Answers
Because it is buoyant, helium floats because its molecules are lighter than those of our atmosphere's nitrogen and oxygen and so they rise above it.
Briefing:The helium balloon moves some air around (just like the empty bottle displaces an amount of water). The balloon will float in the air as long as the combined weight of the helium and balloon fabric is less than the air it replaces. Helium is actually much lighter than air, as it turns out.
Where does helium come from?Two electrons, two protons, and typically two neutrons make up the element helium. It is an inert gas that has no color or smell. Fusion and fission both produce helium as a product. Helium was initially found in the sun's spectrogram in 1868.
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Related Questions
Directions: Provide the chemical name of the given chemical formula.
Chemical Formula
1. Zn(ClO₂)2
2. Mn3N4
3. Na₂SO4
4. CO(NO3)3
5. K(MnO4)
6. N₂Ss
7. P406
8. HCIO(aq)
9. H₂SO3(aq)
10. H3P(aq)
Answers
The names of each of the compounds as shown in the question above;
1. [tex]Zn(ClO_{2} )_{2}[/tex] - Zinc II hypochlorite
2. [tex]Mn_{3} N_{4}[/tex] - Manganese IV nitride
3. [tex]Na_{2} SO_{4}[/tex] - Sodium sulfate
4. [tex]CO(NO_{3} )_{3}[/tex] - Cobalt III nitrate
5. [tex]K(MnO_{4} )[/tex] - Potassium permanganate
6. N₂S - Sodium sulfide
7. [tex]P_{4} O_{6}[/tex] - phosphorus trioxide (dimer)
8. HCIO(aq) - hypochlorous acid
9. [tex]H_{2} SO_{3}[/tex](aq) - Sulfurous acid
10. [tex]H_{3} P[/tex](aq) - phosphine
What is a chemical name?We know that in the field of chemistry, the name of a compound is decided by the International Union of Pure and applied Chemistry. This organization gives the general rules that pertain to the naming of chemical compounds. The name of a compound is derived from the elements that are contained in the compound. Sometimes, the oxidation state of the central atom in the compound is an important part of the naming of the compound.
Let us now write the names of each of the compounds as shown in the question above;
1. [tex]Zn(ClO_{2} )_{2}[/tex] - Zinc II hypochlorite
2. [tex]Mn_{3} N_{4}[/tex] - Manganese IV nitride
3. [tex]Na_{2} SO_{4}[/tex] - Sodium sulfate
4. [tex]CO(NO_{3} )_{3}[/tex] - Cobalt III nitrate
5. [tex]K(MnO_{4} )[/tex] - Potassium permanganate
6. N₂S - Sodium sulfide
7. [tex]P_{4} O_{6}[/tex] - phosphorus trioxide (dimer)
8. HCIO(aq) - hypochlorous acid
9. [tex]H_{2} SO_{3}[/tex](aq) - Sulfurous acid
10. [tex]H_{3} P[/tex](aq) - phosphine
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In your opinion, is a food web or a food chain a more accurate representation of how
energy and matter flow in an ecosystem? Explain.
Pls help I will give brainless
Answers
Answer: food webs
Explanation: they are more realistic because they show that the producers are usually eaten by many different consumers and most consumers are eaten by more than one predator. A food web is the natural interconnection of food chains and is generally a graphical representation of what-eats-what in an ecological community.
the density of lead is 11.342 g/ml. what would be the volume of a 25.00 g sample of this metal?
Answers
The volume of the lead is 2.2 mL
What is density?The term density refers to the ratio of the mass to the volume of a body. We know that from the question, the following are the parameters that we have been given;
Density of lead = 11.342 g/ml
Mass of lead = 25.00 g
Volume of lead = ??
We can write that;
Density = mass/volume
Volume = mass/Density
Volume = 25.00 g/ 11.342 g/ml
= 2.2 mL
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