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3 years ago

From Earth to space, what is the correct order of the main layers in the atmosphere?

Chemistry

1 answer:

Kamila [148]3 years ago

6 0

Answer:

troposphere, the stratosphere, the mesosphere and the thermosphere

Explanation:

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Which of the following is the greatest mass? Select one:

algol13

Answer:

B. 1.000 × 10-4 kg

Explanation:

A. 1.000 × 10-8 Mg = 0.00000001 Mg = 0.1 mg

B. 0.0001 kg = 0.1 g

C. 1000 ug = 1 mg

D. 1 .000 × 10-2 cg = 0.01 cg = 0.1 mg

A = D

B > C > A = D

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3 years ago

What three human body systems coordinate cause an arm to move

tia_tia [17]

(A) nervous, muscular, skeletal

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Which would be best categorized as heat transfer by conduction? A) Wearing a white shirt to stay cool on a summer day. B) Warmin

erik [133]

Answer:

Conduction is heat transfer through the direct contact of two subjects. The best example of this would be C, because it is the direct transfer of heat from the lightbulb to your hand. :)

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3 years ago

if lance armstrong is riding his bicycle at speeds of 15 m/s, how long will it take him to travel 81.9 meters?

Leona [35]

Answer:

5.46

Explanation:

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3 years ago

Read 2 more answers

A laboratory analysis of a 100 g sample finds it is composed of 1.8 g hydrogen, 56.1 g sulfur, and 42.1 g oxygen. What is its em

Neporo4naja [7]

Answer: The empirical formula is $H_2S_2O_3$

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mas of H = 1.8 g

Mass of S = 56.1 g

Mass of O = 42.1 g

Step 1 : convert given masses into moles.

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{1.8g}{1g/mole}=1.8moles$

Mass of S = $\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{56.1g}{32g/mole}=1.8moles$

Moles of O= $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{42.1g}{16g/mole}=2.6moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For H = $\frac{1.8}{1.8}=1$

For S = $\frac{1.8}{1.8}=1$

For O = $\frac{2.6}{1.8}=1.5$

Converting to whole number ratios

The ratio of H: S: O= 2: 2: 3

Hence the empirical formula is $H_2S_2O_3$

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3 years ago