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Chemistry High School

In general how are word equations written to describe chemical equations

2 months ago

Solution 1

Guest #6877613

2 months ago

chemicals reacting are written on the left, what is formed is written on the right after the = sign

eg Copper + oxygen = copper oxide.
Hope this helps , mark as brainliest and say thanks THANKS..

📚 Related Questions

Question

Which statement describes a general property of bases? They taste sour. They turn blue litmus red. They conduct an electric current in a solution. The concentration of H+ is greater than concentration of OH- .

Solution 1

The correct answer is "They conduct an electric current in a solution. "

Acids taste sour, and they turn blue litmus paper red. Also acids such as HCl when dissociates in water it releases H⁺ ions. Thus in an acid the concentration of H⁺ is greater than OH⁻.

HCl + H₂O -> H⁺ + Cl⁻

A base such as NaOH will dissociate in water to form Na⁺ and OH⁻. The ions of an aqueous solution of base will conduct electricity.

NaOH + H₂O -> Na⁺ + OH⁻

Solution 2

Hello there.

Which statement describes a general property of bases?

They conduct an electric current in a solution.

Question

Please help!! A good scientific experiment has the following characteristics: 1. It answers a testable question. 2. It answers a well-defined question. 3. It is systematic. 4. It is controlled. For each of these four characteristics, explain in your own words what it means, and what would likely happen if an experiment did not have that characteristic.

Solution 1

1. You can't test something that you don't have the means to find the answer. For example: You can't test how mustard effects cell growth if you have no way of seeing the cells.
2. The question you are trying to answer should be understandable so people know exactly what it is you are trying to answer.
3. It has a process and the steps are easy to follow so it can be replicated accurately for the purpose of further research.
4. It is done in a way that makes sure no unexpected things cause change to the outcome. It's like when you're trying to find what you're allergic. You don't eat a bunch of foods and wait for a reaction, you eat one thing at a time so that way you're not missing any factors.

Does that make sense?

Question

What is the volume of 53.0g of nitrogen dioxide gas at STP? Answer in units of L.

Solution 1

The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.

What is nitrogen dioxide ?

Chemically, nitrogen dioxide has the formula NO₂. It belongs to a group of nitrogen oxides. Millions of tons of nitric acid are produced annually for use largely in fertilizer manufacture, with NO₂ serving as an intermediary in this process. As the temperature rises, the gas turns reddish-brown.

Nitrogen dioxide is created when reactions between nitrogen oxide (NO) and other nitrogen oxides (NOx) and other airborne molecules occur. The burning of fossil fuels (coal, gas, and oil), particularly the fuel used in automobiles, is the largest source of nitrogen dioxide originating from human activity.

We have the number of moles of gas ( n ), by multiplying the given mass by the inverse of the molar mass of nitrogen gas, which exists in diatomic form given by

n = ( 53g ) × 128.02mol/g

= 6.78 mol

Thus, The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.

To learn more about nitrogen dioxide, follow the link;

brainly.com/question/1467765

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Question

Most water vapor enters earths atmosphere by the process of

Solution 1

Sublimation;When anything solid turns into a gas without first becoming liquid, When the surface layer of snow or ice turns into fog or steam without melting,

Question

If the pressure of the gas in a 2.31 L balloon is 0.12 ATM and the volume increases to 7.14 L what will be the final pressure of the air within the balloon? Assume the temperature remains constant

Solution 1

We can use the ideal gas equation which is expressed as PV = nRT. At a constant temperature and number of moles of the gas the product of PV is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

P1V1 =P2V2

P2 = P1 x V1 / V2

P2 = 0.12 x 2.31 / 7.14

P2 = 0.04 atm

Solution 2

Answer: 0.04 atm

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$ (At constant temperature and number of moles)

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure of gas = 0.12 atm

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = $2.31 L$

$V_2$ = final volume of gas = 7.14 L

$0.12\times 2.31=P_2\times 7.14$

$P_2=0.04atm$

Therefore, the final pressure of the air within the balloon is 0.04 atm.

Question

An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two ways he could change the metal chemically to try to identify it.

Solution 1

Answer:

Some of the physical changes used by the industrial chemist in order to identify it is by scratching it with other metals in order to find the hardness of it. Trying to deform it in order to find the malleability, and to heat it and measure the temperature in order to find the melting point.

Some of the chemical changes used by the industrial chemist in order to identify it is by inserting it in water to observe that whether it reacts with it or not, if the reaction is violent, then the metal belongs to either group I or group II. The other method is to insert it in acids of distinct strength and to observe its reaction. The metals belonging to the second group react briskly with acids. The other metals react gradually with acids and others are almost inert.

Solution 2

Answer:

Explanation:

Question

The vapor pressure of ethanol at 25°C is 7.828 kPa . Calculate the vapor pressure in atm .

Solution 1

First you get 7.83 kPa = 7.83 * 10^4 Pa Then convert it to atm by using the relation 1 Pa = 9.8692 * 10^-6 atm, this gives you 7.83 kPa = 7.83 * 10^4 * 9.8692 * 10^-6 atm = 77.275836 * 10^-2 atm = 0.77275836 atm Now round to three significant digits, = 0.773 atm

Question

What happens when you swallow acid

Solution 1

Some of the symptoms from swallowing hydrochloric acid:

-Abdominal pain
-Breathing difficulty due to swelling of throat
-Chest pain
-Drooling
-Fever
-Mouth pain
-Rapid drop in blood pressure
-Throat pain
-Vomiting blood

Solution 2

It would depend on the type of acid.. If you were to swallow Hydrochloric Acid you would likely have very bad pain in your abdominal, difficulty breathing, bad chest pain, fever, bad pain in your mouth, pain in your throat, and it's also possible to be vomiting blood.

Question

What is the product of the following chemical equation? C3H8(g) + 5O2(g) →

Solution 1

Answer: $CO_2$ and $H_2O$

Explanation:

When a hydrocarbon burns in the presence of oxygen, it forms carbon dioxide and water and this a an example of combustion reaction.

$C _3H_8+5O_2\rightarrow 3CO_2+4H_2O$

Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow.

Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow.

Thus the products are carbon dioxide and water.

Solution 2

Carbon Dioxide and Water

Question

Phenylacetic acid, HC8H7O2 is one of the substances that accumulates in the blood of persons with phenylketonuria, an inherited disorder that can cause death. A 0.085 M solution of HC8H7O2 is found to have a pH of 2.68. Calculate the Ka value for this acid.

Solution 1

A 0.085 M solution of HC₈H₇O₂ is found to have a pH of 2.68. The Ka value for this acid is 0.00005262.

What is phenylacetic acid?

Phenylacetic acid is an inorganic compound that contains two functional groups, one is carboxylic acid and phenol group.

pH is the value of measurement of acidity and the basicity of any liquid. It is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction. It is denoted by ka.

Given, that 0.085 M solution of HC₈H₇O₂. The pH is 2.68.

Ka = [H+][PAc-] / [PAcH]

[H+] = 10⁻²·⁶⁸ = 0.00209M = [PAc-]

[PAcH] = 0.085 = 0.00209 = 0.083

Ka = (.00209)(.00209) / (0.083) = 0.00005262

Thus, the Ka value for this acid is 0.00005262.

To learn more about phenylacetic acid, refer to the link:

brainly.com/question/9788009

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Solution 2

Ka = [H+][PAc-] / [PAcH]

[H+] = 10^-2.68 = 0.00209M = [PAc-]
[PAcH] = 0.085 = 0.00209 = 0.083

Ka = (.00209)(.00209) / (0.083) = Answer Here.

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