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exis [7]
2 years ago
6

Question 25 of 33

Chemistry
1 answer:
Dafna11 [192]2 years ago
6 0

Answer:

A) It tends to increase from top to bottom of a group

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Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solution
Llana [10]

Answer:

The solution is always homogeneous mixture and transparent through which the light can travel. The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture while the sand can not dissolve in water and sand particles scatter the light.

Explanation:

Solution:

"The solution is always homogeneous mixture and transparent through which the light can travel"

The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture. The solubility of sugar is high as compared to the sand in water because the negative and positive ends of sucrose easily dissolve into the polar solvent i.e, water

Suspension:

"Suspension is the heterogeneous mixture, in which the solute particles settle down but does not dissolve"

The mixture of water and sand is suspension. The sand can not dissolve in water because it is mostly consist of quartz. The nonpolar covalent bonds of  sand are too strong and cannot be break by water molecules.

7 0
2 years ago
A sleeping 68 kg man has a metabolic power of 65 w . you may want to review ( pages 323 - 327) . part a how many calories does h
Kazeer [188]

<u>Given:</u>

Mass = 68 kg

Power = 65 W

<u>To determine:</u>

Calories burned during an 8.0 hr sleep

<u>Explanation:</u>

Energy is expressed as:

Energy = Power * Time

Now, the unit of power = Watt (W)

1 W = 1 J/s i.e. 65 W = 65 J/s

Time = 8 hrs = 8 * 3600 s = 28800 s

Energy = 65 J/s * 28800 s = 1872000 J

Convert Joules (J) to calories (cal)

1 cal = 4.184 J

The calculated energy = 187200 J * 1 cal/4.184 = 447418 cal

Ans: The man burns nearly 447.4 kcal during an 8 hr sleep




8 0
3 years ago
The comet cools down and begins to glow brightly as a result of this decreased temperature.
Alexus [3.1K]
True, in space the tail of a comet will be cold since it a. doesnt have a hot core and b. are typically not found near the sun
4 0
3 years ago
Antacids are used to relieve heartburn and sour stomach. Products like these commonly contain substances such as Mg(OH)2, Al(OH)
Leokris [45]

Answer:

They all react with acids.  

Explanation:

Thus, they decrease the concentration of stomach acid and provide heartburn relief.

The equations for the reactions are:

  1. Mg(OH)₂ + 2HCl ⟶ MgCl₂ + 2H₂O
  2. Al(OH)₃ + 3HCl ⟶ AlCl₃ + 3H₂O
  3. CaCO₃ +2HCl ⟶ CaCl₂ + H₂O + CO₂

6 0
3 years ago
On a warm summer day Mrs. camp placed some flowers in a zippered sandwich bag and sealed it with enough air to provide protectiv
Naddika [18.5K]
<span>The flowers undergo photosynthesis so it is expected to release O2. When you zip the flower in a plastic bag and placed it in the refrigerator, the plastic bag will shrink in size. The extra air plus the O2 in the back forms gaseous water. This gaseous water will slowly liquefy and when placed in the fridge, it will condense to form water solids.</span>
6 0
3 years ago
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