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vodka [1.7K]
4 years ago
12

The alkali metals are those in the leftmost column on the periodic table.

Chemistry
1 answer:
weeeeeb [17]4 years ago
8 0
<span>The answer is Gaseous metals</span>
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Nitrogen (N) is element number 7 in the periodic table. It has a mass number of 14. Nitrogen
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The answer is ISOTOPE
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If adequate o2 is present in the mitochondria, pyruvic acid will be converted to ______; if conditions are anaerobic, pyruvic ac
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What problems do flooding and extreme weather cause?
mafiozo [28]

Answer:

Explanation:

Sometimes weather is extreme, causing destruction and death. Too much rain can cause flooding. Too much hot weather for long periods of time without any rain can cause drought. Huge storms with strong winds, such as hurricanes and tornadoes, can do a great amount of damage to buildings and crops.

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4 0
3 years ago
Read 2 more answers
Please Help I need an explanation on how to do this
nydimaria [60]

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\\ \rm\Rrightarrow Cl_2+2NaOH\longrightarrow NaCl+NaClO_3+H_2O

Remember that it's a ionic equation not general equation

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5 0
2 years ago
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What is the change in internal energy for each of the following situations? 1. q-7.9 J out of the system and w 3.6 J done on the
adoni [48]

Answer:

A i. Internal energy ΔU = -4.3 J ii. Internal energy ΔU = -6.0 J B. The second system is lower in energy.

Explanation:

A. We know that the internal energy,ΔU = q + w where q = quantity of heat and w = work done on system.

1. In the above q = -7.9 J (the negative indicating heat loss by the system). w = 3.6 J (It is positive because work is done on the system). So, the internal energy for this system is ΔU₁ = q + w = -7.9J + 3.6J = -4.3 J

ii. From the question q = +1.5 J (the positive indicating heat into the system). w = -7.5 J (It is negative because work is done by the system). So, the internal energy for this system is ΔU₂ = q + w = +1.5J + (-7.5J) = +1.5J - 7.5J = - 6.0J

B. We know that ΔU = U₂ - U₁ where U₁ and U₂ are the initial and final internal energies of the system. Since for the systems above, the initial internal energies U₁ are the same, then we say U₁ = U. Let U₁ and U₂ now represent the final energies of both systems in A i and A ii above. So, we write ΔU₁ = U₁ - U and ΔU₂ = U₂ - U where ΔU₁ and ΔU₂ are the internal energy changes in A i and A ii respectively. Now from ΔU₁ = U₁ - U, U₁ = ΔU₁ + U and U₂ = ΔU₂ + U. Subtracting both equations U₁ - U₂ = ΔU₁ - ΔU₂

= -4.3J -(-6.0 J)= 1.7 J. Since U₁ - U₂ > 0 , U₂ < U₁ , so the second system's internal energy increase less and is lower in energy and is more stable.

8 0
3 years ago
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