I thought I could make you day so here is your Anwser.The mass of a sample containing 4.00 mol of H2 is 8.08 g. The molar mass of hydrogen (H2) is 2.02 g/mol. In other words, there are 2.02 g in 1.00 mol of H2. The question is how many grams are in 4.00 mol of H2. Let's use proportion: 2.02 g : 1.00 mol = x : 4.00 mol. x = 2.02 g * 4.00 mol : 1.00 mol. x = 8.08 mol. Thus, there are 8.08 g of the sample of 4.00 mol of H2.
<u>Answer:</u> The excess reagent for a given reaction is nitrogen dioxide.
<u>Explanation:</u>
Limiting reagent is defined as the reagent which is present in less amount and also it limits the formation of products.
Excess reagent is defined as the reagent which is present in large amount.
For the given chemical reaction:
By stoichiometry of the reaction:
1 mole of water reacts with 3 moles of nitrogen dioxide gas
So, 0.5 moles of water will react with = 
of nitrogen dioxide gas.
As, the given amount of nitrogen dioxide gas is more than the required amount. Thus, it is considered as an excess reagent.
Hence, nitrogen dioxide is an excess reagent.
The correct answer is due to rapid conversion of nitrates into nirites in extracellular fluids.
Due to the fact that it is quickly transformed to nitrates and nitrites in the extracellular fluid, nitric oxide (NO) functions as a paracrine signal that only impacts nearby cells. Because it relaxes the smooth muscle cells in blood vessel walls, nitric oxide (NO) causes blood vessels to widen. Cell signaling is a type of cellular communication in which a cell produces a signal to cause changes in neighboring cells, changing the behavior of those cells. Paracrine signaling is one type of cell signaling. Responses to allergens, tissue repair, the development of scar tissue, and blood clotting are a few examples of paracrine signaling. The transmission of signals through synapses between nerve cells is known as paracrine signaling.
Learn more about paracrine signal here :-
brainly.com/question/12538424
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Answer:
balsa wood
Explanation:
I think the answer is balsa wood.
