If a object started moving have did it’s velocity change?

Chemistry

1 answer:

Otrada [13]4 years ago

3 0

Answer:

the velocity did change

Explanation:

velocity is the rate of change of its position with respect to a frame of reference.

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Calculate the expansion work done on the system when exactly 1 mol of solid ammonium chloride, nh4cl, decomposes completely to y

maria [59]

The expansion work on an irreversible system is equal to:

W = - PV

Assuming that the gas is ideal, therefore:

PV = nRT

[P=pressure, V=volume, n=number of moles, R=gas constant, T=absolute temperature]

Therefore,

W = -nRT

W = -(1 mol) * (8.314 J / mol K) * (1250 K)

W = -10,392.50 J

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Nuclear Fission and Nuclear Fusion

Free_Kalibri [48]

Answer:

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3 years ago

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If 35.50 cm3 of a NaOH solution are required for the complete neutralization of a 25.00cm3 sample of 0.200mol dm-3 H2SO4, what i

Morgarella [4.7K]

In this question, you are given the NaOH volume but asked for concentration.
Don't forget that for every 1 mol of NaOH there will be 1 mol OH- ion, but for every 1 mol of H2SO4 there will be 2 mol of H- ion.
To neutralize you need the same amount of OH- and H+, so the equation should be:

OH-= H+
35.50cm3 * x*1= 25cm3* 0.2mol/dm3 *2
x= 10/35.5 mol/dm3= 0.2816/dm3

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3 years ago

In a undisturbed layer, how do we know which layer was deposited first ?

OLEGan [10]

Answer:

It's the bottom layer.

Explanation:

Scientists use the Law of Superposition to determine the relative age of a layer of sedimentary rock:

The oldest rock layer is at the bottom of an undisturbed bed.

Thus, Layer A in the figure below was deposited first.