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sesenic [268]
3 years ago
6

Balance the equation below and use it to answer this question:

Chemistry
1 answer:
Svet_ta [14]3 years ago
8 0

Answer:

2H2 + O2 -----> 2H2O

Not sure about the second question though.

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If you place rice on top or a speaker, what will happen to the rice when you turn the speaker on?
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Answer:

The rice will move

Explanation:

the sound vibration and waves will cause the rice to move

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100 points! Report on an element
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What does a metal's position in an activity series indicate about the chemical properties of that particular metal?
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The closer to the top the metal is in the list, the more active the metal is and the stronger a reducing agent the metal is. When two different metals are involved in a redox reaction, the metal higher in the list will be oxidized and give up electrons that will reduce the cation of the less active metal.
3 0
3 years ago
1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at
dlinn [17]

Answer:

187.34 atm

Explanation:

From the question,

PV = nRT.................. Equation 1

Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.

make P the subject of the equation

P = nRT/V.............. Equation 2

n = mass(m)/molar mass(m')

n = m/m'............... Equation 3

Substitute equation 3 into equation 2

P = (m/m')RT/V............ Equation 4

Given: m = 46 g, T = 25°C = (25+273) = 298 K, V = 3.00 L

Constant: m' = 2 g/mol, R = 0.082 atmL/K.mol

Substitute these values into equation 4

P = (46/2)(0.082×298)/3

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P = 187.34 atm

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3 years ago
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