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wolverine [178]
3 years ago
15

How many atoms are in .00 × 10-10 g Au

Chemistry
1 answer:
Shtirlitz [24]3 years ago
6 0
Atomic mass Au = 196.96 u.m.a

196.96 g ----------- 6.02x10²³ atoms
0.00x10⁻¹⁰ g -------  ( atoms ? )

( 0.00 x10⁻¹⁰) x 6.02x10²³ / 196.96

0 / 196.96

= 0 atoms

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zysi [14]
What is the problem u need help with
3 0
2 years ago
Write a balanced net ionic equation to show why the solubility of Cu(OH)2(s) increases in the presence of a strong acid and calc
Helga [31]

Answer:

2.2×10^8

Explanation:

Cu(OH)2(s)<---------> Cu^2+(aq) + 2OH^-(aq) Ksp=2.2 x 10 ^-20

2H3O^+(aq) + 2OH^-(aq) <-------> 4H2O(l). Kw= 1×10^14

Cu^2+(aq) + 4H2O(l) <--------> [Cu(H2O)4]^2+(aq)

Overall ionic reaction:

Cu(OH)2(s) +2H3O^+(aq) <---------> [Cu(H20)4]^2+(aq)

Equilibrium constant for the reaction: Ksp×Kw= 2.2 x 10 ^-20 × (1/(1×10^-14))^2

Keq= 2.2×10^8

Kw= ion dissociation constant of water

3 0
2 years ago
7.The following symbol is used to represent the particles in what type of radiation?Select one:a. Alphab. Betac. Gammad. Neutron
laiz [17]

Explanation:

The emission of a beta particle is the result of the rearrangement of the unstable nucleus of the radioactive atom in order to acquire stability. For that, a phenomenon occurs in the nucleus, in which a neutron decomposes giving rise to three new particles: a proton, an electron (β particle), and a neutrino. The antineutrino and electron are emitted. The proton, however, remains in the nucleus.

The symbol is used to represent beta particles.

Answer: b. Beta

5 0
1 year ago
What is a direct combination reaction?
Leona [35]
It is one of the most common types of chemical reactions and can also be called a synthesis reaction. In this reaction, two or more chemical species combine to form a more complex product.
4 0
2 years ago
Read 2 more answers
Which element forms an ionic compound when it reacts with lithium?
Dennis_Churaev [7]
D. Br

Hope this helps!
4 0
3 years ago
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