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Elanso [62]
3 years ago
14

Please help will give 30 points.

Chemistry
1 answer:
vredina [299]3 years ago
3 0

Answer:

Dependent variable: If calcium is given, then bone strength will increase.

Explanation:

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A cylinder with a moving piston expands from an initial volume of 0.350 L against an external pressure of 1.90 atm. The expansio
myrzilka [38]

Answer:

1.84 L

Explanation:

Using the equation for reversible work:

W = -P*(V_{2} - V_{1})

Where:

W is the work done (J) = -287 J.

Since the gas did work, therefore W is negative.

P is the pressure in atm = 1.90 atm.

However, work done is in joules and pressure is in atm. We can use the values of universal gas constant as a convenient conversion unit. R = 8.314 J/(mol*K);  R = 0.0821 (L*atm)/(mol*K)

Therefore, the conversion unit is 0.0821/8.314 = 0.00987 (L*atm)/J

V_{1} is the initial volume = 0.350 L

V_{2} is the final volume = ?

Thus:

(-287 J)*0.00987 (L*atm)/J = -1.9 atm*(V_{2} - 0.350) L

V_{2} = [(287*0.00987)+(1.9*0.350)]/1.9 = (2.833+0.665)/1.9 =1.84 L

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3 years ago
True or false. When an area within an atom is crowded with electrons it is known as a dipole "moment False True
Rama09 [41]

Answer:true

Explanation:

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2 years ago
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They all have the same choices but one of them its not gonna be used.​
Dima020 [189]

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Select the one that most likely has the highest rate of effusion Oxygen (O2) or hydrogen (H2):
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Orlov [11]

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6

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