Answer:
The mass methane (CH4) required is, 25 grams (option C)
Explanation:
Mass of oxygen gas = 100 g
Molar mass of oxygen gas = 32 g/mole
Molar mass of methane gas = 16 g/mole
<u>Step 1:</u> Balance the reaction
2O2 + CH4 → CO2 + 2H2O
<u>Step 2:</u> Calculate the moles of O2:
Moles O2 = mass of O2 / Molar mass of o2
Moles O2 = 100g / (32g/mole) = 3,125 moles
⇒From the balanced reaction we conclude that 2 moles of O2 react with 1 mole of CH4
⇒ So, 3.125 moles of O2 react with 3.125/2 = 1.563 moles of CH4
<u>Step 3:</u> Calculate the mass of CH4:
Mass of CH4 = moles of CH4 x Molar mass of CH4
Mass of CH4 = 1.563 moles / (16g/ moles) = 25.008 grams CH4
It is an endothermic reaction, the chemicals (probably water and ammonium nitrate) require more energy to react therefore it absorbs heat from it's surrounding to power the reaction and thus lowering the surrounding temperature. <span />
C. that is the answer to the question
706000 in scientific notation is 7.06x10^5
Answer:
- Two black balls: they represent a diatomic molecule composed by two atoms of the same element.
- One black ball and two black balls: they represent a compound formed by two different elements.
- One gray ball and two black balls: they represent a compound formed by two different elements.
- Two black-dotted balls: they represent a diatomic molecule composed by two atoms of the same element.
Explanation:
Hey there!
In this case, according to the given information, we can firstly bear to mind the fact that each ball color represents a different element, for that reason we can tell the following:
- Two black balls: they represent a diatomic molecule composed by two atoms of the same element.
- One black ball and two black balls: they represent a compound formed by two different elements.
- One gray ball and two black balls: they represent a compound formed by two different elements.
- Two black-dotted balls: they represent a diatomic molecule composed by two atoms of the same element.
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