Which statement summarized the difference between mass and weight?

O gás oxigênio necessário a respiração para a síntese de glicose pode ser em certas condições explicado pelo modelo de gás ideal

Marat540 [252]

Answer:

Em 64 g de gás oxigênio no cilindro de mergulho, existem 2 moles de gás oxigênio e (1,20 × 10²⁴) moléculas de gás oxigênio.

In 64 g of Oxygen gas in the diving cylinder, there are 2 moles of Oxygen gas and (1.20 × 10²⁴) molecules of Oxygen gas.

Explanation:

O número de moles de um elemento é dado como

Número de moles = (Massa / Massa molar) Massa de gás oxigênio no cilindro de mergulho = 64 g

Massa molar de oxigênio gás = 32.0 g / mol

Número de moles de gás oxigênio no cilindro de mergulho = (64/32) = 2 moles

O número de moléculas em 1 mole de qualquer substância = (6,0 × 10²³)

O número de moléculas em 2 moles de oxigênio no cilindro de mergulho = 2 × (6,0 × 10²³) = 12,0 × 10²³ = (1,20 × 10²⁴) moléculas

Espero que isto ajude!!!

English Translation

The number of moles of an element is given as

Number of moles = (Mass/Molar Mass)

Mass of Oxygen gas in the diving cylinder = 64 g

Molar Mass of Oxygen gas = 32.0 g/mol

Number of moles of Oxygen gas in the diving cylinder = (64/32) = 2 moles

The number of molecules in 1 moles of any substance = (6.0 × 10²³)

The number of molecules in 2 moles of Oxygen in the diving cylinder = 2 × (6.0 × 10²³)

= 12.0 × 10²³ = (1.20 × 10²⁴) molecules

Hope this Helps!!!

6 0

3 years ago

A car is driving away from a crosswalk. The formula d = t 2 + 2 t expresses the car's distance from the crosswalk in feet, d , i

Ede4ka [16]

Answer:

1) No, the car does not travel at constant speed.

2) V = 9 ft/s

3) No, the car does not travel at constant speed.

4) V = 5.9 ft/s

Explanation:

In order to know if the car is traveling at constant speed we need to derive the given formula. That way we get speed as a function of time:

V(t) = 2*t + 2 Since the speed depends on time, the speed is not constant at any time.

For the average speed we evaluate the formula for t=2 and t=5:

d(2) = 8 ft and d(5) = 35 ft

$V_{2-5}=\frac{d(5)-d(2)}{5-2}=9 ft/s$

Again, for the average speed we evaluate the formula for t=1.8 and t=2.1:

d(1.8) = 6.84 ft and d(2.1) = 8.61 ft

$V_{1.8-2.1}=\frac{d(2.1)-d(1.8)}{2.1-1.8}=5.9 ft/s$

4 0

4 years ago

How do I solve the equation

ioda

First you see the difference in mass numbers 238-234 = 4
Its is an alpha particle as it decreases the mass no by 4 .

6 0

3 years ago

TRUE/FALSE, the scientific question is written like “I wonder if [dependent variable] is affected by [independent variable].”

sergiy2304 [10]

True as the independent variable is over the dependent variable and controls it as the dependent relies on the independent.

6 0

3 years ago

Using a cathode ray tube, Thomson confirmed that

Natasha2012 [34]

<span>atoms are made of particles that have a negative charge.</span>

4 0

4 years ago

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