What is geberal formula for alkane? ​

Answer: 3

Explanation: A P E X

Answer:

D i took it aswell

Explanation:

The energy the molecules must have in order to react. Hence, option D is correct.

Activation energy is the sufficient amount of energy necessary to initiate a chemical reaction.

It can also be said as the minimum amount of energy needed to energize molecules or atoms so that they can undergo a chemical reaction or transformation.

Hence, the energy the molecules must have in order to react.

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Answer:

Decomposition.

Explanation:

Decomposition Reactions T hose reactions in which a single substance (reactant) splits up into two or more simpler substances (products) are known as decomposition reactions. These reactions are carried out by supplying energy in form of heat, electricity or light which breaks that substance into simpler substances

Answer:

A DC power supply, commutator, rotor armature, axle, and a field magnet.

Answer:

Drinking water

Showering

Brushing your teeth

Cooking

Doing Laundry

Washing your hands

Watering Plants

Cleaning dishes

Recreation; such as swimming pools

Used to grow food

Explanation:

Answer:

total mechanical energy

Answer:

it's A. The water in the pond reflects light from the Sun, making a mirror image

Explanation:

i just took the test

Answer:

A fly hits a windshield of a truck.

Explanation:

newton's first law

Answer:

d. hydrospher, asthenosphere, atmosphere

Answer:

its actually b atmosphere, geosphere, cryosphere atmosphere

Explanation: atmosphere is most likely the heat in the air or the water evaporating , cryosphere is the ice that forms the glaciers. and thats how i know im not sure about geosphere but i know its none of the others ones hope this helps :D

Answer:

Answer: 1.38 moles

Explanation: According to Avogadro's law, 1 mole of every substance contains Avogadro number of particles (atoms, molecules or ions) i.e.6.023*10^23  particles.

Given : 1 mole molecule of water contains 6.023*10^23 molecules of water.

6.023*10^23  molecules are present in = 1 mole

 8.30*10^23molecules will be present in =

1/6.023*10^23 ×8.30*10^23=1.38 moles

Thus  molecules is equal to 1.38 moles.

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Answer:

Sorry i dont know

Answer:

What is the vapor pressure of an aqueous solution that has a solute mol fraction of c = 0.100? The vapor pressure of water is 25.756 mm Hg at 25°C.

12) The vapor pressure of an aqueous solution is found to be 24.9 mm Hg at 25°C. What is the mole fraction of solute in this solution? The vapor pressure of water is 25.756 mm Hg at 25°C.

9) Determine the molarity of an aspirin solution that produces an osmotic pressure of 0.0555 atm at 25°C (i = 1).

10) A saline solution is administered intravenously to patients who cannot take fluid orally and are in danger of dehydration. The osmotic pressure of this solution must match that of blood to prevent hemolysis or crenation of blood cells. What mass of sodium chloride (58.44 g/mol) is needed to produce 100.0 mL of saline solution with an osmotic pressure of 7.83 atm at a body temper

Explanation:

Answer:

Carbon dioxide becomes a poisonous gas when there is too much of it in the air you breathe. Besides the effects it can have on the planet and the atmosphere, carbon dioxide poisoning can lead to central nervous system damage and respiratory deterioration in humans and other breathing creatures.

Answer:

Carbon dioxide becomes a poisonous gas when there is too much of it in the air you breathe. Besides the effects it can have on the planet and the atmosphere, carbon dioxide poisoning can lead to central nervous system damage and respiratory deterioration in humans and other breathing creatures.

Explanation:

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Answer:

Sn(s) + MgBr2(aq) --> SnBr2(aq) + Mg(s)

Explanation:

Decide whether a chemical reaction happens in either of the following situations.

- A reaction happens. The type of this reaction is the single replacement reaction.

If a reaction does happen, write the chemical equation for it.

Sn(s) + MgBr2(aq) --> SnBr2(aq) + Mg(s)

Answer:

39.7%

Explanation:

To obtain the percentage composition of chromium (Cr) in Na₂Cr₂O₇, do the following:

Molar mass of Na₂Cr₂O₇ = (23×2) + (52×2) + (16×7)

= 46 + 104 + 112

= 262 g/mol

Mass of Cr in Na₂Cr₂O₇ = 2 × 52 = 104 g

Percentage composition of Cr = mass of Cr / Molar mass of Na₂Cr₂O₇ × 100

= 104 / 262 × 100

= 39.7%

Thus, the percentage composition of chromium (Cr) in Na₂Cr₂O₇ is 39.7%

Answer:

There are 6 atoms of oxygen in 2Ca(NO3)2

Answer:

There are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.

Explanation:

We can calculate the number of moles (η) of BeO as follows:

[tex] \eta = \frac{m}{M} [/tex]

Where:

m: is the mass = 250 g

M: is the molar mass = 25.0116 g/mol

Hence, the number of moles is:

[tex] \eta = \frac{250 g}{25.0116 g/mol} = 10.0 moles [/tex]

Therefore, there are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.  

I hope it helps you!

Answer:

10 the power of 23 hydrogen atom

Answer:

how to rapidly separate red#40 from ZnO

Red #40 is soluble in water while zinc oxide is not. 4- heat the solution of red #40 and water until water evaporates and red#40 remains

hope it's help

Answer:

[tex]V_2=120L[/tex]

Explanation:

Hello!

In this case, since Helium is undergoing a volume-pressure change, according the Boyle's law, we infer the following equation is used:

[tex]P_1V_1=P_2V_2[/tex]

Thus, since we are not given the volume at 0.25 atm, we can solve for V2 to do so:

[tex]V_2=\frac{P_1V_1}{P_2}[/tex]

Thus, we plug in to obtain:

[tex]V_2=\frac{1atm*30L}{0.25atm}=120L[/tex]

Best regards!

The final volume of the balloon at the given altitude is 120 L.

The given parameters;

The final volume of the balloon at the given altitude is calculated by applying Boyles law as follows;

[tex]P_1 V_1 = P_2 V_2\\\\V_2 = \frac{P_1V_1}{P_2} \\\\V_2 = \frac{30 \times 1 }{0.25} \\\\V_2 = 120 \ L[/tex]

Thus, the final volume of the balloon at the given altitude is 120 L.

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Answer:

i think the answer is b temperature

Answer:

no

Explanation:

Answer:

Explanation::::

Answer:

The composition of the objects because not all the planets have been explored

Answer:

the cerebrum

Explanation:

answer is A

Answer:

Lime water Ca(OH)2 is a base

Potassium oxide K2O is a basic oxide

Copper sulphate CuSO4 is a salt

And vinegar is an acid

Explanation: