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2 years ago

1) In what ways do the fossil types change as you get deeper in the fossil record?

Chemistry

1 answer:

rodikova [14]2 years ago

4 0

<h2>What are fossils?</h2>

Fossils are the remains or impression of plants or animal embedded in rock. They are the remains of dead animals and plants that once lived on this earth in the remote past. Fossils are formed when dead organisms are not completely decomposed.

<h3>2. Fossil record</h3>

The fossil records are referred to as the totality of fossils. It helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era. Fossil records can be used to show that organisms changed to meet new conditions

<h3>3. The grand staircase</h3>

The Grand Staircase is referred to as a sequence of sedimentary rock layers that stretch south for 100 miles from Bryce Canyon National Park through Zion National Park and into the Grand Canyon.

The different environmental conditions the Grand Staircase exposed to over this +1 Billion year is heat

4. Based on the Law of Superposition which states that in undisturbed rock sequences the bottom layers are older than the top layers.

Learn more about fossils:

brainly.com/question/2977553

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Which best defines a pioneer species?

Juli2301 [7.4K]

Answer: C (The first species to populate an uninhabited area)

Explanation:

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3 years ago

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What are the number of atoms in each Chemical Formula

podryga [215]

You can search that up online it’s not that hard but good luck !!

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3 years ago

Calculate the percent by volume of a solution that has 75 mL of solute dissolved in 375 mL of solution. Show your work and round

Mandarinka [93]

Answer:

The answer is 20 % V/V

Explanation:

We use this formula for calculate the %V/V:

%V/V= (ml solute/ml solution) x 100= (75ml/375 ml)x 100 = 20 % V/V

<em>The% V / V represents the amount of ml of solute dissolved in 100 ml of solution</em>

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4 years ago

Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an el

givi [52]

Answer: The amount of time needed to plate 14.0 kg of copper onto the cathode is 295 hours

Explanation:

We are given:

Moles of electron = 1 mole

According to mole concept:

1 mole of an atom contains $6.022\times 10^{23}$ number of particles.

We know that:

Charge on 1 electron = $1.6\times 10^{-19}C$

Charge on 1 mole of electrons = $1.6\times 10^{-19}\times 6.022\times 10^{23}=96500C$

$Cu^{2+}+2e^-\rightarrow Cu$

$2\times 96500=193000C$ is passed to deposit = 1 mole of copper

63.5 g of copper is deposited by = 193000 C

$14\times 1000g=14000g$ of copper is deposited by = $\frac{193000}{63.5}\times 14000=42551181 C$

To calculate the time required, we use the equation:

$I=\frac{q}{t}$

where,

I = current passed = 40.0 A

q = total charge = 42551181 C

t = time required = ?

Putting values in above equation, we get:

$40.0=\frac{42551181 C}{t}\\\\t=1063779sec$

Converting this into hours, we use the conversion factor:

1 hr = 3600 seconds

So, $1063779s\times \frac{1hr}{3600s}=295hr$

Hence, the amount of time needed to plate 14.0 kg of copper onto the cathode is 295 hours

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3 years ago

Chemicals are classified as health hazards when they pose which of the following hazardous effects?

AlexFokin [52]

Answer:

poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.

Explanation:

many hazardous chemicals are also classified as dangerous goods.

4 0

2 years ago