How much heat must be added to heat 0.750 g of water from 20.0°C to 40.0°C? (Remember, Q=C * m *ΔT) The specific heat of water is 4.186 joule/gram. Question 4 options: A) 322 kJ B) 126 kJ C) 62.8 J D) 62.8 kJ

Afamily is one another name for a group on the table of elements.

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity