Which statements describe how heat flows in foil? Check all that apply. Heat flows in all directions. Heat flows from left to right only. The atoms on top of the foil absorb heat first. The atoms near the candle absorb heat first. Heat flows from the cooler atoms to the warmer atoms. Heat flows from the warmer atoms to the cooler atoms.

Answer:

the escape velocity

Explanation:

To do this, your rock has to go very fast – more than 11 kilometers per second. This velocity is called the escape velocity, the speed an object must achieve in order to overcome the gravitational attraction of a celestial body (be it a planet, a star, or a galaxy) and escape into space

found it online, lol better then nothing

The name of the hydrocarbon having hydrogen atoms above and below each carbon atom and at the ends of carbon chain is pentane.

Hydrocarbons are the compounds which are formed by the combination of hydrogen and carbon atoms.

In the question it is mention that in the compound 5 carbon atoms are present and there specifically not mention the bonds so that single bonds are present between all of them. And hydrogen atoms are attached to single carbon atoms to fulfill their valency.

Hence required hydrocarbon is pentane and its structure is attached below.

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Answer:

Explanation:

Part 1: Theoretical yield

5.00 + 4.24 = 9.24 grams

Part 2: Percent yield

Percent yield = (actual yield)/(theoretical yield) * 100 = (6.55)/(9.24) * 100 = 70.9%

Answer:

[tex]ph \: of \: a \: solution \: = - \: log \: ( {h}^{ + } ) \\ given \: ( {h}^{ + } ) = 2 \times {10}^{ - 5} \\ = ph = - log \: (2 \times {10}^{ - 5} ) \: = 5 - log \: 2 = 4.7[/tex]

Chemical equilibrium is a dynamic equilibrium that is affected by changes in temperature, concentration and pressure

Chemical equilibrium is a dynamic state in a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.

For a reaction in equilibrium, the following factors affect equilibrium:

The principle of chemical equilibrium states that in an isolated system in equilibrium, equilibrium will shift to annul any constraint applied in the system.

Therefore, chemical equilibrium is dynamic and is affected by temperature, concentration and pressure.

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Answer:

periods

Explanation:

In chemsitry, the horizontal columns are known as periods and the vertical columns are known as groups.

Answer:

Reducingagent

Explanation:

Hope this helps you :)

Pls mark brainliest :P

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Tori

Answer:

a) 1

b) from a common ancestor

Explanation:

pls give brainlyist

B. Newtons second law! Have a great day!

If two reactant particles collide, but bounce away unaffected, this is called an ineffective collision.

According to the collsion theory, the reaction between particles occur as a result of the collsion of particles that have energy that is in excess of the activation energy.

Now if two particles, do not posses the activation energy, they collide and rebound from each other. This is called an ineffective collision.

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Answer:

b

Explanation:

Answer:

5.6 moles of AgNO3 is required to produce 2.8 moles of Cu(NO3)2Explanation:Cu + 2AgNO3 Cu(NO3)2 + 2AgBefore solving this one must make sure the equation is balanced.  From the balance equation you could notice that the AgNo3(silver nitrate) has 2 moles while the Cu(NO3)2 has 1 mole. If 2 moles = 1 mole    ?   = 2.8 molescross multiply 2.8 x 2 = 5.6 moles 

Explanation:

C. Regulation body temperature

Answer: Heyo Kenji Here! Here's your answer- N2(g) → NH4+(aq)

Explanation: Hope this helps!

Have a nice day!
- Kenji ^^

Calculate. 925 x 1.5 is 412.5 + 412.5 + 412.5.

This totals to 1387.5 kPa.

Answer:

Co2

Explanation:

The coefficient 2 is multiplied on the invisible 1 (Co1) so it becomes CO2

Or

2co represents 2 molecule of carbon monoxide

The molarity of the methanol solution produced at the given number of moles and volume is 0.75 M.

The molarity of the methanol is determined from the ratio of the number of moles of the methanol to the volume of the methanol.

The molarity of the methanol is calculated as follows;

Molarity = moles/volume

moles = 0.2 L x 3 M = 0.6 mole

Molarity = 0.6 mol/0.8 L

Molarity = 0.75 M

Thus, the molarity of the methanol solution produced at the given number of moles and volume is 0.75 M.

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Answer: 11.478

Explanation:

M   =   MBVB- MAVA/VA + VB

      = number of moles of base - number of moles of acid/total volume

      = 3.6*10^-3 - 5.95*10^-4/1

      = 0.0036-0.000595   = 0.003005

[OH^-]   = M = 0.003005M

POH  = -log[OH^-]

         = -log0.003005

         = 2.522

PH   = 14 - POH

       = 14 - 2.522  

       = 11.478

Therefore, the pH of the solution is 11.478

Sodium hydroxide is a strong base means that  NaOH dissociates completely to Na (aq) and OH-(aq)

A strong base is a base that is completely dissociates in solution to yeild the hydroxide ion in high concentration.

Hence, the fact that sodium hydroxide is a strong base means that  NaOH dissociates completely to Na (aq) and OH-(aq) when it dissolves in water.

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5.30 g of Na2CO3 dissolved in 400.0 mL solution.

the molarity

[tex]mv = \frac{grams}{molar \: mass} [/tex]

[tex](x)(0.4000l) [/tex]

[tex] = 5.30g |105.988g \: {mol}^{ - 1} [/tex]

[tex] = 0.12501415m[/tex]

[tex] x = 0.125m[/tex]

therefore, the molarity of 5.30 g of Na2CO3 dissolved in 400.0 mL solution is 0.125m.

Answer: Propane is c3h8 and oxygen gas is O2

Explanation: make sure equation is balanced and There are 3 carbons in the reactants, and 3 carbons in the products also There are 8 hydrogens in the reactants and 8 hydrogens in the products even though There are 10 oxygens in the reactants and 10 oxygens in the product its already balanced so therefore you then need to  convert the amount of moles of oxygen to the number of moles of propane to get your answer

Answer:

A coffee cup calorimeter is a constant-pressure calorimeter.

Explanation:

As such, the heat that is measured in such a device is equivalent to the change in enthalpy.

Answer:

0.425 atm

Explanation:

According to Ideal Gas Equation,

Given :

Solving :

Answer:

it says the answer bro

look

Explanation:

Answer:

120.366 g/mol

Explanation:

MAGNESIUM SULPHATE HEPTAHYDRATE Magnesium sulfate is an inorganic salt containing magnesium, sulfur and oxygen, with the formula MgSO4. Molar mass: 120.366 g/mol

Answer:

sulfur and oxygen, with the formula MgSO4. Molar mass: 120.366 g/mol

Explanation:

Hi its me a another me lol

1cal=4.184J

Hence

The pressure of hydrogen needed to maintain a H₂ concentration of 0.42 M is 518.5 atm

This states that the solubility / concentration of a gas in liquids at constant temperature is proportional to its pressure. Mathematically, it can be expressed as

S = KP

Where

P = S / K

P = 0.42 / 8.1×10¯⁴

P = 518.5 atm

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Explanation:

Aluminum happens to have 3 extra electron's. luckily, every phosphorus atom is looking to gain 3 electrons. it is a perfect match!!!

The percent yield of oxygen if 10.2 g of O₂ is produced from the decomposition of 17.0 g of H₂O is 67.6%.

Moles (n) of any substance can be calculated by using their mass as:

n = W/M, where

W = given mass

M = molar mass

Given chemical reaction is:

2H₂O → 2H₂ + O₂

Moles of 17g H₂O = 17g / 18.02 g/mol = 0.943 moles

From the stoichiometry of the reaction it is clear that,

2 moles of H₂O = produces 1 mole of O₂

0.943 moles of H₂O = produces 1/2×0.943=0.471 mole of O₂

Now mass of this 0.471 moles of O₂ = (0.472mol)(32g/mol) = 15.104 grams

Actual mass of oxygen = 10.2g (given)

Now on putting vales on the percent yield formula, we get

% yield = (10.2 / 15.104)×100% = 67.53% = 67.6%

Hence the required value of percent yield is 67.6%.

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Answer:67.6

Explanation:bc im just that good

Answer:

Explanation:

Number of Nitrogen atoms : 1 atom

Number of Hydrogen atoms : 1(4) + 1 = 4 + 1 = 5 atoms

Number of Oxygen atoms : 1 atom

Total atoms

Calculate atoms of each element

Total atoms