Answer:
4.43 g Fe
Explanation:
To find the mass of iron, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Fe (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Fe to grams Fe (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs because the given value (2.14) has 3 sig figs.
Molar Mass (Al): 26.982 g/mol
2 Al(s) + Fe₂O₃ ---> 2 Fe(s) + Al₂O₃(s)
Molar Mass (Fe): 55.845 g/mol
2.14 g Al 1 mole 2 moles Fe 55.845 g
---------------- x ----------------- x -------------------- x ------------------ = 4.43 g Fe
26.982 g 2 moles Al 1 mole
I believe it’s 32, I might be wrong though
The question is incomplete.
The complete question probably is
The pH scale for acidity is defined by pH = − log₁₀[H⁺] where [H⁺] is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pH of 2.55. Find the hydrogen ion concentration.
Answer: -
0.003 M
Explanation: -
pH = − log₁₀[H⁺]
Thus the hydrogen ion concentration [H⁺] = 
= 
= 0.003 M
According to the kinetic theory of gases, the force (per unit area) exerted by the atoms striking and rebounding from the surface of the gas container is assumed to be equal to the pressure.
According to the kinetic theory of gases, the force (per unit area) exerted by the atoms striking and rebounding from the surface of the gas container is assumed to be equal to the pressure. The assumption that matter is made up of microscopic particles that are always in motion forms the foundation of the kinetic-molecular theory, which explains the states of matter.
The observable characteristics and behaviours of solids, liquids, and gases are explained by this theory. The kinetic theory of gases has three primary parts, which are as follows: 1) Neither energy is gained nor lost when molecules collide. 2) In a container, the space occupied by gas molecules is extremely minimal. 3) These molecules move in a straight line at all times.
Learn more about kinetic theory of gases here;
brainly.com/question/15064212
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Answer:
nitrogen
Explanation:
The stoichiometry of the reaction says that 
and 
react 3:1 to form 2 moles of 
, so, if you have 3,5 moles of H, which is equal to 1,75 moles of , and 5 moles of N, which are equal to 2,5 moles of 
. only
=0.583 moles of , will react, leaving <em>1.917 moles of </em> <em>unreacted</em>, and forming 0.583*2=1.166 moles of
