2 years ago

(a) How many moles of CO2 contain 2.42 ✕ 1024 molecules?

1 answer:

4 0

Don’t currently have a calculator with me but just use Avogadros constant (A) 6.02x10^24, in the equation n=N/A. Lower case n being the number of mol and upper case being the number of molecules (given).

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If an element gives away an electron, will it form a positive ion or a negative ion?

Elan Coil [88]

Answer:

posotive

Explanation:

electrons give off negative pulse so take one away

8 0

3 years ago

4.60 mL of 0.1852 M HNO3 is titrated to the phenolphthalein indicator endpoint with 27.35 mL of a KOH solution. What is the mola

Kamila [148]

Answer:

$M_{base}=0.0311M$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve for the molarity of the KOH solution by knowing this base react in a 1:1 mole ratio with nitric acid, HNO3; thus, we can write the following equation, as their moles are the same at the endpoint:

$n_{acid}=n_{base}$