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andrew11 [14]
4 years ago
5

At what speed does all electromagnetic radiation travel?

Chemistry
1 answer:
Mkey [24]4 years ago
5 0
3.0
10 to the power of 8

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Write an equation to solve for the mass of oxygen. mass of ? = mass of ? = mass of ?
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Explanation:

we know that number of moles=mass(in grams)/molar mass

for the mass of oxygen the equation becomes

mass=number of moles*molar mass

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A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree
Anuta_ua [19.1K]

Answer:

309.1K

Explanation:

Step 1: Convert the flown heat to Joule

We will use the relationship 1 kJ = 1,000 J.

69.0kJ \times \frac{1,000J}{1kJ} = 69.0 \times 10^{3} J

Step 2: Convert the mass of water to gram

We will use the relationship 1 kg = 1,000 g.

8.10 kg \times \frac{1,000g}{1kg} = 8.10 \times 10^{3} g

Step 3: Convert the initial temperature to Kelvin

We will use the following expression.

K = °C + 273.15 = 33.9°C + 273.15 = 307.1 K

Step 4: Calculate the final temperature

We will use the following expression.

Q = c \times m \times (T_f - T_i)

where,

  • Q: heat
  • c: specific heat capacity
  • m: mass
  • T f: final temperature
  • T i: initial temperature

T_f = \frac{Q}{c \times m} + T_i = \frac{69.0 \times 10^{3}J }{4.18J/g.K \times 8.10 \times 10^{3}g} + 307.1K = 309.1K

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Give the number of protons, electrons and neutrons in one atom of Carbon.
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6 protons, 6 neutrons, and 6 electrons.

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