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juin [17]
3 years ago
12

What is the mass of calcium in 2.3•10^23 molecules of calcium phosphate

Chemistry
1 answer:
Katena32 [7]3 years ago
3 0

Explanation:

N(Ca)=3×N(Ca₃(PO₄)₂)=

=3×2.3×10²³=6.9×10²³

6.02×10²³→40g

6.9×10²³→Xg

m(Ca)=X≈45.85g

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3 years ago
And experiment a student measures the speed of a toy car locations K through N as it rolls down a ramp based on the data collect
valentina_108 [34]

Answer:

B) The average speed of the car increases as distance traveled increases.

Explanation:

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4 years ago
Describe what a mole is -- its value, its uses, the general concept.
Anna [14]
A mole is the assemblage of 6.022×10^23 ions.This number is also known as Avogadro Number.

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5 0
3 years ago
How much heat in joules and in calories is required to heat at 28.4g( 1 oz) ice cube from -23C TO 1.0C
Tom [10]

1426.58 J  and 340.90 calories heat in joules and in calories is required to heat at 28.4g( 1 oz) ice cube from -23C TO 1.0C.

Explanation:

Data given:

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initial temperature = -23 degrees

final temperature = 1degress

change in temperature  ΔT = Tfinal - Tinitial

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Formula used:

q = mc ΔT

putting the values in the equation:

q= 28.4 x 2.093 x 24

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ENERGY IN CALORIES:

340.90 calories is the energy is required in the process.

3 0
3 years ago
4. How many moles are in 9.12 x 1023 molecules of sugar? And I want the steps to so that I can understand better
Aleksandr-060686 [28]

Answer:

Step 1: List the known quantities and plan the problem.

Known

number of C atoms = 4.72 × 10 24

1 mole = 6.02 × 10 23 atoms

Unknown

4.72 × 10 24 = ? mol C

One conversion factor will allow us to convert from the number of C atoms to moles of C atoms.

Step 2: Calculate.

 

4.72 times 10^{24} text{atoms C} times frac{1  text{mol C}}{6.02 times 10^{23} text{atoms C}}=7.84  text{mol C}

Step 3: Think about your result.

The given number of carbon atoms was greater than Avogadro’s number, so the number of moles of C atoms is greater than 1 mole.  Since Avogadro’s number is a measured quantity with three significant figures, the result of the calculation is rounded to three significant figures.

Explanation:

the image is 4 step2 mwa

7 0
3 years ago
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