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Evgen [1.6K]
3 years ago
9

Of the​ rock's original​ uranium-235 remains. how old is the​ rock

Chemistry
1 answer:
Gemiola [76]3 years ago
5 0
2.1 billion years
2,139,000,000 to be exact
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Which organisms are producers in a temperate coniferous forest? (Select all that apply.)
Tju [1.3M]

Answer:Coniferous trees, like pine, spruce, and fir, are the main producers in the forest. Their pine needles fall to the forest floor, creating a spongy mat for other life to inhabit. Low lying shrubs and moss are other producers in this ecosystem. Producers in the coniferous forest.

Explanation:

4 0
3 years ago
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What are some of the problems with using flame tests as a way to identify substances?
ASHA 777 [7]
Different substances can produce similar results in color. This can cause <span>uncertainty with identifying the substance.</span>
3 0
3 years ago
A glass tube contains mercury. What would be the height of the column of mercury which would create pressure equal to 1.00 atm
Murrr4er [49]

Since 1.00 atm is equal to 760 mmHg, the height of the column of mercury which would create pressure equal to 1.00 atm is 760 mm or 76 cm

<h3>What are the units of pressure?</h3>

Pressure is defined as the force acting perpendicularly per unit area of a surface.

The units of pressure include;

  • millimetres of mercury, mmHg
  • aatmospheres, atm,
  • pascals, Pa
  • Newtons per square metre, N/m^2

1 atmosphere is equal to 760 mmHg.

Therefore, the height of the column of mercury which would create pressure equal to 1.00 atm is 760 mm or 76 cm

Learn more about pressure at: brainly.com/question/25934121

7 0
3 years ago
Write a balanced half-reaction for the reduction of permanganate ion (Mno) to manganese ion Mn?) in acidic aqueous solution. Be
Luden [163]

Explanation:

Permanganate is general name for the chemical compound which containes manganate (VII) ion. Permanganate(VII) ion is strong oxidizing agent as  manganese is in +7 oxidation state and can be easily reduced and oxidize others.

The balanced half reaction for reduction of the permanganate ion, MnO_4^- to manganese ion, Mn^{2+} is shown below:

MnO_4^-_{(aq)}+8H^+_{(aq)}+5e^-\rightarrow Mn^{2+}_{(aq)}+4H_2O_{(l)}

6 0
3 years ago
Thermal energy added to a substance that is not changing state causes the substance’s temperature to
tatyana61 [14]

Answer:

increase

Explanation:

Conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction. Conductors include metal, steel, aluminum, copper, frying pan, pot, spoon etc.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

Hence, thermal energy added to a substance that is not changing state causes the substance’s temperature to increase because it would absorb energy in the form of heat.

6 0
3 years ago
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