Chemistry High School

3.04 Quiz: Chemical Reactions
Word bank please help fill.

3.04 Quiz: Chemical ReactionsWord Bank Please Help Fill.

Answers

Answer 1

Answer:

1. Chemical reactions

2.Substances

3. Properties

4. Precipitate

5. Light

6. Temperature

7. Color

8. Gas

Explanation:

During chemical reactions, new substances that possess new properties are formed. During the process of chemical reactions, evidences are found. Some of the evidences are formation of precipitate or light gel, production of gases and changes in colour and temperature.

Chemical reactions start with the substances or compounds which are known as reactants. The reactants react to form new substances known as the products which possess new properties.

Related Questions

CAN SOMEONE PLEASE HELP ME WITH THIS PLZ

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Answer:

the pressure increases

Volume of water displaced

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Answer:

The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid.

What does an oxygen atom do when becoming an ion?

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It gains 2 electrons from another atom so it becomes an anion.

A laser used in eye surgery to fuse detached retinas produces radiation with a wavelength of 6.4 x 10^-7 m. What is the frequency of the laser?
Speed of light = 3.00 x 10^8 m/s

(Hint: Remember to round your answer to the lowest number of significant figures.)


(Speed of light) / (Wavelength) = Frequency

show steps please.​

Answers

Answer:

ν ≈ 4.7 × 10¹⁴ Hz

General Formulas and Concepts:

Chem

Speed of Light = Wavelength times Frequency

c = λν c = 3.0 × 10⁸ m/s

Explanation:

Step 1: Define

λ = 6.4 × 10⁻⁷ m

Step 2: Solve for ν

3.0 × 10⁸ = 6.4 × 10⁻⁷ · ν

ν = 4.6875 × 10¹⁴ Hz

Step 3: Check

We are given 2 sig figs. Follow sig fig rules.

4.6875 × 10¹⁴ Hz ≈ 4.7 × 10¹⁴ Hz

What are the names, symbols, and atomic numbers of the nonmetal elements that are NOT gasses?

Answers

Seventeen elements are generally classified as nonmetals: most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon);


one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine). Metalloids such as boron, silicon, and germanium are sometimes counted as nonmetals.

ANSWER:

Liquid:
Bromine - Br - 35

Solid:
Carbon - C - 6
Phosphorus - P - 15
Sulfur - S - 16
Selenium - Se - 34
Iodine - I - 53


Need help please with this, I’ll give brainliest!!!

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Answer:

38 g?

Explanation:

I'm not entirely sure, but perhaps it is 49 grams x 78.25%? This gives you an answer of 38 g using significant figures.

How can the gravitational potential energy of an object be changed?

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Answer:

Gravitational potential energy may be converted to other forms of energy, such as kinetic energy. If we release the mass, gravitational force will do an amount of work equal to mgh on it, thereby increasing its kinetic energy by that same amount (by the work-energy theorem).

Explanation:

Teresa creates an experiment Washington states to read colored substances together in a container in observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after 8 minutes. What does this represent about the type of change happening in the container

Answers

The question is incomplete, the complete question is;

Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. What does this represent about the type of change happening in the container? A chemical change started immediately and finished at eight minutes. A non-chemical change started immediately and finished at eight minutes. A chemical change occurred at four minutes. A non-chemical change occurred at four minutes.

Answer:

A chemical change started immediately and finished at eight minutes.

Explanation:

A chemical change is one in which a new substance is formed. One of the indicators that a chemical change has occurred is the change in the color of the system from red to blue.

The question clearly stated that the change occurred gradually. This means that the reaction must have started immediately the substances were mixed and went on to conclusion after eight minutes when the complete blue color appears.

why do chemical equations have to be equal

Answers

Answer:

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.

Explanation:

YW :)

What kind of molecule can experience hydrogen bonding?
A. A nonpolar molecule containing a hydrogen atom
B. A molecule with hydrogen bonded to any nonmetal
C. A molecule with hydrogen bonded to O, N, or F
D. Any polar molecule containing a hydrogen atom

Answers

Answer:

Answer is C

Explanation:

C - A molecule with hydrogen bonded to O, N, or F

A molecule with hydrogen bonded to O, N, or F can experience hydrogen bonding. Therefore, the correct option is option C.

A hydrogen atom is attracted to another electronegative atom in a neighbouring molecule when it is connected to a strongly electronegative atom (O, N, or F). This attraction is more powerful than the usual dipole-dipole interactions between polar molecules.

The enormous electronegativity differential between hydrogen and the highly electronegative atom causes hydrogen bonding. The electronegative atom attracts the shared electrons in the covalent link, causing the hydrogen atom to gain a partial positive charge.

To know more about hydrogen bonding, here:

https://brainly.com/question/31139478

#SPJ4

whats the mass of neon

Answers

Answer:

20.17 (or if you want to round .18)

Explanation:

If you ever need help with this again the atomic mass is the number underneath the element name

You are at a carnival fun house standing 3m in front of a lens with a focal length of 2.5m. What would happen to your image if the lens was concave? What would the image look like if the lens was convex?

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The convex lens would produce a virtual

Anatoms of an element with atomic number 48 and mass number 120
contains

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That element is cadmium and it is an isotope (an atom with the same number of protons and varying neutrons which change its mass number)

Cadmium 120 has 48 protons and 72 neutrons which makes its mass number 120

Hope that helps :)

Describe what happens to kinetic energy of the molecules when temperature increases.

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Answer:

When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

Explanation:

That is all I know.

How do you identify an element?

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Answer:

element is the smallest particles which cannot be broken down.

i have the most potential energy if i am​

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Answer:

travel the world in one day

Electromagnetic waves will travel the SAME SPEED (speed of light) WITHIN a medium as it does WITHOUT a medium. Question options: True False

Answers

Answer:

True

Explanation:

The speed that electromagnetic waves will travel within any medium is the same as those without a medium. The speed of electromagnetic wave is a constant and does not depend on the material of the medium.

Electromagnetic waves are waves that do not require a material medium for their propagation. They are able to pass through vacuums and mediums with particles at constant speed. It is mechanical waves whose speed is medium dependent. Mechanical waves have varying speed based on the mediums they move through.

Which chemical equation below is balanced to follow the Law of Conservation of Mass?

2 H2 + Cl2 > 3 HCl
2 H2 + 2Cl2 > 2 HCl
H2 + Cl2 > 2HCl
H2 + Cl2 > HCl

Answers

Answer:

H₂ + Cl₂ → 2HCl

Explanation:

The equation that is balanced and follows the law of conservation of mass is:

 H₂ + Cl₂ → 2HCl

Based on the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but they combine with one another".

It suggests that the number of species on both sides of the expression must be the same.

 For the given reaction:

        H₂ + Cl₂ → 2HCl

             Reactant side              Product side

H                  2                                   2

Cl                  2                                   2

The element with the smallest iconic radius in the alkaline earth metals is

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Answer:

Metal.

Explanation:

Metal has the smallest iconic radius in the alkaline earth metal.

what is carbogen and it's uses​

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Carbogen is a mixture of carbon dioxide and oxygen, it is used to stimulate breathing in the treatment of respiratory disease.

PLEASE HELP ME!!!!
Answers are below the sentence

Answers

Answer:

Mass

Explanation:

if one species of rabbit, the gene for brown fur ( B) is dominant, while the gene for black fur ( b) is recessive. One rabbit has the dominant allele for brown fur and the recessive allele for black fur. Another rabbit has two recessive alleles. If the two rabbits have offspring, what are the odds of one of the offspring having brown fur?

Answers

Answer:

1/2

Explanation:

According to this question, the gene coding for fur color in rabbits contains two alleles viz: alelle for brown fur ( B) is dominant, while the allele for black fur ( b) is recessive. This means that an heterozygous rabbit (Bb) will have brown fur.

Based on the question, one rabbit has the dominant allele for brown fur and the recessive allele for black fur i.e genotype Bb, another rabbit has two recessive alleles i.e. genotype bb. If these two rabbits cross i.e. Bb × bb, the proportion of the offsprings produces will have Bb, Bb, bb and bb genotype.

Bb is dominant, hence, 1/2 of the offsprings will be brown furred.

one species of rabbit, . the two rabbits have offspring, what are the

Why do lunar and solar eclipses not happen every month?
-Eclipses only occur during full and new moons.
-Earth rotates around its axis faster than the moon.
-The moon and Earth only travel through the penumbras.
-The moon’s axis does not always align with Earth’s shadow.

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Answer:

i think its the last one

Answer: The moon’s axis does not always align with the Earth’s shadow.

The moon does rotate around the Earth every month but that doesn’t mean it can get a shadow every time due to the moon’s tilted path around the Earth.

PLEASE HELP!!!!! NEED HELP ASAP!!!!!

Write the chemical formula for the covalent compounds below
EXAMPLE- dinitrogen trioxide= N2O3

nitrogen monoxide =
dihydrogen oxide =
diphosphorus pentoxide =
sulfur trioxide =

Answers

Answer:

down below

Explanation:

NO

H20

P4O10

SO3

1. NO

2. H2O

3. P4O10

4. SO3

What wave properties do x-rays and gamma rays possess that cause them to have such high energy?

Answers

Answer:

Waves with a very short wavelength, high frequency and high energy

Explanation:

We apply the same amount of energy to 10.0-g samples of aluminum, iron, and silver which begin at the same temperature. Rank the metals from highest to lowest temperature after the heat is applied

Answers

Answer:

Ag > Fe > Al

Explanation:

The values of the specific heat capacity of the elements are given as;

Aluminum = 0.897 J/g*K  

Iron=0.449 J/g*K  

Silver=0.235 J/g*K

Specific heat capacity basically refers to how much heat is required to change the temperature of a unit mass of a substance by a degree. Elements with high specific heat capacity would require higher energy compared to elements with lower values,

Aluminium (Al) has the highest specific heat capacity, hence it wold require more energy to cause a change in temperature. Aluminium would be the lowest.

Silver (Ag) has the lowest specific heat capacity hence it would require less energy to cause a change in temperature. Silver wold be the highest.

The middle would be iron (Fe).

The rank is given as;

Ag > Fe > Al

395,000 divide by 9000

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Answer:

it is 395/9 =43.8888889

CAN U GUYS HELP ME ON THIS ONE PLEAASE IM TOO DUMB YO ANSWER THIS ONE IM NOT EVEN LYING TOO PLUS THIS ASSIGNMENT WAS DUE LAST FRIDAY :(

CH3Br Draw out the work for all 4 steps for the Lewis structure.

Grading Criteria:
a. Correctly count the total valence electrons (2pt)
b. Correctly identify and draw the location of the central atom and surrounding atoms. (2pt)
c. Correctly draw the total amount and location of the electrons on the lewis structure. (2pt) ​

Answers

Answer:

For CH3Br, there are a total of 14 valence electrons. Hydrogen always goes on the outside, and since Carbon is less electronegative than Bromine, we'll put the Carbon in the center and the Bromine on top. We have 14 valence electrons for the CH3Br Lewis structure. Put two between atoms to form chemical bonds.

Explanation:

check wether all the answers are correct or not. please?​

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Answer:

I dont now but I think it is correct

You spelled whether wrong

The lowest allowable energy state of an atom is called its .

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The lowest allowable energy state of an atom is called its ground state . Hope this helps (:
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