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Which of the following observations is/are examples of chemi…

Which of the following observations is/are examples of chemical change?  1.Iron (Fe) rusts, forming Fe 2O 3. 2.The density of water increases when it changes from a solid to a liquid. 3.Sodium chloride melts at 801 °C.

Published September 3, 2024
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A property of the system that depends only on its present st…

A property of the system that depends only on its present state and is independent of the pathway is called

Published September 3, 2024
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Which of the following statements concerning water (H 2O) is…

Which of the following statements concerning water (H 2O) is/are CORRECT?  1.H 2O is a chemical compound. 2.Water is a homogeneous mixture. 3.Liquid water is a mixture of elemental hydrogen and oxygen.

Published September 3, 2024
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The correct name for the compound S Cl 2 is  _____.

The correct name for the compound S Cl 2 is  _____.

Published September 3, 2024
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Wh ich of the following is the correct formula for cobalt(II…

Wh ich of the following is the correct formula for cobalt(III) bromide?

Published September 3, 2024
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Express the number 2.07 × 10 4 in common decimal form.

Express the number 2.07 × 10 4 in common decimal form.

Published September 3, 2024
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Express the number 5.16 × 10 –3 in common decimal form.

Express the number 5.16 × 10 –3 in common decimal form.

Published September 3, 2024
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What is the density of a gas, with molar mass of [mm] g/mol,…

What is the density of a gas, with molar mass of [mm] g/mol, at STP?

Published September 3, 2024
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Hydrogen can be used as a fuel as illustrated by the equatio…

Hydrogen can be used as a fuel as illustrated by the equation2H2(g)  +  O2(g) →      2H2O(g)  +  energyWhat volume of oxygen gas, O2, would be required to burn [v] mL of H2 at STP?

Published September 3, 2024
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Convert: –30.8°C = ____________ °F. 

Convert: –30.8°C = ____________ °F. 

Published September 3, 2024
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