Answer:
2835J
Explanation:
Q = mcΔT
Given,
Q = ?m = 45.0 gc = 4.2ΔT = 40-25 = 15°CQ = 45 × 4.2 × 15
Q = 2835 J
the ion with a 3+ charge, 28 electrons, and a mass number of 71
8. A fossil plant that helps support the theory of continental drift is ____.
a. Mesosaurus
b. Glossopteris
c. Glomar
d. Pangaea
Answer:
b.
Explanation:
What would happen if organ system failed to work together
Answer:
if organ systems failed to work together then the body will not function properly and we should not able to do a simple work and suffer from many others diseases.
1. Given the image below, which calculation will NOT give you the correct average atomic mass?
A. (12+12+12+12+12+12+13+13+13+13)
10
B. (60⋅12)+(40⋅13)
C. (0.6⋅12)+(0.4⋅13)
D.
Answer: I think it’s either C or Dz
Explanation:
Due how it’s calculated.
The calculation that will not give the correct average atomic mass is (60⋅12)+(40⋅13).
The average atomic mass is obtained as the sum of the products of the relative abundance of each isotope multiplied by its mass.
There are 6 C-12 isotopes and 4 C-13 isotopes. This gives a total of 10 isotopes of both types.
All calculations of average atomic mass are correct except (60⋅12)+(40⋅13).
Learn more: https://brainly.com/question/13292428
How does latitude
affect climate?
Answer:
as the latitude increases, the intensity of the solar energy that strikes an area decreases,and climates become cooler
Explanation:
The higher the elevation the cooler the air therefore the climate becomes colder.
Why critical thinking is important for chemists?
Answer:
"Critical thinking is the analysis of available facts, evidence, observations, and arguments to form a judgment. The subject is complex; several different definitions exist, which generally include the rational, skeptical, and unbiased analysis or evaluation of factual evidence. Critical thinking is self-directed, self-disciplined, self-monitored, and self-corrective thinking. It presupposes assent to rigorous standards of excellence and mindful command of their use. It entails effective communication and problem-solving abilities as well as a commitment to overcome native egocentrism and sociocentrism." - Searched it up on Wiki, so at least I stated this-.
I hope this helps..?
Answer:
Critical thinking in the area of chemistry requires students to not just think about the concepts and principles of but also how they can be applied to other areas. Critical thinking creates an area of overlapping or related information to the nature of a certain function.
Explanation:
its simple plus hope this helps
Calculate the wavelengths (in Å) for the first six Balmer lines (Ha, Hb, Hg, Hd, He, and Hz)
Explanation:
Transition of n 3→2 6→2
Name -H-α / Ba-α- H-δ- / Ba-δ
Wavelength (nm, air) -656.279 -410.1734
Energy difference (eV)- 1.89 -3.03
Color- Red -Violet
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Calcium and water are the reactants in this chemical reaction. The products are calcium hydroxide and hydrogen gas. Which statement correctly describes the total mass of the products when the reaction is complete?
Explanation:
Using the Law of Conservation of mass,the mass of the reactants should be equal to the mass of the products after the reaction.
Which of the following helps protect species from extinction?
Question 4 options:
laws and policies
wildlife refuges
conservation efforts
all of the above
Answer:
all of the above :)
have a nice day !
Explanation:
Gold can undergo transmutation. Which equation could correctly describe this radioactive decay?
Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper Re + Superscript 4 Subscript 2 Baseline Upper H e
Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper I r + Superscript 4 Subscript 2 Baseline Upper H e
Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper I r + Superscript 0 Subscript negative 1 Baseline e
Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper I r + Superscript 0 Subscript positive 1 Baseline e
um B is the answer on the unit test
Answer:
Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper I r + Superscript 0 Subscript positive 1 Baseline e
Answer: the answer is B
Explanation:
just took the assignment
Stoichiometry: mole/ mole help
Answer:
0.531 moles of CO₂ are formed.
Explanation:
Given data:
Number of moles of CO = 0.531 mol
Number of moles of CO₂ formed = ?
Amount of oxygen = excess
Solution:
Chemical equation:
2CO + O₂ → 2CO₂
Now we will compare the moles of CO with CO₂.
CO : CO₂
2 : 2
0.531 : 0.531
Thus, 0.531 moles of CO₂ are formed.
Which of the following is true of a compound but not a mixture? (1) A compound contains more than one element.
(2) All the nuclei in a compound contain the same number of protons.
(3) A compound may be heterogeneous.
(4) The composition of a compound does not vary
The composition of a compound does not vary because it is made up of fix ratio by mass.
What is compound?A compound is a chemical substance that is composed of more than one element that held together by chemical bonds and produces fix ratio by mass so we can conclude that the composition of a compound does not vary because it is made up of fix ratio by mass.
Learn more about compound here: https://brainly.com/question/634206
Think of a substance that does not dissolve in water. Explain what happens when this substance is added to water.
An example would be oil. Oil is considered to be hydrophobic (which translates to "fear of water" so it is repelled by water). It floats on the top of water, which is why oil spills result in black blobs that float on the surface of the ocean rather than mix underneath the surface.
What type of energy is transferred during heating?
A. Thermal
B. Temperate
C. Convective
D. Conductive
Thank u for helping !:)
Answer:
A.) Thermal
Explanation:
I got it correct on founders edtell
what is the force needed to accelerate a sled with a mass of 2 kg at a rate of 3.0/s²
A. 6.0N
B. 3.0N
C. 1.5N
D. 3.0N
(help asap please I will give brainliest to the correct answer )
Answer:
The answer is option AExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
Force = mass × accelerationFrom the question
mass = 2 kg
acceleration = 3 m/s²
We have
Force = 2 × 3
We have the final answer as
6.0 NHope this helps you
Is there a relationship between low-income neighborhoods and obesity? What do you think are some of the reasons?
Answer:
cheaper foods are usually more processed and unhealthy, therefore, poorer people are likelier to be obese.
Explanation:
A photon has a wavelength of 220 nm. How much energy does the
photon have?
Answer:
The energy of a photon with a wavelength of 350 nm is 5.7×10−19 J .12/05/2
Explanation:
What is neutron?
What is Atom?
Answer:
A neutron is a subatomic particle with no charge and is found in the nucleus of an atom.
An atom is the smallest particle of an element that retains its identity in a chemical reaction.
Explanation:
hope this helps!! p.s. i really need brainliest :)
Answer:
See below.
Explanation:
Neutron is a subatomic particle which has a neutral charge and forms the nucleus of the atom.
Atom is the smallest unit of matter which composes solids, liquids, gases, and plasma.
The synthesis of carbohydrates can be particularly difficult because of the large number of chiral centers and OH functional groups present.
a. True
b. False
what are the mitigating measures for flood,earthquake and fire?
Answer:Securing heavy objects to walls and floors, such as shelves, bookcases, cabinets, and water heaters.
Explanation:
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components.
a. True
b. False
Answer:
true
Explanation:
It is because it appears uniformly in the eye
Which of these characteristics differentiate electrons from protons and neutrons
How many atoms are in 3.5 L of Neon at STP? Show your work
Answer:
0.1734
this is the answer to the question
What is the missing force?
Answer:
The missing force is the 17 newton
Explanation:
When fluids are subjected to increases in pressure they tend to do this.
A.) evaporate
B.) contract
C.) expand
D.) solidify
Answer:
D.) solidify
Explanation:
1.is the light from the christmas tree natural or artificial?
Describe the structure of an Atom (HELP!)
Answer:
The answer is A.
Explanation:
Neutrons and protons are located in the dense middle of the atom called the nucleus, and electrons are located on the electron cloud located outside of the nucleus.
In the diagram below, west is to the left, east is to the right, and the observer is looking toward the north. What is the direction of the wind?
A. NE
B. NW
C. SE
D. SW
What information does an acid or base equilibrium constant give?
The value of the equilibrium constant shows the relative amounts or concentrations of the reactants and products.
Which action will decrease the gravitational force between two objects?
A. Adding mass to one of the objects
B. Increasing the charge on one of the objects
C. Reducing the masses of the objects
D. Moving the objects closer together
Answer: C
Explanation:
The force of gravity is proportional to the amount of mass in the system, and is inversely proportional to the separation distance between the two masses.
Adding mass to one of the objects would increase the gravitational field it produces, which in return increases the force of gravity.
Increasing the charge of one of the objects would technically add mass to the system, but it can be considered negligible. The adding of charge would cause an attraction between the two objects, but that is not the gravitational force. It is the Coulomb force.
Reducing the mass of one of the objects would decrease the gravitational field it produces, which would cause the force of gravity to decrease. This is the answer.
Moving the objects closer would cause the denominator of the force equation to decrease. A smaller denominator would cause the equality to increase, aka the gravitational force.
[tex]F=GMm/r^2[/tex]