1) Cathode rays are made up of negatively charged particles. 2)atoms contain negatively charged particles.3)Thomson's results led to the proposal of new atomic model the plum pudding model.

Explanation:

3 0

2 years ago

How many moles of water will be produced when 15.0 g of calcium chloride dihydrate are heated ?

Vanyuwa [196]

Answer:

0.204 mol

Explanation:

Step 1: Write the balanced equation for the heating of calcium chloride dihydrate

CaCl₂.2H₂O ⇒ CaCl₂ + 2H₂O

Step 2: Calculate the moles of calcium chloride dihydrate

The<em> molar mass of CaCl₂.2H₂O</em> is 147.01 g/mol. The moles corresponding to 15.0 g of CaCl₂.2H₂O are:

$15.0g \times \frac{1mol}{147.01g} = 0.102 mol$

Step 3: Establish the molar ratio of CaCl₂.2H₂O to H₂O

According to <em>the balanced equation</em>, the molar ratio of CaCl₂.2H₂O to H₂O is 1:2.

Step 4: Use the molar ratio to calculate the moles of water produced from 0.102 moles of calcium chloride dihydrate

$0.102molCaCl_2.2H_2O \times \frac{2molH_2O}{1molCaCl_2.2H_2O} = 0.204molH_2O$

4 0

2 years ago

How do the forces change when a friend helps you push a door

inysia [295]

The net force applied will increase.

8 0

2 years ago