Answer: The empirical formula is 
.
Explanation:
So, the mass of each element is given:
Mass of Se = 1.443 g
Mass of O = 0.5848 g
Step 1 : convert given masses into moles.
Moles of Se=
Moles of O = 
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Se = 
For O =
The ratio of Se: O = 1: 2
Hence the empirical formula is .
Wave speed = frequency * wavelength
Wave speed = 1.80 * 0.30
Wave speed = 0.54 m/s
The conductor rotates through a magnetic field to provide
<span>88 and 84 are mass numbers
the mass number of an element is the sum of the number of protons and the number of neutrons (in which they are each equal to 1 unit (amu))
the number of protons is always the same for a given element (e.g. any C atom has 6 protons), but the number of neutrons varies. Two atoms of the same element (number of protons) with a different number of neutrons are called "isotopes".
So the two strontium atoms differ by 4 neutrons. 84Sr has four neutrons less than 88Sr</span>
Answer:
1. False
Balanced forces would mean all forces acting upon an object would be equal. So there is no movement.
2. True
Unbalanced forces would mean there is a force acting upon a side of tge object, causing it to move in a direction.
