In scotland, the legal blood alcohol limit is 220 μg of alcohol per 1 l of breath. what is this alcohol concentration in parts per billion, ppb?
Answers
In Scotland, the legal blood alcohol limit is 220 μg of alcohol per 1 L of breath. To convert this alcohol concentration to parts per billion (ppb), we need to consider the conversion factor between micrograms and parts per billion.
To convert micrograms to parts per billion, we can use the following conversion factor:
1 μg = 1 ppb
So, the alcohol concentration of 220 μg/L can be directly converted to 220 ppb.
Therefore, the alcohol concentration in parts per billion (ppb) is 220 ppb.
Please note that this is a straightforward conversion since 1 μg is equal to 1 ppb. However, in some cases, different conversion factors may be required. If you have any further questions, feel free to ask!
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Related Questions
If we have a line with points (0,0) (2,4) (4,8) what is the unit rate of this line?
Answers
Answer:
2
Explanation:
Use slope formula (y2-y1 over x2-x1) and use 2 coordinates
4-0= 4 2-0=2 4/2 simplifies to 2
Unit rate is 2
Hope this helped
A calorimeter is to be calibrated: 51.203g of water at 55.2c is added to a calorimeter containing 49.783g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6c. calculate the calorimeter constant.
Answers
The calorimeter constant when 51.203g of water at 55.2c is added to a calorimeter containing 49.783g of water at 23.5c and for the system to equilibrate, the final temperature reached is 37.6c is 9.67J/gc.
Given mass of water (m1) = 51.203g
Temperature of water (T1) = 55.2c
mass of water (m2) = 49.783g
Temperature of water (T2) = 37.6c
the final temperature reached is = 37.6c
We know that specific heat (Q) = mCpΔT where m is mass Cp is latent heat and ΔT is change in temperature.
So Qwater = 51.203 x 4.184 x (23.5 - 55.2) = 6791.9J
Qcalo = 49.783 x Cp x (23.5 - 37.6) = 701.9 x Cp
Given that Qwater = Qcalo
6791.9J = 701.9 x Cp
Cp = 9.67J/gc
Hence the calorimeter constant is 9.67J/gc
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HELP DUE TODAY
Identify three characteristics that will be passed down to the offspring of this apple tree.
its a write your answer
Answers
Answer:
eyes hair skin
Explanation:
eyes you can get from parents skin and hair
What are this named?NaOH, KOH, Ca(OH)â‚‚, Sr(OH)â‚‚, Ba(OHâ‚‚
Answers
The compounds named are all metal hydroxides. These compounds are all formed by the reaction of a metal oxide or metal with water.
The compounds named are all metal hydroxides. NaOH is sodium hydroxide, KOH is potassium hydroxide, Ca(OH)2 is calcium hydroxide, Sr(OH)2 is strontium hydroxide, and Ba(OH)2 is barium hydroxide.
These compounds are all formed by the reaction of a metal oxide or metal with water. They are strong bases that can dissociate in water to form hydroxide ions (OH-) and metal cations. Sodium hydroxide and potassium hydroxide are commonly used in the production of soaps, detergents, and other chemicals. Calcium hydroxide is used in the production of cement, while strontium hydroxide and barium hydroxide are used in the production of ceramic materials and glass.
These metal hydroxides are also important in various industrial processes, such as in the production of paper, textiles, and food products. They can also be used as strong bases in chemical reactions and in laboratory experiments.
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Amy watches as her teacher adds a small
piece of sodium to water. She makes these
observations.
The sodium moves around on the surface of the water
Bubbles are formed.
After the reaction finished, the teacher added Universal
Indicator to the solution. The indicator went purple.
a) Explain what the bubbles show?
b )Explain why the indicator went purple?
Answers
Answer:
Explanation:
A) bubbles show hydrogen gas escaping
B) the water reacted with sodium to form an alkaline solution
How many moles of aluminum are needed to react completely with 1.8 mol FeO?
2Al + 3FeO ---> Al2O3 + 3Fe
Show work pls
Answers
Answer:
1.2 mol
Explanation:
3 mol of FeO reacts with 2 mol of Al so for 1.8 mol of FeO reacts with
1.8 x 2/3=1.2 mol of Al
What are two reasons that ICl has a low melting point?
Answers
Answer:
1. It is a covalent bond and all covalent bonds have low melting points
Explanation:
Physical weathering caused by the action of freezing water
Answers
Answer:
Frost action involves the ~weathering~ processes caused by repeated cycles of freezing and thawing.
Explanation:
Answer: Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
Explanation:
the mass in grams of one mole of any pure substance is called its
Answers
Answer:
this
Explanation:
Molar mass also called Atomic mass is the atomic weight. You can find this on the periodic table.
-
-
The answer would be
A. the mass in grams of one mole of a substance
Explain why a climax community is not always a forest.
Answers
Which of the following options correctly describe the mechanism of radical polymerization? Select all that apply.
o Formation of a radical by the radical initiator is the first step in this process.
o The combination of two radicals will terminate the polymerization process.
o The first step is homolytic cleavage of the alkene C=C bond to form two radicals. o Each propagation step involves the addition of two carbon radicals. Each propagation step involves the reaction of a carbon radical with another molecule of monomer.
Answers
The mechanism of radical polymerization involves the formation of a radical by the radical initiator as the first step in the process.
The first step is homolytic cleavage of the alkene C=C bond to form two radicals. Each propagation step involves the addition of a carbon radical to another molecule of monomer. The combination of two radicals will terminate the polymerization process. Therefore, the correct options that describe the mechanism of radical polymerization are:
- Formation of a radical by the radical initiator is the first step in this process.
- The first step is homolytic cleavage of the alkene C=C bond to form two radicals.
- Each propagation step involves the reaction of a carbon radical with another molecule of monomer.
- The combination of two radicals will terminate the polymerization process.
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This element has nine more electrons than Technetium
Answers
Answer:
Tellurium
Explanation:
Technetium's position on the periodic table is 43 and Tellurium's is 52
All atoms of a given element contain
A. the same number of protons but different number of neutrons.
B. the same number of neutrons but a different number of protons.
C. the same number of neutrons and protons.
D. different numbers of neutrons and protons.
Answers
All atoms of a given element contain the same number of protons but different number of neutrons.
What is atom ?The smallest component of ordinary stuff that makes up a chemical element is an atom. Atoms that are neutral or ionized make up every solid, liquid, gas, and form of plasma. Atoms are very tiny, measuring approximately 100 picometers across.
Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus. Only the most prevalent kind of hydrogen is neutron-free. The nucleus of an atom contains more than 99.94% of its mass.
Although the number of protons in the nucleus is the same for all atoms of the same chemical element, the number of neutrons is not. As a result, atoms of the same chemical element do not always have the same mass.
Thus, option A is correct.
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HELPPPP PLEASEEEE NAME THESE MOLECULES PLEASEEE
Answers
Answer:
1. carboxylic acid
2. ether
3. aldehyde
4. ketone
5. amine
6. alcohol
Explanation:
Know the functional groups. If you would like me to teach you them let me know.
- Hope that helps! Please let me know if you need further explanation.
Which of the following is a water contaminant that can cause acid mine drainage?
a. flux c. methane
b. carbon dioxide d. sulfuric acid
Answers
d. Sulphuric acid is a water contaminant that can cause acid mine drainage.
Sulphuric acid is the compound which is produced when certain minerals, such as pyrite, are exposed to water and air, resulting in a chemical reaction that creates sulphuric acid. The acid then contaminates the surrounding water and acts as a water contaminant , causing acid mine drainage and potential harm to the environment and ecosystems.
Sulphuric acid is a compound which is corrosive and has a strong acidic character. It functions as an oxidising and dehydrating agent at greater doses. It is a colourless, odourless liquid that has the consistency of syrup. It is soluble in water and produces heat when dissolved. It is extensively employed in the production of fertilisers. Additionally, it is employed in wastewater treatment and chemical synthesis. Anhydrous sulphuric acid is a highly polar liquid with a dielectric constant of about 100. With extensive applications across numerous industries, it is arguably the most significant heavy industrial chemical. Sulphuric acid is a very potent acid that totally ionises in aqueous solutions to produce hydrogen sulphate ions (HSO4) and hydronium ions (H3O+).
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It requires 2,500 joules to raise a certain amount of water (c = 4.186 j/g°c) from 20.0°c to 60.0°c. what is the mass of the water that is being heated? 15 g 40 g 63 g 80 g
Answers
Answer:
15 grams of water will absorb 2,500 Joules in going from 20.0 to 60.0 C.
Explanation:
The heat involved in raising a mass (m) of a substance with a specific heat (c) from one temperature to another (Delta T) is given by:
Heat = mc(Delta T)
2,500 Joules = m*(4.186J/gC)*(60C-20C)
2,500 Joules = m*(4.186J/gC)*(40C)
2,500 Joules = m*(4.186J/gC)*(40C)
m = (2,500J)/(4.186*40J/g)
m = 14.93 grams
Answer: B (15g)
Explanation:
4. Manik saw his father watering his garden plants in hot weather. He noticed that
water doesn’t stick to the plant leaves and leaves become dry but looked fresh. He asked
following questions to his teacher
a. Which tissue forms the outer covering of a plant and does it have a protective role
to play?How ?
b. Why does water not stick to the leaves?
Answers
Water does not stick to the leaves of the plant owing to the fact that the leaves has a waterproof cuticle.
What tissues protects the leaves?We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.
The tissue that plays this outer covering of a plant for is the epidermis and its waxy cuticle. It prevents damage to the plant.
Water does not stick to the leaves of the plant owing to the fact that the leaves has a waterproof cuticle.
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Considering 20 mL of a 2M butanol solution, and after adsorption
on 1. 25 g of activated carbon, obtaining a final concentration of
1. 3 M, it can then be said that the amount of ethanol adsorbed per
gr
Answers
The amount of ethanol adsorbed per gram of activated carbon can be calculated using the given information. The moles of butanol in the solution before adsorption, which is 2M x 0.02L = 0.04 moles.
Then, we calculate the moles of butanol adsorbed on activated carbon, which is 1.3M x 0.02L = 0.026 moles. Finally, we subtract the moles of butanol adsorbed from the initial moles to find the moles of ethanol adsorbed, which is 0.04 moles - 0.026 moles = 0.014 moles.
To find the amount of ethanol adsorbed per gram of activated carbon, we need to calculate the moles of butanol in the solution before adsorption and the moles of butanol adsorbed on activated carbon.
First, we calculate the moles of butanol in the solution before adsorption. Given that the volume is 20 mL and the concentration is 2M, we can use the formula Moles = Concentration x Volume to find the moles of butanol. This gives us 2M x 0.02L = 0.04 moles of butanol.
Next, we calculate the moles of butanol adsorbed on activated carbon. Given that the final concentration is 1.3M and the volume is still 20 mL, we can use the same formula to find the moles of butanol. This gives us 1.3M x 0.02L = 0.026 moles of butanol.
Finally, to find the moles of ethanol adsorbed, we subtract the moles of butanol adsorbed from the initial moles of butanol. This gives us 0.04 moles - 0.026 moles = 0.014 moles of ethanol adsorbed.
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1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50g of the carbon combusts
to form CO₂ and 0.50g of the carbon combusts to form CO.
The resultant mixture of CO₂ and CO is passed through excess NaOH(aq) and the remaining gas
is then dried and collected.
What is the volume of the remaining gas? (All gas volumes are measured at 25°C and
1 atmosphere pressure.)
A 1dm³
B 1.5 dm³
C 2 dm³
D 3 dm³
Answers
Answer:
Explanation:d
an object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 ml to 30.1 ml .what is the density of the object?
Answers
If you left a cup of ice out on the countertop on a hot day, do you think your ice melts because of conduction, convection, or radiation? Explain your answer.
Answers
Answer: Should be conduction (for the explanation bit it's below)
technically its both conduction and convection but if its one answer only then conduction should be right
explain your answer bit:
I think it is conduction because the heat in the environment is being transferred into the ice, which is warming it up until it reaches thermal equilibrium and then eventually evaporates.
hope this helps!
100 cm³ of a gas at 27°C is cooled to 20°C at constant pressure .Calculate the volume of gas at 20°C.
Answers
According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;
\(\begin{gathered} V\alpha T \\ V=kT \\ k=\frac{V}{T} \\ k=\frac{V_1}{T_1}=\frac{V_2}{T_2} \end{gathered}\)where;
V1 and V2 are the initial and final volume of the gas
T1 and T2 are the initial and final temperatures of the gas (in Kelvin)
Given the following parameters:
\(\begin{gathered} V_1=100\operatorname{cm}^3 \\ T_1=27^0C=27+273=300K \\ T_2=20^0C=20+273=293K \\ V_2=\text{?} \end{gathered}\)Substitute the given parameters into the formula;
\(\begin{gathered} V_2=\frac{V_1T_2}{T_1}^{} \\ V_2=\frac{100\times293}{300} \\ V_2=\frac{29300}{300} \\ V_2=\frac{293}{3} \\ V_2=97.67\operatorname{cm}^3 \end{gathered}\)Therefore the volume of the gas at 20°C is approximately 97.67cm³
Please help in a test rn!! also if you could put the answer in the comments pls do!
Answers
Answer:
the rocks in location 2 are permeable.
Consider the intermediate chemical reactions. 2 equations. First: upper C a (s) plus upper C upper O subscript 2 (g) plus one half upper O subscript 2 (g) right arrow upper C a upper C upper O subscript 3 (s). Delta H 1 equals negative 812.8 kilojoules. Second: 2 upper C a (s) plus upper O subscript 2 (g) right arrow 2 upper C a upper O (s). Delta H 2 equals negative 1, 269 kilojoules. The final overall chemical equation is Upper Ca upper O (s) plus upper C upper O subscript 2 (g) right arrow upper C a upper C upper O subscript 3 (s).. When the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed. is halved. has its sign changed. is unchanged.
Answers
Answer: When the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed.
Explanation:
Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.
According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.
The overall chemical reaction follows:
\(CaO(s)+CO_2\rightarrow CaCO_3(s)\) \(\Delta H^o_{rxn}=?\)
The intermediate balanced chemical reaction are:
(1) \(Ca(s)+CO_2(g)+\frac{1}{2}O_2(g)\rightarrow CaCO_3(s)\) \(\Delta H_1=-812.8kJ\)
(2) \(2Ca(s)+O_2(g)\rightarrow 2CaO(s)\) \(\Delta H_2=-1269kJ\)
The expression for enthalpy of the reaction follows:
\(\Delta H^o_{rxn}=[1\times (\Delta H_1)]+[\frac{1}{2}\times (-\Delta H_2)]\)
Hence, when the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed.
Answer:
A. is halved and has its sign changed.
Explanation:
just took the test on edge
Select all that apply. which valences have the greatest tendency to form ions?
a. +1, -1
b. +2, -2
c. +3, -3
d. +4, -4
Answers
Valences have the greatest tendency to form ions, are, +1,-1,+2,-2,+3,-3. All the options are correct.
Valence is the number of electrons lost or gained in a reaction to complete an element's outer energy level.
When an atom gains or loses a valence electron, it forms an ion. Atoms form ions in order to help another to obtain a full octet and to stabilize the valence.
Some atoms gain or lose electrons to form ions because they need to become more stable. They sometimes give them to have an outer shell or gain them to get a closer charge to eight.
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Answer:
+1,-1,+2,-2,+3,-3
Explanation:
1. what type of polymer would you obtain if sorbital (a sugar alcohol found in sugar free gum) was used as a plasticizer addictive?
2a. Starch-borate and starch-glycerol polymers have been used for encapsulation of pharmaceutical drugs or pesticides. Explain what effect ths might have and why it would be beneficial.
2b. Are these polymers considered to be biodegradable? why or why not?
Answers
1. The type of polymer that would you obtain if sorbitol is a polyol.
2a. The use of starch-borate and starch-glycerol polymers for the encapsulation of pharmaceutical drugs or pesticides would have a number of beneficial effects.
2b. Yes, these polymers are considered to be biodegradable.
1. The type of polymer that would you obtain if sorbitol (a sugar alcohol found in sugar-free gum) was used as a plasticizer additive is a polyol. This is because sorbitol is a polyol, which is a substance used to modify the properties of polymers. The process of polymer modification involves adding polyols to the polymer matrix, which helps to reduce the glass transition temperature of the polymer. Sorbitol can be used as a plasticizer addictive because it is a natural and non-toxic compound that is biodegradable.
2a. The use of starch-borate and starch-glycerol polymers for the encapsulation of pharmaceutical drugs or pesticides would have a number of beneficial effects. These polymers are natural and non-toxic, and they are biodegradable, which means that they do not pose a risk to the environment. Additionally, they can be used to modify the properties of the drugs or pesticides, making them more effective and reducing their toxicity.
2b. Yes, these polymers are considered to be biodegradable. This is because they are made from natural materials that can be broken down by biological processes. Starch-borate and starch-glycerol polymers are particularly attractive for use in biodegradable materials because they are non-toxic and biocompatible. They can be used in a variety of applications, including packaging materials, agricultural films, and medical devices, where their biodegradability is an important factor.
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sulfur (S) = 32, and of oxygen (O) = 16.
8. The relative formula mass of a sulfate, ZSO
is 159.5. The relative atomic mass (A) of
What is the relative atomic mass
of element Z?
A
63.5
B 32.5
C 15.5
Answers
Answer:
It should be 115.5 amu but you didnt type that as an answer choice so...
Explanation:
Bruh all you had to do was add oxygen and sulfur and subtract from the total to get your answer :D.
An element X exists as three naturally occurring isotopes. If all isotopes have the same atomic number, what would be the difference in the three isotopes?
Answers
Answer:
the amount of neutrons would be the difference in the three isotopes
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?
Answers
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
10. What is the mass of 2.6 moles of Ag?
O 2.4 x 10-2 g
O 2.9 g
O 280 g
O 1.6 x 1024 g
Answers
Answer: 280 g
Explanation: