The density of the larger broken piece from the original piece would remain 1.500 g/cm3
DensityDensity = mass/volume
The ratio of mass to the volume of a substance is constant.
Thus, for the long glass stirring rod, a reduction in the length means a reduction in its volume. Also, there would be a commensurate reduction in the mass of the glass rod.
At the end of the day, the ratio of mass/volume of the glass rod, be it the larger or the smaller piece, remains the same.
Thus, the density would remain 1.500 g/cm3.
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According to the passage, which of the following is an example of a simple machine that makes our work easier?
A
a lawnmower used to cut the grass
B
a laptop computer that fits easily in a backpack
C
a pulley that lifts an elevator off the ground
D
a remote control for the television
Answer:
C, A pulley that lifts an elevator off the ground
Explanation:
Basically, it's just easier than a human doing it because that would probably be too much work for humans.
Answer:
C
Explanation:
A scientist studies weather patterns to learn where and how fast the wind blows in different situations. How might this scientific knowledge be used to solve a practical problem?
It could help to decide where to put windmills to capture wind energy.
It could help to predict when dangerous storms are coming so people can prepare.
It could help in designing buildings so that they are not damaged by wind.
All of the above.
Scientific knowledge be used to solve a practical problem through all of the above which are:
It could help to decide where to put windmills to capture wind energy.It could help to predict when dangerous storms are coming so people can prepare.It could help in designing buildings so that they are not damaged by wind.What is Wind?This is defined as the movement of air and other gases on the surface on the earth. Wind intensity varies according to various factors and it's best to study it as helps to prepare for unforeseen circumstances.
Its knowledge helps in the building of windmills so as to ensure efficient capture of winds.
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explain how matter and energy cycle through the Chaparral
Answer:
the scrubby plants in the chaparral biome fix CO2 from the atmosphere through photosynthesis and store carbon as starch. The energy from these carbohydrates is passed on to animals and insects that consume the plants. These primary consumers will pass on the carbon’s energy to other animals that prey on them. When plants or animals die and decompose, the carbon in their bodies returns to the earth. Fossil fuels, which are made from ancient decomposed matter, release carbon back into the atmosphere as CO2 when they are burned
What type of bonds do halogens form in binary compounds?
A. Ionic
B. Covalent
C. Metallic
Which type of molecule gives plants their firm structure?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
??
The type of molecule which gives plants their firm structure Carbohydrates (option A) as there develop cellular structures like cell walls or stems .
What are the importance of carbohydrates to plants?Complex organic compounds called carbohydrates serve multiple functions for plants- primarily as their primary energy source and secondly to build specific cellular structures like cell walls or stems. Undoubtedly, one of the most ubiquitous types of carbohydrates seen in these green wonders is cellulose which plays a dominant role in maintaining their structural integrity.
Cellulose consists of tightly intertwined chains formed by glucose molecules whose interaction results in exceptional durability making it paramount for plant rigidity and survival alike.
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why did the US Air Force study water vapor and Co2 in the atmosphere ? what did they learn?
Answer:
The U.S. Air Force needed to understand the atmosphere for communications and to design heat-seeking missiles. At certain wavelengths carbon dioxide and water vapor block radiation. So the new missiles couldn't see very far if they used a wavelength that CO2 absorbs.
Explanation:
Look at the following elements and tell what information you can deduce from the given data.
1. Calcium 20 = Group 2 & Period 4
2. Oxygen = Group 6A & Period 2
What is the IUPAC name for NH3?
ammonia
mononitrogen hydride
mononitrogen trihydride
nitrogen trihydride
Answer:
The IUPAC name for NH3 would be Azane
Explanation:
Answer: 1. nitrogen trihydride
2. ammonia
Explanation: 1.Choose the correct name for NH3 according to the naming system being used. What is the IUPAC name for NH3?
2. What is the common name for NH3?
Suppose we redefine the standard state as P= 2 bar . Find the new standard ΔfG∘ values of the following substances.
a) HCl(g)
b) N2O(g)
c) H(g)
We have that the new values of the following substances HCl(g), N2O(g), H(g) is that the remain the same as
dG=dH-TdS remains the same.
Standard ΔfG∘ values of substances.Question Parameters:
s P= 2 bar
HCl(g)
N2O(g)
H(g)
Generally the equation for the Change in Heat energy is mathematically given as
dG=dH-TdS
Where
dH=CpdT
Therefore, With no change in entalpy dH only changes when there is a change in dT
dS=CpInT
With dS independent of pressure S is constant
Hence, dG=dH-TdS remains the same
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Sodium gives up the single electron in its outer shell in a reaction leaving it with 11 protons and 10 electrons
True or false?
A student investigates the motion of a toy vehicle. The student graphs 40 seconds of data from the investigation.
Motion of a Toy Vehicle. Distance, meters. Time, seconds.
Which statement best describes the motion of the toy vehicle during the first 30 seconds of the investigation?
The vehicle was traveling at a constant speed.
The vehicle was accelerating at a constant rate.
The speed of the vehicle was increasing.
The acceleration of the vehicle was increasing.
Although we do not have the graph needed to answer this question, we can confirm that if the toy were to be accelerating, one should see this on the graph as a curved line.
How can we know if the toy was accelerating?When graphing motion in terms of distance over time, we can use the shape of the line in the graph to determine if the speed is constant or if there is an acceleration present. If the line is straight, the speed is constant, but if there is a curve, there will be acceleration.
Therefore, we can confirm that if the toy were to be accelerating, one should see this on the graph as a curved line.
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What is the percent composition of each element in CaCO 3 ? ( Mass of Element divided by mass of Compound) x 100
Answer:
molar mass of CaCO3=40+12+3(16)
=100 gmol-1
Ca percent composition=40/100*100%
=40%
C percent composition=12/100*100%
=12%
0 percent composition=48/100*100%
=48%
Answer:
Since we're sticking with theoretical values instead of experimental, Percent Composition would be (Molar Mass of the element) / (Molar mass of compound) x 100%
Molar mass of Calcium: 40g/mol
Molar mass of Carbon: 12g/mol
Molar mass of Oxygen: 16g/mol
Molar mass of CaCO3 (Calcium Carbonate) = (40) + (12) + (16)*3 = 100g/mol
Percentage composition of Calcium = [tex]\frac{40}{100} \ * \ 100 =[/tex] 40% of Calcium
Percentage composition of Carbon = [tex]\frac{12}{100} \ * \ 100 =[/tex] 12% of Carbon
(For the next one, there are 3 oxygen, so it'd be 16x3 = 48g/mol)
Percentage composition of Oxygen = [tex]\frac{48}{100} \ * \ 100 =[/tex] 48% of Oxygen
Write the rate law for the following reaction given that the order of A = 2, B = 1, and C = 0. A + B + C ———> D + E
If the concentration of C is doubled, what will happen to the rate of the reaction?
Answer:
The rate law is:
[tex]\displaystyle \text{Rate} & = k[A]^2[B][/tex]
Doubling the concentration of C will have no effect on the rate of the reaction.
Explanation:
We want to write the rate law for the reaction:
[tex]\displaystyle A + B + C \longrightarrow D + E[/tex]
Where the order of A, B, and C are 2, 1, and 0, respectively.
The rate law will have the form:
[tex]\displaystyle \text{Rate} = k [A]^m[B]^n[C]^p[/tex]
Where m, n, and p are their respective order of reactions.
Hence, the rate law is:
[tex]\displaystyle \begin{aligned} \text{Rate} & = k[A]^2[B][C]^0\\ \\ & = k[A]^2[B] \end{aligned}[/tex]
Because the order of reaction to C is 0, changing its concentration will have no effect on the rate law.
How many grams of HNO3 are produced when 57.2 g of NO2 completely reacts?
Answer:
Who was the first president of United States?
A Benjamin Franklin
B George Washington
C Abraham Lincoln
D John Adams
Answer:
High points please help *NO TROLL ANSWERS*
kayla wants to find the width, AB, of a river. she walks along the edge of the river 150 ft and marks point c. then she walks 32 ft further and marks point D. she turns 90° and walks until her location, point A, and point C are collinear. she marks point E at this location, as show.
what is one advantage of using a computer over a graphic calculator?
Answer:
Computers are more useful for quick calculations.
Computers are easier to transport to remote locations.
Computers have lower power consumption.
Computers hold larger amounts of data.
give brainliest pls
How is nitrite related to nitrate?
Answer:
here
Explanation:
Nitrates and nitrites are interrelated by oxidation reduction; nitrite is the breakdown product of nitrate. Many experts believe that nitrates are relatively harmless until they break down into nitrites.
Use the electron configurations and the periodic table to answer the question
Answer:
Nitrogen
Explanation:
1 arrow = 1 electron
there are 7 arrows = 7 electrons
Nitrogen has 7 electrons or 7 protons
8. Choose the best answer.
The measurement of enthalpy changes caused by chemical reactions, changes of state, or the formation of a solution is called ______.
options:
organics
thermochemistry
calorimetry
analytics
themodynamics
Answer:
the answer is themodynamics
help I can't find the answers
Answer:
baking soda - sodium hydrogen carbonate
bleach (liquid) - sodium hypochlorite
bleach (solid)- sodium hypochlorite
borax- sodium tetraborate decahydrate
brimstone- magnesium sulfate heptahydrate (sulfur)
cream of tartar- potassium hydrogen tartrate
Epsom salt- magnesium sulfate
Freon- Dichlorodifluoromethane
galena- gray lead sulfide
grain alcohol- ethanol
graphite- carbon silicon family
gypsum- calcium sulfate
hypo- sodium thiosulfate
laughing gas- nitrous oxide
lime- calcium hydroxide
limestone- calcium hydroxide
lye- sodium hydroxide
(i'll finish the rest later)
Explanation:
What is the molar mass of AICI3?
Answer:
133.34 g/mol
Explanation:
Provide the correct IUPAC name for the compound shown here.
Answer:
Cis-2-methyl-3-hexene
Cis-2-methyl-3-hexene is the IUPAC name for the compound shown here.
What is compound?In chemistry, a compound is a material made up of two or more separate chemical elements mixed together in a specific proportion. When elements interact with one another, chemical bonds that are difficult to break are formed. Atoms share or trade electrons, which results in the formation of these bonds.A compound is a substance formed through the chemical combination of two or more elements. Ionic and covalent bonds are two common types of bonding used to join substances to form compounds. Each component of any compound is always present in a specific proportion.A compound is a chemical substance made up of identical molecules made up of atoms from multiple elements held together by chemical bonds.To learn more about compound refer to:
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cf2br2 structural formula
Answer:
Here, this may help you:
https://brainly.in/question/28298343
Explanation:
The second law of thermodynamics states that all energy transformations result in an increase in entropy (disorder). If so, how does photosynthesis, which is an energy transformation, create order rather than disorder
Answer: Through photosynthesis carbon dioxide and water is converted to glucose which is more ordered.
Explanation:
Besides that initial consideration there is solar energy being added to the reaction which might be worth noting.
More important to note is that organic molecules/compounds such as glucose are higher in order compared to inorganic molecules/compounds such as water.
which of the following happen when you heat a solid
Answer:
Is the solid an explosive?
Explanation:
..because then it would blow up.
Everything else would melt and phase transfer would occur from a solid to liquid.
how many moles of iron are needed t react with 16 grams of sulfur?
Answer:
adwasd
Explanation:
What NEVER happens while a mixture is being separated?
Answer:
Componets of Homogenous mixture cannot be seperated by using physical methods
Explanation:
hope it helps,God bless
Help please I’ll give 5 stars
Calculate the percentage of zinc I zncl2
Answer:
47.8 %
Explanation:
Ar of Zn = 65
Mr of ZnCl2 = 65 + (2 * 35.5)
= 65+ 71
= 136
Percentage Composition
= ( Ar of element × No of atom in formula ) / Mr of compound * 100 %
% composition of Zn = ( 65*1 )/ 136 × 100 %
= 47.7941...
= 47.8 % ( 3 s.f )
How do you find the delta H per grams in an chemical formula
Answer:
•How do you find the delta H per grams in an chemical formula
➢ Subtract the sum of the heats of formation of the reactants from that of the products to determine delta H: delta H = –110.53 kJ/mol – (–285.83 kJ/mol) = 175.3 kJ.
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How Can I prepare Conc. of Ethanol in water 25% …?
Answer:
25 percent solution by mass of ethanol means that 100 gram of solution contains 25 gram of solute i.e-ethanol. Now,as the density of the solution is 1 g/ml so 100 g of the solution has a volume of 100 ml. So,we have 25 gram of ethanol in 100 ml of the solution. So we have 250 g of ethanol in 1 litre of solution.
Explanation: