Convection currents can happen in liquids and gases. For example when air is heated it becomes less dense and rises. This means that cooler more dense air comes down and is also heated rising up above more cooler air etc. This creates a convection current.
Here is a diagram of a hot water tank heater:
(sorry it isn't that great I did it myself just now)
2/1.01=1.980=2
32.7/32.07=1.020=1
65.3/16.00=3.969=4
H2SO4. oxygen is 1
6.060 has 4 significant figures including the zero after the decimal and the zero between non-zeros. 60.6 has 3 significant figures while 606 has also 3 significant figures. 60600 has 3 significant figures. Thus, the number with the greatest number of significant figures is 6.060.
Answer:
14.45 mL
Explanation:
The rule apply for the addition and subtraction for significant digits is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
Initial Burette reading = 0.75 mL ( 2 significant digits)
Final Burette reading = 15.20 mL ( 4 significant digits)
Liquid dispensed = 15.20 mL - 0.75 mL = 14.45 mL ( Answer to two decimal places )
Answer:
a
The answer is shown on the first uploaded image
b
Explanation:
The explanation is shown on the second and third uploaded image