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Keith_Richards [23]
3 years ago
13

Which element in group 15 is the strongest metallic character?

Chemistry
1 answer:
pashok25 [27]3 years ago
8 0

Answer:

Bismuth (Bi)

Explanation:

Elements of the group 15 are nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb) and bismuth (Bi).

In the periodic table, metallic character increases down the group.

On the basis of metallic character, group 15 elements are arranged in the ascending order as follows:

N < P < As < Sb < Bi

Nitrogen and phosphorous are non-metal.

Arsenic and bismuth are metalloid.

Being last in the group, Bi is a metal and hence has strongest metallic character.

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Choose the thermochemical equation that best illustrates ΔH°f (enthalpy of formations) for Li2SO4. A) 2 Li+(aq) + SO42-(aq) → Li
klasskru [66]

Answer:

(c) Li2SO4(aq) → 2Li+(aq) + SO4 2-(aq)

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3 years ago
In which compound is the percent by mass of oxygen greatest?
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Explanation:

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percent by mass of oxygen in MgO=\frac{16g}{40.30g/mol}\times 100=39.70\%

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3 years ago
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What factor is most responsible for the fact that water is a liquid rather than a gas at room temperature?
ivann1987 [24]
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4 years ago
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Calculate the heat in joules "Q" needed to raise 27.0 g of water from 10.0 °C to 90.0 °C.​
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Answer:

9028.8 J

Explanation:

The equation for working out the amount of thermal energy required is q = m c Δ T , where q is the amount of energy, m is the mass being heated up in grams, c is the specific heat capacity of what you're heating up in joules per gram per kelvin, and Δ T is the change in temperature in Kelvin.(Change in temperature will always give the same value,no matter Celsius or Kelvin)

mass = 27g, assuming specific heat capacity of water is 4.18 J/g*K, and the change in temperature is 90-10(=80)  , the energy needed to raise : 80 × 27 × 4.18 = 9028.8 J

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3 years ago
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Newton's second law of motion: behavior of objects for and all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object  is increased, the acceleration of the object is decreased.

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