All categories

3 years ago

Determina la masa molar y el volumen que ocupa la siguiente sustancia CO2, si su masa es de 28 gr. *

Mathematics

1 answer:

balandron [24]3 years ago

7 0

Answer:

Para el CO₂ sabemos que:

densidad = 0,001976 g/cm³

Sabemos que:

densidad = masa/volumen

Entonces, si tenemos una masa de 28 g, podemos escribir:

volumen = masa/densidad

volumen = (28g)/(0,001976 g/cm³) = 14,170 cm^3

Para obtener la masa molar (es decir, la masa de un mol de esta sustancia) simplemente sumamos la masa de un mol de cada componente.

Carbono: tiene una masa molar de 12 g/mol

Oxígeno: tiene una masa molar de 16 g/mol (y tenemos dos oxígenos)

entonces la masa molar va a ser:

masa molar = 12g/mol + 2*16g/mol = 44 g/mol

Es decir, un mol de CO₂, pesa 44 gramos.

You might be interested in

HELP PLEASE BE QUICK

rewona [7]

Answer:

Radius is 2 centimeters

Step-by-step explanation:

<u>4π is the area of a circle</u>

<u>Area of a circle = πr^2</u>

4π / π = πr^2 / π

sqrt(4) = sqrt(r^2)

2 = r

Answer: Radius is 2 centimeters

4 0

3 years ago

The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing graduate management education. GMAT

telo118 [61]

Answer:

Null hypothesis: $\mu_{Phil} \geq 550$

Alternative hypothesis: $\mu_{Phil} < 550$

Step-by-step explanation:

1) Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

2) Solution to the problem

Let X the random variable that represent the score for all test‑takers and the distribution for X is:

$X \sim N(\mu =550,\sigma=120)$

Let $\mu_{Phil}$ the true mean for the Philippines.

On this case we want to test is $\mu_{Phil}$

So the correct system of hypothesis for this case would be:

Null hypothesis: $\mu_{Phil} \geq 550$

Alternative hypothesis: $\mu_{Phil}< 550$

In order to test we know the population deviation and the sample size n=250. But we need the sample mean and a significance level to test the claim.

5 0

3 years ago

Given the unbalanced equation: Al + O2 → Al2O3 When this equation is completely balanced using smallest whole numbers, what is t

zlopas [31]

Answer:

The sum of the coefficients is 9.

Step-by-step explanation:

A chemical equation shows the chemicals that react (the reactants) followed by an arrow followed by the chemicals that are produced by the reaction (the products).

We have the following unbalanced equation

$\mathrm{Al}+\mathrm{O_2}\rightarrow\mathrm{Al_2O_3}$

To balance an equation, we add a coefficient to the front of each element or compound that requires it. Essentially you are multiplying the amount of atoms or compounds on one side to match the amount on the other side.

The balanced chemical equation is

$\mathrm{4Al}+\mathrm{3O_2}\rightarrow\mathrm{2Al_2O_3}$

The sum of the coefficients is equal to the sum of the number of reacting molecules and the number of products produced in the balanced chemical equation.

Therefore,

4 + 3 + 2 = 9

8 0

3 years ago

Eight less than a third of a number is the sum of that number and one.

scoundrel [369]

Answer:

$x = -13\frac{1}{2}$

Step-by-step explanation:

Eight less than a third of a number is the sum of that number and one.

Let the number be x.

That is:

$\frac{1}{3}x - 8 = x + 1\\ \\=> x - \frac{1}{3}x = -8 - 1 \\\\\frac{2}{3}x = -9\\\\x = -9 * \frac{3}{2}\\ \\x = \frac{-27}{2}$

$x = -13\frac{1}{2}$

6 0

3 years ago

How do you get the answer?

nignag [31]

Answer:

Where's the picture?

5 0

2 years ago