Question

ОТВЕТЬТЕ НА ВОПРОСЫ ПОЖАЛУЙСТА:№1.В какой массе и объёме азота N2 при н.у. содержится 3,01*10(23) молекул?№2.В ряду элементов P-S-Cl: А)увеличивается атомный радиус Б)уменьшается атомный радиус В)неметаллические свойства ослабевают Г)неметаллические свойства возрастают

Answer 1

1 моль любого вещества содержит 6,02 * 10^23 частиц
следовательно у тебя 0,5 моль азота.
m = n * M = 0.5 * 28 = 14г
V = n * Vm = 0.5 * 22,4 = 11,2л

задание 2
г) неметаллические свойства возрастают

Answer 2

Answer 1:

To calculate the mass and volume of nitrogen gas (N2) containing 3.01 * 10^23 molecules at standard temperature and pressure (STP), we can use the ideal gas law.

The ideal gas law states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

At STP, the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (K).

Since we are given the number of molecules (3.01 * 10^23), we need to convert it to moles. One mole of any substance contains Avogadro's number of particles, which is approximately 6.022 * 10^23.

Therefore, the number of moles (n) can be calculated as follows:

n = (3.01 * 10^23) / (6.022 * 10^23)

Now, we can substitute the values into the ideal gas law equation to find the volume (V):

PV = nRT

(1 atm) * V = [(3.01 * 10^23) / (6.022 * 10^23)] * (0.0821 L * atm / mol * K) * (273.15 K)

Simplifying the equation, we find:

V = [(3.01 * 10^23) / (6.022 * 10^23)] * (0.0821 L * atm / mol * K) * (273.15 K)

Using this equation, we can calculate the volume of nitrogen gas containing 3.01 * 10^23 molecules at STP.

Answer 2:

In the series of elements P-S-Cl, the following changes occur:

A) The atomic radius generally decreases as we move from left to right across a period in the periodic table. Therefore, the atomic radius of chlorine (Cl) is expected to be smaller than that of sulfur (S), which in turn is expected to be smaller than that of phosphorus (P).

B) The atomic radius generally decreases as we move from left to right across a period in the periodic table. Therefore, the atomic radius of chlorine (Cl) is expected to be smaller than that of sulfur (S), which in turn is expected to be smaller than that of phosphorus (P).

C) Nonmetallic properties generally increase as we move from left to right across a period in the periodic table. Therefore, the nonmetallic properties of chlorine (Cl) are expected to be stronger than those of sulfur (S), which in turn are expected to be stronger than those of phosphorus (P).

D) Nonmetallic properties generally increase as we move from left to right across a period in the periodic table. Therefore, the nonmetallic properties of chlorine (Cl) are expected to be stronger than those of sulfur (S), which in turn are expected to be stronger than those of phosphorus (P).

Note: The information provided above is based on general trends in the periodic table. Actual properties may vary depending on specific factors and compounds.