CHEMISTRY HIGH SCHOOL

What happens at a hot spot?

Answers

Answer 1
Answer: hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. As oceanic volcanoes move away from the hot spot, they cool and subside, producing older islands, atolls, and seamounts. As continental volcanoes move away from the hot spot, they cool, subside, and become extinct.
Answer 2
Answer: Mantle plumes are areas of hot, upwelling mantle.A hot spot develops above the plume.Magma generated by the hot spot rises through the rigid plates of the litosphere and produces active volcanoes at the earths surface

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Which of the following is equivalent to 3.2 mg?a
3.2 x 10-15 ug
b 3.2 x 1015 ug
С
3.2 x 10-3 ug
d
3.2 x 10'ug

Answers

Answer:

The options are not really clear, however, the answer is 3.2 × 10^3ug

Explanation:

Milligram (mg) and microgram (ug) are interconvertible measurements of mass or weight. One microgram (ug) is a millionth gram while one milligram (mg) is a thousandth gram.

Hence, one milligram is a thousandth microgram i.e. 1 mg = 1000 ug

Therefore, a measurement of 3.2mg in ug will be; 3.2 × 1000

= 3200

= 3.2 × 10^3 ug

Hence, an equivalent measurement of 3.2mg is 3.2 × 10^3ug.

The equivalent of 3.2 mg is 3.2 x 10^-3 ug. Therefore, the correct answer is option c.

3.2 mg stands for 3.2 milligrams.

The prefix "milli-" means one-thousandth (1/1000), so 1 milligram (mg) is equal to 0.001 grams (g).

To convert milligrams (mg) to micrograms (ug), we use the following conversion factor:

1 mg = 1000 ug

So, for 3.2 mg:

3.2 mg * 1000 ug/mg = 3200 ug

Now, to express this in scientific notation, we can write it as:

3200 ug = 3.2 x 10^3 ug

So, the correct equivalent of 3.2 mg is indeed:

c) 3.2 x 10^-3 ug

therefore, The correct answer is option c.

Learn more about Unit Conversion here:

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Which compound is a member of the same homologous series as C3H8?(1) CH4 (3) C5H8
(2) C4H8 (4) C6H10

Answers

The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.

What is a homologous series?

The term homologous  series refers to a family of molecules. The molecules in this family have the same functional group and differ from each other by -CH2-group.

The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.

Learn more about homologous series:brainly.com/question/14953274

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CH4 is the compound of a member of the same homologous series as C3H8.

What does the molecular formula of a compound describe?

Answers

Answer: Molecular Formulas. Molecular formulas are a compact chemical notation that describe the type and number of atoms in a single molecule of a compound. Identify the molecular formula of a compound given either its name or structural formula.

Explanation:

Why does an egg sink in fresh water but float in salt water??

Answers

If an object is less dense than the water around it, it will float. Because salt water is denser than freshwater, some things float more easily in the ocean—or extremely salty bodies of the water, such as the Dead Sea. You can make your own dense water by adding salt to tap water.

The element mercury was first discovered on the Sun.
a. True
b. False

Answers

This statement is FALSE. Mercury was not first discovered in the sun. In fact, mercury or quicksilver was discovered by ancient Indians and Chinese even before 2000 BC. Its ores that are called cinnabar are used in traditional Chinese medicines. However, the effectiveness is not yet justified because of the toxicity of the element. Mercury is also used with thermometers both in clinical and lab uses. Nowadays, the use of it in thermometers is gradually disappearing because of its harmful properties.  

Based on bond type, which compound has thehighest melting point?
(1) CH3OH (3) CaCl2
(2) C6H14 (4) CCl4

Answers

Based on bond type, CaCI2 has the highest melting point.
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