Answer:
The answer is Zn(NO3)2 + 2NaOH => Zn(OH)2 + 2NaNO3.
Explanation:
Zinc is less reactive than Sodium so it will be displaced from NO3- and Sodium will replace Zinc's position.
31, 31, 40. An atom of _31^71Ga has 31 electrons, 31 protons, and
40 neutrons.
The atomic number is 31, so the atom has<em> </em>31 protons (+).
If the atom is neutral, it must contain 31 electrons (-).
Mass number = protons + neutrons or
A = p + n
71 = 31 + n
n = 71- 31 = 40 neutrons
Answer:
For a substance to classify as a mineral, it must lie within certain parameters. It should be an inorganic solid, that is naturally occurring in nature (not synthesized), with an ordered internal structure and a definite chemical composition.
By definite chemical composition, geologists mean that the mineral must be have chemical constituents that have an unvarying chemical composition, or a chemical composition that oscillates withing a very limited and specific range.
An example is the mineral, halite. It has a chemical composition of one sodium atom and one chloride atom, represented as NaCl and is unchanging in this composition throughout nature.
<h3>Hope this helps</h3>
Answer:
The answer to your question is: 28°C
Explanation:
Data
mass = 10 g
T1 = 23°C
T2 = ?
Q = 209 joules
Formula
Q = mC(T2 - T1)
T2 = Q/mC + T1
T2 = 209/(10 x 4.182) + 23
T2 = 4.99 + 23
T2 = 27.99 ≈ 28°C
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