Question 8 Science Assignment Help -

Question 8 Science Assignment Help. Question 8 Science Assignment Help.

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As long as you use tongs or clamps to hold the container, you can heat glassware in the blue flame zone of a Bunsen burner.

True

False

Question 8 Science Assignment Help[supanova_question]

Question 12 Science Assignment Help

QUESTION 12

The formula for finding the density of an object is

Density = volume / mass

Density = mass x volume

Density = mass / volume

Density = mass + volume

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Question 11 Science Assignment Help

What is the density of an object with a mass of 12.0 g and a volume of 80.0 cubic centimeters?

0.2 g/cm³

0.15 g/ cm³

0.150 g/ cm³

0.20 g/ cm³

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Queston 10 Science Assignment Help

A hazard rating of six is the most severe NFPA rating.

True

False

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Question 9 Science Assignment Help

During an experiment in which your clothing catches fire, you should:

Smother the flames with your hands

Yell for help

Yell fire

Stop, drop, and roll while yelling fire

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What is the proper method for transporting and cooling hot glassware? Science Assignment Help

		Rinse the glassware under cold water
		Allow the glassware to cool down naturally and handle it with tongs
		Fan the glassware with a paper fan and handle it with tongs
		Use a cloth to hold the glassware and wave it through the air

What is the proper method for transporting and cooling hot glassware? Science Assignment Help[supanova_question]

Where are the trade winds found? Science Assignment Help

		over the equator
		at the poles
		between 0 and 30 degrees latitude
		between 30 and 60 degrees latitude

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Which of the following statements is true about greenhouse gases? Science Assignment Help

They trap heat within the atmosphere.

They absorb harmful ultraviolet radiation.

They deplete ozone in the stratosphere

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Which of the following dominates wind movement at the poles? Science Assignment Help

		trade winds
		Westerlies
		Easterlies
		both b and c

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How to calculate the pH? & which would be the best buffer Science Assignment Help

1. Acetylsalic acid is a week acid (HC9H7O4 Pka=3.48) A 25 mL solution of 0.15 M aspirin is titrated with 0.10 M NaOH. calculate the pH of the solution after 15 mL of NaOH is added and the volume of NaOH needed to reach the equivalence point of the titration.

2.which of the following acid-base solutions would be the most effective buffer when dissolved in water?

A. .50M CH3COOH & .10M CH3COONa

B. .30 M CH3COOH & .30 M CH3COONa

C. .30M NaCl & .30 M HCl

D. .20M NH3 & .40M HCl

E. .40M HBr & .20M NaOH

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Question 8 Science Assignment Help

		True
		False

		Density = volume / mass
		Density = mass x volume
		Density = mass / volume
		Density = mass + volume

		0.2 g/cm³
		0.15 g/ cm³
		0.150 g/ cm³
		0.20 g/ cm³

		True
		False