Answer:
Crystal structure; brittleness
Step-by-step explanation:
The image illustrates the crystal structure of an ionic solid.
This structure affects the brittleness of the solid.
If you strike a sharp blow to the crystal with a hammer, the crystal layers will slide past each other.
The ions with the same charge will repel each other, and the crystal will fly apart.
Answer:
d.A substance with a density of less than 1.00 g/mL.
Explanation:
The density of water, or of any fluid in which you immerse yourself, is directly proportional to the upward force that this fluid will exert on you. That is, the denser the water, the more you can float on it. This is the principle of Archimedes, with his famous Eureka.
In relation to the buoyancy of bodies, it does not depend only on the density of water, or fluid. Buoyancy also depends on the weight / volume of the body being submerged. In this case we are going to focus on the density of water / fluid.
In the case of water in conditions of temperature at 25 ° C the density is usually 1 g / ml so that any object that has a density less than it can float in it.
Answer: 
Explanation:
To calculate the initial temperature of the water:
where,
q = heat absorbed = 
= specific heat of water = 
m = mass of water = 2230 g
= final temperature of water = 
= initial temperature of metal = ?
Now put all the given values in the above formula, we get:
Thus, the initial temperature of the water is
Answer:
Q = 111.8 kJ;
The reaction is endothermic.
Explanation:
The heat of the mixture can be calculated by the equation:
Q = m*c*ΔT
Where Q is the heat, m is the mass of the solution, c is the specific heat, and ΔT is the variation in the temperature (fina - initial).
The mass of H₂SO₄ is the volume multiplied by its density:
mH₂SO₄ = 2000 mL * 1.030 g/mL = 2060 g
Then the total mass is:
m = 2060 + 200
m = 2260 g
Q = 2260*4.184*(36.820 - 25.000)
Q = 111,468.03 J
Q = 111.8 kJ
The reaction is endothermic because the solution is absorbing heat (Q > 0), which can be noticed by the increase in the temperature. When the reaction loses heat, it is exothermic and the temperature decreases.
