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alexgriva [62]
3 years ago
5

Help!! 15 Points! Science!

Chemistry
1 answer:
jeka57 [31]3 years ago
6 0
In order from the first question to the last:
A
C
B
C
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Give the symbols for metalloids
Elina [12.6K]

Answer:

The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.

Elements: Germanium; Boron; Arsenic

Explanation:

6 0
3 years ago
How much heat is required to warm 50.0 g of ice from -10.0oC to 0.00oC, melt the ice, warm the water from 0.00oC to 100.0oC, boi
ludmilkaskok [199]

The total heat required to convert the ice to steam is 155,000 J.

The given parameters:

  • <em>Mass of the ice, m = 50 g</em>
  • <em>Initial temperature of the ice, t = -10 ⁰C</em>
  • <em>Final temperature of the ice, T = 0⁰C, 100⁰C and 120⁰C</em>
  • <em>Specific heat capacity of water = 4.184 J/g⁰C</em>
  • <em>Heat of fusion of ice, = 333.55 J/g</em>
  • <em>Heat of vaporization, = 2,230 J/g</em>

<em />

The heat required to raise the temperature to 0⁰C is calculated as;

Q  = mc\Delta t\\\\Q_1 = 50 \times 4.184 \times (0 - (-10))\\\\Q_1 = 2092 \ J

The  heat required to melt the ice is calculated as follows;

Q_2 = mL_f\\\\Q_2 = 50 \times 333.55 \\\\Q_2 = 16,677.5 \ J

The heat raise the temperature to 100⁰C is calculated as;

Q_3 = 50 \times 4.184 \times (100 - 0)\\\\Q_3 = 20,920 \ J

The  heat required to boil the water is calculated as follows;

Q_4 = mL_v\\\\Q_4 = 50 \times 2230\\\\4_4 = 111,500 \ J

The heat raise the temperature to 120⁰C is calculated as;

Q_5 = 50 \times 4.184 \times (120 - 100)\\\\Q_5 = 4,184 \ J

The total heat required is calculated as follows;

Q_t = Q_1 + Q_2 + Q_3 + Q_4 + Q _5 \\\\Q_t  = 2092 + 16,677.5 + 20,920 + 111,500 + 4,184\\\\Q_t = 155,373.5 \ J\\\\Q_t \approx 155,000 \ J

Learn more about heat capacity here: brainly.com/question/16559442

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