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MrRissso [65]
4 years ago
11

Match these items with their examples.

Chemistry
2 answers:
postnew [5]4 years ago
8 0
Salt=compound, soda=liquid solution, aluminum foil=element, milk=colloid,
steel=solid solution
vaieri [72.5K]4 years ago
4 0

Answer:

liquid solution: soda

solid solution: stell.

compound: salt.

coloid: milk.

element: aluminum foil.

Explanation:

Solutions are homogeneous combination of two components, a solute (the one in lower proportion) and a solvent (the one in bigger proportion). Soda is solution composed by water (solvent) and carbonic acid (solute). Steel is a solid combination of Iron (solvent) and Carbon (solute).

A compound is a molecule composed by 2 or more different elements. Here, salt (NaCl) is composed by Sodium (Na) and Chlorine (Cl).

Coloids are systems, apparently homogeneous, but when you look deeper you can detect different phases. This is the case of milk which is a fluid with proteins and differents components constituting different phases.

Finally an element is a form of materia in which there is only one atom. Aluminum foil is an example of this.

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Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas fo
san4es73 [151]

Answer:

                    1.8 moles of O₂

Explanation:

                     The balance chemical equation for said double replacement (photosynthesis) reaction is as follow;

                           6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

According to balance chemical equation,

                 6 moles of O₂ are produced by  =  6 moles of CO₂

So,

                1.8 moles of O₂ will be produced by  =  X moles of O₂

Solving for X,

                     X =  1.8 mol × 6 mol / 6 mol

                     X =  1.8 moles of O₂

Stoichiometric problems in which moles are given and moles or other reactant or product asked are the simplest problems. One should only write the balanced chemical equation and perform above method to find the required moles.

8 0
3 years ago
WORTH 20 POINTS HELP PLEASE
Damm [24]

Answer:

The answers to your questions are below

Explanation:

Physical change is when matter changes its form but is still the same substance.

Chemical change is when matter changes its composition.

iron and oxygen from rust  It's a chemical change because iron and oxygen form a new compound different from the reactants.

iron is denser brightly when ignited . This is a chemical property because iron reacts with oxygen.

oil and water do not mix it's a physical change, oil and water are in touch but they do not react.

mercury melts at -39°C it's a physical property because mercury changes from solid to liquid but it still is mercury.

5 0
3 years ago
What type of radiation is emitted during a nuclear process in which a nucleas with a greater atomic number is formed?
neonofarm [45]

Answer:

<em>Neutron (¹₀n)</em>

Explanation:

<em>Nuclear Fission: </em>This is a process in which two or more light nuclei fuse or combine to form a heavier nucleus with a release of energy and radiation.

<em>Neutron: </em><em>A neutron is located in the nucleus of an atom, It has a neutral charge, The mass of neutron is 1.660540 x 10⁻²⁷ kg</em>

Therefore The type of radiation emitted during a nuclear process in which a nucleus with greater atomic number is formed is <em>Neutron (¹₀n)</em>

5 0
3 years ago
How much of strontium-90 will be left after 40 hours if you start with 960 grams and the half-life is 10 hours?
zmey [24]

Answer:

5 hours

Explanation:

7 0
2 years ago
Which practice is an unsustainable way of managing resources?
Sergeeva-Olga [200]

Explanation:

Unsustainable way of managing resources means using resources in an unjustifiable manner, using without keeping in the needs for future generations. That is disobeying the principles of sustainability.

For examples release of toxic industrial wastes in rivers and thus, polluting it. Or, Deforestation of land for agricultural or industrial purposes. Thus, reducing the oxygen carrying capacity of Earth.

7 0
3 years ago
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