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ASHA 777 [7]
3 years ago
6

Why does an ionic compound conduct an electric current when the compound is melted but not when it is in the solid state?

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
6 0
When in solid state the charged particles (ions) are NOT free to move but when in melted the ions are free to move.

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Which statements correctly describe the decay rates of radioactive isotopes?
storchak [24]

Answer: b} The exact time when an individual atom will decay can be accurately predicted.

c} After each half-life, the amount of radioactive material is reduced by half.

Explanation:

All radioactive decay  follows first order kinetics.

Rate law expression for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = time taken for decay process

a = initial amount of the reactant

a - x = amount left after decay process

Expression for calculating half life, which is the time taken by the half of the reactants to decompose is:

t_{1/2}=\frac{0.693}{k}


4 0
3 years ago
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A small sack of sand has a density of 1.5 g/cm3 and a mass of 1500 g. How much space (volume) does the sand occupy?
d1i1m1o1n [39]
The answer would be 1000 cm3
8 0
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Which set contains no ionic species?
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The awnser should be A
7 0
3 years ago
The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i
julsineya [31]

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

5 0
3 years ago
What happens to carbon atoms during photosynthesis?
ANEK [815]
<span>during photosynthesis the co2 is converted into sugar
</span><span> 6 carbon compound that immediately splits into 2 molecules of 3-phosphoglycerate. 

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</span>hope it helps
3 0
3 years ago
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