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wel
3 years ago
13

Why might a scientist repeat an experiment if she did not make a mistake in the first one? A) Scientists who repeat experiments

make the most money. B) It helps ensure the results are consistent and repeatable. C) Repeating ensures the expected results match the hypothesis. D) It helps find portions that can be skipped with the same results.
Chemistry
1 answer:
9966 [12]3 years ago
3 0

Answer:

The correct answer is B) it helps to ensure the result are consistent and repeatable.

Explanation:

Scientist generally repeat an experiment if he or she did not make a mistake in the first one to compare the results of two experiment, if there is no difference in the result or values obtainted from the observation of two experiment. he or she become sure that experiment was done in a right way because if there is some error made when experiment was carried out then the result of two same experiment would be different.

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An ionic compound has a highly negative ΔH soln in water. Would you expect it to be very soluble or nearly insoluble in water? E
valina [46]

The ionic compound will be soluble in water.

Ions are present in ionic compounds, which are held together by the attraction interactions between the ions with opposing charges. One of the most well-known ionic compounds is table salt or sodium chloride. Molecular compounds are made up of separate molecules that are connected by sharing electrons (covalent bonding).

High melting points are found in ionic substances. ionic compounds are brittle and rigid. When an ionic chemical is dissolved in water, it separates into ions. Ionic compound solutions and melting forms of these substances carry electricity, while solid materials do not.

A substance's heat of solution value is one of the criteria that determine whether or not it will dissolve. The Ionic compound will dissolve in water because a negative heat of the solution indicates that the reaction will be spontaneous.

To know more about Ionic compound refer to:  brainly.com/question/9167977

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8 0
2 years ago
What is the iupac name of: ​
exis [7]

Explanation:

saturated hydrocarbon

7 0
3 years ago
When cobalt chloride is added to pure water, the co2 ions hydrate?
mrs_skeptik [129]
Answer : The question is incomplete and the complete question is attached in the answer;

Answer 1) When HCl was added to the system of cobalt chloride it will eventually produce more Cl ions in the solutions which will shift the equilibrium to the right and make the solution look more blue than before. To accommodate extra Cl ions in the system the equilibrium gets shifted. 

Answer 2) When in the reaction system water is added the Cobalt chloride compound forms a hydrated mixture; this means the equilibrium reaction shifts to the left and produces more hydrated ions along with more chlorine ions in the solution.

Which then turns the resultant solution tinto pink in colour.

3 0
3 years ago
Read 2 more answers
Which type of stress force produces reverse faults?
Mashcka [7]
The answer you are looking for is compression.
5 0
3 years ago
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How many grams of acetylene are produced by adding 3 moles of cac2
jolli1 [7]

Answer:

78.12g of acetylene

Explanation:

Acetylene and calcium hydroxide are produced when H₂O reacts with CaC₂. The reaction is:

2 H₂O + CaC₂ → C₂H₂ + Ca(OH)₂

<em>Where 1 mole of C₂H₂ (acetylene) is produced per mole of CaC₂</em>

Thus, the addition of 3 moles of CaC₂ produces 3 moles of acetylene.

As molecular mass of acetylene is 26.04g/mol, grams of acetylene produced are:

3mol C₂H₂ × (26.04g / mol) = <em>78.12g of acetylene</em>

8 0
3 years ago
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