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Iteru [2.4K]
4 years ago
14

Please help i will reward brainly! ASAP

Chemistry
1 answer:
Svet_ta [14]4 years ago
7 0
I believe the correct answer is Newtons hope this helps:)
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How many atoms are found in a 15.5 g sample of bismuth?
r-ruslan [8.4K]

Answer:

4.47 x 10²² atoms

Explanation:

Given parameters:

Mass of Bismuth  = 15.5g

Unknown:

Number of atoms  = ?

Solution:

To find the number atoms, first solve for the number of moles in this element first.

  Number of moles  = \frac{mass}{molar mass}    

  Number of moles  = \frac{15.5}{209}    = 0.074mole

So:

        1 mole of a substance contains 6.02 x 10²³ atoms

     0.074 mole of Bismuth will contain 0.074 x 6.02 x 10²³ atoms

                                                          = 4.47 x 10²² atoms

6 0
3 years ago
Conduction is the main method of heat flow in a metal. <br> a. True<br> b. False
andreev551 [17]
In the process of transmission of heat by conduction, a transfer of thermal agitation of particles from a region of higher temperature to one of lower temperature. This is only possible in <span>materials.

True . answer A

hope this helps!</span><span />
6 0
3 years ago
3.0 L of a gas has a temperature of 78 C find the volume of the gas at standard temperature
jeka57 [31]

Answer:

= 2.33 L

Explanation:

V1/T1 = V2/T2

V1 = 3.0 L

T1 = 78 + 273

   = 351 K

At s.t.p the temperature is 273 K and pressure is 1 atm.

V2 = ?

T2 = 273 K

V2 = V1T2/T1

    = (3.0 ×273)/351

    = 2.33 L

Explanation:

ik it is confusing but that is what i got

4 0
3 years ago
Read 2 more answers
What element has the same amount of valence electrons as neon?<br> -KDM
Darya [45]

Answer:

Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.

Explanation:

3 0
3 years ago
Read 2 more answers
If ethanol has a density of 0.785g/mL, calculate the volume of 83.7 g of ethanol.
ratelena [41]

Answer:

<h2>106.62 mL</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 83.7 g

density = 0.785 g/mL

We have

volume =  \frac{83.7}{0.785}  \\  = 106.62420

We have the final answer as

<h3>106.62 mL</h3>

Hope this helps you

8 0
3 years ago
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