Answer:
false
Explanation:
when molecules move they heat up
Which gas is made from more than one element?
What happens to the energy release of an exothermic reaction?
1.It increases the bond energy of the reactants.
2.It is released to the surroundings.
3.It raises the temperature of the reactants.
Answer:
2.It is released to the surroundings.
Explanation:
In an exothermic reaction, the energy released is to the environment. At the end of the reaction, the surrounding becomes hotter than the system where the reaction is taking place.
Heat is liberated to the surrounding in an exothermic change. At the end of this change, the surrounding becomes hotter. Examples are combustion, dissolution of substances, etc.Use the equation below to solve the problem that follows.
2H2 (g) + O2 (g) → 2H2O (g)
When David reacts 13.8 grams of hydrogen gas with excess oxygen, 87.0 grams of water are formed. Calculate his percent yield of water.
Answer: 142.8%
Explanation:
13.8g H2 * (1 mol H2 / 2 g H2) * (2 mol H2O/ 2 mol H2) * (18 g H2O/1 mol H2O) = 124.2 g H2O
we just calculated our theoretical amount that should be formed and we are given the actual
percent yield: actual/theo * 100% = 124.2/87 * 100% = 142.8%
Which of these are significant problems with bottled water?
Immense plastic use
Fossil fuel used to transport water
Water bottles can leach toxics into water
All of the above
Answer:
All the above
Explanation:
All the above
how is oxidation of copper seen on the statue of liberty similar to flammability and how is it different from flammability?
Answer:
Flammability and oxidation of copper are both chemical properties of a substance.Chemical properties are the properties that tells us how a substance can react with others.Flammability, oxidation of copper, rusting of iron, precipitation e.t.c are chemical properties of a substance.Flammability is one important chemical property of hydrocarbons.Oxidation reaction is peculiar to copper.
Explanation:
What is Constituent Element?
Answer:
hope it helps...
Explanation:
a constituent element, material, etc.; component. a person who authorizes another to act in his or her behalf, as a voter in a district represented by an elected official. Grammar. an element considered as part of a construction. Compare immediate constituent, ultimate constituent.
If this helped please comment...
WILL GIVE BRANLIEST!!
Carbon tetrachloride (CCl4) is
ionic
covalent
Answer:
Covalent
Explanation:
In the carbon tetrachloride molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration joined to a central carbon atom by single covalent bonds
Answer:
Carbon tetrachloride (CCl4) is ✔ covalent.
Answers to assignment question:
What properties would you expect for CCl4? Select all that apply.
It is likely a gas or liquid at room temperature.
It is likely soluble in water.
It will likely light up a bulb in a conductivity apparatus.
It will likely have a high melting point.
Calcium oxide (CaO) is ✔ ionic.
What properties would you expect for CaO? Select all that apply.
It is likely a gas or liquid at room temperature.
It is likely soluble in water.
It will likely light up a bulb in a conductivity apparatus.
It will likely have a high melting point.
Explanation:
all correct on edge! :D
What does it mean when there is a physical change?
Question 1 options:
A new substance has been formed.
Matter has changed size, shape or form.
Matter has changed from one substance into another.
Matter has changed on the molecular level.
Answer:
The matter has changed size, shape, or form.
Explanation:
A new substance that is formed is creation.
if the matter changed from one substance to another this is called a chemical reaction.
Surely not. It won't change the molecular level.
Hope that helps.
how would one convert 36 yd to centimeters?
Answer:
3291.84 cm
Explanation:
you would multiply the amount of yards you have by 91.44, since that's how many centimeters there are in 1 yd.
Answer: it’s D
Explanation:
Consider the reaction.
Upper H subscript 2 upper o (g) plus upper C l subscript 2 upper O (g) double-headed arrow 2 upper H upper C l upper O (g).
At equilibrium, the concentrations of the different species are as follows.
[H2O] = 0.077 M
[Cl2O] = 0.077 M
[HClO] = 0.023 M
What is the equilibrium constant for the reaction at this temperature?
0.089
0.26
3.9
11
Answer:
The value of Equilibrium constant for the given reaction is 0.089
Explanation:
The given data shows the following reaction
H2O (g) + Cl2O (g) ⇄ 2 HClO (g)
The above reaction is in equilibrium.
Equilibrium constant K = [tex]\frac{[C]^c*[D]^d}{[A]^a*[B]^b}[/tex]
for the reaction
aA+bB ⇆ cC +dD
so
K = [tex]\frac{[HClO]^2}{[H2O][Cl2O]}[/tex]
= [tex]\frac{[0.023]^2}{[0.077][0.077]}[/tex] = 23*23/77*77 = 0.089
Therefore the value of Equilibrium constant for the given reaction is 0.089
Answer:
The value of Equilibrium constant for the given reaction is 0.089
How to do this question plz answer me
Answer: Ionic
Explanation: It is a type of chemical bond that generates two oppositely charged ions.
Compare the viscosity property of solid and liquid.
Answer
There is nothing like viscosity in solid because most of the solids usually have a rigid body. This is due to strong intermolecular forces. And it is due to this strong force between the molecules that they are unable to move and they remain fixed at their position. Some solids such as graphite which have layered structure, don't possess the property of viscosity, because of the strong force between the layers.
Explanation:
Viscosity is the property of a fluid that opposes the relative motion between two surfaces of the fluid that are moving at different velocities. In simple terms, viscosity means friction between the molecules of fluid.
FOR EXAMPLE
water is "thin", having a low viscosity, while vegetable oil is "thick" having a high viscosity
why organic compounds have a slow rate of reaction
Answer:
first help me plz plz
Explanation:
coz i hate chemistry
5. Name the compound which contain Strontium, Fluorine, and Oxygen.
Options:
Strontium fluorate
Strontium fluoride
Strontium chlorate
Strontium fluorine
3.04 Quiz: Chemical Reactions
Word bank please help fill.
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.
in any study of energy, energy conversion is not important. true false
Answer:
I think its false
Explanation:
Any energy is important
Hope this helps <3
Answer:
In any study of energy, energy conversion is not important. Heat energy that is lost cannot usually be used to produce work.
Explanation:
Hope this helps!
If so, please mark BRAINLIST!!
thx
Carl makes the table below to determine the number of atoms of each element in the chemical formula 4Ca(ClO3)2.
A table with 3 columns and 2 rows. The first column labeled element has entries calcium, chlorine, oxygen. The second column labeled calculation has entries 1 times 4 , 1 times 2, 3 times 2. The third column labeled total atoms has entries 4, 2, 6.
What mistake did Carl make?
Answer:
calcium chloride oxide
Answer:
He did not multiply the chlorine and oxygen atoms by the coefficient 4
Explanation:
I just took the quiz
How can a mixture be separated?
Answer:
Mixtures can be physically separated by using methods that use differences in physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.
If he soundwave is producing sound with the steady pitch and is vibrating with a frequency of six waves per second then how many ways will be produced in four seconds
Answer:
n = 24 waves
Explanation:
As, the sound is produced with a steady pitch. Therefore, it means that there is no change in the pitch with respect to time. Hence, we can work with the following formula for frequency:
υ = n/t
where,
υ = frequency of sound wave = 6 waves/s
n = no. of waves = ?
t = time interval = 4 s
Therefore, using these values in the equation we get:
6 waves/s = n/4 s
n = (6 waves/s)(4 s)
n = 24 waves
which statement is true of the particles that make up a substance?
a. Particles in a liquid and particles in a solid have the same amount of energy
b. Particles in a solid have more energy than particles in a gas
c. Particles in a gas have more energy than particles in a liquid
d. Particles in a liquid have more energy than particles in a gas.
Answer: particle in gas have more energy than the particles in a liquid
Explanation: this is because the amount of energy is directly proportional to how random the system is. gaseous molecules are in a more constant random motion than the liquid molecules
How many atoms of each element are in one molecule of 2-heptanone
Answer:
A chemical structure of a molecule includes the arrangement of atoms and the chemical bonds that hold the atoms together. The 2-HEPTANONE molecule contains a total of 21 bond(s) There are 7 non-H bond(s), 1 multiple bond(s), 4 rotatable bond(s), 1 double bond(s) and 1 ketone(s) (aliphatic).
Answer:
Explanation:
CH3 provides 1 Carbon
C4 provides 4 carbons
COC provides 2 more
Total 7 Carbons
======================
COCH3 Provides 1 Oxygen
======================
CH3 provides 3 Hydrogens
C4H8 provides 8 hydrogens
COCH3 has 3 more hydrogens
Total 14 hydrogens
The answer should be B.
You should note that there are no brackets which means you only need to read the small numbers going down behind each element. You might have to read that sentence a could of times, but it is important to know.
explain why particles of colloidal solution donot settle down when left undisturbed , while in the case of suspensions they do .?
Answer:
the partial of colloidal are smaller and they are not heavy whereas the partial of suspension are larger but they are heavy and less movement thus they settle down due to gravity
Can be a solid,liquid,or gas A)Metal B)Nonmetal C)Both
Answer:
I think it's B. Nonmetal
(I'm so sorry if it's wrong)
Hope this Helps!
Answer:
I personally think it's both I'm sorry if this is wrong
An atom of an element has 2 electrons in the 1st energy level and 5 on the 2nd energy level what element is it ?
the element is nitrogen
5+2=7
:answer question number 8
Answer:
Weight
Explanation:
Weight changes because the moon's gravity is different from the Earth's. Mass is always the same. Volume remains the same. Density also remains the same. Hope my answer is correct! If there is a lot of explanation, you can give a brainliest to my answer.
With a partner, look at the stone bricks used to build this building and think about how they changed over time. What caused them to change? Do you think these changes occurred quickly or slowly? Explain.
Answer:
Chemical WeatheringSlowlyExplanation:
Building bricks deteriorate overtime due to chemical weathering from moisture constantly in contact with it overtime, as well temperature changes. Their topmost layers leach after continuous attack, and are eroded. thereby causing them to break away most times.
This cycle takes place overtime and is not a quick action.
I hope this is easy to understand.
How do I find the formula for Phosphorus Tetroxide
What will happen to a salt water fish if placed in freshwater?
Answer:
they will die because they need to be in salt water
Identify the major force between molecules of pentane and hexane
Answer:
induced-dipole induced dipole forces.
Explanation:
Classify the triangle based on the side lengths 9, 40, and 41
Answer:
That's a right Triangle
Explanation:
algebra.com
Answer:
scalene triangle
Explanation:
Scalene triangles don't have any equal side lengths.
Use the drop-down menus to identify the order of these images for the formation of our solar system.
Answer:
Explanation: