Answer:
Permeable.
Explanation:
Most sediments of a chalky quality are permeable.
Answer:It will go on until the concentrations will meet. Blood cells are composed mainly of water, it will make up the proportion of about 90% of water for whole body. ... Because of the difference in osmotic potential caused by the salt water solution, water will diffuse out of the red blood cells causing them to shrink in size.
Explanation:
Answer:
0.504 M
Explanation:
Step 1: Write the balanced neutralization reaction
2 KOH + H₂SO₄ ⇒ K₂SO₄ + 2 H₂O
Step 2: Calculate the reacting moles of KOH
55.2 mL (0.0552 L) of 0.500 M KOH react. The reacting moles of KOH are:
0.0552 L × 0.500 mol/L = 0.0276 mol
Step 3: Calculate the moles of H₂SO₄ that reacted with 0.0276 moles of KOH
The molar ratio of KOH to H₂SO₄ is 2:1. The reacting moles of H₂SO₄ are 1/2 × 0.0276 mol = 0.0138 mol
Step 4: Calculate the concentration of H₂SO₄
0.0138 moles of H₂SO₄ are in 27.4 mL (0.0274 L). The molarity of H₂SO₄ is:
[H₂SO₄] = 0.0138 mol/0.0274 L = 0.504 M
Answer:
Each magnet should have been tested on many different magnetizable materials
Explanation:
In designing an experiment such as that outlined above, the experimental design should have included many different magnetizable materials.
All the types of magnets; the horseshoe, the bar, and the ring magnet should have been tested using many different magnetizable materials apart from the metal object. By so doing, the strongest magnet can be effectively determined without bias because it will attract the greatest number of magnetizable materials.
Again, the shape of the magnet affects its ability to attract objects. Hence, different shapes of magnets can not effectively be compared for relative magnetic strength.
Answer: The correct option is A.
Explanation: Chemical reaction is defined as the reaction when there is a formation of new substance. Indicators that help in determining the chemical reaction are:
- Change in Temperature
- Appearance or disappearance of color
- Formation of bubbles
- Formation of a precipitate
- Characteristic odor
Option A: As seen from the image, there is a color change happening in the event. So, it can be considered as a chemical reaction.
Option B: In Event 1, release of heat and light is not visible. Hence, this is not the indicator for detection of chemical reaction.
Option C: In Event 2, we cannot judge the dropping of temperature just by seeing the image. Hence, this cannot be considered as a chemical reaction.
Option D: In this, the color is not mixed throughout the liquid, which means they are not reacting and hence, is not the indicator for chemical reaction.
Therefore, option A is the correct answer.