Which of the following has the smallest electronegativity A: potassium
B: lithium
C: cesium
D: sodium
using the periodic table

Muscle fiber i think that i right

Answer : option b) two grams of hydrogen react with one gram of oxygen to form two grams of water.explanation :

the equation for synthesis of water is as follows;

here two moles of hydrogen are used with one mole of oxygen which gives one molecule of water as a product. but shana misinterpreted 2 moles as 2 grams in this equation.

Answer

nitrogen fixation is the process of fixing gaseous nitrogen to usable forms while in decomposition the source of nitrogen is organic waste.

explanation

fixation

nitrogen in its gaseous form (n2) can’t be used by most living things. it has to be converted or ‘fixed’ to a more usable form through a process called fixation.

biologically: nitrogen gas (n2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (nh4+), which can be used by plants.

decomposition:

plants take up nitrogen compounds through their roots. animals obtain these compounds when they eat the plants. when plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers. this decomposition produces ammonia, which can then go through the nitrification process.

Carbon is found in all living organisms. the constant flow of carbon on earth through organisms and the air is known as the carbon cycle. plants absorb carbon from the atmosphere in the form of carbon dioxide. they use it for respiration and  convert it into simple sugars by  photosynthesis  process. animals consume plants, transferring carbon along the food chain. plants and animals respire and release carbon into air. when the animals and plants die, they are eaten by microorganisms. carbon enters back into the atmosphere in the form of  carbon dioxide.