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Rom4ik [11]
4 years ago
7

Which season will the northern hemisphere experience if the axis of Earth is tilted away from the sun?

Chemistry
1 answer:
Alex787 [66]4 years ago
3 0
The Answer is Summer
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Ice floats on water. For most other substances, however, the solid sinks in the liquid. Classify each of these statements based
sattari [20]

Answer:

1.High pressure will cause the liquid to become solid :

<u>Describe both water and other substances</u>

2.High pressure will cause the solid to become liquid <u>:</u>

<u>It describe none : neither water nor other substances </u>

<u>This statement is :False for both water and other substances</u>

3.The solid is more dense than the liquid :

It describe other substance

<u>This statement is :False for water but true for other substances.</u>

4. In a phase diagram, the solid-liquid coexistence line has a negative slope.

It describes water:

<u>This statement is :True for water because solid ice is less dense than liquid water.</u>

<u>False for other substance, they have positive slope</u>

5.The molecules are closest in the liquid phase.

<u>This statement is :False for water and other substances </u>

6.The solid is less dense than the liquid:

It Describes water because ice is less dense than liquid water

7. In a phase diagram, the solid-liquid coexistence line has a positive slope.

It describe other substances

<u>This statement is :True for other substances  but false for water</u>

8. The molecules are closest in the solid phase :

<u>Describes both water and other substances </u>

Explanation:

<u>Answers to statement 1 , 2,5 and 8</u>

<u>Answers to statement 1 , 2</u>

On increasing pressure and decreasing temperature , There occur<u> Phase transition</u> always for every substance :

From liquid to solid and gas to liquid

Hence,

In Both for water and other substance

<u>High pressure will cause the liquid to become solid.</u>

<u>Answers to statement 5,8 :</u>

2.The Particles of solid are closely packed hence there is maximum force of attraction between the particle of solid as compared to liquid and gases .

Hence , The molecules <u>of both water and other substance</u>s are closest in the solid phase

This also means that in liquid molecules are far apart .

Rest statement : 3, 4 ,6 ,7 are explained below(see attached image)

<u>The molecules are closest in the liquid phase is false statement  and does not describe both water and other substance</u>

<u>Ice floats on water. For most other substances, however, the solid sinks in the liquid.</u>

This can be explained using the phase diagram of <u>water </u>:

The line DB is  = the solid-liquid coexistence line

It has negative slope because , solid ice is less dense than liquid water . That is why ice floats on water because its density is less than water

Hence <u>Water is described truly by statement 4,6, </u>which are :

4. the solid-liquid coexistence line has a negative slope.

6.The solid is less dense than the liquid.

Rest 3,7 = describe by other substance

<u>other substance</u> : Solid  is more dense than the liquid ,the solid-liquid coexistence line has a positive slope

7 0
3 years ago
Which of the following is not a type of mechanical wave?
Otrada [13]
Concave is not a type of mechanical wave because it doesn’t need a medium for propagation.
3 0
3 years ago
Read 2 more answers
What is the correct order of the steps in the scientific<br> method?
Gnom [1K]

Answer:

Make an observation.

Ask a question.

Form a hypothesis, or testable explanation.

Make a prediction based on the hypothesis.

Test the prediction.

Iterate: use the results to make new hypotheses or predictions.

Explanation:

7 0
3 years ago
How many milliliters of a 0.285 M HCl solution are needed to neutralize 249 mL of a 0.0443 M Ba(OH)2 solution?
meriva

Answer:

\large \boxed{\text{77.4 mL}}

Explanation:

                Ba(OH)₂ + 2HCl ⟶ BaCl₂ + H₂O

    V/mL:     249

c/mol·L⁻¹:  0.0443     0.285

1. Calculate the moles of Ba(OH)₂

\text{Moles of Ba(OH)$_{2}$} = \text{0.249 L Ba(OH)}_{2} \times \dfrac{\text{0.0443 mol Ba(OH)}_{2}}{\text{1 L Ba(OH)$_{2}$}} = \text{0.011 03 mol Ba(OH)}_{2}

2. Calculate the moles of HCl

The molar ratio is 2 mol HCl:1 mol Ba(OH)₂

\text{Moles of HCl} = \text{0.011 03 mol Ba(OH)}_{2} \times \dfrac{\text{2 mol HCl}}{\text{1  mol Ba(OH)}_{2}} = \text{0.022 06 mol HCl}

3. Calculate the volume of HCl

V_{\text{HCl}} = \text{0.022 06 mol HCl} \times \dfrac{\text{1 L HCl}}{\text{0.285 mol HCl}} = \text{0.0774 L HCl} = \textbf{77.4 mL HCl}\\\\\text{You must add $\large \boxed{\textbf{77.4 mL}}$ of HCl.}

8 0
3 years ago
Calculate the value of Kp at 227°C for the equilibrium: 3 A(g) ⇌ B(g) + D(g) Kc = 5.15
horrorfan [7]
D is the answer I guess
3 0
3 years ago
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