How did mendeleev orginally organize the element in his periodic table

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 325 mL of insulin at a concentration of 30.0 mg/mL. What is the total mass of insulin in the bottle?

How many moles of nitrogen, N, are in 71.0g of nitrous oxide, N2O?.

This is a characteristic of the elements in the periodic table that shows a pattern. It may increase or decrease across or down the table.

How do we use chemistry in our everyday life?

Assume the following: canola oil has 6% saturated fats and 94% unsaturated fats; corn oil has 13% saturated fats and 87% unsaturated fats; and coconut oil has 91% saturated fats and 9% unsaturated fats.

Why did Whittaker propose a five kingdom system

Why is melting an ice cube a reversible physical change?

What volume of 0.500 M zinc nitrate contains 2.94 g of zinc nitrate?

Which statement is true about the elements fluorine, chlorine, and oxygen? A. They are all halogens. B. They react easily with metals. C. They are similar to noble gases. D. They are all nonmetals.

What kind of element has the greatest tendency to attract electrons? why?