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gizmo_the_mogwai [7]
3 years ago
6

Which of the following statements best compares the pH value of H3PO4 and HCl?

Chemistry
1 answer:
wel3 years ago
5 0

Answer:

Option B. Both have a pH less than 7, but H3PO4 has a lower pH than HCl

Explanation:

Those are acid, so the pH would be < 7.

H₃PO₄ is a weak acid with 3 dissociations

HCl is a strong acid.

pH depends on [H]⁺

H₃PO₄  →  3H⁺  +  PO₄⁻³

HCl →  H⁺  +  Cl⁻

If both acid, have the same concentration, [H⁺]H₃PO₄ > [H⁺]HCl, that's why the pH from the phosphoric will be lower.

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The total number of protons and neutrons in the nucleus of an atom is called the___________
Helen [10]
This answer is nucleons
6 0
3 years ago
Near the shore, winds tend to blow out toward the water at night. What drives this process?
Mila [183]

C. Convection currents in the air

Explanation:

Near the shore, winds tends to blow out towards the water at night and this is driven by convection currents in the air.

Convection occurs in fluids. Since we are dealing with wind, therefore, it is convection in air.

  • At night, the air on land is cold and under high pressure.
  • The shore area is able lose and gain heat very fast.
  • At night, since the shore is cold, the air around is cold too.
  • The ocean has high heat capacity and does not lose or gain heat easily.
  • At night, it still retains come of its heat.
  • This causes nearby winds to warm up, becomes less dense and rises.
  • The wind here is moves towards the cold land
  • The breeze on land moves outwards towards the ocean.
  • This will then set up convection currents.

learn more:

Sun's energy brainly.com/question/1140127

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8 0
3 years ago
Which of the following describe chemical properties? check all that apply
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6 0
3 years ago
Using the potential given below, calculate the activity of cl^- in 1M KCl solution.
MissTica

Answer:

Explanation:

E° (calomel electrode) = 0.268 v

E( calomel electrode, 1M KCl) = 0.280 v

For calomel electrode

E = E^0 _( Hg^+/Hg ) - \frac{.059}{2} \times log( a_{cl^-} )^2

.280 = .268 - \frac{.059}{2} \times log( a_{cl^-} )^2

.012=  - \frac{.059}{2} \times log( a_{cl^-} )^2

log( a_{cl^-})^2= - .4067

a_{cl^-_}  = 0.626 .

3 0
3 years ago
Make a claim about why scientists might have two ways for thinking about Earth's layers. Summarize evidence to support the claim
amid [387]

Answer:

Direct evidence from rock samples and indirect evidence from seismic waves may account for why scientists have two ways of thinking about earth's layers

Explanation:

Scientists who study about the earth's structure and components called geologists have two main types of evidence to learn about Earth's interior namely

1. direct evidence from rock samples

2. indirect evidence from seismic waves

Direct evidence From Rock Samples

Scientists examine rocks from inside the Earth and these rocks give them clues about Earth’s structure. Some scientists have drilled holes as much as 12 kilometers into Earth and bring up samples of rock. From these samples, they can make inferences about conditions deep inside Earth, where these rocks formed. In addition, forces inside Earth sometimes blast rock to the surface from depths of more than 100 kilometers. These rocks from deep within the Earth provide more information about the interior.

Indirect evidence From Seismic Waves

Since scientist cannot look inside Earth, they have devised an indirect methods of observation by using seismic waves. When earthquakes occur, they produce seismic waves. Scientists record the seismic waves and study how they travel through Earth. The speed of seismic waves and the paths they take reveal the structure of the planet. Using data from seismic waves, scientists have learned that Earth’s interior is made up of several layers with each layer surrounding the layers beneath it.

6 0
3 years ago
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