help it is due tomorrow
Answer:
2 H atoms
1 Mg
5 total atoms
Explanation:
Which statements are true?
All landforms have the same combinations of elevation and relief.
Different landforms have different combinations of elevation and relief.
Elevation is the height of a feature above sea level.
Relief is the height of a feature below sea level.
Relief is the difference between the highest and lowest points in an area.
Buying fruit and vegetables needs to be done more often as these types of foods can quickly go rotten. What could you do to slow down the chemical change of fruits and vegetables rotting? Give a reason to support your answer.
The process used to slow down the chemical change of fruits and vegetables is refrigeration.
What is refrigeration?Refrigeration is defined as the process of removing heat from an enclosed space and surface for the purpose of lowering the temperature.
It can also be defined as removal of unwanted heat from the selected object, substances or space and its transferred to another object or substance.
Keeping the fruits and vegetables in refrigerator will help to slow the growth of bacteria and slow down the rotting of fruits and vegetables.
Thus, the process used to slow down the chemical change of fruits and vegetables is refrigeration.
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1) you are building a model plane that needs small block inside to balance its weight. you find that the block material you are using has half the density you thought it did. you still need the same weight for the blocks in the plane, and they must have the same width and length. how you can keep the weight the same?
2) your teachers set two cups on a bench at the front of the class. one contains water dyed blue and the other clear water. the teacher says one cup is very salty water and the other one is freshwater. how would you figure out which one is salty and which one is fresh.
3) In much of the world, SI units are used everyday life and not just in science. why would it make sense for people in the united states to use SI in everyday life, too? explain using math terms such as calculate and convert.
HELP ME PLEASEE
Answer:
then it will move 1 too 2
right maybe
Explanation:
Which of the following is the best way to explain how baking a cake or frying an egg is a chemical change?
A Both are changing size and shape.
B Heat is changing the texture of both substances.
C Heat is being added to both, causing a phase change.
D The end products of both cannot be reversed to their original forms.
Answer:
I think C if not then B
Explanation:
Heat will change the product and will become a chemical change.
Answer:
D
Explanation:
because you literately cant change it back
to its original form also chemical change means something is permanently
changed so when you bake a cake or fry an egg there is no way possible to change it back
Which is the highest peak of North America?
Answer:
denali im pretty sure
Explanation:
The highest peak of North America is Denali in Alaska, but you don't have any answers? I hope that helped!
Correctly sequence the following from smallest to largest in mass: protons, atom, electrons.
Answer:
Electrons, protons, and then atoms
Explanation:
Yea...
A student pot acabe of better on a metal rod. Then be placed the other end of the red in a beaker of hot water. The setup for the investigation is shown below
The butter melted in ten minutes. What type of energy did the metal rod conduct to the butter?
electrical
chemical
thermal
mechanical
ok please help
which goes where and why??
Answer:
well the first one is radiation the second one is conduction and the third one is convection. hope this helps! :)
Explanation:
I am an element that has no luster, brittle, and is a poor conductor of electricity. What element can I be?
Answer: Oxygen
Explanation:
Oxygen is not a good conductor, it is brittle, and has no luster.
can u help me and ty :))
Answer:
3.166
Explanation:
energy=30J
input =95J
efficiency=?
efficiency= input/energy
= 95/30
=3.166
Answer:
3.166
Explanation:
= 95/30
=3.166
Hope this helped!!
what coeiffecents need to be added to balance to balance the chemicial equation Na+02 arrow NaO2
Answer:
#4 - 4, 1, 2
Explanation:
4Na + 1O2 => 2Na2O
Jamie completes the following steps in an experiment to investigate how temperature affects how fast something will rust in water. He places a nail in a bowl of water in the sun and a nail in a bowl of water in the shade. He also leaves an iron nail out of the water in a dry bag out of the sun. Why would Jamie leave one out of the water and out of the sun?
A Jamie also wants to test if the water affects how fast the iron nail will rust.
B Jamie notices that the size of the nail is different, so he does not want to use it later.
C Jamie doing all these steps to create a control group to compare his results to.
D Jamie puts the nail in a cooler place to see if it will rust as fast as the other items.
Answer:
C
Explanation:
1. List regions experiencing high pressure.
2. Based on the weather shown in Florida, is Florida experiencing high or low
pressure? How would you indicate this on the map above?
3. What kind of front is the South experiencing?
4. Based on this information, what kind of weather do you think the southern part of
the United States is experiencing?
#5. What does this mean about the current weather conditions in Florida?
#6. What does this mean about the current weather conditions in the state of Washington?
Answer:
its the big c
Explanation:
One of the major ways humans depend on marine plants is for which of the following?
A.) Production of oxygen
B.) Regulation of ocean temperature
C.) Increasing atmospheric carbon dioxide
D.) Maintaining the concentration of salt
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option A.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Oxygen is the only thing for which humans depend on marine plants. Oxygen is very important for humans.
Therefore, the correct option is option A.
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In this experiment, you will measure mass and volume of various sport balls, both regularly shaped ball and irregularly shaped. What property of an object can you determine using mass and volume? In the space below, write a scientific question that you will answer by doing this experiment.
Answer:
by using a balnance l×w×h
Answer:
by using a balance l×w×h
Explanation:
Hey can you help thanks
What was surprising or interesting to learn about the very small organisms and objects in today’s lesson? *
What other questions do you have about microorganisms? *
Answer:
Explanation:
Cells in the body
Cell is surprising or interesting to learn about the very small organisms and objects in today’s lesson.
What is cell?Cell is defined as the basic unit of life or it has been structural or functional unit of life. Cell contain many cell organelles and all the cell organelles have various functions such as nucleus is the brain of the cell and it controls all the function of the cell.
Cell is of two types eukaryotic and prokaryotic cell and the cell which are advanced and developed is known as eukaryotic and the cell which are not much developed and does not contain cell organelles is known as prokaryotic cell. Cell contain many cell organelles and all the cell organelles have various functions such as nucleus is the brain of the cell and it controls all the function of the cell.
Multicellular organism is made up of eukaryotic cell and unicellular is made up of prokaryotic cell. Cell is always developed from pre existing cell and it has been the structural and functional unit of life. Cell is the building block of an individual.
Therefore, Cell is surprising or interesting to learn about the very small organisms and objects in today’s lesson.
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Eriq, a chemist, is running tests with four unknown elements. He has found that they all bond the same way, so he knows that they are in the same group on the periodic table of elements. The table shows other properties that Eriq observed.
A 4-column table with 4 rows titled properties of four unknown elements. The first column titled element number has entries 1, 2, 3, 4. The second column titled melting point has entries 266 K, 172 K, 387 K, 53 K. The third column titled boiling point has entries 332 K, 239 K, 457 K, 85 K. The fourth column titled phase at room temperature has entries liquid, gas, solid, gas.
These four elements are most likely in group
15.
16.
17.
18.
Answer:17
Explanation:
i agree
2H2+O2→2H2O
There are four atoms of hydrogen (H) before the reaction. How many atoms of hydrogen are present after the reaction?
4
8
5
2
Answer:
2
Explanation:
The number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4
Law of conservation of massFrom the question,
We are to determine the number of atoms of hydrogen present after the reaction.
From the law of conservation of mass which states that
"Matter can neither be created nor destroyed"
This means, the number of atoms are the same before and after the chemical reaction.
Since the number of hydrogen atoms before the reaction is four, then there would be four hydrogen atoms after the reaction.
Hence, the number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4
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Which element would react faster with oxygen because of the properties it possesses?
Berryllium, Potassium, Neon, Barium
Answer:
Berryllium
Explanation:
its the most reactive (mark brainliest plz)
Berryllium would react faster with oxygen.
information regarding oxygen:
Beryllium refer to the silvery-white metal. It is in soft and contains the less density. Beryllium applied in alloys along with copper or nickel.Also, it should be reached quicker with the oxygen.Find out more information about the oxygen here:
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The combination
nation of two or more atoms from same or different elements creates a(n)
Which lists only metalloids?
arsenic (As), sulfur (S), and polonium
(Po) antimony (Sb), tellurium (Te), and gallium(Ga)
boron (B), germanium (Ge), and tellurium (Te)
polonium (Po), aluminum (Al), and silicon (Si)
Answer:
boron (B) germanium (Ge) and Tellurium (Te)
Explanation:
got it right on edge : )
I need an answer to how science shape philosophy!
Answer:
Philosophy may be called the "science of sciences" probably in the sense that it is, in effect, the self-awareness of the sciences and the source from which all the sciences draw their world-view and methodological principles, which in the course of centuries have been honed down into concise forms.
Explanation:
Which reaction is more likely to involve a form of combustion (exothermic)? Explain your reasoning.
Answer:
The general equation for an exothermic reaction is: Reactants → Products + Energy.
Gold atoms can be identified based on the number of which subatomic particles?
A.neutrons
B.electrons
C.nuclei
D.protons
Answer: A
Explanation:
A Gold (Au) atom has 79 protons and 79 electrons. A typical gold atom has 118 neutrons, though there are 18 other radioisotopes discovered so far. 79 is its charge (atomic number), which is both its proton number and electron number
After studying chemical reactions in school, Jen examined some of the different ways people use synthetic materials. She found that there are a variety of ways people use them. What are some of the ways people use these materials and why?
Please help out
Which part of an atom is involved in chemical reactions?
A.nucleus and its particles
B.negatively-charged particles
C.neutrally-charged particles
D.positively-charged particles
Answer: Valence electrons are involved in a chemical reaction.
Explanation:
A chemical reaction takes place when there is an involvement of valence electrons. Bond formation involves either sharing of valence electrons or transfer of valence electrons. Bond breaking involves the separation of valence electrons.
When valence electrons are shared between the atoms, it leads to the formation of covalent bond.
When transfer of electrons takes place from one atom to another atom, it leads to the formation of ionic bond.
Hence, valence electrons are involved in a chemical reaction.
I think is A
The part of an atom is involved in chemical reactions is the nucleus and its particles. Therefore, option A is correct.
What is chemical reaction ?In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.
Breaking chemical bonds between reactant molecules (particles) and creating new bonds between atoms in product particles are two aspects of chemical reactions (molecules). While there are the same number of atoms both before and after the chemical transition, there will be a change in the number of molecules.
The electron cloud is the area of the atom that participates in chemical reactions. The region of the atom that surrounds the nucleus is known as the electron cloud. The electron cloud contains electrons, which are the particle in charge of causing the reaction to take place.
Thus, option A is correct.
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An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?
A.50 protons, 69 electrons, 50 neutrons
B.50 protons, 50 electrons, 69 neutrons
C.69 protons, 50 electrons, 69 neutrons
D.69 protons, 69 electrons, 50 neutrons
Suppose that 273 g of the substances listed displaces 26 mL of water. What is the substance?
Substances:
Zinc=7.13
Silver=10.50
Lead=11.35
Answer: Pretty sure its silver
Explanation:
A scientist is studying a compound that includes nitrogen, carbon, oxygen, and hydrogen. Is the scientist studying an organic molecule? Why or why not?
Answer: It is an organic molecule
Explanation:
In order for a molecule to be organic, it has to contain both carbon and hydrogen. The compound that the scientist is studying contains both.