A calorimeter was used to measure the heat change when an ionic compound dissolves in water. The final mass of the contents of the calorimeter was 50.54 g50.54 g and the change in temperature was 3.05 °C.3.05 °C. Calculate the heat change of the calorimeter contents, given that its specific heat is 4.14 J/(g⋅°C.)4.14 J/(g⋅°C.) q1=q1= JJ Calculate the heat change of the calorimeter, given that its heat capacity is 7.37 J/°C.7.37 J/°C. q2=q2= JJ Calculate the heat change of the solution process.

What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g

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.

What is the source of continuous heat and energy that we receive from the sun