ANSWER: We know, by law of constant proportion :
Chemical compounds always contains its component in constant fixed ratio or in fixed percentage without depend on its source, method of preparation and mass of compound.
Therefore, percentage of oxygen is same for any mass.
Hence, this is the required solution.
Explanation:
Answer:
B.
Explanation:
The only way to make this comparison is by comparing their position to a fixed object outside the vehicle. Comparing to a fixed object inside the vehicle will show no movement, while a moving object inside the vehicle will seem as though the car is still while the object is in motion. Comparing to a moving object outside the vehicle will conflict with the vehicle, if the object is moving at the same speed and direction as the vehicle, it will seem as though neither is moving. The only way to make this comparison correctly is by comparing to an object outside the vehicle that is not moving so that the only variable that can be moving is the vehicle itself.
Answer:
1) B and 2) D
Explanation:
when scientists refer to the naked eye, it is referring to the eye without any sort of magnifying device, such as a microscope. Algae blooms can result naturally or by human interference