09996826 moles per liter of the solution.

Explanation:

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Convert mL to L and place under moles (mol/L)

100mL=0.1 L

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3 years ago
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