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Anarel [89]
2 years ago
6

Which of the following would be the best representation of input energy and then

Chemistry
1 answer:
Rom4ik [11]2 years ago
4 0
A is the correct answer
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Identify each of the highlighted materials as an element, a compound, or a mixture, and explain your reasoning.
Reika [66]

Answer:

These are compounds.

Explanation:

As it is formed by chemically bonding of two elements C ( carbon) and H (hydrogen) .

  1. Its not a mixture because mixture is Just dispersed of diferrent elements or a compound which are not in fix ratio
4 0
2 years ago
A galvanic cell at a temperature of is powered by the following redox reaction: 2Cr3 + 3Ca Suppose the cell is prepared with in
stira [4]

Answer:

2.13 V

Explanation:

The balanced equation of the reaction his;

2Cr^3+(aq) + 3Ca(s) -----> 2Cr(s) + 3Ca^2+(aq)

Since this is a galvanic cell then E°cell must be positive. It implies that calcium will be the anode and chromium will be the cathode since calcium is ahead of chromium in the electrochemical series.

E°anode= -2.87 V

E°cathode= -0.74 V

E°cell= E°cathode -E°anode

E°cell= -0.74 -(-2.87)

E°cell = 2.13 V

8 0
2 years ago
Some compounds are better known by their common names than by their systematic chemical names. Give the chemical formulas of the
kondaur [170]

Explanation:

(a) Dry ice is solid carbon dioxide and its chemical formula is solid CO_{2}.

(b) Sodium chloride is commonly known as salt in daily life. Hence, chemical formula of salt is NaCl.

(c) Laughing gas is also known as dinitrogen monoxide. Hence, its chemical formula is N_{2}O.

(d) Marble (chalk limestone) is chemically known as calcium carbonate. Hence, its chemical formula is CaCO_{3}.

(e) Baking soda is chemically known as sodium bicarbonate. Hence, its chemical formula is NaHCO_{3}.

(f) Ammonia has a chemical formula as NH_{3}.

(g) Water has a chemical formula as H_{2}O.

(h) Milk of magnesia is a base and it is chemically known as magnesium hydroxide. Its chemical formula is Mg(OH)_{2}.

(i) Epsom salt is most often found as heptahydrate of sulfate mineral epsomite. Its chemical formula is usually MgSO_{4}.7H_{2}O. If not present as a heptahydrate then its chemical formula is MgSO_{4}.(H_{2}O)_{x}where, value of x can be equal to 0 to 7.

5 0
3 years ago
Anatom that has lewer neutrons than protons and more electrons than protons is
Ludmilka [50]

Answer:

a negative ion, and an isotope.

Explanation:

The perfect atom consists of an equal balance in all 3. If the neutrons are not even with the protons, it is an isotope since it is like another version of the so called (but not actually) 'perfect' atom. If there is more electrons, the charge is negative, making it an ion.

8 0
3 years ago
Can someone help please !!
garik1379 [7]
It is B, I believe. Sorry if I am wrong! Hope I helped! ^_^
8 0
3 years ago
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