Answer:
(A & B) ; (F , H & D)
Explanation:
Each row in a periodic table represents elements with same energy levels. Here A & B both are in a same row. Similarly , F , H & D are also in same row. This signifies that they have same energy levels.
Answer:
Explanation:
mass = 400 grams * [1 kg/1000 grams] = 0.400 kg
c = 387 Joules / (oC * kg)
Δt = 55 - 30 = 25 oC
E = m*c * Δt
E = 0.4 * 387 * 25
E = 3870 Joules
Answer:
float
Explanation:
density= mass/ volume (kg/m^3)
1.59 kg/0.197 m^3
=8.07 kg/m^3
density of H2O= 1000 kg/m3
since density(block)<density(H2O), the block will float
(can also be done in g/cm^3)
1590 g/ (1.97*10^5 cm3)= 0.00807 g/cm^3 < 1 g/cm^3 (h2O)
Answer:
The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products
Explanation: