Answer:
The correct answer is rough, white tents
Explanation:
The options that have black tents are wrong because black materials absorbs heat, hence cannot protect the family from the heat from the sun during the reunion.
Also light/heat energy easily penetrate smooth surfaces as against rough surfaces. From this explanation, rough, white tents are better for the reunion as they will protect the family from the heat radiated from the sun.
Answer:
238,485 Joules
Explanation:
The amount of energy required is a summation of heat of fusion, capacity and vaporization.
Q = mLf + mC∆T + mLv = m(Lf + C∆T + Lv)
m (mass of water) = 75 g
Lf (specific latent heat of fusion of water) = 336 J/g
C (specific heat capacity of water) = 4.2 J/g°C
∆T = T2 - T1 = 119 - (-20) = 119+20 = 139°C
Lv (specific latent heat of vaporization of water) = 2,260 J/g
Q = 75(336 + 4.2×139 + 2260) = 75(336 + 583.8 + 2260) = 75(3179.8) = 238,485 J
Answer:
Chloride (Cl⁻) and sodium (Na⁺) ions.
Explanation:
Hello,
In this case, since the aqueous species are actually dissociated when reacting and the solid species (ferric carbonate) remains undissolved, we can modify the given reaction as follows:
In such a way, dissociating the aqueous species we obtain:
It means that the net ionic equation is:
Therefore, the spectator ions are those were cancelled out, chloride (Cl⁻) and sodium (Na⁺).
Best regards.
Answer:
The fraction of the molecule's mass that comes from the element's mass.
Explanation:
A kilogram is a unit of mass. A meter is a unit of measurement, a Liter is volume and a kelvin is temperature