Answers
Answer:
D. Electronic balance.
Explanation:
The tool that is used to measure an object's mass is the electronic balance, because the graduated cylinder measures volume, the meter stick measures length and the digital thermometer measures temeprature.
Related Questions
What causes blood cells to shrink?
Answers
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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Bromine, a brick red liquid, has a density of 3.12 g/mL at room temperature. What is the mass of 25.6 mL of bromine?
Answers
Answer:
3.12 x 25.6 = 79.9 g
Which of the following natural processes will NOT directly result in the formation of sedimentary rock?
A. River Flow
B. Windstorm
C. Metamorphic change
D. Glacial Motion
Answers
Answer:
Windstorm Hope it helped brainiest plz and thank you have a great day!!!
Explanation:
Which of the following natural processes will NOT directly result in the formation of sedimentary rock?
B. Windstorm
In the citric acid cycle, the acetyl group is removed from acetyl coa and attached to oxaloacetate to form.
Answers
In the citric acid cycle, the acetyl group is removed from acetyl CoA and attached to oxaloacetate to form citrate.
What is acetyl CoA?A component of cellular respiration (energy conversion), acetyl-CoA or acetyl coenzyme A adds acetyl groups to metabolic reactions. These processes are employed in the metabolism of proteins, carbohydrates, and lipids to produce adenosine triphosphate (ATP), lactic acid, and ketone bodies, which serve as energy sources. Acetyl-CoA also has a significant regulatory role in intracellular pathways, according to recent study. In times of fasting or starvation, it is also crucial for energy production.
Formation:
Both inside and outside of the cell mitochondria, acetyl-CoA is formed. Acetyl-CoA must be freely available because it is a metabolite, a component required for metabolism. It can be created through the catabolism (decomposition) of lipids and carbohydrates (glucose) (fatty acids). Transferring the carbon atoms from acetyl to other molecules is its main function.
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When 75.5 grams of phosphorus pentachloride react with an excess of water, as shown in the unbalanced chemical equation below, how many moles of hydrochloric acid will be produced? Please show all your work for the calculations for full credit. PCl5 + H2O --> H3PO4 + HC
Answers
Answer:
Explanation: M(PCL5)= 31 + 5(35.5)
=208.5g/mol
M(H20)= 18g/mol
n(PCL5) = 75.5÷208.5
= 0.362mol
n(HCl)/n(PCL5)= 5/1
n(HCl)= 5×0.362
=1.81mol of HCl
I want to know how to solve this question by step by step.
Question: What is the pH value of 500ml of an aqueous solution of 0.005 mol HCl ?
Answers
The pH value of 500 mL of an aqueous solution of 0.005 mole HCl is 2
How do I determine the pH of the solution?We'll begin our calculations by obtaining the molarity of the solution. Details below:
Volume of solution = 500 mL = 500 / 1000 = 0.50 LMole of HCl = 0.005 moleMolarity = ?Molarity = mole / volume
Molarity = 0.005 / 0.50
Molarity = 0.01 M
Next, we shall obtain the concentration of the hydrogen ion, H⁺ in the solution. Details below:
HCl(aq) <=> H⁺(aq) + Cl¯(aq)
From the balanced equation above,
1 mole of HCl contains 1 mole of H⁺
Therefore,
0.01 M HCl will also contain 0.01 M H⁺
Thus, the concentration of the hydrogen ion, H⁺ in the solution is 0.01 M
Finally, we shall determine the pH of the solution. Details below:
Concentration of hydrogen ion [H⁺] = 0.01 MpH of solution =?pH = -Log H⁺
pH = -Log 0.01
pH = 2
Thus, we can conclude that the pH of the solution is 2
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a. acidic
b. basic
; neutral
d. will not be affected
Find the molarity of 10% NaOH.[MOE 2003
a. 1.5
b! 2.5
c. 4
d. 0.4
10 ml of 2.5 N NaOH is mixed with 20 ml of
N HCI. The mixture is diluted to 100 ml. WI
is the nature of mixture?
IMOF 20
Answers
1. You didn't post the question to Number 1.
2.
10% means There's 10g in 100ml of this solution.
This is the weight/volume(w/v) expression of concentration.
So
We have Mass =10g
volume =100ml
Molarity = Moles of solute/volume of solution(in LITRES)
Moles=Mass/Molar mass
Molar mass of NaOH=40g/mol
Mole=10/40
=0.25mole
Volume =100ml =0.1Litres
MOLARITY=0.25/0.1 =
=2.5M
OPTION B.
3. NOTE: THE MOLARITY AND NORMALITY OF NAOH AND HCL ARE THE SAME(This doesn't happen for all compounds tho)
So We can take 2.5N(Normality) of NaOH to be 2.5M(Molarity) NaOH
I think you forgot to write the Normality of the second one. I'll take it to be 1N. Maybe you can then Input supposed value when you're solving on your own
So
1N HCl is same as 1M HCL
We were given their respective volumes
2.5M NaOH can also be written as 2.5mole/volume(in Liters)
The volume of NaOH =10ml or 0.01L
Moles = 2.5mole/L x 0.01L
You notice that Liters on top and bottom cancels out... leaving the moles
So
Mole=0.01x2.5 = 0.025moles of NaOH
we're gonna do the same for 1N HCl in 20ml(0.02L)
So
Mole = 1 x 0.02 =0.02moles
Total Mole = 0.02 + 0.025 =0.045moles
The Final Volume is 100ml as stated in the question. It was diluted to 100ml or 0.1L
So
Final Concentration In Molarity
= Total Moles/Volume in L
=0.045/0.1
=0.45M.
which of the following quantum numbers (n, l, ml, ms) is not permissible? and why?
a) 1, 0, 0, +1/2
b) 4, 2, -1, -1/2
c) 5, 3, -3, -1/2
d) 2, 1, -1, +1/2
e) 3, 2, -2, -1/2
Answers
In the given set of quantum numbers, the set of quantum numbers which is not permissible or forbidden is 4, 2, -1, -1/2, which is option b.
A quantum number is the set of number, which is used to describe the position and energy of the electron in an atom. There are four types of quantum number, which is principal, azimuthal, magnetic, and spin quantum number.
In first option, by looking at first two numbers it is observed that electron is from 1s orbital and it is half-filled. Hence, it is permissible.
In the second option, electron is from 4d orbital and the electron is filled in \(p_{y}\) orbital. The electron should be filled first in \(p_{z}\) orbital which has ml value -2. Hence, the second set is not permissible.
In the third option, electron is from 5f orbital and it is half-filled in downward position. Hence this set is permissible
In the fourth option, electron is from 2p orbital and it is filled in upward position. Hence, this set is permissible.
In the fifth option, electron is from 3d orbital and it is filled in downward position. Hence, this set is permissible.
Therefore, the set of quantum number which is not permissible is 4, 2, -1, -1/2.
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The parent function f(x) = 1/x has been translated 4 units to the left and 3 units down to create gpx). Which of the following
transformation functions produces g(x)?
g(x) = f(x-3) +4
g(x) = f(x+3) - 4
Oc_g(x)=f(x-4) + 3
Od g(x) = f(x+4) − 3
Answers
The original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.
How to solveThe correct transformation function that reflects a shift of 4 units to the left and 3 units down is g(x) = f(x+4) - 3.
This is because, in function notation, adding to the input value inside the function (x+4) shifts the function to the left, while subtracting from the output of the function (-3) shifts it down.
So, the original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.
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Janine is trying to separate some ethanol from water. Which method should she use does anyone know this
Answers
To separate some ethanol from water, Jane needs to use the method of simple distillation.
Simple distillation is a separation method in which two liquids can be separated from each other based on differences in boiling point.
Since water has a higher boiling point than ethanol, ethanol is collected first as the distillation proceeds.
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watersheds get their water from what 2 places select 2 correct answers
options:
a) surface water
b) people
c)ground water
d) Animals
Answers
Surface water and ground water are two sources of watershed. Thus, option A is correct,
What is watershed?A watershed is an area of land and water where water from many sources collects at a location below the surface of the land. The area of land that surrounds a water source and empties into a single location at a lower elevation is called the watershed.
Surface water is defined as water from rivers, oceans, etc. that is on the same level as the land. Groundwater is the liquid that lies below the surface of the earth or the sea.
For instance, the geographical area that drains into a lake's watershed would include include the streams that enter the lake as well as the streams' final destination, the lake. Large watersheds that include the watersheds of numerous smaller rivers and streams are referred to as drainage basins.
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NaOH is the limiting reactant, producing
2.0 mol Na3PO4. What mass of
Na3PO4 forms during the reaction?
Na3PO4: 164 g/mol
[?] g Na3PO4
Report your answer to two significant figures.
g Na PO
4
Enter
Answers
The mass of Na₃PO₄ formed during the reaction is 328 g.
The balanced chemical equation for the reaction is:
\(3NaOH + Na_3PO_4 - > 3Na_2PO_4 + H_2O\)
From the equation, we can see that 3 moles of NaOH produce 1 mole of Na₃PO₄.
Given that 2.0 moles of Na₃PO₄ is produced, we can set up a proportion to find the amount of NaOH required:
3 mol NaOH / 1 mol Na₃PO₄ = x mol NaOH / 2.0 mol Na3PO4
Solving for x, we get:
x = (3 mol NaOH / 1 mol Na₃PO₄) × (2.0 mol Na₃PO₄ / 1) = 6.0 mol NaOH
So, 6.0 moles of NaOH are required to produce 2.0 moles of Na₃PO₄.
To find the mass of Na₃PO₄ produced, we can use its molar mass:
mass = moles × molar mass = 2.0 mol × 164 g/mol = 328 g
Therefore, the mass of Na₃PO₄ formed during the reaction is 328 g.
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Why does the moon and the sun have the same mass.
Answers
Why does the moon and the sun have the same mass?
Answer: The difference is that, on the moon, you are much lighter than on the Earth, but you still have the same mass
Strontium hydroxide reacts with hydrobromic acid to produce Strontium bromide and
water.
Write and balance the chemical reaction above, use it for problems 1-4 below:
1. If 5.50 moles of strontium hydroxide were consumed, how much moles of water are
produced?
2. Find the mass of hydrobromic acid used to produce 7.50 moles water.
3. If 10.8 g of strontium hydroxide were used, how much moles of strontium bromide are
produced?
4. If 13.3 g of hydrobromic acid were consumed, find the mass of the water produced.
Answers
Sr(OH)2 + 2 HCl --> SrCl2 + 2 H2O
To find the moles of water produced when 5.50 moles of strontium hydroxide are consumed, we need to apply the law of conservation of mass. The mass of water produced is equal to the mass of strontium hydroxide consumed. Since strontium hydroxide has a molar mass of 142 g/mol and water has a molar mass of 18 g/mol, 1 mol of strontium hydroxide can produce 9 mol of water. Therefore, 5.50 moles of strontium hydroxide can produce 49.5 mol of water.
Similarly, 7.50 moles of water can be produced by reacting 18 moles of hydrobromic acid with strontium hydroxide. Hydrobromic acid has a molar mass of 79.9 g/mol, so 18 moles of hydrobromic acid would have a mass of 79.9 * 18 = 1435.2 g.
To find the moles of strontium bromide produced when 10.8 g of strontium hydroxide is used, we need to apply the law of conservation of mass again. The mass of the strontium bromide produced is equal to the mass of strontium hydroxide consumed. Since strontium bromide has a molar mass of 410 g/mol and strontium hydroxide has a molar mass of 142 g/mol, 1 mol of strontium bromide can consume 3.23 moles of strontium hydroxide. Therefore, 10.8 g of strontium hydroxide can produce 10.8 / 3.23 = 3.34 moles of strontium bromide.
Finally, to find the mass of water produced when 13.3 g of hydrobromic acid is consumed, we need to apply the law of conservation of mass yet again. The mass of the water produced is equal to the mass of hydrobromic acid consumed. Since hydrobromic acid has a molar mass of 79.9 g/mol, 13.3 g of hydrobromic acid would produce 13.3 / 79.9 = 0.166 moles of water.
What is the density of an unknown compound in g/ml if 1.28 pounds of the compound has a volume of 4.50L
Answers
1.28 pounds * 453.59 grams/pound = 580.61 grams
Next, we can use the formula for density:
Density = Mass / Volume
Density = 580.61 grams / 4.50 L
Density = 128.91 g/L
Therefore, the density of the unknown compound is 128.91 g/L or 0.12891 g/mL (since there are 1000 mL in 1 L).
ASAP HELP ME!! Which of the following does the ocean provide?
Question 1 options:
Over half the oxygen we breathe
Climate regulation
Pollution
Food and medicine
Answers
The oceans are fundamental because provide oxygen, climate regulation, and food and medicines.
What are ocean resources?The term ocean resources make reference to the sources of energy and materials obtained from the ocean.
The ocean produces more than 50% oxygen we can breathe from the air and also absorbs carbon dioxide.
The ocean is also fundamental in climate regulation to dissipate heat from the equator to the North and South poles.
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Calculate the pH after 0.2 mole of HCI is added to 1.00 L of a solution that is 1.00 M HNO₂ and 1.00 M NaNO2.
Select one:
a. 3.48
b. 3.22
c. 3.33
d. 2.33
Answers
A weak acid (or base) and its corresponding conjugate base (or acid) make up a buffer solution. If only a modest amount of base or acid is supplied, it can withstand pH fluctuations. pH of the solution is 3.48 .
Thus, The Henderson-Hasselbalch equation can be used to express the pH of a buffer solution.
The pH scale gauges a substance's acidity or basicity. The pH scale has numbers 0 through 14. Seven is the neutral pH. Acidic conditions have a pH under 7. More than 7 pH is considered basic.
Each whole pH number below 7 is ten times more acidic than the next higher value since the pH scale is logarithmic. For instance, pH 4 is 100 times (10 times 10) more acidic than pH 6, while pH 5 is ten times (10 times) more acidic than pH 4.
Thus, A weak acid (or base) and its corresponding conjugate base (or acid) make up a buffer solution. If only a modest amount of base or acid is supplied, it can withstand pH fluctuations. pH of the solution is 3.48 .
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Using the reading "Fossil Fuels" from lesson 12 describe the environmental and economic benefits and drawbacks of fossil fuels. Second, looking over the benefits and drawbacks, in your opinion, what do you think will happen to mining of fossil fuels in the next 50 years?
Answers
Fossil fuels are essential part of the power generation in the world. They are easily combustible and more reliable and cheaper. However, the burning of fossil fuels releases toxic gases to the environment.
What are fossil fuels ?Fossil fuels are fuel generated from the decomposition materials. Petroleum, coal, natural gas etc. are fossil fuels which are excavating from the earth.
Fossil fuels are non-renewable sources of energy. Hence, as the existing fossil sources are exhausted no more fossil fuel can be made. It is cheaper, reliable and easy to use.
However, the toxic hydrocarbon gases released from the burning of fossil fuels make the environment polluted. Therefore, overuse of fossil fuel definitely rise the atmospheric pollution.
Its use over the next 50 years, will increase the global warming and more of it will be exhausted.
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What coefficients do you need to balance the following equation?
Li+ AlCl3 LiCl + Al
Answers
You must balance the following equation using the LiCl + Al (lithium + aluminum chloride) constants.
Li cl2 and LiCl balance in what way?Always keep in mind that when balancing equations, only the integers in front of compounds can be changed. To balance the Cl atoms in the equation, add a "2 in front of LiCl on the product side. To balance the Li atoms on the reactants side of the equation, put a "2" in front of the Li.
How does L appear in a chemical equation?The (l) symbol indicates that the substance is a liquid. The (aq) symbol indicates that the compound is dissolved in water and stands for aqueous in water.
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If there is sufficient fossil fuel , how will we cope ?
Answers
If there is sufficient fossil fuel, we will cope by utilizing it in a responsible and sustainable manner while actively transitioning towards alternative energy sources. Coping with the abundance of fossil fuels requires a multi-faceted approach that considers environmental, economic, and social aspects.
To cope effectively, we can:
1. Promote energy efficiency: Invest in technologies and practices that minimize energy waste and maximize efficiency in all sectors, including transportation, industries, and buildings.
2. Transition to renewable energy: Increase the adoption of renewable energy sources such as solar, wind, hydro, and geothermal power. This reduces our reliance on fossil fuels and mitigates environmental impacts.
3. Implement policy measures: Enact policies that incentivize the use of renewable energy, discourage excessive fossil fuel consumption, and promote sustainable practices.
4. Invest in research and development: Support and fund research efforts aimed at developing cleaner and more sustainable energy technologies, such as advanced battery storage, hydrogen fuel cells, and carbon capture and storage.
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Two samples of carbon come into contact. A heat transfer will occur between sample A and sample B. What must be
true for heat to transfer from sample A to sample B?
O The average kinetic energy of A is greater than that of B.
O The average kinetic energy of B is greater than that of A.
O The average kinetic energy of both samples is equal.
O The average kinetic energy does not determine the direction of heat transfer.
Answers
The direction of heat transfer between two samples of carbon depends on their temperature difference, and not solely on their average kinetic energy. While the average kinetic energy of a substance is related to its temperature, it is not the determining factor for the direction of heat transfer.
When two samples of carbon come into contact, a heat transfer will occur between sample A and sample B. The direction of heat transfer is dependent on the temperature difference between the samples. Heat transfer always flows from a hotter object to a cooler object, so if sample A is hotter than sample B, heat will flow from A to B. If sample B is hotter than sample A, heat will flow from B to A.
The average kinetic energy of the molecules in a substance is related to its temperature. The higher the average kinetic energy, the higher the temperature of the substance. However, the average kinetic energy does not determine the direction of heat transfer.
It is possible for a substance with a lower average kinetic energy (and therefore a lower temperature) to transfer heat to a substance with a higher average kinetic energy (and therefore a higher temperature). This can occur if the substance with the lower temperature has a greater heat capacity, which means it can absorb more heat without a significant increase in temperature.
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Read the scales of this balance.
The unknown sample has a mass of:
11.2 g
01.012 kg
1.220 g
O 1.200 g
Answers
Answer:
and I'll call you when the party's over
quiet when I'm come in home
when I'm all alone
Answer:
Explanation:
Don't you know too much already?
I'll only hurt you if you let me
Call me friend but keep me closer (call me back)
And I'll call you when the party's over
Which of these is not used to make models of interstellar medium?
Material from meteorites.
Minerals.
Synthetic materials.
Burnt wood ash.
Answers
Material from meteorites are not the elements used to make models of interstellar medium. The correct option is A.
What is interstellar medium?The matter and radiation that prevail in the space between star systems in a galaxy are referred to as the interstellar medium in astronomy. This matter consists of gas including ionic, atomic, and molecular, dust, and cosmic rays.
Meteorite material is not used to create models of the interstellar medium.
Thus, the correct option is A.
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Why do you think it is important that the procedures of a science lab report be written so that another person could perform your experiment exactly the way you performed it?
Answers
Answer:
for example the company has been in the United kingdom for women who have a lot to say it is not the only one that has the best of
Explanation:
get a little bit more of the year and
Answer:
for example the company has been in the United kingdom for women who have a lot to say it is not the only one that has the best of
Explanation:
How many liters of carbon dioxide gas are in 18.6 moles of CO2 at STP?
Answers
Answer:
416.876
Explanation:
Uhmm I am so so very sorry if this is incorrect
Convert a length of 15.0 m to inches
Answers
Answer:
15 meters = 590,551 inches
Guys I need help with this ASAP! An atom of Iron has a mass of 56 atomic mass units. What is the number of protons and the number of neutrons in the nucleus?
Answers
Answer:
protons = 26; neutrons = 30
Explanation:
protons = atomic number; neutrons = atomic mass – # of protons.
4. Calculate the pH of 0.90M HPO4?Ka HPO4^2- = 4.5 x 10-13(a) 7(b) 14(c) 12.3(d) 8.20(e) 6.20
Answers
Answer
Explanation
Given:
[H⁺] = 0.90 M
Ka HPO₄²⁻ = 4.5 x 10⁻¹³
What medal has the highest volume?
Answers
The Medal of Honor is the best navy decoration and highest volume.
The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.
The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a
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