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taurus [48]
3 years ago
10

1. How many molecules are in 4.5 moles?

Chemistry
1 answer:
Naily [24]3 years ago
6 0

Answer:

2.4 ⋅ 10 24

Explanation:

All that you need to know here is that in order for a given sample of water to contain exactly  1  mole of water, it must contain  6.022 ⋅ 10 23  molecules of water.

This is known as Avogadro's constant and essentially acts as the definition of a mole. If you have  6.022 ⋅ 10 23  molecules of water, then you can say for a fact that you have  1  mole of water.

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Emma constructed a simple motor. When connected correctly, the coil of copper wire spins. Which of the following best describes
faltersainse [42]

Answer:

ok first your in my class and second im stuck too

Explanation:

3 0
3 years ago
What will occur when potassium reacts with sulfur?
sveticcg [70]
The electrons are transferred from potassium to sulphur, in this reaction, potassium is being oxidised and sulphur is being reduced. Two potassium atoms each lose one electron forming K+ ions. Sulphur gains two electrons forming S2-/2- ions. The resultant formula will be: K2S, bonding in this compound is ionic.
4 0
2 years ago
You have 28.5 g of iron shot that has a volume of 3.60 mL. From this information, calculate the density of iron.
laila [671]

Answer:

\boxed {\boxed {\sf \rho \approx 7.917 \ g/mL}}

Explanation

Density can be found by dividing the mass by the volume.

\rho=\frac{m}{v}

We know the iron sheet has a mass of 28.5 grams and the volume is 3.60 milliliters.

m= 28.5 \ g \\d= 3.60 \ mL

Substitute the values into the formula.

\rho=\frac{28.5 \ g}{ 3.60 \ mL}

Divide.

\rho = 7.91666667 \ g/mL

Let's round to the nearest thousandth.

The 6 in the ten-thousandth tells us to round the 6 to a 7.

\rho \approx 7.917 \ g/mL

The density of iron is about <u>7.917 grams per milliliter.</u>

8 0
3 years ago
Which of the following is NOT a fate for pyruvate?
son4ous [18]

Answer: The conversion to malate  

Explanation:

Pyruvate is the process which produced in glycoysis which has multiple fates and it can give rises to acetyl co-enzyme and undergo the aerobic oxidation in the critic acid cycle. It can be used to produces glucose but it never produced the malate. In prokaryotes it can be processes in the anaerobic respiration to produced the ethanol, as end product.

6 0
3 years ago
How many molecules of N204 are in 85.0 g of N2O4?
alukav5142 [94]

Answer:

5.56 × 10^23 molecules

Explanation:

The number of molecules in a molecule can be calculated by multiplying the number of moles in that molecule by Avagadro's number (6.02 × 10^23)

Using mole = mass/molar mass

Molar mass of N2O4 = 14(2) + 16(4)

= 28 + 64

= 92g/mol

mole = 85.0/92

= 0.9239

= 0.924mol

number of molecules of N2O4 (nA) = 0.924 × 6.02 × 10^23

= 5.56 × 10^23 molecules

4 0
3 years ago
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