Ask question

Ask question

All categories

Irina-Kira [14]

3 years ago

11

Identical rock types, identical fossils, and very similar mountain ranges are found on different continents that are separated b

y a wide ocean. Which of these best explains these observations?

2 answers:

storchak [24]3 years ago

6 0

I can’t see the picture for some reason but if I were to guess, I would say Pangea.

enyata [817]3 years ago

3 0

I’m confused about this question

You might be interested in

How much 0.02 m kmno4 solution should be needed if the solutions tested have a composition of 3% h2o2 by mass?

Nostrana [21]

When the concentration is expressed in mass percentage, that means there is 3 g of solvent H₂O₂ in 100 grams of the solution. Then, that means the remaining amount of solute is 97 g. We use the value of molarity (moles/liters) to determine the amount of solution in liters, denoted as V. The solution is as follows:

0.02 mol KMnO4/L solution * 158.034 g KMnO4/mol * V = 97 g KMnO4

Solving for V,
V = 30.69 L

6 0

3 years ago

Botulism is a bacteria caused illness found in raw eggs. It causes diarrhea symptoms. The transmission of this disease would bes

Neporo4naja [7]

Answer:

It's C. Oral-fecal

Explanation:

I just got it right.

4 0

3 years ago

Read 2 more answers

When you blow dry your hair is it physical or chemical change

viva [34]

When you blow dry your hair you will get a physical change

8 0

4 years ago

Read 2 more answers

Which factors can influence the length of time it takes for a half-life to occur?

vovikov84 [41]

Answer:

the radioactive half-life of an atom can depend on how it is bonded to other atoms. by changing the neighboring atoms that are bonded to a radioactive isotope, we can change its half-life.

Explanation:

4 0

3 years ago

Consider the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g). If 0.02 moles of PCl5, 0.04 moles of PCl3, and 0.08 moles of Cl2 are combined

Furkat [3]

Answer:

The reaction quotient (Q) before the reaction is 0.32

Explanation:

Being the reaction:

aA + bB ⇔ cC + dD

$Q=\frac{[C]^{c} *[D]^{d} }{[A]^{a}*[B]^{b} }$

where Q is the so-called reaction quotient and the concentrations expressed in it are not those of the equilibrium but those of the different reagents and products at a certain instant of the reaction.

The concentration will be calculated by:

$Concentration=\frac{number of moles of solute}{Volume}$

You know the reaction:

PCl₅ (g) ⇌ PCl₃(g) + Cl₂(g).

So:

$Q=\frac{[PCl_{3} ] *[Cl_{2} ] }{[PCl_{5} ]}$

The concentrations are:

[PCl₃]= $\frac{0.04 moles}{0.5 L} =0.08 \frac{moles}{L}$

[Cl₂]= $\frac{0.08 moles}{0.5 L} =0.16 \frac{moles}{L}$

[PCl₅]= $\frac{0.02 moles}{0.5 L} =0.04 \frac{moles}{L}$

Replacing:

$Q=\frac{0.08*0.16}{0.04}$

Solving:

Q= 0.32

<u><em>The reaction quotient (Q) before the reaction is 0.32</em></u>

4 0

3 years ago