PLSSSSSSSSSSSSSSSSSSSSSSSSSS HELP Which of the following best describes physical weathering? (4 points)
A series of chemical changes that wears away at rocks
The movement of rocks from one area to another
Any large-scale event such as volcanic eruptions or earthquakes
A process that breaks down large rocks into smaller piec

Answers

Answer 1

Answer:

Answer:

D. A process that breaks down large rocks into smaller pieces.

Explanation:

Physical weathering if referred to the process of rocks breaking apart without changing their chemical composition. If you look at the other answers, none of them match the description of physical weathering.

Answer 2

Answer:

Answer:

A process that breaks down large rocks into smaller pieces.

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A substance conducts an electric current when it is in the liquid state. What would the conductivity of the substance in solid form indicate about the type of bond in the substance?A.) If the solid is conductive, the bonds are ionic.B.) If the solid is not conductive, the bonds are covalent.C.) If the solid is conductive, the bonds are metallic.D.) If the solid is not conductive, the bonds are metallic.
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What is global warming? a) a recent increase in the average global temperature near Earth’s surface
b) a period of time when temperatures across the planet are colder than normal
c) a characteristic of summer that returns seasonally
d) the gain of heat in coastal areas from El Niño storms

Answers

Global Warming is a gradual increase in the overall temperature of the earth's atmosphere.

So, i believe the answer to your question would be a) a recent increase in the average global temperatures near Earth's surface

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Which of the following quantities is the largest?0.00001101 kg
0.001011 g
0.000001101 kg
0.0001011 g

Answers

For this case, the first thing we are going to do is convert all the numbers to the same unit.

For this, we use the following conversion:

1 Kg = 1000 g

We then have the following numbers:

1) 0.00001101 kg = (0.00001101) * (1000) = 0.01101 g

2) 0.001011 g

3) 0.000001101 kg = (0.000001101) * (1000) = 0.001101 g

3) 0.0001011 g

Therefore, the largest amount in grams is:

0.01101 g

Answer:

0.00001101 kg = 0.01101 g

option 1

A is the Largest I believe

1) El hierro tiene de número atómico 26 y de número másico 55. Las partículas del átomo neutro son:a. Número de protones _______________
b. Número de electrones _______________
c. Número de neutrones _______________

Answers

a. Número de protones es veintiseis
b. Número de electrones es treinta
c. Número de neutrones es veintiseis

Why does a reaction slow down with time?

Answers

As a reaction proceeds the concentration of the reactants will get lower. Since reactions occur due to collisions that are in the correct orientation and lower concentrations leads to a lower amount of collisions, lower concentrations result in lower reaction rates. I hope this helps. Let me know if anything is unclear.

8.00*10^-5 mol was diluted to 500ml what is the concentration in Mol/L?

Answers

Make sure all units are consistent. Convert ml to L first. (500ml = 0.5L). Then divide the mole by the volume which would result to 1.6*10^-4mol/L. This can also be expressed as interms of molarity (M). 1 M = 1 mol/L hence the final answer is 1.6*10^-4 M.

Answer : The concentration in mol/L is $1.6* 10^(-4)mol/L$

Explanation : Given,

Moles = $8.00* 10^(-5)mol$

Volume of solution = 500 mL

Formula used :

$\text{Concentration}=\frac{\text{Moles of solute}* 1000}{\text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Concentration}=(8.00* 10^(-5)mole* 1000)/(500mL)=1.6* 10^(-4)mol/L$

Therefore, the concentration in mol/L is $1.6* 10^(-4)mol/L$

A person’s blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasmawith potassium dichromate solution. The balanced equation is:

16 H+ (aq) + 2 Cr2O7 2-(aq) + C2H5OH (aq) ? 4 Cr3+ (aq) + 2 CO2 (g) + 11 H2O (l)

If 35.46 mL of 0.05961 M Cr2O7 2-
is required to titrate 28.00 g of plasma, what is the mass percent
of alcohol in the blood?

Answers

Answer:

0.17%

Explanation:

With the equation:

2Cr2O7 2- + C2H5OH + H2O --> 4Cr3+ + 2CO2 + 11H2O

We can assume that every mole of ethanol needs 2 moles of Dichromate to react.

So if in 1L we have 0.05961 moles of dichromate we can discover how many moles we have in 35.46mL

1000 mL - 0.05962 moles

35.46 mL - x

x = $(0.05962 * 35.46)/(1000)$

x = 2,11* 10^-3 moles

As we said earlier, 1 mole of ethanol needs 2 mole of dichromate, so in the solution we have 1,055*10^-3 moles of ethanol. We can discover the mass of ethanol present in the solution.

1 mole - 46g

1.055*10^-3 - y

y = 46 * 1.055*10^-3

y = 0.048 g

To discover the percent of alchol we can use a simple relation

28 g - 100%

0.048 - z

z = $(0.048 * 100)/(28)$

z = 0.17%

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