Answer:
true
Explanation:
took test
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
The boiling point of water is 1000C.
(a) Once boiling starts, why does the temperature not rise accordingly even heat is supplied? (b) Steam causes more severe burns than boiled water at the same temperature. Why?.
Answer:
a) The heat which we supply to water during boiling is used to overcome these forces of attraction between the particles so that they become totally free and change into a gas. This latent heat does not increase the kinetic energy of water particles and hence no rise in temperature takes place during the boiling of water.
b) Steam produces more severe burns than boiling water even though both are at 100oC because steam contains more heat, in the form of latent heat, than boiling water.
Explanation:
i hope this will help u
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.
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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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
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
Which one is correct?
Answer:
The answer is a
Explanation:
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.
please mark brainliest
Which of the following has the smaller electronegativity?
A. Lithium
B. Beryllium
C. Sodium
Answer:
i think it c
Explanation:
Why might a metallic compound be mistaken for an ionic compound, based on its physical properties?
A. Both metallic and ionic compounds form brittle crystal lattice structures. Thus, they are unable to absorb energy and cannot form new shapes.
B. Both metallic and ionic compounds are composed of metal atoms in a bond. However, only ionic compounds show extreme luster.
C. Both metallic and ionic compounds form ductile compounds. Thus, they are able to be reshaped without breaking the bond of the compound.
D. Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.
Answer:
(D). Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.
Explanation:
Metallic compound have the ability to conduct electricity. Since they are Metals they have loosely held electrons which can contribute to electricity conduction.
Ionic compound are brittle physically, ionic compound cannot conduct electricity while being in solid state as the ions are held strongly by electrostatic force of attraction, they can only conduct electricity while they are in molten or aqueous state. In molten state they are forming ions, and ions are free to move within the solution and therefore contribute to electricity conduction.
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 of the following are found in the nucleus of an atom? A=neutrons an elements B=neutrons and protons C=electrons and protons D=protons and electrons
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.
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:
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.
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 of the following are properties of ionic compounds (choose all that apply) Form crystals Form crystals Dissolve in water Dissolve in water High melting point and boiling point High melting point and boiling point Poor conductors of electricity Poor conductors of electricity Hard Hard Soft Soft
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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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
Lucien drove for 24 straight hours going 960 KM. What was his average speed?
Answer:
40 KM an hour.
Explanation:
Answer:
40 KM an hour.
Explanation:
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].
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
If block 1 were broken in two equal pieces, what would be the density of each piece? Why?
Explanation:
The density of the new blocks will be the density of the original block.
For example if the density of the block is 2g/cm³, when the block is broken down into two, each of the new block will have a density of 2g/cm³.
Density is an intensive property of matter. It does not depend on the mass of the substance available. Every sample of a substance have the same value of density.The primary energy source in the United States is:
solar energy
nuclear power
fossil fuel
hydroelectric power
will give brainliest
Answer:
Fossil fuels i believe
Explanation:
Answer:
fossil fuel
Explanation:
got it right on ow
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:
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:
help
When the sun impacts weather, an interaction with the __________ takes place.
atmosphere
biosphere
geosphere
hydrosphere
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 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:
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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