Answer
D
Explanation
The conservation of mass principle says that whatever you do to a chemical, the mass of the reactants must equal the mass of the products.
There is a loss somewhere that has not been accounted for.The ribbon and oxygen add up to 6.95 which means that the reactants (oxygen and Magnesium ribbon) added up to more than the mass of the product.
The product was only 6.53 grams. Why that is so is another matter and how they measured the oxygen is still yet something else.
A is wrong. The mass of Mg was measured, it was not calculated.
B is wrong. The experiment really depends on moles not raw mass (which is measured and then converted to mass.)
C is wrong. They are not equal. The products are a little less than the mass of the reactants added together. They do not differ by much, but they do differ.
Answer:
D
Explanation:
A tectonic plate boundary, as the name intuitively suggests, is the boundary between two tectonic plates. A tectonic plate boundary can be a convergent boundary or a divergent boundary. Convergent boundaries are hotspots for earthquakes because of the occasional stress release (as energy) as the tectonic plates collide. Towns & cities close to these boundaries are highly prone to destruction by earthquakes and tsunamis.
Answer:
The answer is C.
Explanation:
In the example given in the question, it is stated that 20 of the 2000 sheep are tested and 15 are positive for the disease's antibodies. This indicated that the disease was transmitted to humans from the sheep and it is an example of zoonosis which is used to describes diseases that can be passed on to humans from animals.
I hope this answer helps.
The answer is b the Development of circulatory shock
Answer:
A polymer is a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together
Synthetic Polymers: nylon, polyethylene, polyester, Teflon, and epoxy.
Natural Polymers: silk, wool, DNA, cellulose and proteins
