A planet's orbit around the sun affect's the planet's ability to support life

How many grams are in 2.30 x 10^23 atoms in Na?

aksik [14]

There are 8.786 g

<h3>Further explanation </h3>

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

2.30 x 10²³ atoms in Na :

$\tt mol=\dfrac{2.3\times 10^{23}}{6.02\times 10^{23}}=0.382$

mass :

$\tt mass=mol\times Ar~Na\\\\mass=0.382\times 23=8.786~g$

4 0

3 years ago

At stp, the ratio of the root-mean-square speed of co2 to that of so2 is ________.

Anastaziya [24]

Since pressure is connected to force, the force on a wall is straightly proportional to the square of the velocity times the mass. The ratio of the molecular weights of the CO2 and SO2 is (64.066 / 44.01) = 1.456. But, we are not yet done. The actual rms velocity has to be taken as the square root of that number, so the answer is 1.206.

4 0

3 years ago

A gas sample in a closed, expandable container of initial volume 5.00 l was allowed to warm from 25 °c to 35 °

mylen [45]

Charles law states that volume of gas is directly proportional to temperature of gas at constant pressure and fixed amount of gas.
V / T = k
where V - volume , T - temperature in Kelvin and k - constant
$\frac{V1}{T1} = \frac{V2}{T2}$
where parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
T1 = 25 °C + 273 = 298 K
T2 = 35 °C + 273 = 308 K
substituting values in the equation,
$\frac{5.00L}{298 K} = \frac{V}{308 K}$
V = 5.17 L
new volume is 5.17 L

7 0

4 years ago

5. Which elements are examples of nonmetals?

kykrilka [37]

Answer:

B

Explanation:

ifhwndidbsnsdijwjsidbebejdidid

5 0

3 years ago

Be sure to answer all parts. part 1 out of 4 how many nucleophilic centers are present in methanol (ch3oh)?

leva [86]

Answer:

One nucleophilic center

Explanation;

Nucleophile:

Nucleophile is a substance which is nucleus loving in nature (<em>Nucleo</em>; Nucleus , <em>phile</em>; Loving). It is known as a specie which donates a lone pair of electrons to electrophile (electron loving) in a chemical reaction.

Thus, Nucleophile is the region of higher electron density in a molecule and attacks on the lower electron density region of another molecule. Also, the nucleophile can also contain a negative charge.

Number of Nucleophilic centers in Methanol:

The chemical structure of Methanol is attached below and it can be observed that the oxygen atom is containing two lone pair of electrons. Hence, the oxygen atom can act as a nucleophilic center. Therefore, there is only one nucleophilic center in methanol.

H₃C-OH + H₃C-Br → H₃C-O-CH₃ + HBr

In above reaction methanol is acting as a nucleophile and is attacking on electrophilic center (Carbon) of methyl bromide yielding dimethyl ether.

8 0

3 years ago

Read 2 more answers