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aleksklad [387]

4 years ago

7

a mass of gas under constant pressure occupies a volume of 0.5 m3 at a temperature of 20 degrees Celsius using the formula for c

ubic expansion, what will be the volume at a temperature of 45 degrees Celsius without a change in pressure?

1 answer:

Rzqust [24]4 years ago

3 0

The correct answer is 0.5457875.

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in a local fitness club 32% of the members lifted weights, 41% preferred aerobics and 6%preferred both.if a member is chosen at

castortr0y [4]

<span>Members lifted weights: W=32%
</span><span>Members preferred aerobics: A=41%
</span>Members preferred both: B=6%
Members lifted weights only: Wo=W-B=32%-6%→Wo=26%
Members preferred aerobics only: Ao=A-B=41%-6%→Ao=35%
F<span>ind the probability that the member prefers another method neither weights nor aerobics to exercise: N=?

N=100%-Wo-Ao-B
N=100%-26%-35%-6%
N=100%-67%
N=33%

Answer: T</span>he probability that the member prefers another method neither weights nor aerobics to exercise is 33%

3 0

3 years ago

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.

Kay [80]

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

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6 0

2 years ago

A sample of 15 workers in a certain city showed the following hourly wages in dollars) 140, 140, 125, 133, 135, 135, 140, 132, 1

nydimaria [60]

Answer:

The mean is the average of the given numbers. The median is the number in the middle of a set of given numbers and the mode is the value that appears most frequently.

The numbers must first be organized in ascending order.

120, 125, 125, 125, 130, 132, 133, 135, 135, 140, 140, 140, 140, 140, 150

In order to find the mean, all the given numbers must be added and divided by the amount of given numbers.

120+125+125+125+130+132+133+135+135+140+140+140+140+140+150=2010

2010/15=134

The mean is 134.

In order to find the median, eliminate numbers on each side until one number is remaining.

The median is 135.

In order to find mode, count each number and find the largest frequency of each.

The mode would be 140.

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3 years ago

Under Nazi rule, the university curriculum was changed to place the most emphasis on history. engineering. mathematics. philosop

ch4aika [34]

Answer:

history

Explanation:

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2 years ago

Combine the two ideas into a single sentence.

Arturiano [62]

The fourth one But I think

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3 years ago