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4 years ago

Give two reason (evidence) Why we think the Earth's outer core is liquid

1 answer:

mihalych1998 [28]4 years ago

5 0

The outer-core temperature has exceeded the melting point of iron/nickel, which is a function of pressure casing it to be liquid

that's the only reason I got. sorry!

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Automobile airbags inflate due to the formation of nitrogen gas from the chemical reaction 2NaN3(s)⟶3N2(g)+2Na(s) Identify the n

Vera_Pavlovna [14]

First part:

2 atoms of Na

6 atoms of N

Second part:

2 atoms of N

2 atoms of Na

Why?

We are given the chemical reaction, so, we can extract the number of atoms for both reactants and products.

We are given the chemical equation:

$2NaN_{3}=3N_{2}+2Na$

We can rewrite it as follow:

$2(NaN_{3})=3N_{2}+2Na$

From the reactants, we have:

$2(NaN_{3})$

$2Na=2atoms\\2N_{3}=2*3=6atoms$

From the products we have:

$3N_{2}+2Na$

$3N_{2}=3*2=6atoms$

$2Na=2atoms$

Hence, we have that:

There are 6 atoms of N in the reactants and 6 atoms of N in the products.

and

There are 2 atoms of Na in the reactants and 2 atoms of Na in the products since we have a balanced equation.

Have a nice day!

6 0

3 years ago

Ammonia, chlorine and hydrogen chloride cannot be collected by displacement of water. Why?

Archy [21]

Answer:

Yes

Explanation:

Because they are lighter than water

4 0

3 years ago

6) What types of atomic orbitals are in the third principal energy

Bumek [7]

Answer:

Types of atomic orbitals present in the third principal energy are s, p and d only .

Explanation:

OPTION A-: s and p atomic orbitals - these two orbitals are present in second principal energy level. Therefore , the option is incorrect.

 OPTION B-: p and d only - This option is wrong as there is no such principal level energy where , s atomic orbital is absent .

OPTION C-: s , p and d only -these orbitals are present in third principal energy level. The third major level of energy has one orbital, three orbitals of p, and five orbitals of d, each of which can contain up to 10 electrons. The third stage thus holds a maximum of 18 electrons. This option is correct .

OPTION D-: s , p, d and f only -There is also a f sublevel at the fourth and higher stages, containing seven f orbitals, which can accommodate up to 14 electrons at most. Therefore, up to 32 electrons will hold the fourth level: 2 in the s orbital, 6 in the three p orbitals, 10 in the five d orbitals, and 14 in the seven f orbitals. This option is incorrect .

Thus , the correct option is C (s , p and d only .)

6 0

4 years ago

Calculate the mass of water produced when 1.36 g of butane reacts with excess oxygen.

ANTONII [103]

Answer:

Mass of water produced= 1.8 g

Explanation:

Given data:

Mass of water produced = ?

Mass of butane = 1.36 g

Mass of oxygen = excess

Solution:

Chemical equation:

2C₄H₁₀ +13 O₂ → 8CO₂ + 10H₂O

Number of moles of butane:

Number of moles = mass/molar mass

Number of moles = 1.36 g/ 58.12 g/mol

Number of moles = 0.02 mol

Now we will compare the moles of butane with water.

C₄H₁₀ : H₂O

2 : 10

0.02 : 10/2×0.02 = 0.1 mol

Mass of water produced:

Mass = molar mass × molar mass

Mass = 0.1 mol × 18 g/mol

Mass = 1.8 g

6 0

3 years ago

Make a connection between bacteria and extreme environment

Ugo [173]

One example of bacteria that live in an extreme environment are the thermophilic species that live in the hot springs of Yellowstone National Park. Thermophilic means heat-loving and the waters in which these bacteria live can rise above 70 degrees Celcius after being heated by lava below the surface. Most life would die at that temperature however some bacteria have evolved to survive the extreme heat.

3 0

3 years ago