7200sec÷60sec in a minute÷60minutes in an hour=2hours. 150km÷ 2 hours= 75 km/hour
Answer:
65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large
deposit of dust that contained substances only found in asteroids, What most likely killed off the dinosaurs?
Explanation:
If you'd like the full working, here it is:
I calculated this by using the formula triangle.
Mass
Number Formula
Of moles Mass
To calculate the number if moles in a substance, you need to divide the Mass by the Formula mass. You get the formula mass by adding the atomic masses of the elements in the compound together. In this situation, H2O, it would be two hydrogen molecules plus one oxygen molecule which is 2 + 16. This is because the atomic mass of Hydrogen is 1 and the atomic mass of Oxygen is 16.
Now that we have the Formula mass we can go ahead and do the calculation since we already have the Mass. You do as follows:
Mass divided by Formula mass which is in this case - 25 divided by 18
By doing this calculation you will get the answer which is 1.38 moles which can be rounded to 1.4
Hope this helps :)
U can assume that riding the bus is a faster way to get to school because it is capable of a faster speed than a bicycle
<span>1. Cellular- One cell composed of molecules and organelles. A neuron is a type of cell
2. Tissue- A group of cells form a tissue. Smooth muscle tissue is an example of a tissue
3. Organ- A combination of tissues that form a discrete entity. The heart is an organ
4. Organ system- A group of organs that work together to perform a function. The respiratory system is an organ system.
5. Organism- A combination of organ systems that come together to make a living being. A human is an organism.</span>
