Answer:
halving, the mass of planet X and halving the distance between the planets
The gravitational force of attraction is the fundamental force of the universe. Doubling the mass of planet X and halving the distance between the planets increases the gravitational attraction. The correct option is C.
What is gravitational attraction?The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them. The formula of gravitational force is given as:
F = G m₁m₂ / r²
From the equation it is clear that the gravitational force increases with the increase in the mass and decreases with the increase in the distance between the objects. This law is true for each particle of matter, each particle of matter attracts every other particles.
Here doubling the mass of planet X and halving the distance between the planets increases the gravitational attractive force.
Thus the correct option is C.
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Which of the following are physical properties?
Radioactivity
Color
Temperature
Flammability
Texture
Reactivity
Answer:
Explanation:
The properties that are observed or measured without changing the composition of matter are called physical properties.
color, Temperature, Texture are the physical properties as the composition of matter remains the same.
On the other hand, Radioactivity, Flammability and Reactivity comes under chemical property as during the chemical reactions there might be some changes in the properties.
The drawing below was sketched by a student who was observing cells under a microscope. The cell is classified as
A prokaryotic
B eukaryotic
C periodic
D Nucleotic
Answer:
prokaryotic
Explanation:
I got it right
there are 4 wavelengths that are emitted from a hydrogen atom that can be seen by the human eye. Two of the wavelengths are the same color. what color are they?
a) red, blue, and violet
b) orange, yellow, and green
C) red, orange, and yellow
D) blue, indigo, and violet
Answer:
The correct answer is - a) red, blue and violet.
Explanation:
In the visible spectrum, the hydrogen atom emits four different wavelengths that are visible to the human eye. The four wavelengths are these lines are 656 nm, 486 nm, 434 and 410 nm. Shorter wavelengths are not visible to human eyes fall in ultravoilet lights at less than 400 nm.
The H-α line is the red color wavelength at 656 nm, the blue color has two different wavelengths that are 486 nm sometimes called cyan, and 434 nm, and violet at 410 nm.
7. List all of the variables that you controlled or kept the same.
Salt water
Answer:
Temperature is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment.
Explanation:
how many moles are in 52 grams of o2
Answer:
1.625 moles
Explanation:
mole=mass/molar mass
mole= 52/25
PLEASE HURRY. compare the reactivitys of potassium and gold metals toward water, what happens when SO2 reacts with water?? write chemical
Answer:
See Explanation
Explanation:
The reactivity of a metal towards water depends on the position of the metal in the electrochemical series. Metals that are high up in the series do react violently and spontaneously with water. Metals that are lower in the series are sometimes unreactive in water.
Hence, potassium reacts very rapidly with water to yield KOH and hydrogen gas while gold does not react with water.
SO2 react with water to form sulphuric acid hence SO2 is called an acid anhydride.
The reaction occurs in the following steps;
2SO2(g) + O2(g) ------->2SO3(g)
SO3(g) + H20(l) ------>H2SO4(aq)
Explain the volume of ideal gasses as related to the molar concept.
Answer:
n = Initial volume/22.4L
Explanation:
The molar concept is simply one that is used to find the Number of moles and explain the relationship it has with avogadro's number, molecular mass, molar mass e.t.c.
Now, in terms of molar mass, number of moles is given by the formula;
n = mass of the sample/molar mass
In terms of avogadro's number, number of moles is;
1 mole = avogadro's number = 6.02 × 10^(23)
Now, when dealing with ideal gases, the molar volume of an ideal gas is 22.4 L.
Now the relationship between this volume and the mole concept is that the number of moles is gotten by dividing the initial volume by this molar volume.
Thus;
n = Initial volume/22.4L
A new chemistry teacher arrives in her new room and discovers that the room was left in total chaos by her predecessor. While organizing the room, she finds a box on a shelf in the prep room labeled "Electrochemistry demonstration". The box contains some metal strips, and a solution in a bottle. The metal is labeled "Metal E" and the solution is labeled "1 M nitrate salt of E". In an attempt to organize the activity, she looks throughout the room for similar samples. She manages to find samples of metals and their nitrate solutions labeled A, B, C and D in addition to the original sample. In a file cabinet, she finds a paper labeled "Electrochemistry Activity" which lists five metals: zinc, aluminum, magnesium, silver and tin She is not able to find anything that identifies which metals correspond to which letters. She makes some quick observations, summarized below.
Answer:
D in addition to the original sample. In a file cabinet, she finds a paper labeled "Electrochemistry Activity" which lists five metals: zinc, aluminum, magnesium, silver and tin She is not able to find anything that identifies which metals correspond to which letters. She makes some quick observations, summarized below.
Explanation:
how do I calculate the density
solid iron with copper (II) sulfate. Assume the iron will form a +2 charge on the product side. Write the balanced equation for this reaction
Answer:
hey here is the answer to your question.
Explanation:
1) Write a balanced equation for the reaction occurring. (*Iron occurs in a few different oxidation states, but I will assume we're referring to Fe(II) or Fe2+)
Fe + CuSO4 -> Cu + FeSO4
2) Calculate the number of moles of each reactant.
Fe: 1.924 g * (1 mol / 55.85 g) = 0.03455 mol Fe
CuSO4: 0.1363 L * (0.0750 mol / 1 L) = 0.01022 mol CuSO4
3) Determine the limiting reactant. Because we have fewer moles of copper(II) sulfate and are reacting both reactants in a 1:1 ratio, we will run out of copper(II) sulfate first, making it the limiting reactant.
4) Convert moles of the limiting reactant to moles and grams of product of interest.
0.01022 CuSO4 (1 mol Cu / 1 mol CuSO4 ) (63.55 g Cu / 1 mol Cu) = 0.6495 g Cu
Four balls have the same temperature. Which ball has the most Thermal Energy? A.Golf ball(45g) B.Basket ball(625g) C.Bowling ball(5000g) D.Tennis ball(60g)
Answer:
b
Explanation:
b. ,u play with the ball, handle the ball grab the ball throw the ball exc.
GIVE ME BRAINLIEST!!!!
nah im jk lol
ANYWAY HAVE A GREAT DAY!
Answer:
okie then you too
Which functional group is shown below?
cd
R
O-R
A. Amino
B. Hydroxy!
C. Ether
D. Ester
Ester functional group is the given image. Therefore, the correct option is option D among all the given options.
What is functional group?A functional group in organic chemistry is a substituent and moiety inside a molecule that triggers the molecule's distinctive chemical processes. No matter how the rest of a molecule is made up, the very same functional group would experience the same or a similar set of chemical events.
This permits the planning of chemical synthesis as well as the methodical prediction of chemical changes and the behavior of chemical molecules. Other functional groups close by can affect a functional group's reactivity. Retrosynthetic analysis can be used to design organic synthesis by using functional group interconversion. Ester functional group is the given image.
Therefore, the correct option is option D.
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Answer: D. Ester
Explanation:
So3+H2o→H2 So4
use the oxidation numbers to identify the nature of this reaction redox or not
This is not an redox reaction because the oxidation number of Oxygen atom is not changing.
The reaction between solid aluminum and liquid bromine is exothermic. This reaction creates
the product aluminum bromide.
What equation includes the correct formulas and demonstrates conservation of mass?
A Al(s) + Br2(1) - AlBr3(s)
B Al(s) + Br(l) - AlBr(s)
C Al(s) + 3Br(1) - AlBr3(s)
D
2Al(s) + 3Br2(1) - 2AlBr3(s)
Answer:
correct answer is d)
Explanation:
This answer demonstrates law of conservation of mass because the mass of the products is equal to the mass of reactants with the help of the coefficients which is the process known as balancing. This answer also includes the correct formulas, as Br is a gas so it MUST be written as Br2. hope this helps:)
2Al(s) + 3Br2(1) - 2AlBr3(s) is the correct formulas and demonstrates conservation of mass.
What is Conservation of Mass?Every action has an equal and opposite response, states Newton's Third Law. This indicates that any force applied to an item will have an equal and opposite-directed response force of the same magnitude. A force pair is the collective name for these connected forces.
Each individual object will have a different force pair with each other object in systems of numerous objects where all things interact. In the case of charged particles, the charge of each object will dictate the direction of each force in the force pair.
Similar charges will cause particles to repel one another by directing their forces away from one another. With their forces pointing in the same direction, particles with opposing charges attract one another.
Therefore, 2Al(s) + 3Br2(1) - 2AlBr3(s) is the correct formulas and demonstrates conservation of mass.
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Which is a process that involves collecting information and ideas that are supported by belief or opinion?
science
systematics
pseudoscience
hypothesis
Answer:
The answer is C
Explanation:
I did it on edge
Silicon is a metalloid element commonly found in Earth's crust. It helps form many different compounds, which have a variety of different properties and applications.
One type of silicon-containing minerals is asbestos. Asbestos is resistant to heat and electricity, leading to its widespread use in manufacturing and the construction industry. Asbestos insulates buildings and makes them fire resistant. However, despite its usefulness, exposure to asbestos fibers or dust carries serious health risks that can cause respiratory disease or cancer.
Another silicon-containing compound is orthosilicic acid. Unlike asbestos, orthosilicic acid seems to benefit human health. This compound readily dissolves in water and is biologically stable enough to be used in the human body. Scientists have found evidence that orthosilicic acid plays an active role in the maintenance of strong bones.
The information above shows that silicon has both beneficial and detrimental effects on the human body. Given this information, think about other examples of materials or substances that can be both beneficial and detrimental at the same time. Research and write about two examples. Be sure to provide evidence to support your point of view.
Answer:
1. Zinc
Zinc also plays a vital role in our body because it is the main component of all cells and also provides protection against microbes. It is also needed for the production of DNA and protein. Zinc is good to take when you are feeling sick with a cold or even a sore throat. But Zinc in excess amount can cause copper deficiency, upset stomach aches, and diarrhea
2.Iron
Iron is a major component of hemoglobin which is responsible for the transportation of oxygen from the lungs to all cells of the body. Women take to iron a lot to give them energy after childbirth because they become iron deficient. Iron in excess can have a negative effect on our body such as it causes liver disease (cirrhosis, cancer), heart attack, diabetes and sometimes it causes death.
Explanation:
A group of 6th-grade students constructs arguments on why water conservation is important. Which student argument is correct?
A.
Student 1 argues that people need water for recreation and transportation only.
B.
Student 2 argues that as the population increases in the world, so does the need for water.
C.
Student 4 argues that we use less water for agriculture and more on personal needs.
D.
Student 3 argues that there is an unlimited supply of water for animals, ecosystems, and people to use daily.
From a chemicals standpoint, Student 2 contends that as global population grows, so does the need for water. This is the correct reasoning.
What is the purpose of chemistry?
Our basic needs of food, clothes, shelter, health, energy, and pure air, water, and soil are all met by chemistry. Chemical technologies improve our quality of life in many ways by offering fresh approaches to issues with health, resources, and energy use.
What subjects are studied in chemistry?
The study of matter, including its properties, behaviours, and structures, is known as chemistry. Chemists induce and monitor these reactions both in nature and artificially in a lab setting because they are interested in how materials behave and react in specific settings.
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What is one thing people can do to protect biodiversity?
Calculate the volume (liters) of solution that can be prepared from 180. grams of K2Cr2O7 for a 0.200M solution.
Answer:
The volume of the solution is 0.305 liters.
Explanation:
Molar mass is the amount of mass that a substance contains in one mole. The molar mass of K₂Cr₂O₇ is 294 g / mole. Then you can apply the following rule of three: if by definition of molar mass 294 grams of the compound are contained in 1 mole, 180 grams are contained in how many moles?
[tex]moles=\frac{180 grams*1mole}{294 grams}[/tex]
moles= 0.61
Molarity is a measure of the concentration of a substance that is defined as the number of moles contained in a certain volume. So, the molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
[tex]molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
molarity= 2 Mnumber of moles of solute= 0.61 molesvolume= ?Replacing in the definition of molarity:
[tex]2 M=\frac{0.61 moles}{volume}[/tex]
Solving:
[tex]volume=\frac{0.61 moles}{2 M}[/tex]
volume= 0.305 liters
The volume of the solution is 0.305 liters.
What is the mass in grams of 1.204 x 1024 molecules of
hydrogen gas (Hz)?
a 14.2 g
b 6.77 g
C 4.03 g
3.45 g
Copper metal is placed in a solution of silver nitrate. Write out the net ionic of the net equation for the reaction that occurs.
Answer:
[tex]Cu(s)+2Ag^+(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)[/tex]
Explanation:
Hello there!
In this case, according to the given description of the reaction whereby copper metal reaction a solution of silver nitrate; it turns out possible for us to write out the resulting net ionic equation by firstly write the complete molecular equation:
[tex]Cu(s)+2AgNO_3(aq)\rightarrow Cu(NO_3)_2(aq)+2Ag(s)[/tex]
Now, we write the complete ionic equation, by taking into account that just the aqueous species are ionized:
[tex]Cu(s)+2Ag^+(aq)+2(NO_3)^-(aq)\rightarrow Cu^{2+}(aq)+2(NO_3)(aq)+2Ag(s)[/tex]
And finally, we cancel out the nitrate ions as the spectator ones in order to obtain:
[tex]Cu(s)+2Ag^+(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)[/tex]
Regards!
Which of the following wouldn't be a good tool to use when measuring pH values of solutions?
Question 8 options:
a)
litmus paper
b)
digital pH meter
c)
electrical conductivity meter
d)
pH paper
litmus paper
Because it will just tell if the solution is acidic or basic, it won't tell the pH
If you want to make 8.00 moles of AlF₃ how many moles of F₂ will you need, using the following balanced chemical equation? 2 Al + 3 F₂ → 2 AlF₃
Answer:
You will need 12.0 moles of F₂
Explanation:
Based on the chemical equation, 2 moles of AlF₃ are produced when 3 moles of F₂ are added in an excess of Al.
Using this expression: 2mol AlF₃ = 3mol F₂ we can find the moles of F₂ as follows:
8.00 mol AlF₃ * (3mol F₂ / 2mol AlF₃) =
You will need 12.0 moles of F₂If the temperature of a gas changes but the number of moles and volumes remain which is the values must also change ?
Answer:
As the pressure rises, the volume also rises. As the volume lower, the pressure lowers.
What is the electron configuration of a ground-state Nb2+ ion? Select one: a. 1s22s22p63s23p64s23d104p65s24d1 b. 1s22s22p63s23p64s23d104p64d3 c. 1s22s22p63s23p64s23d104p65s14d2 d. 1s22s22p63s23p64s23d104p64d5 e. 1s22s22p63s23p64s23d104p65s24d3
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of Nb²⁺ is [Kr]4d³.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of Nb is 41. The electronic configuration of Nb is [Kr] 4d⁴ 5s¹. The electronic configuration of Nb²⁺ is [Kr]4d³. Nb²⁺ also has an odd number of valence electrons. The superscripts represents the number of electrons in each orbitals.
Therefore, the electronic configuration of Nb²⁺ is [Kr]4d³.
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im I wrong on this question?
Answer:
I don't think so
Explanation:
That's what I got
Petroleum is a mixture of hydrocarbons. It is separated into useful fractions by fractional distillation.
Which property does fractional distillation rely on to separate petroleum?
Explanation:
Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points
Hope this help u
2. What volume of a 1.60 mol/L stock solution of calcium chloride would you use to make a 530 mL of a
0.34 mol/L solution? (2 marks)
Answer:
112.625 mL
Explanation:
Applying,
ML = M'L'.................... Equation 1
Where M = Initial molarity or concentration of calcium chloride, L = initial volume of calcium chloride, M' = Final molarity of calcuim chloride, L' = Final volume of calcuim chloride.
make L the subeject of the equation
L = M'L'/M................ Equation 2
From the question,
Given: M = 1.60 mol/L, M' = 0.34 mol/L, L' = 530 mL
Substitute these values into equation 2
L = (0.34×530)/1.60
L = 112.625 mL
Which chemical equation represents a synthesis reaction?A.HCl + LiOH → LiCl + H2OB.2Na + MgCl2 → 2NaCl + Mg.H2CO3 → H2O + CO2D.C + O2 → CO2
Answer:
H20 +CO2 >H2CO3
Explanation:
Please don't report me just want to help and if this helped please leave a heart.
The chemical reaction that represents a synthesis reaction is C +O2 → CO2.
What is a synthesis reaction?A synthesis reaction is a type of chemical reaction in which new compounds or substance are formed from the interaction of two elements.
It is the formation of new substances or products.
Therefore, The chemical reaction that represents a synthesis reaction is C +O2 → CO2.
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