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3 years ago

Relative dating methods help scientists to _____.

Chemistry

2 answers:

klasskru [66]3 years ago

8 0

<span>identify the order in which rock units formed</span>

gogolik [260]3 years ago

6 0

identify the order in which they formed

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In the Lewis structure for a molecule, one of the nitrogen atoms shares six electrons with a carbon atom and has two electrons t

lutik1710 [3]

Answer: option D. triple bond and one lone pair

Explanation:

3 0

3 years ago

Solve the following problem and round the correct number of significant

RUDIKE [14]

Answer:

4.5 + 2.34 = 6.8

Sig Figs:

Decimals:

Scientific Notation:

6.8 × 10ⁿ

Words:

six point eight

5 0

3 years ago

What happens to the temperatures when we have direct sunlight vs indirect sunlight?

lawyer [7]

Explanation:

When we have direct sunlight, the temperature is higher compared to indirect sunlight.

Direct sunlight is usually overhead whereas indirect sunlight is at an angle to the surface.

Direct sunlight impacts the surface with more energy concentrated on a smaller surface area.
This warms the surface more.
Indirect sunlight is diffuse and spreads over a wider area.
This leads to a reduction in temperature.

7 0

3 years ago

If an electron fell to a lower orbit or energy level, energy would be

arsen [322]

It would emit energy in most of the cases in form of light

5 0

4 years ago

Read 2 more answers

It has been suggested that the surface melting of ice plays a role in enabling speed skaters to achieve peak performance. Carry

vesna_86 [32]

Explanation:

Relation between pressure, latent heat of fusion, and change in volume is as follows.

$\frac{dP}{dT} = \frac{L}{T \times \Delta V}$

Also, $\frac{L}{T} = \Delta S^{fusion}_{m}$

where, $\Delta V^{fusion}_{m}$ is the difference in specific volumes.

Hence, $\frac{dP}{dT} = \frac{\Delta S^{fusion}_{m}}{\Delta V^{fusion}_{m}}$

As, $\Delta S^{fusion}_{m} = \frac{L}{T} = \frac{6010}{273.15}$ = 22.0 J/mol K

And, $\Delta V^{fusion}_{m} = \frac{M}{d_{H_{2}O}} - \frac{M}{d_{ice}}$ ...... (1)

where, $d_{H_{2}O}$ = density of water

$d_{ice}$ = density of ice

M = molar mass of water = $18.02 \times 10^{-3} kg$

Therefore, using formula in equation (1) we will calculate the volume of fusion as follows.

$\Delta V^{fusion}_{m} = \frac{M}{d_{H_{2}O}} - \frac{M}{d_{ice}}$

= $\frac{18.02 \times 10^{-3}}{997} - \frac{18.02 \times 10^{-3}}{920}$

= $-1.51 \times 10^{-6}$

Therefore, calculate the required pressure as follows.

$\frac{dP}{dT} = \frac{22}{-1.51 \times 10^{-6}}$

= $1.45 \times 10^{7} Pa/K$

or, = 145 bar/K

Hence, for change of 1 degree pressure the decrease is 145 bar and for 4.7 degree change dP = $145 \times 4.7 bar$

= 681.5 bar

Thus, we can conclude that pressure should be increased by 681.5 bar to cause 4.7 degree change in melting point.

5 0

3 years ago