Answer:
(D) greater than the energy stored in the bonds of the products.
Explanation:
Exothermic reaction refer to those reactions in which energy is released to the surrounding, unlike endothermic reactions where energy is absorbed from the surroundings.
In exothermic reactions, the change in energy; ΔH less than zero. That is, they are negative.
ΔH = H (products) - H (reactants)
For ΔH to have a negative value, it means the energy of reactant must be greater than the energy of products.
This means the correct option is;
(D) greater than the energy stored in the bonds of the products.
In an exothermic reaction the energy of the reactants bonds has been higher than the energy of the product bonds. Thus, option D is correct.
The exothermic reaction has been given as the chemical reaction in which there has been the liberation of energy by the reactants in the process of formation of products.
The energy change in the reaction has been a negative value. In the process of product formation, the energy of the system has been conserved. It stated that the energy of the reactant has been equivalent to the energy of the product and the liberated energy.
With the product being consisted of less energy, the energy stored by the chemical bonds in the reactants has been higher than the energy stored by the product. Thus, option D is correct.
For more information about the exothermic reaction, refer to the link:
https://brainly.com/question/14969584
Question 11 of 32
When do scientists form a hypothesis?
A. Before they form a theory
B. After they form a theory
O C. Before they perform an experiment
D. After they perform an experiment
SUBMIT
Answer:
C
Explanation:
a hypothesis always comes first
Answer:
C
Explanation:
They form hypothesis first, then perform the experiment to test the hypothesis. After multiple experiments, they form a theory.
Thus C is correct
please give thanks by hitting that heart button :)
he amount of sun that an area receives affects the movement of water through the water cycle, which is illustrated below.
water cycle diagram
Which of the following processes in the water cycle is most directly caused by water absorbing energy from the sun?
Group of answer choices
precipitation
condensation
evaporation
runoff
Answer:
evaporation
Explanation:
The process of evaporation is as a result of water absorbing energy from the sun.
The process is a phase change in which liquid water changes into gaseous form.
The water in gaseous form is called vaporThis water cools and condenses in the atmosphere as it loses the energy it has gained. For evaporation to take place, water must absorb energy from the sun or other heating bodies. This will then cause vaporization of the liquid water into a gaseous form.536 cm 53.6 greater, less or equal
Answer:
they are equal
Explanation:
=
Answer:
well i think if im remember correctly 536 is greater than 53.6 but i may be wrong please tell me if i am
Explanation:
materials that prevent the heat to flow call
Answer:
Materials that prevent heat to flow are known as heat insulators.
Explanation:
hope it helps! ฅ'ω'ฅ
Which reverses the flow of current through an electric motor?
A brush
B battery
C armature
D commutator
Answer:
D
Commutator is the answer
Explanation:
The commutator systematically converts the current direction between the rotor and the outer circuit. As the shaft revolves, the commutator converts the course of current in a winding. For a separate armature winding, when a cylinder has reached one-half perfect turn, the winding is now attached so that current passes through it in the reverse of the original direction.
Answer:
D. Commutator
Explanation:
I just took the quiz. credit to the person above me.
What happens in a chemical reaction and what does it require
Answer: i need a pic of it plz
Explanation:
plx
Two samples of aluminum foil, 27 grams and 54 grams, are cut out from a roll. Which of the following properties is different for the two
Explanation:
For the two samples, the mass and volume of the foil are different but irrespective of this, the density of the aluminum foil will remain the same.
Density is an intensive property of matter. It does not depend on the amount of matter present within the substance. Density is the mass per unit volume and for every sample of a compound, it has the same amount.Mass depends on the amount of matter present and as given in the description, the sample with a high number has more mass.
Volume is the amount of space a substance occupy.
Answer:
amount of matter
Explanation:
I am lost someone help me!!
Try tissue
Explanation:
Which elements are both classified as metalloids?
Ge and As
Bi and Po
B and C
Si and P
Please help! This is due in 10 minutes!
Answer:
Nitrogen-15
Explanation:
To use the correct notation, you need to use the mass number. The mass number is the number of protons plus the number of neutrons. Nitrogen has 7 protons. This isotope of nitrogen has 8 neutrons.
The correct notation is nitrogen-15.
Which of the following correctly describes a proton? Group of answer choices Location: nucleus, contribution to mass: usually about half, charge: positive Location: nucleus, contribution to mass: virtually none, charge: positive Location: outside nucleus, contribution to mass: usually about half, charge: positive Location: nucleus, contribution to mass: usually about half, charge: none
Answer:
Location: nucleus, contribution to mass: usually about half, charge: positive
Explanation:
Protons are a part of the nuclear particles alongside the neutrons. Protons and neutrons are all together called sub-atomic particles and they share the nucleus at the center of an atom together.
Protons carry positive charges. They determine the mass of the atom alongside the neutrons. They contribute half to the mass of an atom and the other part is lies on the mass of a neutron. Neutrons do not carry any charges.In a covalent compound like O2, two pairs of electrons are shared between the atoms. What is the name given to a bond like this?
Explanation:
The bond is a covalent bond.
element compound mixture
how many molecules of H3PO4 are in 125 g of H3PO4
Answer:
2.11 * 10^3 molecules of phosphoric acid
Explanation:
What is causing the Hot Springs to be so hot? What is causing Hot Springs to be so acidic?
Answer:
Hot springs are hot because of geothermal heat. The Hot springs are acidic because hydrogen sulfide and carbon dioxide get in touch with water they evaporate which causes acid.
Explanation:
7. Which part moves the blood away from the heart?
10 bonta
O a. capillaries
b. veins
a carteries
O d. blood vessels
Answer:
Veins
Explanation:
Veins, which usually look blue, return blood to the heart.
1 What is the approximate altitude of Polaris when viewed from New York City?
Answer:
44° to 45°
Explanation:
The altitude of Polaris star when viewed from New York City is somewhat between 44° to 45°. However, Polaris is directly overhead at the North Pole (90° of latitude); in other words, the angle between Polaris and the horizon at the North Pole is 90°. This angle is called "the altitude" of Polaris.
The process of burning a fossil fuel to release energy is called
Answer:combustion
Explanation:
What mass of gold (Au) contains the same number of atoms as 2.61 g of aluminum (Al)?
Answer:
19.11g
Explanation:
mole = mass ÷ molar mass
mole = 2.61 ÷ 27
mole = 0.097mol
Number of atoms in 2.61g of Aluminum = 6.022 × 10^23 × 0.097
= 0.584 × 10^23
= 5.84 × 10^22atoms
To get the same number of atoms for Gold (Au), we multiply the atomic mass of Au by 0.097mol
Atomic mass of Au = 197g/mol
mass = mole × molar mass
mass = 0.097 × 197
mass = 19.109g
mass = 19.11g
Which of the following steps will slow down the reaction between coal and oxygen?
Answer:
decrease temperature of the oxygen
Explanation:
Answer: I believe it it decrease temp of oxygen
Explanation:
A syringe with 32.0 mL contains gas at 649.0 mmHg. The plunger is pushed in and now the volume is 19.5 mL. What is the new pressure?
Answer:
1.40 atm
Explanation:
P1V1 = P2V2
P2= P1* V1/V2
P1=649.0mmHg
V1= 32.0mL
V2= 19.5mL
P2=649.0mmHg*32.0ml/19.5ml=
1065.03mmHg
To get mmHg to atm. The formula is 1atm/760mmHg
Use the answer you got in mmHg to convert into (atm), If you were asked
1065.03mmHg*(1atm/760mmHg)= 1.40atm
can bees really fly if so why
A salt forms in the reaction of aluminum with chlorine. What is the most likely formula unit of this salt
Answer:
AlCl3
Explanation:
since the stable oxidation state of Aluminum is +3, and that of Chlorine is +1, then it will give such a formulae ✔️
help pls i give 20 points
Which force saves the atom by emitting particles from the nucleus
Answer:
nuclear force
Explanation:
Values of R, the ideal gas constant, and the ideal gas equation are given below. Use these to solve the problems.
PV = nRT
A 10.0-L rigid container holds 3.00 mol H2 gas at a pressure of 4.50 atm. What is the temperature of the gas? (Round to the nearest whole number)
K
Answer:
183 K
General Formulas and Concepts:
Chemistry - Gas Laws
Combined Gas Law: PV = nRT
P is pressureV is volume (in Liters)n is amount of molesR is gas constant - [tex]0.0821 \frac{L \cdot atm}{mol \cdot K}[/tex]T is temperature (in Kelvins)Explanation:
Step 1: Define
10.0 L
3.00 mol H₂
4.50 atm
Step 2: Find Temperature
Substitute [CGL]: [tex](4.50 \ atm)(10.0 \ L) = (3.00 \ mol)(0.0821 \frac{L \cdot atm}{mol \cdot K})(x \ K)[/tex]Isolate temperature x: [tex]\frac{(4.50 \ atm)(10.0 \ L)}{(3.00 \ mol)(0.0821 \frac{L \cdot atm}{mol \cdot K})} = x \ K[/tex]Rewrite: [tex]x \ K = \frac{(4.50 \ atm)(10.0 \ L)}{(3.00 \ mol)(0.0821 \frac{L \cdot atm}{mol \cdot K})}[/tex]Evaluate: [tex]x = 182.704 \ K[/tex]Step 3: Check
Round to the nearest whole number.
182.704 K ≈ 183 K
10 points Which of these is the best example of heat transfer by radiation? *
1 point
a) A satellite is warmed by sunlight.
b) A ceiling fan cools a warm room.
c) Butter melts on warm bread.
d) Puddles of water cool a warm tile floor.
Answer:
a) A satellite is warmed by sunlight.
Explanation:
Heat transfer by radiation mostly involves heat gain or heat loss from the Sun. In this case, Option A is the only option where sunlight is involved so it is the best example of heat transfer by radiation.
whats the answer giving brainliest :))))
Answer:
D
Explanation:
Because B and C are talking about the climate. And A is just saying something general about the climate! :)
Answer:
d
Explanation:
Use The diagram to make some observations about how he does transferring in each of these situations
do you have some examples or options to answer ?
what is the difference between saturated and unsaturated hydrocarbons
Answer:
Unlike saturated hydrocarbons in which all hydrogen atoms and carbon atoms are bonded together with single bonds, unsaturated hydrocarbons have double or even triple bonds between the carbon atoms.
