what is combination reaction give two examples​

Answer:

I know its not Oxygen (O2) because we need that gas to breath if not more of that gas! and i know its not helium because it is not very toxic and not a crisis in the world

Your answers are going to be B. and D.

have a nice day!

The titrant must be used to ensure that when added to the buret it will not be diluted with water.

As with pipettes, burettes should be rinsed with distilled water followed by the filling solution to avoid contamination problems.

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NaCl, H2O and O2 are all pure substance since it cant be separated.

Answer: The loose objects will tend to move to the right inside the car.

Explanation:

The options include:

A. The loose objects will tend to move to the left inside the car.

B. The loose objects will tend to move to the right inside the car.

C. The loose objects will tend to move toward the front of the car.

D. The loose objects will tend to move toward the back of the car.

Based on the question, we are informed that Mary is driving on a straight road and then a deer jumps in front of her, which made her turn her car sharply to the left.

The loose objects inside the car will move towards the opposite direction. Since Mary made a left turn, the loose objects in the car would move to the right.

the are 18.01528 grams

.....

Cork can get out of wine bottle without corkscrew by pushing the cork down into the bottle , use a plastic bag , grip the bag and twist , slowly remove the cork.

To get a cork out of a wine bottle without a corkscrew, you can try the following method:

1. Push the cork down into the bottle: Use a long, thin object like a pen or a chopstick to push the cork into the wine bottle. Apply gentle and steady pressure until the cork is completely inside the bottle.

2. Use a plastic bag: Take a plastic bag and place it over the top of the bottle, covering the cork. Make sure the bag is big enough to cover the entire cork and create a seal around the bottle neck.

3. Grip the bag and twist: Hold the bag tightly around the bottle neck and grip it firmly. Then, start twisting the bottle in a clockwise direction while holding the bag. The friction between the bag and the cork should help to pull it out.

4. Slowly remove the cork: As you twist the bottle, gradually pull the bag upwards. The cork should start to come out of the bottle. Be cautious and continue twisting and pulling until the cork is completely removed.

Remember to be careful while attempting this method to avoid any injuries or spillage. It's always recommended to use a corkscrew for opening wine bottles to ensure a safe and efficient process.

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A reaction with a negative ΔH and a positive ΔS is spontaneous at high temperatures.

When considering the enthalpy change (ΔH) and entropy change (ΔS) of a reaction, their signs provide insights into the spontaneity of the reaction.

A negative ΔH indicates an exothermic reaction, releasing energy to the surroundings. A positive ΔS suggests an increase in the disorder or randomness of the system.

In the given scenario, where the reaction has a negative ΔH and a positive ΔS, the reaction is spontaneous at high temperatures.

This means that at elevated temperatures, the reaction will proceed in the forward direction without requiring an external input of energy.

The increase in disorder (positive ΔS) overcomes the decrease in energy (negative ΔH), driving the reaction forward.

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The new volume of the balloon at a temperature of 0°C is approximately 7.1 liters by using combined gas law. This calculation is based on the assumption that the pressure remains constant, which is a reasonable approximation in this scenario.

To find the new volume of the balloon when its temperature changes from 32°C to 0°C, we can use the combined gas law. The combined gas law states that the ratio of the initial pressure, volume, and temperature to the final pressure, volume, and temperature of a gas remains constant if the amount of gas and the gas constant are constant.

The formula for the combined gas law is:

(P₁V₁) / T₁ = (P₂V₂) / T₂

Where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, and P₂, V₂, and T₂ are the final pressure, volume, and temperature.

In this case, we know the initial volume (V₁) is 8.0 liters at a temperature of 32°C, and we want to find the new volume (V₂) at a temperature of 0°C.

Using the formula, we can rearrange it to solve for V₂:

V₂ = (P₁V₁T₂) / (P₂T₁)

Since the problem does not provide information about pressure, we can assume that the pressure remains constant. Therefore, we can simplify the equation to:

V₂ = (V₁T₂) / T₁

Plugging in the values:

V₂ = (8.0 L * 273 K) / (305 K)

V₂ ≈ 7.1 L

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Answer:

12 number of moles of carbon dioxide are used.

Explanation:

Given data:

Number of moles of oxygen produced = 12 mol

Number of moles of CO₂ used = ?

Solution:

Chemical equation:

6CO₂ + 6H₂O      →     C₆H₁₂O₆ + 6O₂

Now we will compare the moles of oxygen with carbon dioxide.

                     O₂            :          CO₂

                      6             :             6

                    12              :             12

Thus, 12 number of moles of carbon dioxide are used.

Uranium-238 (92 protons, 146 neutrons) → Thorium (90 protons, 144 neutrons) + Alpha particle (2 protons, 2 neutrons)

The nuclear equation for this process can be written as:

^23892U → ^23490Th + ^42He


The given process is an example of alpha decay, in which an alpha particle (consisting of 2 protons and 2 neutrons) is emitted from the nucleus. Uranium-238 undergoes alpha decay and produces thorium-234 along with the alpha particle.

The nuclear equation shows the reactant (uranium-238) on the left-hand side and the products (thorium-234 and alpha particle) on the right-hand side. The atomic numbers and mass numbers of the reactant and products are also shown in the equation.


uranium-238 undergoes alpha decay and produces thorium-234 and an alpha particle. The nuclear equation for this process is ^23892U → ^23490Th + ^42He.
Main Answer: The nuclear equation for the decay of uranium-238 (U-238) into thorium (Th) and an alpha particle is:

U-238 → Th-234 + α

In this process, uranium-238, which has 92 protons and 146 neutrons, undergoes alpha decay. During alpha decay, the nucleus loses 2 protons and 2 neutrons, forming an alpha particle (α) which has 2 protons and 2 neutrons. The remaining element is thorium-234 (Th-234), which has 90 protons and 144 neutrons.

The nuclear equation representing the natural decay of uranium-238 into thorium and an alpha particle is U-238 → Th-234 + α, where U-238 undergoes alpha decay and loses 2 protons and 2 neutrons, forming Th-234 and an alpha particle.

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Answer:

CH4(g) +2O2____ CO2(g) +2H2O (l)

Answer:

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

Answer: Like, milk?

Answer:

the substance are acids.

Explanation:

between 6.0 -6.9 are slightly acidic

He was the first to propose that matter is made of atoms.  Therefore, the correct option is option A.

The smallest unit of matter that may be divided without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.

Space makes up the majority of an atom. The rest is made up of a cloud of electrons with negative charges surrounding the positively charged nucleus made up of protons and neutrons. He was the first to propose that matter is made of atoms.

Therefore, the correct option is option A.

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Your question is incomplete but most probably your full question was,  

Why is John Dalton known as the originator of atomic theory? A. He was the first to propose that matter is made of atoms. B. He proved that atoms are divisible in nature. C. He based his theory on philosophical assumptions. D. He could scientifically explain the theory of atoms.

Propyne is is composed of only hydrogen and carbon. It is a hydrocarbon molecule.

The molecule propyne is hydrocarbon. This means that it is composed of only hydrogen and carbon. The molecule contains three carbon atoms and four hydrogen atoms as shown.

The structral formula that corretly reperesents the molecule called propyne is shown in the image attaced to this answer.

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Answer:

C.

Explanation:

Answer:

thats cool mate

Explanation:

hope ya have a good day, im answering just for the points tbh

Answer:

ello thats great free points then >:3

-XxanimexX

Answer:1,01

Explanation:

Answer:

347.4 (19.3 mole)

Explanation:

CH4 + 2O2 = CO2 + 2H2O

1(mole) - 9.65(mole)

2(mole) - x ⇒x = 9.65*2=19.3

m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)

Answer:

go to the website quizlet it will help you!!!!!!!!

Explanation:

Answer:

Multiply the moles by Avogadro's number (\(6.02\) x \(10^{23}\)) to get the number of atoms

\((0.0255 \ mol)\) * \((6.02 \ * \ 10^{23})\)

= 1.5351 x \(10^{22}\)

Therefore the answer is 1.5351 x 10^22 atoms in 0.0255 moles of Calcium

the largest cell potential when used along with a Mn/Mn2+ is Cu²⁺/Cu

A voltaic cell or galvanic cell is a battery that uses electrochemical energy produced from redox reactions to produce electricity. In this reaction, manganese is the anode and copper is the cathode.

Half-cell responses and respective cell potentials are shown below.

Mn = Mn²⁺ + 2e⁻        E°=-1.18V

Zn²⁺ +2e⁻  = Zn          E° = -0.76V

Pb²⁺ + 2e⁻ = Pb          E° -0.13

Cu²⁺ + 2e⁻ = Cu          E° 0.34

When Solving Cell Potentials

E° cell = E° cathode -E° anode

for Mn and Zn.

Mn (s) + Zn²⁺(aq)→ Mn²⁺(aq)+Zn(s)

E° cell = −0.76v−(−1.18v)=0.42v

For Mn and Pb the following applies:

Mn(s)+ Pb²⁺(aq) → Mn²⁺(aq) + Pb(s)

E° cell = −0.13v−(−1.18v)=1.05v

For Mn and Cu:

Mn(s)+ Cu²⁺(aq) → Mn²⁺(aq) + Cu(s)

E° cell = 0.34-(-1.18) = 1.52V

The Cu  happens to be the largest among the others.

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An error can be defined as a deviation from the correct value of a given measurement.

The percent error is 8.7%

The formula for percent error is given as:

Percent error = |Measured  value – Exact Value|/Exact value * 100.

From the above:

Measured value = 25 ml

Exact Value = 23 ml

Hence:

Percent Error = | 25ml - 23 ml | / 23 ml * 100

Percent Error = 2/23 * 100

Percent Error =  8.7%

Therefore the percent error is 8.7%

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The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).

An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.

This means that the number of protons in an atom is unique to a specific element.

Iron (Fe) has 26 protons in the nucleus of its atom.

Therefore, an ion with 26 protons is an ion of the element iron (Fe).

Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.

Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons  is Fe (option c)

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The given statement "Heat is not a measure of the ability of a substance to take in or give up heat" is false. . Heat is actually the energy transferred from one body or system to another due to a difference in temperature.

Heat can be thought of as a flow of energy from hotter to cooler objects, and it is measured in joules (J) or calories (cal). The ability of a substance to take in or give up heat is actually described by its specific heat capacity.

Specific heat is defined as the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius. Therefore, a substance with a high specific heat can take in or give up more heat energy than a substance with a low specific heat for the same change in temperature.

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Answer:

the steak I ate because its protein

Answer:

Just to prove that the persons answer on top of mine is correct :D

Explanation:

Answer:

Explanation:

8

Answer:

Chemical Compound

Explanation:

I'm not sure why but I know it's chemical. Hope this helps!

Answer: covalent bond

Explanation: Yeah that's the answer