Answer:
Synthesis Reaction
Explanation:
Na is sodium and CI2 is chlorine . This makes Sodium chloride.
These two reactants combine to make a more complex product.
Answer: Synthesis Reaction
Mario studied how far room temperature water would spurt out of a platic milk carton when 3mm holes were punched at different heights from the bottom of the container. Identify the independent variable.
A. 3 mm holes
B. distance water traveled out of carton
C. different heights of holes in container
D. ice water from Iceland
Answer:
C. Different heights of holes in the container
Explanation:
The independent variable is the variable that changes. So the independent variable is C because the heights of the holes change.
Use the chemical reaction to answer the question. CaCO3→CO2+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown.
What is the total mass of the products?
A. 10 grams
B. 15 grams
C. 30 grams
D. 60 grams
Use the chemical reaction to answer the question. Fe+O2→Fe2O3 What happens to atoms of Fe and O2 during the reaction?
A. They are lost.
B. They maintain their properties.
C. They are rearranged.
D. They gain mass.
What is most likely to occur during a chemical reaction?
A. Molecules of the original substance are lost.
B. Mass is conserved.
C. The original substance maintains its properties.
D. New atoms are created.
Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown.
Which statement about the reaction is correct?
A. There are more H atoms after the reaction.
B. The atoms of the reactants are regrouped during the reaction.
C. Atoms of Na are destroyed during the reaction.
D. Some atoms gain mass after the reaction.
Use the chemical reaction to answer the question. 2H2+O2→2H2O There are four atoms of hydrogen (H) before the reaction.
How many atoms of hydrogen are present after the reaction?
A. 5
B. 4
C. 2
D. 8
PLEASSSSSSSE ANSSSSWER ALL THE QUESTIONS------------
The total mass of products obtained in the reaction; CaCO3→CO2+CaO is 30 grams. Given the reaction; Fe+O2→Fe2O3, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction. Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.
According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.
This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.
The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.
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How do you look for elements with similar properties on the periodic table?
Use the word continuous, to summarize the types of data scientists work with.
Answer:
Scientists use continuous data to make observations.
please help 8th grade science i need #2 please!
Which is a feature of a cladogram?
A-The characteristics must be shared among the organisms.
B-The characteristics must be different among the organisms.
C-It must contain at least three different shared characteristics.
D-It must contain at least three different groups of organisms.
tell me the answer and tell me how you did it!
Answer:
water vapor cools and forms air in the clouds.
Explanation:
because when the water vapor cools in the biosphere clouds are formed in the atmosphere.
what is the symbol for halogen on the periodic table? can u please help me????
Answer:
the halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Explanation:
this is the last one thank you to anyone who helps
Chromium-58 Carbon-16 Nitrogen-15 Sulfer-25 Sodium-20 Selenium-80
protons:24 6 7 16 11 34
neutrons:34 10 8 7 1 46
electrons:24 6 7 16 11 34
Explanation:
Are the forces on an object in motion balanced? Why or why not?
Answer:
An object's motion can be changed by unbalanced forces. Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.
Even though the process of calling someone requires that a signal go across many miles, a call happens very quickly. How can that be?
A telephone signal uses radio waves which travel at the speed of light.
Traditional communication between people was a Herculean task before the advent of technology. It was quite difficult to pass messages from one point to another.
However, when you call a person on phone, the signal travels across miles speedily because telephone communication makes use of radio waves which are electromagnetic waves and travel at the speed of light.
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What does scientific method mean in science.
Explanation:
the scientific method is a series of steps or procedures that scientists or anyone who has a question follows to answer any question that they may have. (it's in my own words)
what is nitrogen metal nonmetal metalloid PLEASE HELP ME!!!!!!!!!!
Answer:
nonmetal
Explanation:
In this experiment, you will use a natural indicator to indirectly determine the H+ concentration of some common household solutions to determine a physical characteristic of the solution. In the space below, write a scientific question that you will answer by doing this experiment.
Some of the scientific questions that may be answered through the experiment are:
(1) What are the physical changes that may occur in the solution or the indicator when added with acidic/basic solution?
(2) How much of the indicator is needed in order to bring about a significant physical change in the solution to identify its H+ concentration?
if wrong i sry :(
By determining the H+ ion concentration of a solution, we can measure the pH of the solution and thereby to check its acidity. Thus, by doing this experiment, we are answering the question that the what is the pH of the household solutions, and they are acidic or basic?
What is pH?pH of a solution is the measure of its H+ ion concentration. Mathematically it is the negative logarithm of the H+ ion concentration. The pH of a solution tells it is acidic or basic.
pH of 7 is neutral solution and a pH below 7 is acidic whereas a pH above 7 is basic solution. We can use natural indicators such as cabbage juice to determine the pH of house hold solutions such as lemon juice, milk, soap solution etc.
A color change of red is given by acidic solutions ad that of blue indicating the basicity. Hence, the scientific question will be to determine pH range of the solutions.
To find more on pH, refer here:
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How is heat transferred in a pot of boiling water?
There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, in a pot of boiling water, heat is being transferred by convection method.
What is energy transfer in thermodynamics?Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. In a pot of boiling water, heat is being transferred by convection.
Therefore, in a pot of boiling water, heat is being transferred by convection method.
Learn more about energy transfer, here:
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GIVING BRAINLIEST what does red and blue make
Answer: Purple
Explanation:
Mixing the color blue and red make the color purple ( fact: purple is the least used color in country flags )
Which is a more reactive chemical, Ca or Ga?
The word trough has more than one meaning. Write two sentences that use the word, one showing its everyday meaning and one showing its scientific meaning.
Answer:
Explanation:
I'm not sure what you mean by science, but I'll assume it's physics.
A trough, non scientifically is a narrow open container for animals to eat or drink out of.
Eg: The pigs drank water out of their small metal trough.
If you mean physics then the Trough is the lowest point on a wave.
Eg: The distance between two troughs on a wave was 14cm which is its wavelength.
Hope this helps :)
Which statement is a hypothesis?
A. If an earthworm is given a choice, it will move toward darkness rather than light.
B. Most of the earthworms moved to the shaded area during the experiment.
C. The earthworms must all be the same species.
D. Do earthworms prefer bright light or darkness?
Tiffany was investing how fast it took Hayden to react to different sounds. Identify the dependent variable.
A. different sounds
B. how fast Hayden reacted
C. playing the trumpet over and over
D. Hayden
Answer:
B
Explanation:
I think
Identify two characteristics shared among transverse waves, longitudinal waves, and surface waves.
Answer: For transverse waves, the waves move in perpendicular direction to the source of vibration.
For longitudinal waves, the waves move in parallel direction to the source of vibration .
They are similar within the sense that energy is transferred within the kind of waves.
Explanation:
The shared characteristics between traverse, longitudinal and surface waves include :
Traverse, longitudinal and surface waves are all mechanical waves They only transport energy without transporting matter.Mechanical waves are simply waves which requires a material medium to propagate. They include longitudinal, surface and traverse waves.
Also, all three waves transfer energy through a medium without the transfer of materials or matter in the medium.
Therefore, all three waves are mechanical waves and do not transfer matter.
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i need help on this question ASAP
Answer: well because
they have a different mass but the triangles have all the same acceleration the house is going to have more force added to it.
Explanation:
Tiffany was investing how fast it took Hayden to react to different sounds. Identify the independent variable.
A. how fast Hayden reacted
B. different sounds
C. playing the trumpet over and over
D. how much time it took Hayden to react
E. Hayden
Answer:
B. Different sounds
Explanation:
The independent variable is the variable that changes. So B is the independent variable because the sounds are what change.
Different sounds are the independent variable. Hence, option B is correct.
What is the independent variable?It is a variable that stands alone and isn't changed by the other variables you are trying to measure.
The independent variable is the variable that changes.
So B is the independent variable because the sounds are what change.
Learn more about independent variables here:
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Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find out if there is something better. What is his dependent variable?
A. amount of tissue
B. Kleenex
C. mass of the snots the tissue can hold
D. type of tissue
E. Justin
Answer: c
Explanation:
Dependent Variable is what you measure, he's measuring the amount of snot that can be held
Choose all the answers that apply. What are examples of how science has influenced technology?
A. discovery of x-rays allowed for creation of x-ray machines to help advance internal medicine
B. nuclear power plants were created after discovering that massive amounts of energy
C. could be released by splitting the nucleus of an atom
D. satellites helping scientists map the earth
E. robotic machines assisting doctors in surgery
F. scientific study of electron flow resulted in the concept of electricity
Answer:
A and B
Explanation:
A: The discovery of x- rays is a scientific discovery that led to X-ray machines which is technology.
B: Finding out that massive amounts of energy can be released by splitting the nucleus of an atom was the discovery and it led to nuclear power plants.
Satellites helping scientists map the earth doesn't really have an example of science. It just says that Satellites help scientists, and satellites are technology.
Robotic machines are also technology. Robots assisting doctors in surgery is technology helping people not science influencing technology.
So A and B would be the answers.
Hope this helps :)
Answer:
b,c,e,f
Explanation:
hey can someone help me with this please I have two other ones I need help with also
Answer:yea
Explanation:
1)156
2)341
3)262
4)3242
5) my friend
scientific law
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Part 2-Short Answer- All questions must be answered in 3 complete sentences
What are the characteristics of scientific thinking and investigating?
1.?
2.?
3.?
Why is science literacy important?
1.?
2.?
3.?
What skills and tools do scientists use?
1.?
2.?
3.?
Why is the use of the inquiry process (or scientific method) a practical way to approach science?
1.?
2.?
3.?
Why are scientific theories modified, but seldom discarded?
1.?
2.?
3.?
How has science and technology influenced everyday life?
1.?
2.?
3.?
A teacher is teaching a lesson on energy transformations. Which explanation is the best at comparing the amount of energy contained in a granola bar you eat for breakfast and the amount of mechanical energy used to walk to school. A. the amount of chemical energy in the granola bar is equal to the mechanical energy B. the amount of chemical energy in the granola bar is less than the mechanical energy C. the amount of chemical energy in the granola bar is greater than the mechanical energy D. the energy amounts cannot be compared
Answer:
D
Explanation:
Which of the following statements is true?
Dalton believed atoms were made mostly of empty space.
The number of protons in an element is always equal to the number of neutrons.
Plasmas have a net negative charge.
Solids have a fixed mass, volume, and shape.
1. What happens to the amount of energy as you move up the energy pyramid.
2. Describe how the other organisms would be affected if the secondary consumer in a food chain were removed.
5. Label the following as asexual or sexual reproduction
__________ Identical to parent __________ Most animals produce this way
Answer:
Look it up
Explanation:
If you don't know then look it up
