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3 years ago

What is one condition that is necessary for a hurricane to form?

Chemistry

1 answer:

zhuklara [117]3 years ago

8 0

Explanation:

Thunderstorms, warm ocean water and light wind are needed for a hurricane to form (A). Once formed, a hurricane consists of huge rotating rain bands with a center of clear skies called the eye which is surrounded by the fast winds of the eyewall (B).

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Stars which appear to revolve around Polaris and do not set (go below the horizon) are called:

Andrej [43]

Circumpolar stars

Explanation:

Stars which appears to revolve around the Polaris and do not set or go below the horizon are called circumpolar stars.

In short, this stars circles the pole.

Circumpolar stars are not found at the equator.
These stars do not set and they are visible at the north poles.
The simply stay as the earth spins on its axis.

Learn more:

Stars brainly.com/question/11007330

#learnwithBrainly

4 0

3 years ago

If you are confused about something in class, don't wait. Raise your hand and ask for help immediately. Do it while your teacher

abruzzese [7]

Answer:

Don't give up on yourself.

Explanation:

5 0

3 years ago

Read 2 more answers

A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 4.75 ∘C. What is the molal concentration of glucose in this solution

Tom [10]

Answer:

$\large \boxed{\text{2.55 mol/kg}}$

Explanation:

1.Calculate the freezing point depression

ΔTf = 0.00 °C - (-4.75 °C) = = 0.00 °C + 4.75 °C = 4.75 °C

2. Calculate the molal concentration

The formula for the freezing point depression by a nonelectrolyte is

$\Delta T_{f} = K_{f}b\\b = \dfrac{\Delta T_{f}}{ K_{f}} = \dfrac{4.75 \, ^{\circ}\text{C}}{\text{1.86 $\, ^{\circ}$C$\cdot$kg$\cdot$mol}^{-1}} = \textbf{2.55 mol/kg}\\\\\text{The molal concentration of sucrose is $\large \boxed{\textbf{2.55 mol/kg}}$}$

5 0

3 years ago

How can you tell if an electric charge is present?

Svetllana [295]

If an element is written with a plus (+) or minus (-) symbol in the superscript then the element is either an anion or cation ( ion)

Ex : H₂ -----> stable or elemental form

Na⁺------> Cation

Cl⁻------> Anion

Technically an atom have positive charge when it loses its valence electrons and negative charge when it gains electrons.

7 0

4 years ago

A solution contains 482.6 g

mariarad [96]

Answer:

$\large \boxed{\text{102.57 $\, ^{\circ}$C}}$

Explanation:

Data:

m₂ = 482.6 g sucrose

m₁ = 0.2804 kg water

Calculations:

The formula for the boiling point elevation ΔTb is

$\Delta T_{\text{b}} = iK_{\text{b}}b$

i is the van’t Hoff factor — the number of moles of particles you get from 1 mol of solute. For sucrose, i = 1.

1. Moles of sucrose

$n = \text{482.6 g} \times \dfrac{\text{1 mol}}{\text{342.30 g}} = \text{1.410 mol}$

2. Molal concentration of sucrose

$b = \dfrac{\text{1.410 mol}}{\text{0.2804 kg}} = \text{5.029 mol/kg}$

3. Increase in boiling point

$\rm \Delta T_{b} = iK_{b}b = 1 \times 0.512 \, \, ^{\circ}\text{C} \cdot kg \cdot mol^{-1} \, \times 5.029 \cdot mol \cdot kg^{-1} = 2.574 \, ^{\circ}\text{C}$

4. Boiling point

$\rm T_{b} = T_{b}^{\circ} + \Delta T_{b} = 100.00 \, ^{\circ}\text{C} + 2.574 \, ^{\circ}\text{C} = \mathbf{102.57 \, ^{\circ}C}\\\rm \text{The boiling point of the solution is $\large \boxed{\mathbf{102.57 \, ^{\circ}C}}$}$

7 0

3 years ago