If John's potato farm has an area of 35.5 hectares, how many pounds of fertilizer does John need to use?

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

If 3.00 g of titanium metal is reacted with 6.00 g of chlorine gas, cl2, to form 7.7 g of titanium (iv) chloride in a combination reaction, what is the percent yield of the product?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.