Look at the reaction below.

Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper Upper M g (s) right arrow Uper M g upper S upper O subscript 4 (a q) plus upper H subscript 2 (g).

Which substance is the acid in the reaction?
Mg(s)
H2(g)
MgSO4(aq)
H2SO4(aq)

Answer: The answer is A

im 86% sure

Answer: 40mL

Explanation: it has a pH of 7. Seven defines the most neutral value on the pH scale.

The list that correctly shows units of a single organ system, in order from the smallest unit to the largest unit of organization is as follows: hepatic cell, liver tissue, liver, digestive system.

The level of organization of life shows the hierarchical arrangement of the components that make up life.

The levels of organization are as follows:

Therefore, the list that correctly shows units of a single organ system, in order from the smallest unit to the largest unit of organization is as follows:

hepatic cell, liver tissue, liver, digestive system

Learn more about level of organization at: https://brainly.com/question/14501995

Answer:

7. Option 2. Atom 1 and Atom 4

8. The same number of valence electron

Explanation:

7. Determination of which symbol represent an isotope.

Isotopes are atoms having the same atomic number but different mass number due to the difference in the neutron number.

From the question given above, the following were obtained:

Z => atomic number

A => mass number

Atom >>> Isotope >>>>> Z >>>> A

1 >>>>>>> ¹⁷₇E >>>>>>>> 7 >>>> 17

2 >>>>>>> ¹⁷₈E >>>>>>> 8 >>>> 17

3 >>>>>>> ¹⁸₆E >>>>>>> 6 >>>> 18

4 >>>>>>> ¹⁸₇E >>>>>>> 7 >>>> 18

From the table above, only atom 1 and 4 has the same atomic number. Hence, atom 1 and atom 4 are isotopes.

8. To know the correct answer to the question, we shall write the electronic configuration of magnesium and calcium. This can be obtained as follow:

Mg (12) => 1s² 2s²2p⁶ 3s²

Valence electron => 2

Ca (20) => 1s² 2s²2p⁶ 3s²3p⁶ 4s²

Valence electron => 2

We can see that magnesium and calcium both have the same valence electron. Hence, they will have similar chemical properties.

Answer:

Sodium hydrogen trioxocarbonate(IV) is also known as baking soda, and has the molecular formula NaHCO3. Industrial Preparation of NaHCO3. The salt is manufactured industrially by the solvay process by saturating a wet mush of Na2CO3 obtained from the solvay process with CO2. Na2CO3(aq) + H2O(l) + CO2(g) → 2NaHCO3(s)

Explanation:

Hope it helps

FOLLOW MY ACCOUNT PLS PLS

Answer: B

Explanation:

1.5 :D

Answer:I’m 100% it’s the second one

Explanation:

I have done it before and missed one but not this question

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

we have

[tex]n = \frac{1.88 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 31.229235...[/tex]

We have the final answer as

Hope this helps you

Explanation:

Explanation:

Given the molecular weights:

M

r

N

a

O

H

=

40

g

m

o

l

M

r

N

a

2

S

O

4

=

142

g

m

o

l

The analogy of the moles will be held constant:

n

N

a

O

H

n

N

a

2

S

O

4

=

2

1

n

N

a

O

H

n

N

a

2

S

O

4

=

2

For each one, substitute:

n

=

m

M

r

Therefore:

n

N

a

O

H

n

N

a

2

S

O

4

=

2

m

N

a

O

H

M

r

N

a

O

H

m

N

a

2

S

O

4

M

r

N

a

2

S

O

4

=

2

200

40

x

142

=

2

200

⋅

142

40

x

=

2

200

⋅

142

=

2

⋅

40

x

x

=

200

⋅

142

2

⋅

40

=

100

⋅

142

40

=

10

⋅

142

4

=

1420

4

=

=

710

2

=

355

g

r

a

m

s

(or just use a calculator

Answer:

D

Explanation:

Explanation:

but carbon has four Valence Electrons

The required molecule is :

=》option B.) C2H4O2

it has 2 carbon atoms, 4 hydrogen atoms which it twice the number of carbon atoms and 2 oxygen atoms same as carbon.

Hamburger

Explanation: I ate a hamburger yesterday and methane came out my butt

Answer:

A convex mirror

Explanation:

Good luck on the test m8!

A convex mirror could have resulted in the image of the giraffe above. A mirror is a surface which reflects almost all types of light that strike it

A mirror is a surface which reflects almost all types of light that strike it, according to physics. Furthermore, unless or until an opaque item is placed between both the reflecting surface as well as the source of light, a mirror will continue to reflect light in a regular manner.

In actuality, the reflection principle underlies how mirrors function. As far as we are aware, light is either reflected or absorbed. Whenever a mirror is present, light is reflected. Because a mirror has a flat surface just at microscopic level, light is reflected when it strikes one. A convex mirror could have resulted in the image of the giraffe above.

Therefore, a convex mirror could have resulted in the image of the giraffe above.

To learn more about mirror, here:

https://brainly.com/question/8512677

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Answer:

In short, because we are tearing up the oxygen factories to make way for carbon dioxide emitters. (Doesn't make a lot of sense, read the explanation)

Explanation:

So, 1000 years ago, we had a lot more trees, didn't have engines or cars or factories or anything, really that released carbon dioxide into the air and we had a lot more trees and since the invention of cars, engines, carbon dioxide-emitting tools and factories and all the other things that emit "Greenhouse gases" and in doing that, cleared more trees to make room for factories and roads and that has drastically changed the outlook of the carbon cycle.

Answer: FALSE

Explanation:

Answer:

limited

Explanation:

have a good day :)

Answer:

wavelength is inversely proportional to frequency.

frequency determines pitch of sound.

we hear sound differently.

when the wavelength or distance is short we Hear high sound .

when the wavelength or distance is high we Hear low sound .

Answer:

k,39

Explanation:

Is the answer

Answer:

350.64g

Explanation:

So first you must know that M is mol/L

Next solve the problem using dimensional analysis

2L NaCl (3 mol/L) = 6 mol NaCl

After you got the number of moles you should look at your periodic table to find the molar mass

I see that it's 58.44g/mol

Use dimensional analysis again!

6 mol (58.44g/mol) = 350.64g

Don't forget to make me brainliest!

Answer:

Who's number is it LOL

Explanation:

Answer:

okay

Explanation:

Answer:

Explanation:

"Oxygen fuels our living processes. It contracts our muscles, helps our cells to work, grow and regenerate, feeds our brains, calms our nerves, helps the heart to pump, cleanses the body of toxins, fights infection and boosts immunity," says Dr  Jena, Director, Institute of Emergency Medicine, Mission Hospital & Research Center , Madurai.

Lungs:

Once air enters the nose or mouth, it gets humidified and reaches the oliveoli, tiny air sacs that help to pull in oxygen and transfer it into the blood stream and also to pull out the carbon dioxide and push it out of the lungs and back up to breathe out.  destroys these oliveoli by thickening the walls so gas exchange becomes difficult.

Heart :

The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it gets rid of the carbon dioxide and picks up oxygen. Inan increase in oxygen demand occurs because of compromised lungs and fear (that excites the body). This may lead to heart damage, especially if the arteries were already clogged.

this may help you hope so

Answer:

2Li + 2H2O → 2LiOH + H2

Explanation:

Lithium + Water = Lithium Hydroxide + Dihydrogen

Answer:

4.46

Explanation:

Applying,

pH = -log(H⁺)....................... Equation 1

Where H⁺ = Hydrogen ion concentration of HCl solution

From the question,

Given: H⁺ =  3.5×10⁻⁵ M

Substitute these values into equation 1

pH = -log(3.5×10⁻⁵)

pH = 4.46

Hence the pH of HCl solution is 4.46

Answer:

Sulfur hexafluoride

Explanation:

Answer:

The correct answer is - 1/4096.

Explanation:

In the starting, there is that the number of atoms is  N 0 .

The number of half-lives in this case, = 300/ 25 = 12

After the first half-lives or 25 days,  N 1 = N 0 /2

the half life is that time where half of the sample had decay.

After the second half-life or 50 days,  N 2 = N 1 /2  = N 0 /4 .

There is division by two the original amount, then after four times you divide four times for  2  that means that you divide by  2 ^12  =4096 .

So the final amount remain is  N 12 = N 0 /4096  or 1/4096.

Answer:

C. volume

Explanation:

Answer:

2.8l

Explanation:

just make v2 de subject