The atomic mass of an element is a weighted average of its isotopes in which the sum of the abundance of each isotope is equal to 1 or 100%.
Let fraction of N-15 be x
then fraction of N-14 = 1-x
Formula for Calculating Isotope:
15.001x + 14.00031(1-x)=14.0067
on calculation:
x = 0.006403
so, % = 0.006403 x 100 = 0.6403 %
if you really liked my response, please rate thanks and award brainliest
hope this helped :)
Explain the effect of temperature on oxygen production in the light when the temperature is increased from 40 degrees celsius to 50 degrees celsius
At medium temperatures, between 50 and 68 degrees Fahrenheit, or
10 and 20 degrees Celsius, the photosynthetic enzymes work at their
optimum levels, so photosynthesis rates gauge high.
Explain the effect of temperature on oxygen production :
The photosynthetic enzymes typically operate at their best levels between 50 and 68 degrees Fahrenheit, and any significant departure from this range would slow down photosynthesis.
Despite an increase in the rate of carbon dioxide absorption into leaves at temperatures above 68 degrees Fahrenheit (20 degrees Celsius), the rate of photosynthesis decreases at these temperatures because the enzymes are less effective.
The shape and functionality of the photosynthetic enzymes are lost at temperatures above 104 degrees Fahrenheit (40 degrees Celsius), and the photosynthetic rate rapidly decreases.
Due to the ineffectiveness of the photosynthetic enzymes at low temperatures, specifically between 32 and 50 degrees Fahrenheit (0 and 10 degrees Celsius), the rate of photosynthetic reaction decreases.
To learn more about Photosynthesis, refer
to https://brainly.com/question/24419453
#SPJ4
When the temperature is moderate (between 50 and 68 degrees Fahrenheit), the photosynthetic enzymes function at their peak between 10 and 20 degrees and the photosynthesis rates measure at their highest points.
What is the effect of temperature on O2 production?As a result of the cells having to work harder to maintain a greater temperature, the amount of oxygen the cells require to function is also higher.
The temperature has an impact on photosynthesis's rate.
Photosynthesis occurs more quickly at higher temperatures. This is because the majority of chemical reactions are sped up by temperature and photosynthesis is a chemical reaction.
At 25C, oxygen synthesis is greatest. When the temperature is excessively high or low, oxygen generation decreases.
The negative connection between dissolved oxygen and temperature results in lower concentrations of dissolved oxygen.
Reduced dissolved oxygen levels occur as water temperature rises.
To learn more about the effect of temperature, refer
https://brainly.com/question/1259622
#SPJ4
place these in the correct order to represent photosynthesis
glucose (chemical energy)
carbon dioxide
oxygen
water
The correct order that depicts the process of photosynthesis would be carbon dioxide + water ---> glucose (chemical energy) + oxygen.
What is photosynthesis?
Photosynthesis is a biological process whereby green plants are able to make use of solar radiation to convert inorganic substances in the form of water and carbon dioxide to carbohydrates.
In addition to carbohydrates, oxygen gas is produced as a by-product of the process. The process happens through a series of chemical reactions. Some reactions require light while some do not.
The entire process is summarised by the following equation:
[tex]6CO_2 + 6H_2O --- > C_6H_1_2O_6 + 6O_2[/tex]
The equation can be rewritten in word form as:
carbon dioxide + water ---> glucose (chemical energy) + oxygen
More on photosynthesis can be found here: https://brainly.com/question/1757345
#SPJ1
solids analysis is one of the most widely used parameters for assessing water quality. the following tests were performed on a water sample. the sample volume was 150 ml in each test (filtered or evaporated). calculate the parameters requested using the following data. (15 pts)
The total solids is 300 mg/L, volatile solids is 80 mg/L, total suspended solids is 224 mg/L, total dissolved solids is 76 mg/L and the volatile suspended solids is 26.66 mg/L
CalculationThe data we have is
Mass of evaporating dish, Mtare = 24.1520 g
sample volume V = 150 ml
As per the question
a) Total solids = All the solids present whether suspended or dissolved
= [(Mtare+solids - Mtare) x 1000mg x 1000ml ] / V
= [24.1970 - 24.1520] x 10^(6) / 150
= 300 mg/L
b) Volatile solids = portion of solids which are volatized at 550 C
= [(Mtare+solids - Mtare+ash)] x 10^(6) / V
= 24.1970-24.1850 x 10^(6) / 150
= 80 mg/L
c) Total suspended solids = solids that are non-filterable with specified filters and are not volatilized at 105 C
= [Msus solids+ tare +filter - Mtare+filter x 10^(6)] / V
= 1.4939 - 1.4603 x 10^6 / 150
= 224 mg/L
d) Volatile suspended solids = portion of suspended solids which are volatilized at 550C
= Mss+Tare+filter - Mresidue+Tare+filter x 10^(6) / V
= [1.4939 - 1.4899 x 10^(6)] / 150
= 26.66 mg/L
e) Total dissolved solids = solids which are present in solution and filterable
=(Total solids - total suspended solids)
= (300 - 224)
= 76 mg/L
To know more about solid analysis, visit:
https://brainly.com/question/2930066
#SPJ4
1Table salt is a compound made of sodium and chlorine
atoms .From the table, what can you conclude about the properties of
compounds and the elements they are made of?
Some Properties of Three Substances
Sodium
Chlorine
gas
solid
green
silver
Property
State (at room temperature)
Color
Toxicity
poisonous
poisonous
Table salt
solid
white
not
poisonous
Answer:
This question is to vague. PS: what are you talking about?
Explanation:
This question is to vague. PS: what are you talking about?
If the pellets represent molecules of water, what do you think are the main differences among molecules of ice, water, and vapor?
Thanks
Answer:
Ice: solid and rigid. Water: Liquid and sloshy Gas: light and not dense.
Explanation:
Up ^
Big Pharm Drug Company is conducting research of their new drug Attendomax to improve the note-taking behavior of college students diagnosed with Attention Deficit Disorder. Fifty of the students receive capsules contain Attendomax, another fifty receive capsules which look the same but actually contain the drug Ritalin, which has been used for many years. All students attend the same series of lectures and have their notes collected afterward. Notes are scored for completeness and accuracy. Write down dependent and independent variables in the above case. What is the independant, dependant and control variables.
As per given statement as follows:-
independent variable: The independent variable is the type of drug given to students with Attention Deficit Disorder which is operationally defined as Atttendomax or Ritalin .Dependent variable: The dependent variable is the notes taken by the students which is measured the completeness and accuracyexperimental group is the one receiving Attendomaxcontrol group is the one receiving Ritalin, which is used for yearsgenerally, independent variables are the one manipulated by investigators and study effects. Dependent variables are the measurements and observation by the data collected.
Experimental group are the participants exposed to the independent variable and control group the participants treated same as experimental group but not exposed to independent variables.
Learn more about independent variables and dependent variables here-
https://brainly.com/question/28433016
#SPJ9
At 1 atmosphere and 20 degrees Celsius, all are samples of H2O must have the same a) mass b) density c) volume d) weight
i know the answer is density but someone please explain why, a good explain room please and I’ll mark brainliest!!
At 1 atmosphere and 20 degrees Celsius, all samples of H₂0(l) must have the same density.
The correct option is B.
What does atmosphere mean?The atmosphere of a globe or other celestial body refers to the layers of gases that surround it. Nitrogen makes up around 78% of the chemicals in the Earth's atmosphere, followed by oxygen at 21% and other gases at 1%.
Why is the atmosphere important?It not only shields us from harmful UV solar radiation but also gives us the oxygen we need to survive. Without it, our planet could not sustain the pressure required for liquid water to exist on its surface. It also maintains the planet's temperature and the conditions necessary for life to exist.
To know more about Atmosphere visit:
https://brainly.com/question/26767532
#SPJ9
HELP i think its true
A polyatomic ion is more than one type of element bonding to create a cation or an anion.
true or false
Answer:
It is true.
Explanation:
Its a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero
The vapor pressure of pure cyclohexane is 32 torr at its freezing point of 6.55 celsius. calculate the vapor pressure of the solution in question 3 at this tempertaure.
The vapor pressure of the solution in question 3 at this temperature is
[tex]6.72[/tex] ×[tex]10^{-3}[/tex] torr.
What is vapour pressure?The pressure that a vapor exerts on its condensed phases (solid or liquid) in a closed system at a specific temperature is referred to as the equilibrium vapor pressure (or vapour pressure in English-speaking nations other than the US; see spelling variations).
An indicator of a liquid's evaporation rate is the equilibrium vapor pressure. It has to do with how easily liquid-borne particles tend to elude detection (or a solid). Volatile is a term used to describe a chemical that, at room temperature, has a high vapor pressure.
Vapor pressure is the force that a vapor cloud exerts over a liquid surface. The kinetic energy of a liquid's molecules rises as its temperature climbs.
Learn more about vapor pressure
https://brainly.com/question/2272852
#SPJ4
An atom of an element has 15 protons and 16 neutrons. What is its proton number?
What is its nucleon number?
Answer: 3
Nucleon number is 31
Explanation:
I am the halogen located in the fifth period of the periodic table.Who am I?
Would anyone help me solve all of this?
Answer:
Explanation:de
draw the structure of the two tertiary (3°) alcohols with the molecular formula c6h14o that contain only one ch3 group attached to the main carbon chain.
6. A 5.0 g sample of water has a volume of 5 mL. What is the density of the water?
Answer:
1g/
Explanation:
density=mass÷volume
5g÷5ml
1g/m
In order to change the phase/state of matter (like changing from a solid to a liquid or from a gas back to a liquid), what is added to or taken away from the substance? To go from a solid to a liquid to a gas, is it added or taken away? How about if you change from a gas to a liquid to a solid (added or taken away)?
Melting (from solid to liquid), freezing (from liquid to solid), evaporation (from liquid to gas), and condensation are examples of matter transformations (changing from gas to a liquid).
Melting is the process by which a material transforms from its solid state into its liquid state. Freezing is the transition of a material from its liquid state into its solid state. Evaporation is the process by which a material transforms from its liquid state into its gaseous state. Melting is the process of converting a solid into a liquid. The melting point is the temperature at which a material transforms from a solid to a liquid. At 0 degrees Celsius, water melts.
Heat is applied in this pattern of solid to liquid to gas in order to cause the phase transition.
Condensation is the process by which a material transitions from its gaseous state into its liquid state. Sublimation is the process by which a solid transitions directly from its solid state to its gaseous state.
A physical transition from one state of matter to another, such as from solid to liquid or from liquid to gas, is referred to as a change of state, sometimes known as a phase change.
Learn more about states of matter here
https://brainly.com/question/16982523
#SPJ9
A graduated cylinder has 22ml (cm3) of water placed in it. An irregularly shape object with a mass of 24g is then dropped in the graduated cylinder. If the volume of the graduated cylinder rises up to 30.0ml (cm3), what is the volume of the object
And what is the Density of the odject dropped in to the graduated cylinder.
The volume of the object is 8 cm³ and the density of the object is 3 g/cm³.
What is Archimedes' Principle?
Archimedes' principle states when an object is partially or fully immersed in a fluid, it displaces the portion of the fluid equal to its own weight.
The volume of the object = volume of the water in the cylinder displaced
volume of the object = 30 cm³ - 22 cm³
volume of the object = 8 cm³
Density of the objectThe density of the object is calculated from the ratio of the mass and volume of the object.
density = mass/volume
density of the object = 24 g / 8 cm³
density of the object = 3 g/cm³
Thus, the volume of the object is 8 cm³ and the density of the object is 3 g/cm³.
Learn more about density here: https://brainly.com/question/6838128
#SPJ1
What is the reason for having an engineering design process?
A. To be able to develop the most successful engineering product
B. To complete a scientific experiment
C. It’s the law of engineering.
D. The products will sell for more money.
Find the number of atoms per square centimeter in silicon in the (100), (110), and (111) planes.
The number of atoms per square centimeter in silicon
in the (100) = [tex]6.78[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]
in the (110) = [tex]9.59[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]
in the (111) = [tex]7.83[/tex] × [tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]
What is silicon?With the symbol Si and atomic number 14, silicon is a chemical element. It is a tetravalent metalloid and semiconductor that is crystalline, rigid, and brittle with a blue-gray metallic sheen. With carbon above it and germanium, tin, lead, and flerovium below it on the periodic table, it belongs to group 14. It rarely reacts, if at all.
Jöns Jakob Berzelius was able to prepare and characterize it for the first time in 1823, but this was delayed due to its high chemical affinity for oxygen. Silicates are a class of anions made up of its oxides. The only metalloid and nonmetal with melting and boiling points higher than its respective values of 1414 °C and 3265 °C is boron.
Learn more about silicon
https://brainly.com/question/2053871
#SPJ4
1/ d. f blocks -... Consider the following elements C.Na, Mg, P, S. 17CL N Which of these can: a. Form hydrides by electrovalent binding b. Be used to catalyse a chemical reaction c. Be used in radioactive dating d. Form and acid anhydride e. Exhibit both metallic and non-metallic behavior
a)Elements that form hydrides by electrovalent binding are Sodium(Na), and Magnesium (Mg).
b)None of the elements is used to catalyze a chemical reaction and the elements that catalyze the reaction are platinum, cobalt, and iron.
c)Elements used in are radioactive dating [tex]C^{14}[/tex]
d)The element which forms acid anhydride is phosphorous (P).
e)The element that exhibits both metallic and non-metallic behavior is Metalloids.
The tabular display of chemical elements is the periodic table, Which contains 18 periods and 7 groups.
All the elements are configurable in the S, P, D, and F blocks.
S and D block elements mostly contain metals, and P- block contains non-metals and Metalloids.
To learn more about Periodic Table, use the following link
https://brainly.com/question/11155928
#SPJ9
what type of properties can be used to separate mixtures?
Explanation:
physical separation technique are based on physical properties of the substance
Answer:
Physical properties
Explanation:
Mixtures can be physically separated by using methods that use differences PHYSICAL PROPERTIES(boiling point, melting point, solubility in a given solvent,etc) to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.
hi there I have a question see my teacher wants me to record my self in how to solve a math problem but am so scared of many reasons one is that maybe no one is interested in what she wants me to do and am also scared that no one would like to be my friend so i would like some advice please
Answer:
just be yourself , if they are a good person that you want to be your friend they would support you and care about what you have to say.
Explanation:
The components of substances that are ______ separate when the substance is placed in water.
The components of substances that are ionically bonded separate when the substance is placed in water.
Water is an excellent solvent due to its polarity and its ability to for the hydrogen bonds. Because of this property, different substances dissolves and get separated in the water which are ionically bonded.
Ionically bonded compounds separates in the water because the molecules of water hydrate the ions. To separate an ionically bonded compound, the water molecules should be able to stabilize the ions. This stability results from breaking the ionic bonds. They do this by hydrating the ions.
Water is a polar molecule and has a permanent dipole moment. The oxygen atom has a partial negative charge and the hydrogen atoms have a partial positive charge. The water molecules attracts the positive and negative ions, when an ionic substance is placed in water.
The positive ions have several water molecules around them, and oxygen atoms are close to the positive ion. The negative ions have several water molecules around them, and hydrogen atoms are close to the negative ion.
The water molecules reduces attractions between the ions resulting in the weakening of ionic bond which results in the hydration of ions.
To learn more about water,
brainly.com/question/28465561
#SPJ1
Which of the following is NOT part of Dalton's Atomic Theory?
1. Atoms are composed of tiny subatomic particles.
2. Atoms that combine do so in simple, whole-number ratios.
3. All elements are composed of atoms.
4. Atoms of the same element are identical.
Nitrogen monoxide gas reacts with hydrogen gas to form ammonia gas and water vapor. True or false?.
Ammonia (NH3) and hydrogen peroxide (H2O2) can react to form Nitrogen (N2), water (H2O), nitric oxide (NO), and some amount hydrogen (H2) and oxygen (O2). Overall, the reactions involved are exothermic. Ammonium is a cation (NH4+), the conjugate weak acid from ammonia (NH3)
i hope this helps!
How many moles of N are in 0.171 g of N2O ?
Hi Steven!
So yet again, we find ourselves doing math when we thought the class was chemistry! For this we're going to do a standard conversion that we do a lot in GenChem, converting from grams to moles.
In this case, we're starting with 0.171g N2O. Let's go ahead and convert that to moles by using the molar mass, which is 44.013 g/mol.
.171 g N2O * (1 mol N2O / 44.013 g N2O) = 0.00389 mol N2O
So we got to moles of dinitrogen monoxide - now we need to know how many moles of nitrogen! We see that there's a subscript of 2 after the N, meaning there are two moles of N for every mol of N2O. You can think of it in terms of food -- for every 1 sandwich, there are two pieces of bread.
So let's multiply the number of moles of N2O by 2, to get moles of N!
.00389 mol N2O * ( 2 mol N / 1 mol N2O) = .00778 mol N!
Hope that helps :)
What can models show us specifically about the makeup of substances on the atomic level?
Models can show us specifically how atoms of a substance are arranged and connected on the atomic level.
What are atomic models?Atomic models is defined as a graphic representation of the structure of an atom which shows that it contains a nucleus made up of proton and neutrons and has an electron revolving round around it.
The first scientist that proposed the description of the inner structures of an atom is William Thomson in 1900.
Other scientist that carries out works on the atomic structure to produce a model include the following:
John DaltonJ.J. ThomsonErnest RutherfordNiels BohrErwin Schrödinger.Therefore, Models are important in makeup of substances on the atomic level because it can show us specifically how atoms of a substance are arranged and connected on the atomic level.
Learn more about atoms here:
https://brainly.com/question/1805828
#SPJ1
A square piece of paper has an edge measuring 7.06cm (using a centimeter ruler). How many significant figures should appear in the calculated surface area (A=S^2)?
The surface area of a square piece of paper has an edge measuring 7.06cm is 49.84 cm2
What is the surface area?The surface area of an object is the total area of the object that it occupies. It can be measured by adding all the sides of the object.
The surface area of a square is
side x side
Given the sides of the square is 7.06 cm.
This is a square, so all squares have the same size sides. So by putting the values in the equation, we can occupy the surface area of the square.
7.06 x 7.06 = 49.84
Therefore, the surface area of a square piece of paper is 49.84 cm2
To learn more about surface area, refer to the link:
https://brainly.com/question/2835293
#SPJ1
How many dollars are in 140 dimes? using dimensional analysis
Answer:
1 dollar
Explanation:
Magnesium (mg) has an hcp crystal structure, a c/a ratio of 1. 624, and a density of 1. 74 g/cm3. Compute the atomic radius for mg. Bryant
The atomic radius of Magnesium (mg) that has an hcp crystal structure, a c/a ratio of 1. 624, and a density of 1. 74 g/cm3 is1.6×〖10〗^(-8) cm.
The number of atoms that are present in each unit cell of a specific hexagonally closed-packed crystal with six atoms is known as hexagonal closed packing, or HPC. It is written as
ρ=(n×A)/(V_c×N_A )
Where
ρ is the density
n is the number of atoms
N_A is Avogadro’s constant (6.023×〖10〗^23 atoms/mol)
A is the molar mass of magnesium (24,305g/mol)
V_c is the volume of the crystal
V_c can be calculated using the expression below
V_c=(a^2 c×3√3)/2
a is the short crystal dimension (2R)
c is the long crystal dimension
1.624=c/a
c=1.624a
Putting the values in the above equation
V_c=(a^2×1.624a×3√3)/2
V_c=((2R)^2×1.624(2R)×3√3)/2
V_c=(4R^2×3.248R×3(1.73))/2
V_c=(67.428R^3)/2
V_c=33.71R^3 〖cm〗^3/(unit cell)
Substituting values into the density equation
ρ=(n×A)/(V_c×N_A )
1.74=(6×24.305)/(33.71R^3×6.023×〖10〗^23 )
Making R the subject of formula
R^3=145.83/(1.74×33.71×6.023×〖10〗^23 )
R^3=145.83/(3.53×〖10〗^25 )
R^3=4.127×〖10〗^(-24)
R=∛(4.127×〖10〗^(-24) )
R=1.6×〖10〗^(-8) cm
To learn more about atomic and crystalline structure. Click, https://brainly.com/question/14156701
#SPJ4
Does the pelvic bone support the intestines?
Yes, the pelvic bone support the intestines.
The pelvis, also known as the bony pelvis or the pelvic girdle, is a complex of bones that connects the trunk to the legs, supports and balances the trunk, and houses and supports the intestines, urinary bladder, and internal sex organs. It is also known as the "basin" or "bony pelvis" in human anatomy.
Major organs are located in the pelvic region, hidden by layers of muscles. The primary digestive organs, the intestines, are some of the most crucial. Bloating, constipation, or diarrhea, which are IBS symptoms, can cause pressure and pain in the pelvic area.
Therefore, yes the pelvic bone support the intestines.
Learn more about pelvis here;
https://brainly.com/question/9217183
#SPJ9