Answer:
A combustion reaction is when a fuel, usually a hydrocarbon, reacts with excess oxygen to form carbon dioxide gas and water vapor.
Explanation:
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Which of the following could be a characteristic of the fossil that is most closely related to humans?
S-shaped back bone
Arms longer than legs
Water-dwelling
Tree-dwelling
9. A family is driving to a nearby city. If they travel an average 68 miles per hour for 3.2 hours how
many miles have they gone?
All you have to do is multiply 68 miles and 3.2 hours. It will give you the answer, 217.6 mph.
68x3.2=217.6 miles per hour.
What kind of engine does a hybrid car use?
A. gasoline and solar
B. gasoline
C. gasoline and electric
D. electric and solar
Answer:
D. Electric and solar
Answer:
Gasoline and Electric
Explanation:
Quite simply, a hybrid combines at least one electric motor with a gasoline engine to move the car, and its system recaptures energy via regenerative braking. Sometimes the electric motor does all the work, sometimes it's the gas engine, and sometimes they work together.
could someone please put these examples in groups of which is kinetic energy and which is potential energy I WILL PUT YOU BRAINLIEST ;)))
Answer:
Potential: slingshot, baseball, grasshopper, cliff diver everything else is kinetic
Explanation:
Answer:
slingshot- potential
bobsled- kinetic
grasshopper-potential
swing- potential
cliff diver- potential
baseball- potential
satellite- kinetic
sky diver- kinetic
basketball- potential
arrow- kinetic
Explanation:
:)
what causes atoms to react with each other?
a. a state change
b. a chemical equation
c. a physical change
d. a chemical reaction
Answer:
You are right, it's D
A chemical Reaction causes atoms to react with each other. Hence Option (D) is correct.
What is Chemical Reaction ?
A process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
Therefore, A chemical Reaction causes atoms to react with each other. Hence Option (D) is correct.
Learn more about chemical reaction here ;
https://brainly.com/question/3461108
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A. 207 kJ
B. 4730 kJ
C. 9460 kJ
D. 414 kJ
Answer:
C = 9460 Kj
Explanation:
Given data:
Mass of copper = 2kg
Latent heat of vaporization = 4730 Kj/Kg
Energy required to vaporize 2kg copper = ?
Solution:
Equation
Q= mLvap
by putting values,
Q= 2kg × 4730 Kj/Kg
Q = 9460 Kj
rationalize the following statements and give chemical reactions .
(1) Lead (II) chloride reacts with chlorine to give pbcl4.
(2) Lead is known not to form an iodide,pbl4 .
Answer:
i do not no
Explanation:
sorry i do not known
Chemistry guys help me it’s urgent
The metal grill of the barbecue is made of steel. Six properties of steel are given below. Which properties are needed for the metal grill?
Answer:
It is rigid.
It has a very high melting point.
Explanation:
It conducts electricity. It is rigid. It has a very high melting point. It is magnetic. It is shiny. It rusts.The two properties that are needed for the metal grill out of the options are its rigidity and high melting point.
The rigidity of the metal grill will enable it to hold materials to be grilled without problems while the high melting point will enable the grill to remain intact at the high temperature required for the successful grilling of certain food materials.
not sure on this, REALLY NEED IT! FOR A HUGE GRADE!!! PLEASEEEE!!! ❤️
Answer: its D
Explanation:
because the earth sun and moon are all lined up that will cause a solar eclipse.
The type of chemical bond resulting from a complete electron transfer is:
metallic
covalent
radical
ionic
Answer:
ionic / electrovalent bonds
Explanation:
Answer:
4. Ionic
Explanation:
3. Answer INCREASE, DECREASE or REMAIN THE SAME. Explain your answer.
a) The density of water _______ as water changes from liquid to steam.
b) As the temperature increases, the rate of diffusion of a gas _______.
c) At constant volume, if the temperature of a gas is decreases, its pressure _______.
Answer:
a) decrease
b) increase
c) decrease
Explanation:
a) The density of water decreases as water changes from liquid to steam.
The density of substances are higher when their molecules are very close to each other having strongest bonding forces. When water is change from liquid to steam it means water molecules are not close to each other as they are in liquid state because now water is changed into gaseous form and molecules are further apart from each other. Thus, density goes to decrease.
b) As the temperature increases, the rate of diffusion of a gas increase.
As temperature increases molecules gets more kinetic energy and rate of diffusion increases.
c) At constant volume, if the temperature of a gas is decreases, its pressure decreases.
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
As temperature decreases its pressure also goes to decrease and vice versa.
PLS PLS PLS HELP ME I WILL MARK YOU BRAINLYEST JUST PLS :((
Answer:
cytoplasm.....................
what is the definition of phosphates
Explanation:
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Please help ( there was no science option for subject)
This is due in a little while
Answer:
1 solar system, 2 , 3 , 4 hotter, 5 star, 6 the sun, 7 rotated, 8 planets, 9 orbits, 10 direction, 11 gravity, 12 revolve, 13 Mercury, 14 Neptune
Explanation:
I very sorry for not filling in everything but I have a small trick for you to help you out. So if you read out loud each sentence and put one of the words from the word bank in the sentence only a few will make sense. So if you read the second sentence out loud with one of the words that you have and one of them sounds correct then you fill it in. Also like your paper says one word can be used multiple times.
Your welcome :)
what is the formula for Octasilicon triskaidecaphosphide
Answer:
Triskaidekaphobia, or fear of the number 13, does not fit neatly into a clinical definition of a specific phobia. The number 13 is not an object or a situation, and it can be impossible for the sufferer to avoid.
Explanation:
Which reaction is reversible and could reach dynamic equilibrium?
O A. Burning a wood log
O B. Frying an egg
O C. 3H2 + N2 = 2NH3
O D. 2Mg + 02 → 2Mgo
Answer:
The correct answer is - option C. 3H2 + N2 = 2NH3
Explanation:
If in a chemical reaction the rate of the forward reaction and the rate of reverse reaction are equal, this is called dynamic equilibrium. Due to this equal rate of both side reactions, there is no change in the system. In this type of reaction, the concentration of reactants and products remain constant and the overall reaction is continuous.
Dynamic reactions can be reached by reversible reactions such as 3H2 + N2 = 2NH3 where the concentration of hydrogen and nitrogen and concentration of the ammonia remains constant and rate of the both side are equal.
Answer:
3H2 + N2 = 2NH3
Explanation:
Which of these is a distinguishing abiotic feature of the Great Barrier Reef, the
world's largest coral reef?
A. Warm, shallow water
B. Blue skies
O C. Freshwater
O D. Colorful corals
Answer: warm shallow water
Explanation: I’m doing the course on Ape and that was correct
AFTER the digestive system process food, the energy stored in cells as ______________ .
radiant energy
mechanical energy
thermal energy
chemical energy
mass is the amount of
Answer:
Mass is a measure of the amount of matter in a substance or an object
Explanation:
we learned about this on school
What part of a plant is most likely to show negative phototropism
Answer:
Different organs of the plant may exhibit different phototropic reactions to different wavelengths of light. Stem tips exhibit positive phototropic reactions to blue light, while root tips exhibit negative phototropic reactions to blue light. Both root tips and most stem tips exhibit positive phototropism to red light.
Explanation:
What occurs when a solid substance dissolves into a liquid?
A. It stays solid and floats on the top of the liquid substance.
B. It changes the liquid substance into a solid substance.
C. It breaks down and becomes part of the liquid substance.
D. It stays solid and sinks to the bottom of the liquid substance.
Answer:
It stays solid and sinks to the bottom of the liquid substance.
Define compound in your own words
Answer:
I think the compound is a chemical bound the compound o cant say I trying
Explanation:
oh the compound is a chemical substance like atoms like H2O and other atoms they have many compounds I think this should be ans
if its ans is too long you want then tell me in comment
draw the condensed formula of 2 - methyl pentane - 1 ol ?
Answer:
Hope this helped!
How much energy is required to vaporize 18.32 grams of water at its boiling point?
Based on what you have read, write two to three sentences explaining what James Cross Giblin probably wants readers to think about people who focus on difficult goals.
It didnt give me anything to read either
Answer:
Explanation:
The message of the book is that perseverance is necessary for success. If we focus on our goals and learn from others, we will be rewarded in the end.
It's a reap what you sow kind of meaning as well in which perseverance is key for accomplishing our goals.
Answer:
The message of the book is that perseverance is necessary for success. If we focus on our goals and learn from others, we will be rewarded in the end.
Explanation:
this is the answer frm edge
help plz! What chemical makes an object give off light?
Answer:
Its Chemiluminescence makes things glow by creating a chemical reaction.The electrons within the object become excited because of the reaction between two chemicals, and the electrons give off energy by blowing.
Maybe this helps I'm sorry if I got your answer wrong..
Henry sees a basketball and decides to put in motion. What kind of force does Henry
use to move the ball?
Answer:
Unbalanced Energy
Explanation:
:p
draw the ring chain of isomer of propene ?
Explanation:
Molecular formula for Propene = C3H6
The isomer of propene is cyclopropane.
(Draw a triangle to show that it is cyclopropane)
in which shell duplet rule is applied, why?
Answer:
In first shell duplet rule is applied because first shell contains maximum 2 electrons
Explanation:
