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Irina-Kira [14]
4 years ago
15

Elements are identified by their atomic number because

Chemistry
1 answer:
o-na [289]4 years ago
7 0
I think its Either B or C
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The answer is 196.96655 hope this helps
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Why do most mass numbers on the periodic table have a decimal?
Westkost [7]

Answer:

cause they big

Explanation:

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A submicroscopic particle suspended in a solution has a volume 1.3um^3. What is this volume in liters?
k0ka [10]
1000 liters = 1 m^3

and
1.3um^3 = 1.3x10^(-6)m^3

multiply both sides of the first equation by 1.3x10^(-6)
1.3x10^(-6) * 1000 liters = 1.3x10^(-6) * 1m^3
1.3x10^(-3) liters = 1.3x10^(-6) m^3
5 0
3 years ago
Read 2 more answers
1. Write the molecular equation, ionic equation, and net ionic equation for the reaction between calcium chloride and ammonium p
aalyn [17]

Answer:

(molecular) 3 CaCl₂(aq) + 2 (NH₄)₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) +  6 NH₄Cl(aq)

(ionic) 3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 NH₄⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄⁺(aq) + 6 Cl⁻(aq)

(net ionic) 3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)

Explanation:

The molecular equation includes al the species in the molecular form.

3 CaCl₂(aq) + 2 (NH₄)₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) +  6 NH₄Cl(aq)

The ionic equation includes all the ions (species that dissociate in water) and the species that do not dissociate in water.

3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 NH₄⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄⁺(aq) + 6 Cl⁻(aq)

The net ionic equation includes only the ions that participate in the reaction and the species that do not dissociate in water. In does not include <em>spectator ions</em>.

3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)

3 0
4 years ago
What is the volume of a cube with a length=3 cm width = 3 cm in height = 3 cm
marta [7]

Volume= Length * Width * Height

=3*3*3

=9*3

=27 cm^3

Answer : 27 cm^3

7 0
4 years ago
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