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irga5000 [103]
2 years ago
6

How much heat is absorbed when 2.8 mol nh4no3 is dissolved in water? the heat of solution of nh4no3 is 25.4 kj/mol.

SAT
1 answer:
Kay [80]2 years ago
6 0

The heat absorbed when 2.8 mol NH₄NO₃  is dissolved in water is 71.96 kJ.

<h3>What is heat?</h3>

Heat is the transportation of energy to or from a thermodynamic system.

By the formula of heat

\rm (n) \times (delta\;Hrxn) = (qrxn)

Where n = moles

Delta Hrxn is molar heat

q = heat

Putting the values in the equation

\rm qrxn = (2.8 mol) \times(25.7 kJ/mol) = 71.96 kJ

Thus, the heat absorbed when 2.8 mol NH₄NO₃  is dissolved in water is 71.96 kJ.

Learn more about heat

brainly.com/question/1429452

#SPJ1

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Jerimiah is studying Wave A and Wave B. Wave A is traveling at 3 hertz, and Wave B is traveling at 1.2 hertz.
Inga [223]

The prediction about the waves if they were to crash into each other is that The resulting wave would travel at 4.2 hertz.

<h3>What is the wave about?</h3>

Note that:

Constructive interference of the waves is one that leads to an increase in amplitude or frequency of any kind of waves.

Hence:

F' = 3 Hz + 1.2 Hz

= 4.2 Hz

Destructive interference of the waves is one that lowers the amplitude or frequency of waves and as such:

F' = 3 Hz - 1.2Hz = 1.8 Hz

The prediction about the waves if they were to crash into each other is that The resulting wave would travel at 4.2 hertz.

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3 years ago
A machine is used to fill bags with a popular brand of trail mix.
lorasvet [3.4K]

The least weight of a bag in the top 5 percent of the distribution is; 246

From the complete question below, we are given;

Population mean; μ = 240

Population standard deviation; σ = 3

Z-score formula is;

z = (x' - μ)/σ

  • Now, we want to find the least weight in the top 5 of the distribution and as such we will use;

1 - 0.05/2 = 0.025 as significance level

Z-score at significance level of 0.025 is 1.96

Thus;

1.96 = (x' - 240)/3

3 × 1.96 = x' - 240

x' = 240 + 5.88

x' = 245.88

Approximating to a whole number gives;

x' = 246

Complete question is;

A machine is used to fill bags with a popular brand of trail mix. The machine is calibrated so the distribution of the weights of the bags of trail mix is normal, with mean 240 grams and standard deviation 3 grams. Of the following, which is the least weight of a bag in the top 5 percent of the distribution?

Read more about z-score at; brainly.com/question/25638875

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After the end of world war ii, nations met at the _______ to create a new worldwide economic system.
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