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blagie [28]
3 years ago
8

A silicon atom has an atomic number of 14. What information does the atomic number tell you? (Choose all possible answers)

Chemistry
1 answer:
Bezzdna [24]3 years ago
5 0

Answer:

Silicon atoms have 14 protons.

Silicon atoms will react with other atoms in order to gain stability.

Silicon atoms have 14 electrons.

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PLEASEE HELPPP<br> what is the ph of 1.0 times 10^-2 M HBr
mariarad [96]

Answer:

The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).

Explanation:

8 0
2 years ago
5. Uranium has three common isotopes. If the abundance of 2U which has an atomic mass of 233.878 amu is 0.01%, the
Temka [501]

Uranium has three common isotopes. The average atomic mass of uranium is 23.7 u/atom.

<h3>What are isotopes?</h3>

Isotopes are similar elements that have a different number of protons.

Uranium has three isotopes

The abundance of 2U has an atomic mass of 233.878 is 0.01%

The abundance of U has a mass of 234.892 amu is 0.71%

The **U has an atomic mass of 237.911 amu is 99.28%

Let's assume we have 10 000 atoms of Uranium

Mass of the 0.01 atoms = 0.01 x 233.878 = 2.33878

Mass of the 0.71 atoms =  0.71 x 234.892 = 166.773

Mass of the 99.28 atoms = 99.28 x 237.911 = 23,619.80

2.33878 + 166.773 + 23,619.80 = 23,788.8

23,788.8 / 1000 = 23.7 u/atom

Thus, the average atomic mass of uranium is 23.7 u/atom.

To learn more about average atomic mass, refer to the link:

brainly.com/question/12971445

#SPJ1

4 0
1 year ago
20 milliliters of water are poured into a graduated cylinder. A sample of metal is added. The water rises to the 32-milliliter l
Sindrei [870]

Answer:

12

Explanation:

32-20= 12

This is because when the metal is added it adds to the volume of the liquid hence to find the metal itself subtract the final volume from Intel volume

5 0
3 years ago
Read 2 more answers
What substance(s) do you predict will be able to diffuse through the cell membrane and why?
vovangra [49]

Consider substances that can easily diffuse through the lipid bilayer of the cell membrane, such as the gases oxygen (O2) and carbon dioxide (CO2). These small, fat soluble gasses and other small lipid soluble molecules can dissolve in the membrane and enter or exit the cell following their concentration gradient.

8 0
2 years ago
In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a metal.
HACTEHA [7]

Answer : The specific heat of tungsten is, 0.139J/g^oC

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

q_1=-q_2

m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)

where,

c_1 = specific heat of tungsten = ?

c_2 = specific heat of water = 4.18J/g^oC

m_1 = mass of tungsten = 19.5 g

m_2 = mass of water = 78.5 g

T_f = final temperature = 23.20^oC

T_1 = initial temperature of tungsten = 97.80^oC

T_2 = initial temperature of water = 22.58^oC

Now put all the given values in the above formula, we get

19.5g\times c_1\times (23.20-97.80)^oC=-78.5g\times 4.18J/g^oC\times (23.20-22.58)^oC

c_1=0.139J/g^oC

Therefore, the specific heat of tungsten is, 0.139J/g^oC

8 0
3 years ago
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