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lys-0071 [83]
3 years ago
15

3. What is the electron configuration of the following elements?

Chemistry
1 answer:
ki77a [65]3 years ago
5 0

Answer: Lithium ( 3),Calcium (20),Copper (29),Strontium (38),Potassium (19),Sodium (11)

Explanation:

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Which sample would show stronger (intermolecular) attractive forces, the cold water or the hot water?
erik [133]

Answer:

Cold water

Explanation:

A simple way to solve this kind of problems is to keep in mind that:

<em>Solids have stronger intermolecular attractive forces than liquids, and liquids have stronger forces than gases.</em>

Cold water behaves more similarly to solids than hot water. Conversely, hot water behaves more similarly to gases than cold water. Thus, cold water has stronger intermolecular attractive forces than hot water.

6 0
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What is known about a reaction with a positive enthalpy?
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"Endothermic reaction: In an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings of the reaction."

Explanation:

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3 years ago
An 84.84 g sample of steel is added to a 100-ml graduated cylinder with 45.0 ml of water. if the resulting water level is 55.5 m
Elden [556K]
The volume of the steel that is described above is obtained by water displacement method. This means that the volume can be calculated by subtracting the initial volume from the final volume. This will give us an answer of,
                             volume of steel = 55.5 mL - 45 mL = 10.5 mL

6 0
3 years ago
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If a chemist analyzes a 3.84g sample containing sand and table sugar, and recovers 1.43g of      sand, what  percent by mass of
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We are given with a mixture of sand and table sugar. The mixture has a mas s of 3.84 grams. After recovery, it was found out that there is 1.43 grams of sand. The amount of table sugar then is 3.84-1.43 or 2.41 grams. This is equal to 2.41/3.84 or 62.76% by mass/
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What is the polymer used in making car rear lights?
Nimfa-mama [501]

D. Polyacrylonitrite

hope i help my bad if i'm wrong

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