What is a star good explanation

Chemistry

1 answer:

Natasha2012 [34]3 years ago

5 0

Answer:

A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements. The Sun is the closest star to Earth.

Explanation:

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Does the temperature of the thermometer show the melting, freezing, or boiling point of water

soldier1979 [14.2K]

Answer:

Depending on the thermometer, it may have the ability to go as high or low as melting, freezing or boiling point for water. Just make sure you know the boiling, melting and freezing points in Celsius, Fahrenheit and/or Kelvin and read your thermometer accordingly.

Explanation:

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3 years ago

Structure of 2,3-dimethylheptane

olga55 [171]

Answer:

Please find the structure of the hydrocarbon in the attachment section and details on how to draw it in the explanation section.

Explanation:

Heptane is a member of the alkane group, which has a general formula of CnH2n+2. If n in heptane is 7, this means that the chemical formula for heptane will be C7H16 i.e.

= C7H2(7) + 2

= C7H14+2

= C7H16

C7H16 is the chemical formula for heptane, which is a linear hydrocarbon with 7 carbon atoms and 16 hydrogen atoms. However, in the name of the hydrocarbon compound given in the question: 2,3-dimethylheptane;

- Two methyl groups (CH3) has a substituted two hydrogen atoms specifically at carbon 2 and 3 respectively. Therefore, the new chemical formula of 2,3-dimethylheptane will be: C7H14(CH3)2

Please find the structural formula of the compound; 2,3-dimethylheptane as an attachment.

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3 years ago

Compared to other minerals, a mineral that is ranked higher on the moh’s scale will be:

skad [1K]

The choices here are:
 a. harder c. more dense b. shinier d. more reactive

The answer is "harder".
The Moh's Scale is also known as the Mohs scale of mineral hardness. This scale is basin gon the ability of one certain material to visibly scratch another material. 1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Feldspar 7 Quartz 8 Topaz 9 Corundum 10 Diamond.

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3 years ago

What determines what the size of the mineral will be?

Charra [1.4K]

Answer: Density and the elements that it composes.

Explanation: The elements that form the mineral and the size of atoms of these minerals is what ultimately matters in the determination of the size the mineral will be.

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3 years ago

Read 2 more answers

Convert 54.3 g into mg

Vinil7 [7]

The answer to your question is 54300

8 0

4 years ago