Why was the International System of Units (SI) developed? A. It was developed to compete with the English Standard System of Units.
B. It was developed to allow countries to follow their own systems of measurement.
C. It was developed to help scientists keep their data, observations, and measurements secret from other scientists.
D. It was developed to help scientists compare measurements made by different people in different locations using different tools.
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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.

What is the relation between concentration of reactants and the rate of chemical reaction?

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide