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sertanlavr [38]

3 years ago

13

A boulder sits at rest on top of a mountain. What conclusion can be made about the forces acting on the boulder

1 answer:

Stells [14]3 years ago

3 0

Explanation:

Since, the boulder is at rest. This means that there is an equilibrium of forces acting on the boulder.

According to principle of equilibrium of forces a body can be in position of rest only when net force acting on body is zero for translation equilibrium and net moment acting on the body must also be zero for rotational equilibrium.

Therefore, net forces and net moment acting on the boulder is zero.

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Why does bromine not react with aqueous potassium chloride

rusak2 [61]

Hey there,
That is because, chlorine is more reactive than Bromine.

**Important note: The lower you go in the periodic table of elements, the less reactive the elements become.

Hope this helps :))

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8 0

3 years ago

Explain what is wrong with the following Lewis Dot diagram?

spayn [35]

Answer:

you need to move one of the dots from Ca to the one at Cl like the arrows show

Explanation:

7 0

3 years ago

Compare 1 mole of H2, 1 mole of O2 and 1 mole of F2

likoan [24]

Explanation:

(a) As per the mole concept, one mole of any atom contains $6.022 \times 10^{23}$ atoms or molecules, that is, Avogadro's number of atoms.

Therefore, 1 mole of $H_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

1 mole of $O_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

1 mole of $F_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

Hence, there are equal number of molecules present in the given atoms.

(b) Mass of each given atom will be calculated as follows.

Mass = no. of moles × molar mass

As one molecule of $H_{2}$ contains 2 atoms of hydrogen.

So, mass of 1 mole of $H_{2}$ = $2 mol \times 1.008 g/mol$

= 2.016 g

mass of 1 mole of $O_{2}$ = $2 mol \times 15.999 g/mol$

= 31.996 g

mass of 1 mole of $F_{2}$ = $2 mol \times 18.998 g/mol$

= 37.996 g

Thus, we can conclude that $F_{2}$ has the greatest mass.

8 0

4 years ago

Measuring Physical Properties Lab Report Instructions: In the Physical Properties lab, you will test the physical properties of

fenix001 [56]

Answer:

I do flvs to

Explanation:

7 0

3 years ago

Read 2 more answers

2) What is the concentration of NaCl in a solution prepared by diluting 56.98 ml of 0.5894 M stock

RSB [31]

Answer:

The NaCl concentration will be 0.03 M.

Explanation:

Given data:

Initial volume = V₁ = 56.98 mL (56.98/1000 = 0.05698 L)

Initial concentration = M₁= 0.5894 M

Final volume = V₂= 1.20 L

Final concentration = M₂= ?

Solution:

By diluting the solution volume of solution will increase while number of moles of solute remain the same.

Formula:

Initial concentration × Initial volume = Final concentration × Final volume

M₁V₁ = M₂V₂

M₂ = M₁V₁ / V₂

M₂ = 0.5894 M × 0.05698 L / 1.20 L

M₂ = 0.0336 M /1.20

M₂ = 0.03 M

3 0

4 years ago