0
Rule 1 states that the oxidation numbers of an atom in an element is always 0, so the oxidation number for Ca in the metal and O in O2 have oxidation numbers of zero
hope this helped :)
22 Directions: Select the correct food web. In Ottawalley National Park, grass is abundant. Gazelles spend most of the day feeding on grass, their main source of food. Gazelles are hunted and eaten by the park's wild dogs. Lions are a predator of both wild dogs and gazelles. Which of the following food webs best represents the relationships described above? lion lion wild dog - wild dog gazelle gazelle grass grass lion lion wild dog wild dog gazelle gazelle grass grass
Answer:
Explanation:
22 Directions: Select the correct food web. In Ottawalley National Park, grass is abundant. Gazelles spend most of the day feeding on grass, their main source of food. Gazelles are hunted and eaten by the park's wild dogs. Lions are a predator of both wild dogs and gazelles. Which of the following food webs best represents the relationships described above? lion lion wild dog - wild dog gazelle gazelle grass grass lion lion wild dog wild dog gazelle gazelle grass grass
Answer:
its the 4th one i just did it on study island
Explanation:
What best describes the bromide ion that forms?
It is a negative ion that has one less valence electron than a neutral bromine atom.
It is a positive ion that has one less valence electron than a neutral bromine atom.
It is a negative ion that has one more valence electron than a neutral bromine atom.
It is a positive ion that has one more valence electron than a neutral bromine atom
It is a negative ion that has one more valence electron than a neutral bromine atom. All atoms of the element potassium have 19 protons.
Answer:
I think It's C
Explanation:
I'm doing it on edge
According to this chemical equation which molecules represeny the products 4fe+3O->2fe2O3 A iron B iron and oxygen C iron oxide D iron oxygen and iron oxygen
Answer: C. iron oxide
Explanation:
In a chemical reaction , the reactants are written on the left hand side followed by a rightarrow and then products are given on the right side of the arrow.
In the given chemical equation :
[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
Reactants are iron (Fe) and oxygen [tex](O_2)[/tex] and product is iron oxide [tex](Fe_2O_3)[/tex].
Use the periodic table to write the electron configuration of selenium (Se).
Answer:
1s^22s^22p^63s^23p^64s^23d^104p^4
Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 p4
Explanation:
PLATO correct
What is the correct electron configuration for Si (atomic number 14)?
A. 1s2 2s2 2p6 3s2 3p2
B. 1s2 2s2 2p6 3s2 3p3
C. 1s2 2s2 2p6 3s1 3p3
D. 1s2 2s2 2p6 3s2 2d3
Answer:
1s2 2s2 2p6 3s2 3p2
Explanation:
you're welcome
If a sodium ion (Na+) has a positive charge and loses an electron when combined with chlorine, will the sodium atom become a new element? Why or why not?
Answer:
No
Explanation:
loss of electron doesn't affect the element.
only change in proton number can, as we notice in nuclear chemistry.
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SITUATION # 2: Every morning we drink milk to strengthen our bones. You
prepare a 100ml with a 5% powdered milk mix solution for your mother.
She asks you how many grams of milk you used for her drinks. What
would be your response to her question?
The amount of milk present on 5 % of 100 ml milk powder solution is 95 grams.
The solution was prepared by dissolving 5% milk powder in 100 ml of the solution.
The amount of milk powder will be = [tex]\rm 100\;\times\;\frac{5}{100}[/tex] ml
The amount of milk powder = 5 ml.
The amount of milk = Total - amount of milk powder
The amount of milk = 100 - 5
The amount of milk = 95 ml.
Since the density of milk = 1 gm/ml
The amount of milk in 95 ml of solution = 95 grams.
In the solution of 5 % milk powder in 100 ml milk, there would be 95 grams of milk.
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If you are following the recipe for a cake, how will the order in which you add the ingredients affect the mass of the batter? (1 point)
A. It will have no effect because the order in which ingredients are mixed will not change the fact that matter cannot be created nor destroyed.
B. If you add the liquid ingredients first, the final result will have less mass than if you added the dry ingredients first. This is because the dry ingredients will dissolve in the liquid ingredients.
C. If you add the dry ingredients first, the final result will have less mass than if you added the liquid ingredients first. This is because the dry ingredients will be dissolved by the liquid ingredients.
D. It will have no effect because heating an object never produces a chemical change and only chemical changes can create or destroy mass.
In cake, the ingredients have been changed to the baked cake, so the order of putting the ingredients has no effect on the mass of matter. Thus, option A is correct.
The baking of cake has been corresponds with the addition of the ingredients, thereby process mixing in order to create the reactant mixture that has been heated at the specific temperature for a specified time period. The resultant has been the baked cake matter.
The reagents and products all are matter, and baking has been the chemical reaction. According to the law of conservation of mass, matter cannot be created nor be destroyed in a chemical reaction; it can be changed from one form to another.
In cake, the ingredients have been changed to the baked cake, so the order of putting the ingredients has no effect on the mass of matter. Thus, option A is correct.
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what is a solvent using your own words
Answer:
a substance that dissolves another to form a solution: Water is a solvent for sugar.
Answer:
a liquid that you can add to dissolved other materials
Explanation:
BRAINLIEST IF RIGHTLet’s imagine now that you are in a spaceship in outer space, far from any stars or planets, where there is no air. If you fire the rocket engine, an unbalanced force is created that propels your spaceship forward.
What will happen when you turn off the rocket engine?
Group of answer choices
The rocket's velocity will decrease over time and distance.
The rocket will stop immediately.
The rocket will continue to travel at a constant velocity.
The rocket's velocity will increase with time and distance.
Answer: b
Explanation:
Answer:
C
Explanation:
Obviously, as there is no air to create friction or any opposing force against the rocket; and there is no force accelerating it.
The rocket will maintain its velocity
Which statement best compares bacteria and fungi?
O Most bacteria and fungi are harmless and may be beneficial to other
living things.
Bacteria are living organisms, whereas, fungi are not.
Bacteria and fungi always cause infectious diseases.
Both bacteria and fungi rely on living organisms to reproduce and survive.
Answer:
Both bacteria and fungi rely on living organisms to reproduce and survive.
Most bacteria and fungi are harmless and may be beneficial to other
living things. So, the correct option is (A).
What are Bacteria and Fungi?Bacteria and fungi are two types of organisms that belong to different class of organisms while they are prokaryotic and eukaryotic in nature respectively. They are present in various life forms like parasitic (bacteria), saprophytic (fungi) etc. They are harmless in nature and can be beneficial to other living things as well.
They have mutual relationships with other living organisms, which are beneficial to both.
For example, some species of bacteria help fix nitrogen in the root nodules of leguminous plants, while fungi form a mutualistic relationship with algae called lichens where they benefit each other in one way or another.
Thus, most bacteria and fungi are harmless and may be beneficial to other living things. So, the correct option is (A).
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Both destructive and constructive, the natural event seen here, is important in destroying and creating landforms on
Earth. What is this event called?
A)
deposition
B)
flooding
o
landslide
D)
sedimentation
Answer:Landslide
Explanation:
Just did this question.
Answer:
tn
Explanation:
Please help!!!
Which statement best defines the relationship between work and energy?
O Work can transfer energy between objects and increase radiant energy.
Work can transfer energy between objects and cause a change in the form of energy.
Work can transfer energy between objects and decrease nuclear energy.
O Work can transfer energy between objects and cause a change in the amount of total energy.
Answer:
Its B
Explanation:
I just did the test on edge.
Answer: its B
Explanation:I need points.
Describe the heart and it’s function
Answer:
The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.
Explanation:
Hope this helped! Good luck on whatever it is you're working on!
Answer:
The heart is a cardiac muscle,which is specialized to pump blood powerfully and efficiently throughout our entire life time.
Explanation:
I really hope this helps.
Which answer tells the reason the earth’s climate is getting warmer?
a. Large glaciers are melting in Antarctica.
b. The earth is moving closer to the sun.
c. Driving cars gives off gases that trap heat in the atmosphere.
d. Too many animals are becoming extinct.
if right i give brain 5 star and thx
Answer:
The correct answer is C) Driving cars gives off gases that trap heat in the atmosphere.
Answer:
the answer is c
Explanation:
Which of these structures is least in danger of chemical weathering?
a bridge made of iron rods
a pile of tiles made of feldspar
a bench made of composite plastic
a statue made of marble
Help please!!!
Is tap water electrolytes or not?
Is ethyl alcohol solution electrolytes or not?
Is pure sodium chloride electrolytes or not?
Answer:
Tap Water: Tap water has Electrolytes
Ethyl alcohol solution: Ethyl alcohol solution has no electrolytes
Pure sodium chloride: sodium chloride has electrolytes.
Explanation:
Hope that helps
Explanation:
1, tap has water electrolytes
2, Ethyl alcohol soultion does not have electrolytes
3, Pure Sodium Chloride does have Electrolytes
True or False: Quantitative data is about a description or observation and qualitative data is about measurements and numbers. Please help in under 20 min,
Answer:
False
Explanation:
Quantitative data is measured using numbers and Qualitative data is descriptive
The speed of someone running 5 miles in 45 minutes
Answer:
9 is the answer
Explanation:
because u need to divide 45 from 5 which is 9
Answer:
9
Explanation:
Which of the following is a true statement about heat transfer through conduction, convection, or radiation?
A. Heat NEVER travels in a similar pattern.
B. Heat ALWAYS flows from cooler objects to warmer objects.
C. Heat ALWAYS flows from warmer objects to cooler objects.
D. Heat is NOT related to temperature differences.
Answer:
It's (A)
Because: No, heat can only travel through solids by conduction.
Answer:
Heat ALWAYS flows from warmer objects to cooler objects.
Explanation:
Heat always transfers from warmer objects to cooler objects. For example, if you put a piece of ice in your drink, heat from your drink transfers into the ice, thus, cooling your drink and melting the ice.
What is the total number of Joules lost when 10. grams of water at 80.°C is cooled to 60.°C?
Answer:
The total number of Joules lost to the surrounding is -837.2 J
Explanation:
Given that:
mass = 10 grams
initial temperature = 80°C
Final temperature = 60 °C
Specific heat of water= c = 4.186 J/g. °C
The total number of Joules lost can be determined by finding the amount of heat energy Q released by using the formula:
Q = mC ΔT
Q = 10 × 4.186 × (60 - 80)° C
Q = 10 × 4.186 × - 20° C
Q = -837.2 J
Thus, the total number of Joules lost to the surrounding is -837.2 J
What happens to the anode in an electrochemical cell?
A. It gains electrons.
B. It loses mass.
C. It gains mass.
D. It becomes electroplated.
Answer:
I think it bbbbbbbbbbbbb
Answer:
B
Explanation:
Hope this helps!!!
A student was assigned to take water samples from a lake near his home. He measured the pH of one of the water samples to be 6.0. Which of the following best describes this sample of water?
O Highly acidic
Slightly acidic
O Highly basic
Slightly basic
Answer: I'm guess I ok? Also this is what I think and did put in mine.
Explanation: I think it's "B.- Slightly Acidic" sorry if too late
Chemicals that are able to slow or stop the reaction rate are inhibitors. reactants. products. catalysts.
Answer:inhibitors
Explanation:
I just took the quiz .
Answer:
answer is (A inhibitors)
Explanation:
Which nonprescription drug is commonly abused by teens?
Ritalin
aspirin
OxyContin
cough syrup
Report the problem to the local authorities.
Answer:
D. Cough syrup.
Explanation: This is the correct answer on Edge 2021, just took the quiz. Hope this helps ^-^.
Cough syrup nonprescription drug is commonly abused by teens.
What is Cough syrup?There is a non-opioid cough suppressant in this product (such as chlophedianol, dextromethorphan). It works on the cough center in the brain to help you stop coughing.
Moreover, this medicine contains an antihistamine, such as triprolidine, chlorpheniramine, or doxylamine, which blocks the effects of a natural chemical called histamine, which is responsible for allergy symptoms.
Before taking this medicine for a persistent cough brought on by smoking or a cough with excessively thick mucus, consult your doctor. The safety or effectiveness of cough-and-cold remedies in children under the age of 6 has not been established.
Therefore, Cough syrup nonprescription drug is commonly abused by teens.
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which sentence describes two atoms that form a covalent bond?
Answer:
its D
Explanation: just took the test got it right
Option : D
The difference in electronegativity of two atoms should be less than or equal to 1.7 to form a stable covalent bond.
What is covalent bond?A covalent bond is the mutual sharing of one or more pairs of electrons between two non -metal atoms.What is electronegativity?Electronegativity is the tendency of an atom or a functional group to attract electrons toward itself.How electronegativity is related to covalent bonding?Electronegativity affects the degree of sharing of electrons in covalent bonding.The higher the equivalent sharing the stronger the bond.Learn more about covalent bonding here...
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What are the units for measuring specific heat?
degrees Celsius per gram
joules per degrees Celsius
joules per gram degree Celsius
degrees Celsius per joule gram
Answer:
The SI unit of specific heat is joule per kelvin and kilogram, J/(K kg). For example, at a temperature of 25 °C (the specific heat capacity can vary with the temperature), the heat required to raise the temperature of 1 kg of water by 1 K (equivalent to 1 °C) is 4179
Explanation:
if this answer is correct make me as brainlelist
Answer:
C
Explanation:
bc
What is used up in and stops a chemical reaction?
Answer:
The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. Given the balanced chemical equation that describes the reaction, there are several ways to identify the limiting reagent.
What happens when the south end of Earth’s axis is tilted toward the Sun?
The Northern Hemisphere experiences fall.
The Northern Hemisphere experiences spring.
The Southern Hemisphere experiences winter.
The Southern Hemisphere experiences summer.
I WILL MARK YOU AS BRAINLIEST IF YOU ARE THE FIRST ONE TO ANSWER THIS QUESTION
Answer:
.
Explanation:
The south end of the Earth's axis is tilted toward the sun, summer in the Southern Hemisphere and winter in the Northern Hemisphere. "Equal night", twice a year, when the noon sun is directly overhead the equator, day and night are almost exactly 12 hours each everywhere on earth! September 22 is autumn equinox.
Answer:
the northern hemisphere experiences fall
help
When the sun impacts weather, an interaction with the __________ takes place.
atmosphere
biosphere
geosphere
hydrosphere