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Leya [2.2K]
3 years ago
15

Compounds are pure substances. What other substances are considered pure substances?

Chemistry
1 answer:
dimaraw [331]3 years ago
6 0

Answer:

um... hydrogen gas

gold metal

sugar (sucrose)

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Select all that apply. The stability of atomic nuclei is related to the _____. ratio of protons to electrons ratio of neutrons t
Marat540 [252]
The stability of atomic nuclei relies on the forces within the atom that balance out the charge. The electrons have the power to make an atom negatively or positively charged, but neutrons allow the atom to be electrically neutral regardless. The gravitational pull of protons and neutrons in the atomic nuclei keeps the electrons in an orbit, and with less protons than neutrons, electrons will be pulled into the nuclei and make the atom unstable; with less neutrons than protons, the electrons will be repelled and make the atom unstable. Therefore, the number and ratio of protons to neutrons are the factors that make an atom stable.

Answer: ratio of neutrons to protons and number of protons and neutrons

Hope this helps!
6 0
4 years ago
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In the Northern Hemisphere, recall that atmospheric CO2 levels are highest in early spring and lowest during early fall. What ac
asambeis [7]

Answer:

Photosynthesis

Explanation:

Photosynthesis can be defined as the process whereby plants, some protistans, and some bacteria utilize the energy from sunlight to produce glucose from water and carbon dioxide. In early spring, there is the shift of plants from scanty winter branches to abundant spring leaves. When the leaves on the trees reduced in the fall, dead plants break down throughout the winter due to the activities of microbes. The microbes decompose the plant materials and generate carbon dioxide. This leads to increase in the level of carbon dioxide in the atmosphere. In the spring, leaves return to the plants/trees and the rate of photosynthesis increases greatly. This consumes more carbon dioxide and the level of carbon dioxide in the atmosphere reduced.

4 0
3 years ago
Summary of the periodic table
JulsSmile [24]
The periodic table to chart which arranges all of the unknown elements to the automatic numbers the columns in the periodic table are called families or groups the rows are called periods
4 0
3 years ago
Suppose that H2SO4 was used in the reaction instead of HCl. How many moles of NaOH would neutralize 1 mole of H2SO4?
arlik [135]

Answer: Hence, 2 moles of NaOH would neutralize 1 mole of H_2SO_4

Explanation:

HCl+NaOH\rightarrow NaCl+H_2O

One mole of hydrochloric acid neutralizes one mole of sodium hydroxide to give one mole of sodium chloride and one mole of water

When sulfuric acid is used in the place of HCl , 1 mole of sulfuric acid will neutralizes the 2 mole of sodium hydroxide and gives one mole of sodium sulfate and 2 moles of water. As we can see from the reaction:

H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O

Hence, 2 moles of NaOH would neutralize 1 mole of H_2SO_4

5 0
3 years ago
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Which of the following will dissolve the fastest
dimulka [17.4K]

Answer:

<em>Saturated.</em>

Explanation:

<u>This explains the solute dissolving faster. It links with the definition of soaked with moisture; drenched. </u>

7 0
3 years ago
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