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3 years ago

11

How do atoms form a new compound? A: By sharing electrons with each other B: By losing electrons to each other C: By gaining ele

ctrons from each other D: By losing electrons

1 answer:

scoundrel [369]3 years ago

8 0

By sharing electrons with one another

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Đốt cháy hoàn toàn một amin đơn chức thu được CO2 và H2O theo tỉ lệ nCO2 : nH2O = 6 : 7. Vậy CT amin đó là

Sav [38]

Câu trả lời là Anlyamin

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3 years ago

How many microliters are in 0.68 liters?

kolezko [41]

There are 680,000 microliters in 0.68 liters.

8 0

3 years ago

Which of the following apply to diffusion. Select all that apply. Solids can diffuse in liquids. Liquids can diffuse in liquids.

e-lub [12.9K]

Correct answers are:

Solids can diffuse in liquids. Think of a sugar cube sitting at the bottom of a cup of tea.
Liquids can diffuse in liquids. Think of a drop of food colouring in water
It is the process of intermingling atoms from one substance into another.

The other answers are <em>incorrect</em> because:

Gas molecules are far apart and diffuse rapidly.
A solid can diffuse into another solid. Pure lead can diffuse into gold, and pure gold can diffuse into lead.

3 0

3 years ago

Read 2 more answers

In Experiment 9, a 1.05 g sample of a mixture of NaCl (MW 58.45) and NaNO2 (MW 69.01) is reacted with excess sulfamic acid. The

Kaylis [27]

Answer:

There is 76.6 mL of nitrogen collected

Explanation:

<u>Step 1: </u>Data given

Mass of the sample = 1. 05 grams

The sample is 40.00% by mass NaNO2

MW of NaCl = 58.45 g/mol

MW of NaNO2 = 69.01 g/mol

Temperature = 22.0 °C

Pressure = 750.0 mmHg = (750/760) atm

The vapor pressure of water at 22.0°C is 19.8 mm Hg = 0.02605 atm

<u>Step 2:</u> Calculate mass of NaNO2

(40/100)*1.05 = 0.42 grams

<u>Step 3:</u> Calculate moles of NaNO2

Moles NaNO2 = 0.42 grams / 69.01 g/mol

Moles NaNO2 = 0.00608 moles

<u>Step 4:</u> Calculate moles of N2

For 2 moles of NaNO2 we'll get 1 mol of N2

For 0.00608 moles of NaNO2 we'll get 0.00608/2 = 0.00304 moles

<u>Step 5:</u> Calculate pressure of N2

P = 750.0 - 19.8 = 730.2 mmHg = (730.2/760)atm = 0.96079 atm = 97352 Pa

<u>Step 6:</u> Calculate volume of N2

PV = nRT

⇒ P = the pressure of N2 = 0.96079

⇒ V = the volume of N2 = TO BE DETERMINED

⇒ n = moles of N2 = 0.00304 moles

⇒ R = the gas constant = 0.08206 L*atm/K*mol

⇒ T = the temperature = 22°C = 295 Kelvin

V = (0.00304*0.08206*295)/0.96079

V = 0.0766 L = 76.6 mL

There is 76.6 mL of nitrogen collected

4 0

3 years ago

10. What effect does temperature have on molecular motion? Using this explanation, explain why both pressure and volume can decr

vovangra [49]

Answer:

If the temperature increases the molecular movement as well, and if it increases the same it will happen with the molecular movement.

Pressure, volume and temperature are three factors that are closely related since they increase the temperature, the pressure usually decreases due to the dispersion of the molecules that can be generated, so the volume also increases.

If the temperature drops, the material becomes denser, its molecules do not collide with each other, their volume and pressure increases.

Explanation:

The pressure is related to the molecular density and the movement that these molecules have.

The movement is regulated by temperature, since if it increases, the friction and collision of the molecules also.

On the other hand, the higher the volume, the less pressure there will be on the molecules, since they are more dispersed among themselves.

(in the opposite case that the volume decreases, the pressure increases)

5 0

3 years ago