Calculate the minimum volume of oxygen gas, at room temperature and pressure (r. t.p) required to completely burn 56g of methane gas

The volume of oxygen will be 168 dm³.

Explanation:

Given data:

mass of methane = 56 g

volume of oxygen = ?

Solution:

First of all we will write the balance chemical equation.

CH₄ + 2O₂ → CO₂ + 2H₂O

Now we will calculate the moles of methane:

number of moles = mass / molar mass

number of moles = 56 g / 16 g/mol

number of moles = 3.5 mol

Now we will compare the moles of oxygen and methane.

                                CH₄  :   O₂

                                   1     :     2  

                                 3.5   :    3.5 × 2 = 7

The moles of oxygen are 7 mol.

Now we will calculate the volume of oxygen. The gas is at room temperature and pressure so, one mole of gas will occupy 24 dm³ volume and 7 mole will occupy,

7 × 24 dm³ = 168 dm³

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).