Answer:
2.5 g of platinum
Explanation:
A catalyst is a substance added to a reaction to enhance the reaction speed. It does not undergo any change during the reaction, meaning it remains unchanged after the reaction concludes. The role of a catalyst is to provide an alternative pathway for the reaction by reducing the activation energy required. Therefore, a catalyzed reaction occurs more rapidly and requires less energy compared to an uncatalyzed one.
Since catalysts do not get involved in reactions and retain their mass post-reaction, the amount of platinum will stay the same (2.5g). The mass can only alter if a substance participates in the chemical process. Thus, this is the response.
Every unicellular organism prospers by executing metabolic activities.
Metabolic activities encompass the set of chemical reactions essential for sustaining life.
Explanation:
Different metabolic pathways maintain an organism's viability. Various metabolic activities occur in all living organisms.
These include processes like cellular respiration, reproduction, excretion, and digestion. Each living cell engages in these activities to survive.
Organisms acquire the energy necessary for these activities through food consumption.
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Convert HCl and H2O to moles.
36.0 g of HCl = 0.987 moles HCl
98.0 g of H2O = 5.44 moles H2O
Based on the stoichiometric ratio for HCl,
there are 0.987 moles of H and 0.987 moles of Cl.
For H₂O, according to the stoichiometric ratio, you have 10.88 moles of H and 5.44 moles of O.
Combining them:
11.867 moles H
0.987 moles Cl
5.44 moles O
Revert the moles back to grams, then divide by the total mass and multiply by 100 for the percentage by mass.
11.867 moles H = 11.96 g H
0.987 moles Cl = 34.99 g Cl
5.44 moles O = 87.03 g O
11.96/(36.0+98.0)(100) = 8.93% for H
34.99/(36.0+98.0)(100) = 26.11% for Cl
87.03/(36.0+98.0)(100) = 64.96% for O.
Answer:
To break a single I-I bond, the wavelength of light required is 7.92 × 10⁻⁷ m
Explanation:
The energy needed to break one mole of iodine-iodine single bonds is 151 KJ
The energy necessary to rupture one iodine-iodine bond is calculated as (151 KJ/mol) / 6.02 × 10²³/mol = 2.51 × 10⁻²² KJ
or
2.51 × 10⁻¹⁹ J
Formula:
E = hc / λ
Where h is Planck's constant = 6.626 × 10⁻³⁴ js
c is the speed of light = 3 × 10⁸ m/s
λ
= wavelength
Solution:
E = hc / λ
λ = hc / E
λ = (6.626 × 10⁻³⁴ js × 3 × 10⁸ m/s ) / 2.51 × 10⁻¹⁹ J
λ = 19.878 × 10⁻²⁶ j.m / 2.51 × 10⁻¹⁹ J
λ = 7.92 × 10⁻⁷ m
Answer:
Ir(NO2)3
Explanation:
The molar mass is 330.2335, in case that's also required.
