If the sky is actually black, and the water is actually clear, where does the blue color for the sky and water come from?

Answer:

1.41g

Explanation:

all work is shown in the attached image :-)

Answer:

CaO

Explanation:

Group 2 Carbonates decompose to form oxides of the Group 2 element and Carbon dioxide

Answer:

C

Explanation:

in the option C when we rearrange it then it will he C3H6O2

Answer:

yes its C

Explanation:

correct me if iam wrong

Answer:

2.8 L

Explanation:

From the question given above, the following data were obtained:

Number of mole (n) = 0.109 mole

Pressure (P) = 0.98 atm

Temperature (T) = 307 K

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) =?

The volume of the helium gas can be obtained by using the ideal gas equation as follow:

PV = nRT

0.98 × V = 0.109 × 0.0821 × 307

0.98 × V = 2.7473123

Divide both side by 0.98

V = 2.7473123 / 0.98

V = 2.8 L

Thus, the volume of the helium gas is 2.8 L.

Answer: Yes! you're all good. Alkali metals in group 1 are the most metallic :)

Polywool fibre is synthetic.

⇒b. Synthetic

Hope It Helps You ✌️

Answer:

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Answer:

the moving of something form it's places or position

Answer:

0.5 M

Explanation:

From the question given above, the following data were obtained:

Mass of NaOH = 80 g

Volume of solution = 4 L

Molarity =?

Next, we shall determine the number of mole in 80 g of NaOH. This can be obtained as follow:

Mass of NaOH = 80 g

Molar mass of NaOH = 23 + 16 + 1

= 40 g/mol

Mole of NaOH =?

Mole = mass / molar mass

Mole of NaOH = 80 / 40

Mole of NaOH = 2 moles

Finally, we shall determine the molarity of the solution. This can be obtained as follow:

Mole of NaOH = 2 moles

Volume of solution = 4 L

Molarity =?

Molarity = mole / Volume

Molarity = 2/4

Molarity = 0.5 M

Therefore, the molarity of the solution is 0.5 M.

Answer:

Average velocity of car = 50 km/h

Explanation:

Given information;

Distance cover by man in his car = 25 kilometer

Time taken by man to cover distance = 30 min

Find:

Average velocity of car

Computation:

Time taken by man to cover distance = 30 min

Time taken by man to cover distance = 30 / 60

Time taken by man to cover distance = 0.5 hour

Average velocity = Distance / Time

Average velocity of car = Distance cover by man in his car / Time taken by man to cover distance

Average velocity of car = 25 / 0.5

Average velocity of car = 50 km/h

Explanation:

とおふぉくぉをえおろとようおいおぽあおそ・

'」*とまっぉのもヴぉこぉぞぽ、こ、

Answer:

Ca(OH)2 + 2NH4Cl .................. CaCl2 + 2NH3 + 2H2O

Explanation:

here is the answer to the question

Answer:

infrared light

Explanation:

Answer:

The kinetic energy of the electron just before the collision is 9.3 eV.

Explanation:

We can find the kinetic energy of the electron before the collision can be found by energy conservation:

[tex] E_{i} = E_{f} [/tex]

[tex] K_{a_{i}} + K_{e_{i}} = K_{a_{f}} + K_{e_{f}} [/tex]   (1)

Where:

[tex]K_{a_{i}}[/tex]: is the initial kinetic energy of the atom

[tex]K_{a_{f}}[/tex]: is the final kinetic energy of the atom = 6.1 eV + [tex]K_{a_{i}}[/tex]

[tex]K_{e_{i}}[/tex]: is the initial kinetic energy of the electron =?

[tex]K_{e_{f}}[/tex]: is the final kinetic energy of the electron = 3.2 eV

By solving equation (1) for [tex]K_{e_{i}}[/tex] we have:

[tex]K_{a_{i}} + K_{e_{i}} = (6.1 eV + K_{a_{i}}) + 3.2 eV[/tex]

[tex] K_{e_{i}} = 6.1 eV + 3.2 eV = 9.3 eV [/tex]

Therefore, the kinetic energy of the electron just before the collision is 9.3 eV.

I hope it helps you!

Answer:

3.90g/mL

Explanation:

To find the density of a substance, divide the mass by the volume.

So, 37.6 / 9.65 = 3.89637

then round to 3 significant figures

Good luck!

Answer:

positive force → balanced force → negative force

Explanation:

np

Answer:

positive force → balanced force → negative force

Explanation:

:)))

Answer:

false, The nucleus of atoms still move around like crazy, it's just the electrons move more.

Answer:

Final pressure, P2 = 1088.89 atm

Explanation:

Given the following data;

Initial volume, V1 = 725 cm³

Initial temperature, T1 = 30°C

Initial pressure, P1 = 1.19 atm

Final volume, V2 = 1.12 cm³

Final temperature, T2 = 43°C

To find the final pressure (P2), we would use the combined gas law.

Mathematically, the combined gas law is given by the formula;

[tex] \frac {PV}{T} = k [/tex]

[tex] \frac {P_{1}V_{1}}{T_{1}} = \frac {P_{2}V_{2}}{T_{2}} [/tex]

Substituting into the formula, we have;

[tex] \frac {1.19*715}{30} = \frac {P_{2}*1.12}{43} [/tex]

[tex] \frac {850.85}{30} = \frac {P_{2}*1.12}{43} [/tex]

[tex] 28.3617 = \frac {P_{2}*1.12}{43} [/tex]

Cross-multiplying, we have;

[tex] 28.3617 * 43 = 1.12P_{2} [/tex]

[tex] 1219.5531 = 1.12P_{2} [/tex]

[tex] P_{2} = \frac {1219.5531}{1.12} [/tex]

Final pressure, P2 = 1088.89 atm

Answer:

A. 2 chlorine (Cl) atoms

Explanation:

2 chlorine atoms means that chlorine is a gas.

Sodium (Na) reacts with 2 chlorine atoms according to the equation below;

Na(s) + Cl2(g) => NaCl2

Answer:

fluorine is what its looking for

Explanation:

Answer:

kevin is right according to what i see

Answer:

0.512 M

Explanation:

We'll begin by calculating the number of mole in 12 g of C₂H₆O₄. This can be obtained as shown below:

Mass of C₂H₆O₄ = 12 g

Molar mass of C₂H₆O₄ = (2×12) + (6×1) + (4×16)

= 24 + 6 + 64

= 94 g/mol

Mole of C₂H₆O₄ =?

Mole = mass /molar mass

Mole of C₂H₆O₄ = 12 / 94

Mole of C₂H₆O₄ = 0.128 mole

Next, we shall convert 250 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

250 mL = 250 mL × 1 L / 1000 mL

250 mL = 0.25 L

Thus, 250 mL is equivalent to 0.25 L.

Finally, we shall determine the molarity of the solution. This can be obtained as follow:

Mole of C₂H₆O₄ = 0.128 mole

Volume = 0.25 L

Molarity =?

Molarity = mole /Volume

Molarity = 0.128 / 0.25

Molarity = 0.512 M

Thus, the molarity of the solution is 0.512 M

Answer:

câu trả lời trong hình ảnh

Explanation:

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WHAT IS KNOWN AS HYBRIDIZATION

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The hybrid orbitals r of same level .

The Hybridization takes place in between orbitals of equal or very less energy levels to form same level of energy in all orbitals.

The orbitals combine is always equal to The number of orbitals formed

The names of hybridized orbitals r kept according to the orbital which r combined to form them

sp orbital :- one s and one p combine to form sp orbital

[tex]s {p}^{2} [/tex]orbital :- one s and two p orbitals combine to form it..

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Answer:

1. A constellation is a configuration of stars that form a pattern. True

2. The Little Dipper is a part of the constellation Ursa Major. False

3. The North Star is found in the Little Dipper.True

4. The North Star is also called Merak. False

5. The North Polar Constellations can be seen in the Northern Hemisphere. ales atterns in the night sky constellations .True

Answer:

241.28 g NaCl(s)

Explanation:

Given 1.25 x 10²⁴ molecules of Cl₂ = 1.25 x 10²⁴molecules Cl₂(g)/6.023 x 10²³ molecules/mole = 2.08 mole Cl₂(g)

2Na(s)    +      Cl₂(g)      =>   2NaCl(s)

excess        2.08mole          ? mole

∴moles NaCl(s) formed from 2.08 moles Cl₂(g) = 2(2.08 mole NaCl(s))

= 4.16 mole NaCl(g) = 4.16 mole NaCl(s) x 58 g NaCl(s)/mole NaCl(s) = 241.28 g NaCl(s)  

Explanation:

hope the picture above helps you to understand:)