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3 years ago

HELPPPPPPPPPPPPP ME PLSSSSSSSSSSS

Chemistry

1 answer:

Pani-rosa [81]3 years ago

6 0

Answer:

Option B: cooling as the lava runs down the mountain

Explanation:

The point R is basically at near the Earth's surface.

Now, we are told that rocks melt underground to form magma. This is a process of formation of igneous rocks. So, in formation of igneous rocks another process that will contribute to formation of rocks at point R is named cooling.

Cooling is a process where the larva runs down the mountain that makes magma hardened and makes it it turn into igneous rock.

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Angelina_Jolie [31]

Answer:

The question has some details missing. here are the details ; Given the following ;

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4. 150 g of iron. With density 79g/cm 3

5. 32 cm3 sample of gold with density 19.3 g/cm3

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Explanation:

Appropriate for calculating mass

32 cm3 sample of gold with density 19.3 g/cm3

18 ml of cooking oil with density 0.92 g/ml

Appropriate for calculating volume

5 g of balsa wood with density 0.16 g/cm3

150 g of iron. With density 79g/cm 3

Appropriate for calculating density

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3 0

3 years ago

Diatoms are made of _____, which is used for industrial processes. calcium chitin silica cellulose

Alla [95]

A characteristic feature of diatom cells is that they are encased within a unique cell wall made of silica (hydrated silicon dioxide) called a frustule.

5 0

3 years ago

Read 2 more answers

What is the difference between a theory and a law?

kondaur [170]

Answer:

theory is diffrent from law

Explanation:

a Theory can never be proven to be true nd a law can usually be expressed

3 0

3 years ago

Complete the transmutation equation below. Assume that there is only one unknown product. Np93239→Pu94239+?

aliya0001 [1]

I have attached the answer. hopefully, i read the problems correctly. let me know if I did not.

both problems are an example of beta decays. when an atoms' atomic number is increased by one. this is symbolized with -1 e

5 0

3 years ago

If 3.0 liters of oxygen gas react with excess carbon monoxide at STP, how many liters of carbon dioxide can be produced under th

mr_godi [17]

Answer:

The volume of CO2 produced is 6.0 L (option D)

Explanation:

Step 1: Data given

Volume of oxygen = 3.0 L

Carbon monoxide = CO = in excess

Step 2: The balanced equation

2 CO (g) + O2 (g) → 2 CO2 (g)

Step 3: Calculate moles of O2

1 mol of gas at STP = 22.4 L

3.0 L = 0.134 moles

Step 3: Calculate moles of CO2

For 2 moles CO we need 1 mol of O2 to produce 2 moles of CO2

For 0.134 moles O2 we'll have 2*0.134 = 0.268 moles CO2

Step 4: Calculate volume of CO2

1 mol = 22.4 L

0.268 mol = 22.4 * 0.268 = 6.0 L

The volume of CO2 produced is 6.0 L

8 0

4 years ago