|
Author Question: In this reaction, what is the substance oxidized? Zn + 2 HCl ZnCl2 + H2 (Read 305 times) |
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.