A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have

Response:The ethanol percentage is 0.1093%

As given:

t = time = 10 s

I = current = 320 mA

F = Faraday's constant = 96485.3365 C mol⁻¹

n = number of electrons transferred = 4

Molecular weight of ethanol is 46 g/mol

Question: What is the percent (by volume) of ethanol in the driver's breath, %E =?

First, calculate the ethanol mass:

The moles of ethanol:

Applying the ideal gas law formula:

Here:

T = 26°C = 299 K

P = 1 atm

Substituting in the values:

The percentage of ethanol:

%

Answer:

Quantity of generated will be reduced to fifty percent of its initial amount.

Explanation:

Equilibrium reaction:

In accordance with the balanced equation, 1 mol of HCl interacts with 1 mol of NaOH leading to the formation of 1 mol of

0.5 mol of HCl interacting with 0.5 mol of NaOH yielding 0.5 mol of .

Consequently, it is clear that the total of produced will be halved if the quantities of the reactants are halved.

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.