Answer:
Thomson made the following conclusions: The cathode ray is composed of negatively-charged particles. The particles must exist as part of the atom, since the mass of each particle is only ∼ 20001start fraction, 1, divided by, 2000, end fraction the mass of a hydrogen atom.
Explanation:
The time taken for the water fountain to dispense 842.75 mL of water is 20.625 seconds
<h3 /><h3>What is time?</h3>
Time can be defined as the measure of past, present or future events.
To calculate the time taken to dispense 842.75 mL of water, we use the formula below.
Formula:
- F = V/t................ Equation 1
Where:
- F = Average flow rate of the fountain
- V = Volume of the water
- t = time.
Make t the subject of the equation.
- t = V/F................ Equation 2
From the question,
Given:
- F = 0.64 gallons per minutes
- V = 842.75 mL = (842.75/1000)/(3.78541) gal = 0.22 gal.
Substitute these values into equation 2
- t = 0.22/0.64
- t = 0.34375 minutes.
- t = (0.34375×60) = 20.625 seconds.
Hence, The time taken for the water fountain to dispense 842.75 mL of water, is 20.625 seconds.
Learn more about time here: brainly.com/question/13893070
Answer:
0.0433 M
Explanation:
Water is added to 25.0 mL of a 0.866 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution
the final solution is (25/500) X 0.866 M =0.0433 M
Se2- has 34 protons and 36 electrons so it gets a 2- charge.