Answer:
A and C
Explanation:
I can help you with A and C but I don't have the enthalpy calculation handy to perform the calculation.
A. You are breaking the Carbon-Hydrogen bonds in methane CH4 and the Oxygen-Oxygen bond. You are forming bonds between Carbon and Oxygen to form CO2 and you are forming bonds between Hydrogen and Oxygen to form water.
B. skipped
C. The reaction is exothermic. The reaction is burning methane in oxygen. This reaction will give off heat which is the definition of exothermic.
would coal be considered a mineral (yes or no) Why or why not
Answer:
It's classified as an organic sedimentary rock
Explanation:
What's the deal with coal? It's classified as an organic sedimentary rock, but rocks are combinations of minerals, and minerals are inorganic. ... So yes, coal is classified as an organic sedimentary rock, and yes, rocks are supposed to be made of minerals and minerals can't be organic.
Which of these statements accurately describes monomers?
Monomers are macromolecules.
Monomers contain double bonds.
Monomers are made of repeating units.
Monomers contain bonds between metals.
Answer:
monomers contain double bonds
Explanation:
Answer:
B.Monomers contain double bonds.
Explanation:
Please answer these questions.. please
Brainliest!
Ionic or Covalent bond??? Cu, and F
Answer:
Ionic
Explanation:
Main distinction between ionic and covalent bonding
What is the main distinction between ionic and covalent bonding? Electrons aren't equally shared in an ionic bond. The electronegativity difference is closer to zero in a covalent bond. ... If the difference is large, the bond is ionic.
Assuming that water is made of tiny little water molecules, would you say that water molecules are attracted to one another, repelled by one another, or are kind of neutral about each other?
-attracted to one another
-repelled by one another
0kind of neutral about each other
Answer:
attracted to one another
Explanation:
water is cohesive
When counting the electron groups around the central atom to determine its shape, select the 4 ways that electron groups would be counted
When radioactive uranium decays to produce thorium, it also emits a particle. As seen in the balanced nuclear equation, this particle can BEST be described as
Answer:
an alpha particle or helium nucleus
Explanation:
Uranium spontaneously undergoes alpha decay. During an alpha decay, the uranium nucleus spontaneously decays to produce a thorium nucleus, alpha particles and energy.
The balanced nuclear equation is shown in the image attached to this answer for clarity.
The decay of uranium to thorium has been best described as the alpha decay.
The nuclear decay has been given as the decomposition of the atom by emitting radiations. The emission has been responsible for the change in the nucleus of the atom to the daughter nuclei with smaller mass.
The decay of Uranium to thorium has been the spontaneous alpha decay. There has been the loss in the mass of uranium in the form of energy, resulting on the thorium nucleus.
Thus, the decay of uranium to thorium has been best described as the alpha decay.
For more information about the nuclear decay, refer to the link:
https://brainly.com/question/14077220
Hi i need help please. I have to list the following forms of lights from lowest energy to highest energy:
red lights, violet lights, gamma rays, microwaves, infrared light, and radio waves. Thank you so much!
Answer:
radio waves, microwaves, infrared light, red lights, violet light, gamma rays
find the temperature change of water when the mass is 45.0g and the intial temperature is 20.0C
Answer: The answer is 41.5 C
(45.0 g)(x - 20 C) = (22.3 g)(85 C - x )
45.0x + 900 C = 1895.5 C - 22.3x
+22.3 x - 900 C = -900 C + 22.3 x
67.3x = 2795.5
2795.5 / 67.3 = 41.54 C
Explanation:
C connected to 2 H's by 1 line each and to O with 2 lines. The O has 1 pair of dots above and 1 pair of dots below.
How many electrons do carbon and oxygen share?
Answer:
4
Explanation:
I just got it right on one of the assignments in Edge2020.
Answer:
The answer is 4
Explanation:
Please answer it’s due today. I will give brainliest
Answer: It depends
Explanation: If you’re using an electric kettle then yes, it’s true!
Which option is an example of a physical property?
A flammability
B solubility
C reactivity
D toxicity
How many moles are in 2.5 * 10^20 iron atoms?
Answer:
The answer is 0.0004 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{2.5 \times {10}^{20} }{6.02 \times {10}^{23} } \\ = 0.000415282...[/tex]
We have the final answer as
0.0004 molesHope this helps you
i need help !! if anyone could help that would be good!!
Region A ⇒ group 2
Further explanationValence electrons are electrons used in a chemical bond , and in an atom's outermost energy level
The periodic system of elements is an arrangement of elements classified based on similar properties and their atomic number order.
The periodic system is divided into groups (vertical order) and periods (horizontal order)
In the periodic system
The group number in the periodic system is determined by the same valence electrons (main group), while the period is determined by the number of shells
The 2 valence electrons are in group 2
A : group 2 : Valence electrons =2
B: group 13 : Valence electrons = 3
C : group 15 : Valence electrons = 5
D : group 16 : Valence electrons = 6
Which of the following equations follows the Law of Conservation of Mass? 65
(5 Points)
3H2O --> 3H2 + 3 02
C2H4 + 3 02 --> 2 CO2 + 2 H2O
C + 4H2 --> CH4
2Na + Cl --> NaCl
ILL MARK YOU AS TOP COMMENT
Answer:
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
Explanation:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
3H₂O → 3H₂ + 3O₂
This equation do not follow the law of conservation of mass because there are more oxygen atoms on right side so mass is not conserved.
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
This equation follow the law of conservation of mass because there are equal number of atoms of all elements on both side of equation.
C + 4H₂ → CH₄
This equation do not follow the law of conservation of mass because there are more hydrogen atoms on left side of equation so mass is not conserved.
2Na + Cl → NaCl
This equation also do not follow the law of conservation of mass because there are more sodium atoms on left side of equation so mass is not conserved.
When heat is produced by a reaction, would you call it a chemical change?
Answer:
However, in this case, one compound is mixed in with another, and these reactants produce a product. When the reactants are mixed, the temperature change caused by the reaction is an indicator of a chemical change. This reaction generates heat as a product and is (very) exothermic.
Explanation:
Answer:
Thermal change
Explanation:
Use the diagram to answer each question.
Rock Stress
с
D
Compare diagram B to diagram A. How is it different?
Answer:
c is more compressed than d
Explanation:
which non metal is the most reactive?
lithium
cesium
chlorine
iodine
Answer:
iodine
Explanation:
What type of energy results from the position of an object?
1.kinetic
or
2.potential
Answer:
kinetic energy
Explanation:
The substances at the beginning of a reaction are called _______ while the substances at the end of a reaction are called _____.
products, reactants
reactants, products
Answer:
reactants, products
Explanation:
Which is true about what models allow us to do to the system being studied? Question 8 options: Increase the amount of waste produced. Decrease what we learn about a system. Decrease the amount a system is studied. Increase the size of a very small system, allowing easier understanding of what is occurring.
Answer:
Increase the size of a very small system, allowing easier understanding of what is occurring.
Explanation:
Models allow us to increase the size of a very small system, allowing easier understanding of what is occurring .
This can be explained with the help of an atom model. An atom model helps students understand what is happening inside the atom by making the atom large enough to be seen with the naked eye. Once the thing can be seen with the eyes it is easier for the brain to interpret chemical reactions or chemical charges inside the atoms.
whay are shakespeare's plays considered difficult for modern students to understand
Will award 40 points! Is my answer correct??
Why are atomic masses not whole numbers?
What do you call a combination of potential and kinetic energy?
Calculate the quantity of heat in joules required to completely vaporize 100 grams of H2O() at 100.°C and 1.0 atm.
Answer:
required to completely vaporize 102.3 grams of H2O(l) at 100°C and 1.0 atm. 1.
Explanation:
The top layer of a flat lying sedimentary rock is the…
A:Most Eroded
B:Most Under Formed
C:Oldest
D:Youngest
Answer: D
Explanation:
Answer:
youngest (D)
Explanation:
What gas do animals give off in the dark?
Explanation:
Animals give off carbon dioxide and plants make oxygen by carbon dioxide.
Choose the word that best completes the sentence.
Column A
1.
The positive subatomic particle is called the:
The positive subatomic particle is called the
2.
The negative subatomic particle is called the:
The negative subatomic particle is called the
3.
The neutral subatomic particle is called the:
The neutral subatomic particle is called the
Column B
a.neutron
b.electron
c.protist
d.proton
e.eukaryote
Answer:
1. proton
protist
2. electron
eukaryote
3. neutron
Which statement about organisms in the fossil record is correct? A.Organisms show a decrease in diversity only right before an extinction event. B.Organisms show a steady increase in diversity, interrupted by extinction events. C.Organisms show a steady decrease in diversity, interrupted by extinction events. D.Organisms show an increase in diversity only right after an extinction event.
Answer:
Organisms show a decrease in diversity only right before an extinction event.
Explanation:
Extinction is the termination of a kind of organism or of a group of kinds. This brings to an end the existence of a particular specie of organisms.
Extinctions occur only after there is a decrease in the diversity of a specie due to specific conditions such as predators, loss of habitat etc that makes the members of that specie to become endangered.
