To what decimal place should each answer be rounded

how many significant figures does the rounded answer have

9 cm + 2.8 cm = 11.8 cm

List 2 examples of energy transformations necessary for the sporting event to take place

How many valence electrons does a neutral atom of chlorine have?

A drum used to transport crude oil has a volume of 162 L. How many grams of water, as steam, are required to fill the drum at 1.20 atm and 100°C?

Earth would not have seasons if?

An ecosystem is a geographical area ... where plants, animals, the landscape and the climate all interact. where plants, animals, the landscape and the climate are all independent of each other. where only plants live. independent of all other areas.

How is the ocean important to human survival? restate the question

A sample of pure lithium contains 7.99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

What ecosystem is being described in the passage?

In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction? a.

How do acids and bases affect the quality of freshwater sources?