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raketka [301]
3 years ago
15

A solid calcium metal reacts with molecular oxygen. WORD EQUATION = CHEMICAL EQUATION =

Chemistry
1 answer:
Ne4ueva [31]3 years ago
5 0
Word equation - calcium + oxygen -> calcium oxide
Chemical equation - Ca + O2 -> CaO2

Hope this helps!
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17. An industrially important element contains
likoan [24]

Answer:

Iron (Fe)

Explanation:

The number of electrons (-) is usually the same as the number of protons (+) in the atom of the element (unless it is an ion).

The element described has 26 electrons, so we can assume that it has 26 protons as well. The number of protons in an atom is the atomic number of element that the atom is.

Element 26 on the PTE is Iron (Fe), which does rust (oxidation) in air and water.

8 0
3 years ago
Ice has a density of 0.92g/cm3. It will float in water.
SVEN [57.7K]

The density of pure water is 1 g/cm^3.

Its density is 0.98 g cm 3 at room temperature, in comparison with the handiest zero.92 g cm 3 for ice, a reality that has to be defined through atomic, and molecular concepts. If ice has been no longer much less dense than water, it might sink, having a devastating impact on lake backside ecosystems. believe it or now not, ice is honestly about 9% much less dense than water. for the reason that water is heavier, it displaces the lighter ice, causing the ice to glide to the pinnacle.

The density of ice is about 90 percent that of water, but that could range because ice can contain air, too. meaning that about 10 percent of an ice cube or iceberg will be above the water line. The density of water is maximum at four∘C, and the density of the ice is much less than the water due to its susceptible intermolecular pressure of attraction. as the density of water is more, it's miles heavier than ice. therefore ice floats on the floor of the water. Ice continually floats due to the fact it's far less dense than everyday water. because frozen water molecules shape a crystal.

Learn more about A density here:-brainly.com/question/17780219

#SPJ9

6 0
1 year ago
Earth is approximately 149,600,000 kilometers away from the sun. How would this distance be expressed in scientific notation?
Ronch [10]

Answer:

bo

Explanation:

I dont know nothing cuz am that smart and yes am cool wait I have to wait 67 seconds am not done answering you questions I will be back in a few....

7 0
3 years ago
What stops gravity from pulling water to the center of the earth
Alona [7]

Magnetism, or more specifically electromagnetic repulsion

4 0
3 years ago
Read 2 more answers
2KClO3 2KCl + 3O2
FinnZ [79.3K]
True, because most chemical reactions have more moles but not really.
Also that they decompose better. "not really"
4 0
3 years ago
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