The job duties of a forensic toxicologist include: Evaluating determinants or contributory factors in the cause and manner of death. Performing human-performance forensic toxicology, determining the absence or presence of drugs and chemicals in the blood, hair, tissue, breath, etc
How many grams are there in 6.02x10^23 molecules of Na(NO3)3?
there are 12 grams in 6.02x10^23 molecules of Na(NO3)3?
describe two layers of skins
There are two layers of skin, the epidermis, and the dermis.
Dermis: Is a special subcutaneous tissue. But deeper in its structures is found under the tissues that includes the muscle, bone and other structeral appearences, within the skin.
Epidermis: This is mainly the outer layer of our skin.
How many moles of zinc oxide can be produced from 2.7 moles of oxygen
Final answer:
Using the balanced chemical equation [tex]2 ZnS + 3 O2 - 2 ZnO + 2 SO2[/tex], it is calculated that 2.7 moles of O2 can produce 1.8 moles of zinc oxide.
Explanation:
To determine how many moles of zinc oxide can be produced from 2.7 moles of oxygen, we need the balanced chemical reaction involving zinc and oxygen forming zinc oxide. The relevant equation is: [tex]2 ZnS + 3 O2 - 2 ZnO + 2 SO2[/tex].
From the equation, we can see that 3 moles of oxygen react to produce 2 moles of zinc oxide. Therefore, if we start with 2.7 moles of oxygen, we can use a simple ratio to find the number of moles of zinc oxide produced:
3 moles of O2 produce 2 moles of ZnO.
2.7 moles of O2 will produce (2.7 moles O2 * 2 moles ZnO / 3 moles O2) = 1.8 moles of ZnO.
Thus, 1.8 moles of zinc oxide will be produced from 2.7 moles of oxygen.
a (n) ____ in a molecule influence the way that a molecule reacts
A) lipid
B) hydrocarbon
C) organic compound
D) functional group
This is a Functional Group
Functional groups are responsible for chemical reactions of molecules.
The Gulf Stream is a current that carries water north along the eastern coast of the United States. Which of the following describes the flow of water in the Gulf Stream?
A.
Cool water follows a path to join other cool water.
B.
Warm water follows a path to join other warm water.
C.
Warm water is carried to cooler parts of the ocean.
D.
Cool water is carried to warmer parts of the ocean.
The correct answer is - C. Warm water is carried to cooler parts of the ocean.
The Gulf Stream is warm ocean current. It is an ocean current that originates from the Caribbean region, where it is constantly warm throughout the year. Because of that, the water is warm as well, and since the warm water is less dense, it moves on the surface. The movement is toward the higher latitudes, where this current, as a surface movement of the water, is bringing warmer water to the cooler areas, such as the eastern coast of the United States. Not only that warm water is brought to these areas, but the Gulf Stream also brings in warm and moist air masses with it, making the climate much more mild, and increasing the amount of precipitation.
Answer:
c :warm water is carried to cooler parts of the ocean!!!!
Explanation:
on study island this was right!!!! hope this helped!!;)
what unit is used to measure wave length
wavelenghts are lengths. they are measured in distances.
WaveLENGTH is a LENGTH. As such, any unit of LENGTH can be used to describe it.
The most widely used units are:
-- meter (and its multiples, kilo, deca, centi, milli, micro, nano, etc.)
-- foot
-- inch
how does density of air related to elevation (altitude)
Answer:
The density of air goes down as you get higher with altitude.
Explanation:
Less air is pushing down on the molecules below it as you go up. This means that it is not as compacted, another word for which is dense.
The density of the air decreases with the increasing elevation (altitude).
What is altitude?Altitude is the height or distance measured in the up or vertical direction.
The higher the elevation, the less dense the air will be.
There are two reasons for this:
There is less air pushing down from above at higher altitudes, and gravity is weaker further away from the Earth's center.
As a result, air molecules may spread out more at higher altitudes, and air density drops.
Thus, As you go higher, the density of the air drops.
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Which of the following is true about the weight of an object?
A. It remains same for the object.
B.It cannot be measured accurately.
C. It is a force acting on the object.
D.It is always less than the mass of the object.
C because weight has the force of gravity pulling you down
The Barton Springs salamander lives only at the spring outflows of Barton Springs near Austin, Texas. They are often found under rocks or among gravel in water several inches to fifteen feet deep. They can also be found hiding in aquatic plants and algae. They rely on a clear, clean, continuous flow of spring water. They are known to eat amphipods (tiny aquatic crustaceans) and other small aquatic animals. The Barton Springs salamander is clearly capable of living underground, but also inhabits surface environments.
What is the MOST likely way that humans could have a damaging impact on the Barton Springs salamander?
Question 2 options:
Adding new water vegetation
Adding new crustaceans
Polluting the water
Floating down the river
Polluting the water would be the most likely way that humans would endanger them
In an ecosystem where Barton Springs inhabit polluting the water could have a damaging impact on the Barton Springs salamander.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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when fossils fuels are burned what is their chemical potential energy converted into?
This is transformed into electrical energy by the spinning of the turbines.
It would become electrical energy
you need to make 50.00 ml of 0.00100 M NaOH solution. Calculate the volume of 0.0500 M NaOH solution and the volume of H20 to make proper dilution?
Hi!
Answer: 1ml of NaOH and 49 ml of Water
Concentration of NaOH to make: 0.001 M ( C1 )
Volume of NaOH to make: 50 ml ( V1 )
Concentration of NaOH in stock: 0.05 M ( C2 )
Volume of stock to use: V2
Using the formula C1 V1 = C2 V2 which is the standard formula for determining the dilutions to acquire a specified volume and concentration, we get:
0.001 M x 50 ml = 0.05 M x V2
V2 = 1 ml
So using 1ml of 0.05 M NaOH and 49 ml of Water
Hope this helpsWhich of these properties of an unknown liquid can be found using a beaker, a hot plate, and a temperature probe?
f Oxygen level
g Chemical composition
h Boiling point
j Density
I think it is H. Boiling Point
Answer:
Boiling point
Explanation:
If you want to find the boiling point of an unknown liquid, just use beaker, a hot plate, and a temperature probe.
Boiling is characterized by the rapid transition from liquid to gaseous, with the formation of vapors (bubbles) inside the liquid. As in fusion, there is a temperature (boiling point) at which a given substance changes from a liquid to a gaseous state. This temperature is the boiling point.
In the case shown in the question above, you will need to pour the liquid into the beaker and heat it up with the hot plate. With the temperature probe, you will mark the temperature that the liquid started to boil.
describe how carbon becomes locked up in sedimentary rocks.
Over millions of years the layers of sediment become squashed and form sedimentary rocks. The shells of dead marine organisms fall to the sea bed and become part of the sediment. Marine organisms used the dissolved carbon dioxide to make calcium carbonate for shells. Carbon dioxide dissolved in the oceans.
Final answer:
Carbon is locked up in sedimentary rocks through the burial and transformation of organic material from living organisms into fossil fuels and organic-rich rocks like shale and carbonate rocks such as limestone.
Explanation:
Carbon becomes locked up in sedimentary rocks through a series of processes that are part of both the biological and geological carbon cycles. In the biological cycle, living organisms, mainly plants, consume carbon dioxide from the atmosphere to build their tissues. Upon death, this organic material may be buried under sediment and over millions of years, transform into fossil fuels like coal, or become part of organic-rich shale and limestone.
Carbonate rocks like limestone primarily form through the accumulation of marine organisms' calcite shells. The weathering of rocks on land also releases carbon to the soil, which can eventually become part of sedimentary layers. Over time, the carbon from these processes becomes compacted and cemented into sedimentary rocks, thereby locking the carbon away for prolonged periods, typically ranging from tens of millions to billions of years.
What does the number below each element’s symbol represent
Final answer:
The number below each element's symbol on the periodic table refers to the atomic mass, which is different from the atomic number indicated by a subscript to the left of the symbol.
Explanation:
The number below each element's symbol on the periodic table represents the atomic mass of the element. This is different from the atomic number, which is represented as a subscript to the left of the element's symbol. Every element has a distinct symbol, typically the first one or two letters of its name, and the atomic number above each symbol in the periodic table indicates the number of protons in each element. For example, the element Carbon (C) has the atomic number 6, indicating it has 6 protons, and its atomic mass is shown beneath the symbol on the periodic table.
During which segments are two states of matter present?
The answer is D). 2,4
Answer: D) 2,4
Explanation:
_____ is a measure of the average kinetic energy of a gas. Density Enthalpy Pressure Temperature
Answer:
Temperature
Explanation:
Temperature is a measure of the average kinetic energy of the particles in a sample of a gas.Kinetic energy is the energy possessed by an object because of its motion. As an object absorbs heat the particles move faster so the average kinetic energy and therefore the temperature increases.When the temperature of a body or an object is increased and hence the heat, there is more movement or vibration of particles which translates to more kinetic energy.Answer: The correct answer is Temperature.
Explanation:
Temperature is a measure of the average kinetic energy of the particles in a sample of a gas.
an atom has an atomic mass of 27 and 13 neutrons , how many electrons will this atom have?
It will have 27 neutrons and protons because the atomic number is the same as the number of neutrons and protons.
A diatomic molecule shares three pairs of electrons. What type of bond is present in the molecule?
Answer:
Explanation:triple bond
What is the theoretical yield of ethyl chloride in the reaction of 27.17 g of ethylene with 58.33 g of hydrogen chloride? (For ethylene, MW=28.0 amu; for hydrogen chloride, MW=36.5 amu; for ethyl chloride, MW=64.5 amu.) Report your answer to the nearest hundredth of a gram without units.
H2C=CH2 + HCl → CH3CH2Cl
The theoretical yield of ethyl chloride, given 27.17 g of ethylene and 58.33 g of hydrogen chloride, is 62.67 grams.
Explanation:The first step in calculating the theoretical yield is to find the number of moles of each reactant. Given the masses and molecular weights, we find that there are 0.97 moles of ethylene and 1.6 moles of hydrogen chloride. The balanced equation shows that the reaction occurs in a 1:1 ratio, so the limiting reactant is ethylene as we have less of it.
The theoretical yield is therefore based on the amount of ethylene. Given the molar mass of ethyl chloride (64.5 amu), the theoretical yield would be the number of moles of ethylene multiplied by the molar mass of ethyl chloride. Therefore, the theoretical yield of ethyl chloride is 62.67 grams (rounded to the nearest hundredth without units).
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The theoretical yield of ethyl chloride from the reaction of 27.17 g of ethylene with 58.33 g of hydrogen chloride is 62.61 g. Ethylene is the limiting reactant, and the yield is calculated using its moles and the molar mass of ethyl chloride.
To calculate the theoretical yield of ethyl chloride, we need to first determine the limiting reactant between ethylene and hydrogen chloride. We then use stoichiometry to find how much product can be formed from that limiting reactant.
First, calculate the moles of each reactant:
Moles of ethylene (C2H4) = 27.17 g / 28.0 g/mol = 0.9706 molMoles of hydrogen chloride (HCl) = 58.33 g / 36.5 g/mol = 1.5981 molThe stoichiometry of the reaction is 1:1, so:
0.9706 mol of ethylene requires 0.9706 mol of HCl to react completely.Since we have more moles of HCl (1.5981 mol) than ethylene (0.9706 mol), ethylene is the limiting reactant. Now, we calculate the theoretical yield based on the moles of ethylene:
Theoretical yield of ethyl chloride (CH3CH2Cl) = 0.9706 mol * 64.5 g/mol = 62.6137 g
Therefore, the theoretical yield of ethyl chloride is 62.61 g when rounded to the nearest hundredth of a gram.
If the [H+] changed from [1 x 10-7] to [1 x 10-4], what is the new [OH-]?
1 x 10-7
1 x 10-4
1 x 10-3
1 x 10-10
Answer:
1 x 10^-10 M
Explanation:
We know that;
[H+][OH-] = 1 × 10^-14
Therefore;
when [H+] is 1 x 10^-7 then [OH-] will be;
= [1 × 10^-14]/[1 x 10^-7]
= 1 x 10^-7
When the [H+] changes from 1 x 10^-7 to [1 x 10-4]
then the [OH-] will change from 1 x 10^-7 to;
= [1 × 10^-14]/[1 x 10^-4]
= 1 x 10^-10 M
Thus; the new [OH] is 1 x 10^-10 M
3,7-dibromo-4,6-dichloro oct-5-ene-1,2-diol. --- show its structure by photo.
Explanations:- Looking at the given name, the parent chain name is Oct and Oct stands for eight carbons.
The suffix -ene at number 5 stands for a double bond between carbon number 5 and 6.
Bro stands for Br. Since the name has dibromo means there are two Br at number 3 and 7 carbons.
Similarly, there are two Cl at number 4 and 6 carbons.
Suffix -ol is used for OH group. The given name has 1,2-diol means there are two OH groups at number 1 and 2 carbons.
So, to draw the structure of the compound we put 8 carbons in a chain and then but a double bond between number 5 and 6 carbons. Put OH at number 1 and 2 carbons, put Br at number 3 and 7 carbons and Cl at number 4 and 6 carbons. If any of the carbons octet (four bonds) is still incomplete then we attach H atoms to it.
So, the structure of the compound is as given below:
Is the pressure, volume, and temperature of a gas are know, which can most likely be found by using the ideal gas law?
A. The molar amount of gas.
B. The partial pressure of the gas.
C. The standard temp and pressure
D. The molar mass
The molar amount of gas can most likely be found by using the ideal gas law. This is because the ideal gas law states pV = nRT. P, V, and T are the pressure, volume, and temperature, which are the known variables. The R stands for the Universal Constant of Gases; also known. Therefore, the unknown is n, the number of moles (molar amount) of gas, and so you would solve for n from the law.
Answer: A) The molar amount of gas
Credit to: @Edufirst
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there is still good to live for
HELP URGENT!!!!!
Which of these is part of the inner ear?
1. tympanic membrane
2. the ossicles
3. organ of Corti
4. external auditory meatus
The answer is 4. (The word auditory always has something to do with hearing or the ear.)
A company is developing a new type of airplane that can take off like a helicopter. Before they begin manufacturing the airplanes in a large scale, they first build a prototype. What is the main purpose of building a prototype? A: to find a market in which to sell the product B: to train factory workers about how to make the product on a large scale C: to make sure the design works as expected D: to show future customers what the product will look like?
C, to make sure the design works as expected.
A prototype is first, typical model of the said product. Hope this helps!
Answer:
c
Explanation:
Which statement would indicate the presence of an acid? It tastes bitter.. It does not react with active metals. It reacts with active metals to form a gas. It does not change the color of litmus paper
Answer: Option (C) is the correct answer.
Explanation:
Acids are the species which donate a proton or hydrogen ion.
Properties of acids are as follows.
Acids are sour in taste.
They turn blue litmus red.
They react with metals to form a gas.
pH of acids is less than 7.
Acids have a sticky texture.
Answer:
C. It reacts with active metals to form a gas.
Explanation:
edg. 2021
How many grams of product are formed? (Remember the law of conservation of mass) A(20) B(17) C(31) D(34)
Answer: I believe it is B.
The amount of energy required to move an electron from one energy level to the next higher one is known as: A. quantum of energy B. Aufbau principle C. mass number D. atomic number
Answer:
A
Explanation:
Quantum energy
At what point on the hill will the car have zero gravitational potential energy? A) Half-way down the hill. B) At the top of the hill. C) At the bottom of the hill. D) It will never have zero gravitational potential energy
I think it’s c cause height is what determines gravitational potential energy
Answer:
its at the bottom just got it right on usa test prep <3
Explanation:
Convert 0.320 atm to mmhg
760 mmHg = 1 atm Therefore 30 atm = 760 * 3 mmHg = 2280 mmHg p1 = 700 mmHg p2 = 2280 mmHg You can compare them from there. You may also convert mmHg to atm by dividing by 760.
Your answer would be 243.2 mm Hg
Answer: 243.2 mmHg
Explanation:
Pressure is defined as the force per unit area. It is measured in units called as atmosphere , pascal , torr and mmHg.
The conversion factor is :
[tex]1atm=760mmHg[/tex]
If 1 atmosphere corresponds to 760 mmHg
0.320 atm will correspond to = [tex]\frac{760}{1}\times 0.320=243.2mmHg[/tex].
Thus the pressure will be 243.2 mmHg
What is the potential energy of a 2 kg plant that is on a windowsill 1.3 m high
Answer:
P.E = 25.48 J
Explanation:
Given data:
Mass = 2 Kg
Height = 1.3 m
Potential energy = ?
Solution:
Formula:
P.E = m . g . h
P. E = potential energy
m = mass in kilogram
g = acceleration due to gravity
h = height
Now we will put the values in formula.
P.E = m . g . h
P.E = 2 Kg . 9.8 m /s² . 1.3 m
P.E = 25.48 Kg. m² / s²
Kg. m² / s² = J
P.E = 25.48 J
Answer:
PE= 25.48 J
Explanation:
m= 2 kg
h= 1.3 m
PE= ?
m= 2 kg
h= 1.3 m
PE= ?