At the boiling point, the density of the liquid is 809 g/l and that of the gas is 4.566 g/l. how many liters of liquid nitrogen

Answer:

The concentration of P in the pond at equilibrium is 0.034 g/m³

Explanation:

Given the total mass = 49.9 g

1 day = 24 hours

mass per hour;

Incoming mass = (49.9 g / day) * (1 day /24 hr )

            = 2.079 g/hr

Outgoing mass = 0

Mass lost due to sunlight = k V  

Given the half-life = 3.4 hours

For a first-order reaction; k, the rate constant = ln2/t, where t is the half-time

                     ln 2= 0.693, V= volume

                     k = 0.693 / t_half = 0.693 / 3.4 = 0.2038 hr⁻¹

Substituting all parameters into the equation k V;

Mass lost to sunlight = k V  

= Incoming mass per hour / kV

= 2.079 g/hr / (0.2038 hr⁻¹ x 300 m³)

=  

0.034 g/m³

-0° is the freezing temperature of ice or ice cream.

After four hours of cooling, the soup reached a temperature of 140 F (or) 42 C.

Explanation:

A food worker allowed a cup of soup to cool for two hours,

step 1: The temperature attained in two hours is 70 F (or) 21 C

step 2: Consequently, in four hours, this doubles the value

Therefore, the temperature after four hours is 2(70)= 140 F (or) 2(21)= 42 C

The rate equation for a first order reaction can be expressed as follows:

In this context, k represents the reaction's rate constant, t denotes the time the reaction takes, is the initial concentration, and is the concentration at time t.

The rate constant of the reaction is .

(a) If we start with an initial concentration of 100, when 90% of the substance is eliminated, the remaining quantity at time t will be 100-90=10. By substituting the values,

The time required to destroy 90% of the substance amounts to 23.03 days.

(b) If the initial concentration is set at 100, when 99% is destroyed, the present amount at time t will be 100-99=1. By substituting the input values,

This results in a duration of 46.06 days required to eradicate 99% of the chemical.

(c) Should the initial concentration be set at 100, with 99.9% of the chemical removed, the remaining quantity at time t will be 100-99.9=0.1. Substituting the values yields

Thus, the time needed to eliminate 99.9% of the chemical is calculated as 69.09 days.

According to the periodic table:
the molar mass of carbon is 12 g/mol
the molar mass of hydrogen stands at 1 g/mol
the molar mass of oxygen is 16 g/mol

the molar mass of <span>acetylsalicylic acid calculates to 9(12) + 8(1) + 4(16) = 180 g/mol

To find the number of moles, we apply the formula mass / molar mass = 0.5 / 180 = 2.778 x 10^-3 moles

To determine the number of molecules, we multiply the moles by Avogadro's number as shown:
number of molecules = </span>2.778x10^-3x6.02x10^23 =1.672 x 10^21 molecules