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Arte-miy333 [17]
3 years ago
5

Here is a word equation for a chemical reaction.

Chemistry
1 answer:
soldier1979 [14.2K]3 years ago
4 0

Explanation:

From the word equation, it shows that when copper oxide reacts with sulphuric acid, a double replacement reaction will occur, where copper and sulphate forms a bond with each other, and so do water.

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What are the sources of petrochemicals
Sindrei [870]

Answer:

Petrochemicals are chemical products derived from petroleum, although many of the same chemical compounds are also obtained from other fossil fuels such as coal and natural gas or from renewable sources such as corn, sugar cane, and other types of biomass.

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3 years ago
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Suppose you have a scientific question you are interested in answering. What would you normally do before you make your hypothes
STatiana [176]

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A. Do some background research

There are 5 steps for the scientific method while doing an experiment

Step 1: make a question

Step 2: research that question

Step 3: Hypothesis

Step 4: Test and collect data

Step 5: Conclusion

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Which of the following situations demonstrates balanced force
yuradex [85]

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i think i had the same question as you, I put "A car driving on a straight freeway at 60 miles per hour" which was correct for me.

Explanation:

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3 years ago
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A 20 kg curling stone is sliding in a positive direction at 4 m/s. A second curling stone is sliding at the same speed but in th
solniwko [45]

Answer:

The kinetic energy of the two stones is 320 J

Explanation:

Kinetic energy is the energy that a body possesses due to its movement. So it is the capacity or work that allows an object to go from being at rest, or still, to moving at a certain speed.

In other words, the kinetic energy of an object is that which is produced due to its motion and depends on its mass and velocity as follows:

Ec=\frac{1}{2} *m*v^{2}

where the kinetic energy Ec is measured in joules (J), the mass m is measured in kilograms (kg) and the velocity v in meters/second (m/s).

In this case you know that a 20 kg curling stone is sliding in a positive direction at 4 m/s. So:

  • m= 20 kg
  • v= 4 m/s

Replacing you have:

Ec_{1} =\frac{1}{2} *20 kg*(4\frac{m}{s}) ^{2}

Ec₁= 160 J

A second curling stone slides at the same speed but in the opposite direction. So:

  • m= 20 kg
  • v= - 4 m/s

Replacing you have:

Ec_{2} =\frac{1}{2} *20 kg*(-4\frac{m}{s}) ^{2}

Ec₂= 160 J

The kinetic energy of the two stones is calculated as:

Ec= Ec₁ + Ec₂

Ec= 160 J + 160 J

Ec= 320 J

<u><em>The kinetic energy of the two stones is 320 J</em></u>

7 0
3 years ago
How much heat energy is produced by 0.5 Wh of electrical energy
n200080 [17]
1 W is equivalent to 1 J/s

So,
0.5 Wh = 0.5 (J/s) (h)

Converting h to s,
0.5 (J/s) (h) (60min/1h) (60s/1min) = 1800J

Thefore,
0.5Wh is 1800J or 1.8kJ of heat energy

6 0
3 years ago
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