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julia-pushkina [17]

4 years ago

11

Can someone help me with this research for the topics plz help. If everything is properly done then I will mark the brainliest a

nswer!!!!

1 answer:

Paha777 [63]4 years ago

5 0

Eeddtyggrdtttuuhhuhhuuuuyyrrrtyy

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COMPARE: Identify three ways that a biologist's research is similar to an astronomer's. Both scientists always perform experimen

Ilya [14]

The answer is B thank u for your service bye

7 0

3 years ago

What is the average kinetic energy of 1 mole of a gas that is at 100 degrees Celsius?

Paha777 [63]

The average kinetic energy of an ideal gas is calculated as

KE_avg = 3/2 kT

where T is the temperature in Kelvin and k=R/N_A; R is the universal gas constant and N_A is the number of moles.

Thus, upon substitution we get

KE_avg = 3/2(8.314/1)(100+273)
KE_avg = 3/2(8.314)(373)
KE_avg = 4651.683

The average kinetic energy of 1 mole of a gas at 100 degree Celsius is 4651.683 J.

3 0

3 years ago

When a 1.06 g sample of Compound Q, a nonelectrolyte, is dissolved in 11.6 g of water, the boiling point of the resulting soluti

Vesna [10]

Answer:

The molar mass of compound Q is 100 g/mol

Explanation:

Step 1: Data given

Mass of compound Q = 1.06 grams

Mass of water = 11.6 grams

Boiling point of the solution = 100.47 °C

Boiling point of water = 100.00 °C

Kb for water = 0.512 °C/m

Step 2: Calculate molality

ΔT = i*kb*m

⇒ with ΔT = the boiling point elevation = 0.47 °C

⇒ with i = the van't Hoff factor = 1

⇒ with kb = the boiling point elevation constant = 0.512 °C/m

⇒ with m = the molality = moles compound Q / mass water

m = ΔT / (i*Kb)

m = 0.47 / 0.512

m = 0.918 molal

Step 3: Calculate moles of Q

Molality = moles Q / mass H2O

moles Q = 0.918 molal * 0.0116 kg

moles Q = 0.0106 moles

Step 4: Calculate molar mass

Molar mass Q = mass Q / moles Q

Molar mass Q = 1.06 grams / 0.0106 moles

Molar mass Q = 100 g/mol

The molar mass of compound Q is 100 g/mol

3 0

3 years ago

What is the density of an object with a volume of 11.24 L and a mass of 3.45 g ?

Tasya [4]

Answer:

0.306 g/L

Explanation:

D = M/V

D= 3.45 g/11.24 L

D= 0.306 g/L

5 0

3 years ago

N yogurt de 125 g muestra en su etiqueta el contenido de algunas de sus sustancias nutricionales:¿Cuál es la composición en tant

poizon [28]

Answer:

Sustancia Masa (g) Composición (% m/m)

<em>Proteínas</em> 5,5 4,4

<em>Azúcares</em> 5,0 4,0

<em>Sodio </em>0,06 0,048

<em>Potasio </em>0,15 0,12

Explanation:

Para calcular la composición porcentual en masa de las sustancias debemos usar la siguiente ecuación:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100$

En donde:

$m_{s}$ es la masa de la sustancia

$m_{sol}$ es la masa del yogurt = 125 g

Para las proteínas:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100 = \frac{5,5 g}{125 g} \times 100 = 4,4 \%$

Para los azúcares:

$\%_{m/m} = \frac{5,0 g}{125 g} \times 100 = 4,0 \%$

Para el sodio:

$\%_{m/m} = \frac{0,06 g}{125 g} \times 100 = 0,048 \%$

Para el potasio:

$\%_{m/m} = \frac{0,15 g}{125 g} \times 100 = 0,12 \%$

Espero que te sea de utilidad!

6 0

3 years ago