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Anna35 [415]
3 years ago
5

50 POINTS!!! Based on your observations in the virtual lab, fill in the data table below.

Chemistry
1 answer:
stiks02 [169]3 years ago
4 0

Hi Khal75,

Experiment: How to seperate iron fillings

Iron fillings is a substance that attracts to magnets.

Answer - Separated using a magnet; magnetism

If you move a magnet around different solids with the iron fillings in it, it wil attract the iron to be able to seperate it.

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Which statement is true of a reversible reaction at equilibrium?'
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At Equilibrium, The rate of formation of Products is equal to the rate of degradation of Reactants.

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3 years ago
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A sample of iron absorbs 81.0 J of heat, upon which the temperature of the sample increases from 19.7 Celsius to 28.2 Celsius. I
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Explanation:

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6 0
3 years ago
Solution (A) contains 0.01 M of NH4Cl; solution
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Answer:

NH4Cl, NaCl, Ba(OH)2, NaOH

Explanation:

NH4Cl is an acidic salt formed by the neutralization of a strong acid (HCl) with a weak base (NH3). Hence, it will habe a PH<7 (the lowest PH).

NaCl is a neutral salt,formed by neutralization of a strong acid (HCl) with a strong base (NaOH). Hence, it will have a PH of 7.

Ba(OH)2 is a weak base. Therefore, it will have a PH between 8 and 10.

NaOh meanwhile, is a strong base. Therefore, it will have a PH between 10 to 13.

Hence, we have

NH4Cl < NaCl < Ba(OH)2 < NaOH

5 0
3 years ago
All of the statements about nuclear reactions are true except nuclear reactions involve changes in the nucleus of an atom. a nuc
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Answer:

the rate of a nuclear reaction is increased by the addition of a catalyst.

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Catalysts are substances that increase the speed of ordinary chemical reactions. Ordinary chemical reactions involve electrons. But a nuclear reaction involves only the nucleus. Hence catalysts cannot increase the rate of a nuclear reaction.

The chemical state of the atom depends on the electrons of the atom. Hence a nuclear reaction is unaffected by the chemical state of the atoms involved.

Isotopes have different mass number. So the nucleus is different. Hence nuclear reactions of the same element vary according to which isotope is involved.

In nuclear reactions energy release is given by E= mc ^{2} where c is the speed of light. Hence energy changes in nuclear reactions are much greater than in ordinary chemical reactions.

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