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.
Answer: C) 
L 
Explanation: 
According to Avogadro's law, 1 mole of every gas occupies 22.4 Liters at STP.
Thus from the balanced chemical equation, 8 moles of hydrogen sulfide reacts with 8 moles of chlorine gas.
i.e 8 moles of hydrogen sulfide reacts with 
of chlorine gas.
2.28 moles of hydrogen sulfide reacts with 
of chlorine gas.
A material will change from one state or phase to another at specific combinations of temperature and surrounding pressure. Typically, the pressure is atmospheric pressure, so temperature is the determining factor to the change in state in those cases.
Names such as boiling and freezing are given to the various changes in states of matter. The temperature of a material will increase until it reaches the point where the change takes place. It will stay at that temperature until that change is completed.
In order to determine the mass of a substance given the volume, we require the density. The density of iron is 7.87 grams/cm³
Now,
Density = mass / volume
Mass = density * volume
Mass = 7.87 * 4.6
36.2 grams of iron are present in the cube
Answer:
The answer is
<h2>250 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume of object = 25 mL
Density = 10 g/mL
The mass of the object is
mass = 25 × 10
We have the final answer as
<h3>250 g</h3>
Hope this helps you
