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Reil [10]
4 years ago
12

Which of the following chemical symbols represents the element sodium?

Chemistry
1 answer:
lina2011 [118]4 years ago
4 0
Chemical symbols on the periodic table represent an element. 

Answer: D. Na
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What are deltaTb and deltaTf for an aqueous solution that is 1.5g nacl in 0.250kg h2o? Given Kb=0.51 C/m and kr=1.86 C/m
bulgar [2K]

Answer:

T_f for given question is 2.79 and T_b is 0.52

\Delta T_b = I \times K_b \times m {i- vant hoff’s constant ; Kb- constant ; m molarity }

M = no. of moles of the solute present in one kg of solution

Let the weight of amount of solute be “w” and its molecular mass be “M”

Let the mass of the solvent in the given question be “x”

\Delta T_b = I \times K_b \times (w/M)/ x

\Delta T_b = I \times K_b \times w/Mx

\Delta T_b = 1 \times 0.51 \times1.5/(0.250 \times 58.44) = 0.052

\Delta T_f = M \times K_f = 1.86 \times 1.5 = 2.79

4 0
3 years ago
Complete the chart. (Remember to enter a 0 if necessary.)
Trava [24]
<span>Atomic Number 10 is Neon.

1s: 2
2s: 2
2p: 6 
3s: 0 
3p: 0 
4s: 0
3d: 0
4p: 0 
5s: 0</span>
6 0
3 years ago
9. You have a mini bottle of pure maple syrup. The full container has a mass of 137
cupoosta [38]

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A

Explanation:EDGE

7 0
3 years ago
True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former du
Westkost [7]

Answer:

FALSE                            

Explanation:

The incident of Muese Valley occured in 1930 due to air pollution.

Muese Valley lies along the river Muese which is situated Huy and Liege, Belgium. This region was crowded with industries including steel manufacturers, glass manufacturers, explosives plants, zinc smelter, etc.

The increase number of industries and population lead to the sources of pollution. Also increase in burning of domestic coal increased pollution surrounding the area.

Air pollution became so severe at this region that people have severe  respiratory problems. Residents suffered from vomiting, retrosternal pain, coughing fits and several experienced nausea. There were fog and smog all over and many people died.

Hence the answer is FALSE.

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3 years ago
What numbers are considered significant?
AleksAgata [21]

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6/5/8/9

Explanation:

5 0
3 years ago
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