The metric system is the oldest name for the international system of units. SI unit or the international systems of units are based on seven basic units; the meter, kilogram, second, ampere, Kelvin, candela and mole. All of these basic units are divided into multiples by a power of ten. For example in meters, 1 meter is equal to: 1000 millimeter, 100 centimeter, 10 decimeter, 0.1 decameter, 0.01 hectometer, 0.001 kilometer and so on and so forth.
The answer is that the substance loses or gains heat.
Answer:
The heat of the substance changes.
Explanation:
Substances can be made to change phases by fluctuating the temperature, the pressure, or both.
Which half-reaction represents the reduction that occurs?(I ) Al ==> Al3+ + 3e-
(2) Al3+ + 3e- ==>Al
(3) Cu ==> Cu2+ + 2e-
(4) Cu2+ + 2e- ==>Cu
A. AgCrO4(s) + Na2NO3(aq)
B. Ag2CrO4(s) + NaNO3(aq)
C. Ag(CrO4)2(s) + Na2NO3(aq)
D. Ag(CrO4)3(s) + Na(NO3)2(aq)
The products obtained when 2 AgNO₃ + Na₂CrO₄ reacts is Ag₂CrO₄ + 2 NaNO₃.
The reaction in which reduction and oxidation takes place simultaneously
by obtaining or losing an electron, the oxidation number of a molecule, atom, or ion varies.
In the question it is given that
AgNO₃(aq) + Na₂CrO₄(aq) → and we have to predict the products
So Silver Nitrate when reacts with Chromic Acid to from silver Chromate and sodium nitrate.
2 AgNO₃ + Na₂CrO₄ → Ag₂CrO₄ + 2 NaNO₃
Therefore Product B is the correct answer.
To know more about Redox Reaction
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