Phosphine is an example of a polar molecule with non-polar bonds
PLEASE HELPPP :[
When a chemical change occurs a new substance is created. Harvey put hamburgers on his barbecue, and they cooked. He left fruit out on the counter and they started to rot.
What evidence about chemical changes can Harvey use to support the examples in his experiment?
A.The chemical changes occurred because the chemicals changed.
B. The chemical changes occurred because there was a change in light energy.
C. The fruit and the hamburgers were affected by an increase in heat energy.
D. The fruit and the hamburgers were affected by a decrease in heat energy.
Answer:
C. The fruit and the hamburgers were affected by an increase in heat energy.
Explanation:
One claim Harvey can use to support the examples from his experiment is that the hamburgers and fruits were affected by an increase in the heat energy.
This chemical change is one that is solely driven. This action Harvey is carrying out is cookingWhen meals are cooked, the raw substances undergoes chemical change via the action of heat.Answer:
btw it's not c
Explanation:
a fruit rotting or infected is a chemical reaction therefore,its close to d
A large rift valley can be found along the east coast of Africa. It has been slowly widening over time, and it is now wide enough to contain many large lakes.
Which of these best explains the slow widening of this rift valley over time?
Group of answer choices
Earth's rotation
wind and water erosion
the Moon's gravitational pull
lithospheric plate movement
Answer:
wind and water erosion
Answer:
C is the answer
CAN U GUYS HELP ME ON THIS ONE PLEAASE IM TOO DUMB YO ANSWER THIS ONE IM NOT EVEN LYING TOO PLUS THIS ASSIGNMENT WAS DUE LAST FRIDAY :(
CH3Br Draw out the work for all 4 steps for the Lewis structure.
Grading Criteria:
a. Correctly count the total valence electrons (2pt)
b. Correctly identify and draw the location of the central atom and surrounding atoms. (2pt)
c. Correctly draw the total amount and location of the electrons on the lewis structure. (2pt)
Answer:
For CH3Br, there are a total of 14 valence electrons. Hydrogen always goes on the outside, and since Carbon is less electronegative than Bromine, we'll put the Carbon in the center and the Bromine on top. We have 14 valence electrons for the CH3Br Lewis structure. Put two between atoms to form chemical bonds.
Explanation:
What does an oxygen atom do when becoming an ion?
The object will have a minimum gravitational potential energy at point
A)A B)B C)C D)D
Answer: Decrease
Explanation: The downward slope causes the momentum to decrease in speed rather than increase from an higher point.
Devin had a bucket of shredded metals the metals consist of aluminum steel and copper he tried sorting the mixture by running it through a filter but this did not sort the mixture into separate components what can devin conclude
Answer:
Devin's problem can be solved by exploiting the activity series of metals.
Explanation:
This determines what metals are more reactive and would be readily displaced in a reaction.
Seeing as they are both metals scraps of similar sizes, filtration isn't a solution. But since Copper is lower on the activity series than Aluminium, adding an acidic solution (say tetraoxosulphate VI solution) to the mixture, would have aluminium in solution and Cu as residue which can then be filtered off.
I hope this was helpful.
Un estudiante de noveno año decide realizar varias mezclas de compuestos quimicos y tiene un frasco rotulado con la formula quimica: MgO ¿cual es el nombre del compuesto?
Answer:
- Oxido de magnesio
Explanation:
Mg → magnesio
O → oxígeno
La unión del oxígeno (no metal) con un metal, forma el determinado óxido que se nombra como óxido de .... y el no metal.
En este caso, podemos deducir que el contenido del frasco es de óxido de magnesio, aunque viendo que hay un sólo átomo de oxígeno podemos llamarlo como monóxido de magnesio, similar al CO (monóxido de carbono).
A partir de que el magnesio sólido entre en contacto con el aire, se produce MgO de acuerdo a la siguiente reacción:
2Mg + O₂ → 2MgO
What happens during every chemical change?
A. Heat or light is produced.
B. Two substances combine to make a different substance.
C. One type of matter becomes another type of matter.
D. Matter changes from one state to another.
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Answer:
D
Explanation:
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Answer:
its one type of matter becomes another type of matter
Explanation:
it was that for a p e x
Calculate the wavelength of radiation with a frequency of 7.13 x 1020 s-1
Answer:
λ = 4.2x10^-13 m
Explanation:
c = λν
c is speed of light 3x10^8 m/s
λ is wavelength
ν is frequency
3.10^8 = λ . 7.13 × 10^20
λ = 4.2x10^-13 m
what percent of a sample of a radioactive element whose half life=5.0 years will decay after 25 years?
Answer:
Calculate the rate of decay constant for U-238 if its half-life is 4.468 × 109 years. Answer: If the problem is referring to the half-life, then the ratio of = 0.5 because half of the original sample has already undergone decay.
Explanation:
what layer of the Earth is made of liquid metal?
Answer:
the outer core
Answer:
The outer core
Which metallic crystal structure has a coordination number of 8
Answer:
body-centered cubic
Explanation:
:D
Will mark brainliest for who is right
Which properties change the composition of a substance?
chemical and physical properties
neither chemical nor physical properties
physical properties
chemical properties
What particles form the nucleus of an atoms?
Answer:
Protons and neutrons
Explanation:
The particles to forms the nucleus of an atom are the protons and neutrons of the atoms.
These materials are located in the tiny nucleus and contributes the most mass of the atom.
Protons are the positively charged particles in an atomNeutrons do not carry any charges. Sum of the protons and neutrons gives the mass number of the atom.How many moles of cesium carbonate will be produced when 5.34 moles of cesium reacts with iron (III) carbonate? (You must write and balance the formula equation!)
Answer:
2.67 moles of cesium carbonate (Cs2CO3).
Explanation:
We'll begin by writing the equation for the reaction. This is illustrated below:
Cs + Fe2(CO3)3 —> Cs2CO3 + Fe
The above equation can be balance as follow:
There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by putting 2 in front of Fe as shown below:
Cs + Fe2(CO3)3 —> Cs2CO3 + 2Fe
There are 3 atoms of C on the left side and 1 atom on the right side. It can be balance by 3 in front of Cs2CO3 as shown below:
Cs + Fe2(CO3)3 —> 3Cs2CO3 + 2Fe
There are 6 atoms of Cs on the right side and 1 atom on the left. It can be balance by putting 6 in front of Cs as shown below:
6Cs + Fe2(CO3)3 —> 3Cs2CO3 + 2Fe
Thus, the equation is balanced.
From the balanced equation above,
6 moles of Cs reacted with 1 mole of Fe2(CO3)3 to produce 3 moles of Cs2CO3.
Finally, we shall determine the moles of cesium carbonate (Cs2CO3) produced by the reaction of 5.34 moles of cesium (Cs). This can be obtained as follow:
From the balanced equation above,
6 moles of Cs reacted to produce 3 moles of Cs2CO3.
Therefore,
5.34 moles of Cs will react to produce = (5.34 × 3)/6 = 2.67 moles of Cs2CO3.
Thus, 2.67 moles of cesium carbonate (Cs2CO3) were produced from the reaction.
Which of the following is the best way to model the process of weathering?
Using a fan on a pile of sand causing the sand to move into a pile in a new location.
Using a ramp to dump sand at the bottom causing the sand to pile up.
Using a watering can sprinkle water onto sand causing the sand to move to a new location.
Filling a glass bottle with water and allowing it to freeze causing the bottle to break.
The best model of weathering is using a fan on a pile of sand causing the sand to move into a pile in a new location.
Weathering refers to the gradual breakdown of a rock due to the agents of denudation. The agents of denudation could be physical, chemical or biological.
The breakdown of rocks leads to the formation of soil. The closest model to the weathering of rock is using a fan on a pile of sand causing the sand to move into a pile in a new location.
The pile represents the rock which is being broken down as the fan blows the pile and it settles on a new location.
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What did the Curies demonstrate by studying pitchblende?
A- Uranium is not the only radioactive element.
B- All elements are potentially radioactive.
C-Radium can cause anemia, bone and tissue damage, and death.
D-Uranium salts emit something that can expose photographic film.
Answer:
A- Uranium is not only the radioactive element
if one species of rabbit, the gene for brown fur ( B) is dominant, while the gene for black fur ( b) is recessive. One rabbit has the dominant allele for brown fur and the recessive allele for black fur. Another rabbit has two recessive alleles. If the two rabbits have offspring, what are the odds of one of the offspring having brown fur?
Answer:
1/2
Explanation:
According to this question, the gene coding for fur color in rabbits contains two alleles viz: alelle for brown fur ( B) is dominant, while the allele for black fur ( b) is recessive. This means that an heterozygous rabbit (Bb) will have brown fur.
Based on the question, one rabbit has the dominant allele for brown fur and the recessive allele for black fur i.e genotype Bb, another rabbit has two recessive alleles i.e. genotype bb. If these two rabbits cross i.e. Bb × bb, the proportion of the offsprings produces will have Bb, Bb, bb and bb genotype.
Bb is dominant, hence, 1/2 of the offsprings will be brown furred.
one species of rabbit, . the two rabbits have offspring, what are the
Which is heavier, calcium or selenium?
Answer:selenium
Explanation:
Answer: Nether
Explanation: Because if you have one pound of Calcium and one pound of selenium there both the same weight
Which of the following is a component of natural gas? A)gasohol B)methane C)gasoline D)kerosene
Answer:
Methane
Explanation:
It is methane because, it comes from natural sources.
How many electrons are gained in the half-reaction 02, + electrons — 202-
Answer:
2
Explanation:
A
Answer: 4!!!
Explanation: j took the quiz!!!
When you have been swimming and you come out of the pool, you may feel cold. Use your understanding of endothermic processes to explain why?
Answer:
An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.
How much energy would be required to heat 10.0 g of water at 0 degrees C to 100 degrees C,and change it into steam at 100 degrees C
Answer:
Q = 4180 J
Explanation:
Given data:
Mass of water = 10.0 g
Initial temperature = 0°C
Final temperature = 100°C
Heat required = ?
Solution:
Specific heat capacity of water is 4.18 j/g.°C.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 100°C - 0°C
ΔT = 100°C
Q = 10.0 g ×4.18 j/g.°C × 100°C
Q = 4180 J
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. What best explains the increase in the size of the panther population?
Explanation:
Because the panthers live in the southeastern region of the United states they have increased in population in that region. They have been able to gain more food and have adapted more to there environments. Which allows to increase and reproduce more. That is why the Panthers in the southeastern United states have increased In population. I hope this works for you and that it helps. I don't mind helping someone who has a question! From, me.
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. More panthers were born than died explains the increase in the size of the panther population.
What is the largest panther in the world?The jaguar, also known as the panther, tigre, or onza, is the world's largest and most powerful cat. Human activities endanger this cat, as they do the Florida panther (Puma concolor).
Because the anteater population will have fewer energy storage molecules available due to the smaller ant population, the anteater population will reproduce less.
Panthers can be found in the southeastern United States. The region's panther population has grown over the last 50 years. Because no animal eats panthers, the panther population is always growing.
Thus, More panthers were born than died explains the increase in the size of the panther population.
To learn more about the panther, follow the link:
https://brainly.com/question/28060154
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science againnnnnn helppp!!!!!
Answer: this is not my own words :)
Learn how factors, such as exposure to the atmosphere, the composition of rock and climate affect the rate of weathering. Weathering is the mechanical or chemical process by which rocks are broken down. The weathering that happens to rocks can be understood by relating it to the digestion of a chocolate chip cookie
One of the factors that affects the rate of weathering is exposure to the atmosphere. ... Another factor that affects the rate of weathering is the composition of rock. Rocks are composed of minerals, which are solid substances found within rocks that have their own distinct chemical composition.
Atoms tend to form compounds because they have an unstable number of ___
A. Protons
B. Isotopes
C. Valence electrons
D.neutrons
what is an electrical force? just like the definition of an electrical force
Answer:
The attractive or repulsive interaction between any two charged objects is an electric force
Explanation:
that's the definition
Ian uses litmus paper to determine whether five unknown solutions are acids or bases. The litmus paper turns red when the pH is 4.5 or below and blue when the pH is 8.2 or above. Ian records the results in the data table.
Ian accidentally spills a beaker of an unknown solution. It splashes onto the strip he used to test Solution 1, and the strip turns from red to blue. Based on this observation, which conclusion could Ian make about the solution that he spilled?
Answer: b
explanation: i had the question on a test and got it right.
12) A 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. What is the density of the copper sample?
Hey there!:
Mass = 17.92 g
Volume = 2.00 mL
Density = ??
Therefore:
D = m / V
D = 17.92 / 2.00
D = 8.96 g/mL
Hope this helps!
The density of an object is obtained as the ratio of mass of an object to its volume.
In science, density is defined as mass per unit volume. The volume of an object is the same as the volume of water displaced by the object.
Since the volume of water rose by 2.00 mL, then the volume of copper is 2.00 mL.
The density is now; mass/volume
Mass = 17.92 g
Density = 17.92 g/2.00 mL
= 8.96 g/ml
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Explain why both a power source (like a battery) and a complete circuit are necessary for an electromagnet to function.
this is science homework by the way, please help me with it:)
Answer:
Electromagnets are only functional when electricity is passing through them. In other words, they only create a magnetic field when there is an electric current flowing.
A power source like a battery is therefore necessary to supply the electric current necessary for the magnet to work however, it will not work unless the circuit is closed as electricity cannot not flow in an open circuit because current needs to be able to flow from one end of a power source to the other end.
Explanation:
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