Magnesium dichloride or Magnesium chloride
Answer:
In 2 moles of copper, there are 319.2172 grams.
Explanation:
Quick conversion chart of moles Copper(II) Sulfate to grams 1 moles Copper(II) Sulfate to grams = 159.6086 grams 2 moles Copper(II) Sulfate to grams = 319.2172 grams
Answer:
2H2O2 → O2 + 2H2O
Explanation:
<u>2H2O2</u>
H : 2x2= 4
O : 2x2=4
<u>O2 + 2H2O</u>
H : 2x2=4
O : 2+2=4
First, be sure to count all of H and O atoms on each side of the chemical equation. Once you know how many of each type of atom you have you can only change the coefficients (the numbers in front of atoms or compounds) in order to balance the equation.
Cathode rays are a stream of electrons that are negatively charged particles. The particles move towards the anode or positively charged electrode as the posses negative charge. Electric current is the rate of flow of the charge.
Sound waves are D) Mechanical and Longitudinal
Explanation:
In physics, waves are classified into two types:
- Mechanical waves are those waves that need a medium to propagate - these waves are produced by the vibrations of the particles of the medium
- Electromagnetic waves are produced by the alternating vibrations of electric and magnetic fields - they are the only waves that can also travel through a vacuum, so they do not need a medium
Moreover, waves are further classified into:
- Transverse waves are those in which the vibration of the wave occurs in a direction perpendicular to the direction of propagation of the wave
- Longitudinal waves are those in which the vibration of the wave is parallel (back and forth) to the direction of propagation of the wave
Sound waves are oscillations of a medium that occurs back-and forth along the direction of propagation of the wave. Therefore, they are mechanical (they need a medium to propagate) and longitudinal. So the correct answer is
D) Mechanical and Longitudinal
Learn more about sound waves:
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