Every closed circuit has an electric current, voltage, and ___________..
Fill in the blank
When crossing parents with genotypes Rr and rr what will be the percentage of the genotypes of the offspring
Answer:
Explanation:
Heterozygous cross with a hom.ozygous recessive yields the following results
50% rr (hom.ogyzous recessive)
50% Rr (heterozygous dominant)
A heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).
What is Parental crossing?Crossing over is a type of cellular process which occurs during the process of meiosis when chromosomes of the same type line up. When these two chromosomes – one from the mother and one from the father – line up, parts of the chromosome can be switched. Two chromosomes contain the same genes, but the genes may have different forms.
The organisms in this initial hybridization are called the parental or P generation. The progeny of the Rr x rr cross are called F1 generation which will have a heterozygous cross with the homozygous recessive giving the following results: 50% Rr (homozygous recessive) and 50% rr (heterozygous dominant)
A cross between two of the offspring in F1 generation would produce a new set of progeny called second filial generation (or F2 generation).
Thus, a heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).
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what is the method use to separate sand and water
Sand and water can be separated by any of the following methods:
1. Sedimentation and decantation: This method involves the mixture being kept undisturbed for some time. After some time, sand being heavier and insoluble in water, settles down at the bottom of container. Now, water is poured into another container to separate it from sand.
2. Filtration: This method involves the mixture being passed through a filter paper (a filter with very fine pores). Sand particles being larger in size are retained by the filter paper and get separated from water.
I hope this helps! :D
Warning eating fish caught in this lake may be dangerous to your health
Answer: it’s C hope that helps
Answer:
hmm I don't think its D because that doesn't have anything to do with your heath I don't think it's C either, probably not global warming so I think its A
Explanation:
I hope that helped :)
sorry if I'm wrong
b) determine the number of moles of carbon dioxide
produced.
Explanation:
The mass of one mole of a substance, expressed in gms, is equal to the mean molecular mass of the substance. The molecular mass of CO2= 12+2x16= 44 so the mass if a mole of CO2 is approximately 44 grams.
Hope it helps!!!...
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how many moles of ions is in Magnesium chloride?
Let's say that you were given the following
problem:
A gas that exerts a pressure of 151 mm Hg in a
container with a volume of L will exert a
pressure of 166 mm Hg when transferred to a
container with a volume of 0.532 L.
Let's begin by assigning our variables. Let's say
that P1 = 151 mm Hg. What is V2?
Answer:
V2~0.4839M
Explanation:
We're going to use Boyles law to answer the question.
Boyle's law:
P1V1=P2V2
P1=151mmHg
P2=166mmHg
V1=0.532L
V2=?
V2=(P1 x V1)/P2
V2=(151 x 0.532)/166
V2~0.4839M
Hope it helps:)
Answer: C. unknown
Explanation: got it right on acellus
Which area of science is considered the central science?
chemistry
biology
physics
environmental science
Answer:
Chemistry
Explanation:
Chemistry is considered the central science.
Which area of science is considered the central science?Chemistry is sometimes called "the central science" because it's so important to other fields of science, like biology, geology, astronomy, physics, medicine, engineering, materials science, and many other areas of study.
Which branch of science is the most important?All the branches of science possess their own level of importance, However, physics deals with the fundamental workings of material reality which are central to all other branches of science.
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1. Define an element. Give at least five examples.
an element is a substance that cannot be split into simpler substances by a chemical means . for example - hydrogen, oxygen, nitrogen, carbon, iron, aluminium, copper, silver and gold some example of elements.
How many grams of oxygen are required to burn 13.50 grams of acetylene?
2Al(s) + 3Cu^3 + (aq) -> 2Al^3 + 3Cu(s) which reactant is reduced and which is oxidicided.
Pls help I have a test in 1h
Answer:
Al is oxidized
Cu is reduced
Answer:
here
Cu is reduced
and
Al is oxidised
hope this will help you
have a nice day
Why are polar gases, such as H2O and NH3, more likely to deviate from the ideal gas behaviors described by the kinetic molecular theory? (3 points)
Question 4 options:
1)
The density of these gases is high, increasing the number of collisions and reducing their elasticity.
2)
The fluidity of these gases is high, resulting in a higher average kinetic energy.
3)
The particles have a significant volume, reducing the space between the moving particles.
4)
The particles have high intermolecular forces, reducing the elasticity of their collisions.
Answer:
HCl, H2O, and NH3 are the most polar of these, so they won't behave ideally because the particles have greater attractive forces between them. How does the kinetic-molecular theory explain the pressure exerted by gases? ... Particles are always in motion and when they are contained, they are elastic collisions.
The particles have high intermolecular forces, reducing the elasticity of their collisions.
What are polar gases?Polar molecules are formed when a high electronegative atom combined with a less electronegative atom.
Ammonia, sulfur dioxide, hydrogen sulfide, are polar gases.
The non-polar gases are inert gas or noble gas.
The polar compounds are asymmetrically array.
Thus, the correct option is 4, The particles have high intermolecular forces, reducing the elasticity of their collisions.
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Someone help pleaseeee I will give brainliest
Answer:
2-Methylhexane
Because Ethylexane does not have hydrogen molecules neither,also it only has 2 options but they're just repeated
NaOH+ N2O3---> ___+____
Answer:
NaOH+ N2O3---> NaNO2 + H2O
Which radiation detection device is the best to use for measuring the presence of radiation in large moving objects where constant monitoring is impossible?
film badge
Geiger counter
cloud chamber
scintillation counter
Answer:
A film badge
Explanation:
The film badge dosimeter or film badge is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation. It of a photographic film and a holder. This film badge is used to determine or measure and record the radiation exposure as a result of radiations, x-rays, gamma rays and also beta particles.
All users of medical x-ray equipment (C-arms, fluoro units, therapy units) must wear badges. Those using larger quantities of radioactive materials will also be provided badges. The correct option is A.
What is film badge?Ionising radiation exposure is measured using photographic film for personnel monitoring purposes. A filter that protects part of the film from particular types of radiation may also be present in the film badge, which may contain two or three films with varying sensitivity levels.
A particular kind of passive dosimeter is the film badge. It comprises of a photographic emulsion film in a light-tight wrapping (kept in a holder) that changes optical density in response to ionising radiation. The holder, which also includes several filters (for calculating tissue equivalent amounts), is typically worn on the body's trunk.
So film badge is the device used most commonly today for monitoring the radiation exposure of personnel.
Thus the correct option is A.
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What are the columns on the periodic table called?
(2.5 Points)
Answer:
A group is a column of elements in the periodic table of the chemical elements.
So, the columns on the periodic table are called groups.
PLEASE HELP ASAP DUE SOON WILL MARK BRAINLIEST
True or false intrusive igneous rock will never be found on Earth's surface?
Answer:
false
Explanation:
Answer:
false
Explanation:
lava is on the earth
I NEED HELP WITH CHEM PLEASE HAVE A DECENT ANSWER
Answer:
x is HCl because pH = 2 (acid and it reacted with Mg plus it turned litmus paper to red)
y is NaOH because pH = 10 (base and turned litmus paper to blue)
z is NaCl because pH = 7 (neutral and no reaction to litmus paper and Mg)
Chemical A breaks down into chemical B. At t=0, [A] = 0.100 M. At t=10.0 s, [A] = 0.075 M. What is the average reaction rate?
Answer:
a0.0075 mi i think so ok but average is need to add and divide
List and describe two differences between pure substances and mixtures. Check all that apply. Check all that apply. The composition of a pure substance depends on the source, but the composition of a mixture doesn't depend on the source. The composition of a pure substance is always the same, regardless of the source, but the composition of a mixture can vary. The state of a pure substance is always the same, but the state of a mixture can vary. Mixtures can be separated into their components only by chemical changes; some pure substances can be separated into components by physical change. Mixtures can be separated into their components by physical changes; some pure substances can be separated into components by chemical change.
Answer:
The composition of a pure substance is always the same, regardless of the source, but the composition of a mixture can vary.
Mixtures can be separated into their components by physical changes; some pure substances can be separated into components by chemical change.
Explanation:
A chemically pure substance has a well defined and constant composition. The composition of a chemically pure substance remains the same irrespective of its source. Also, the components of a chemically pure substance may be separated by chemical changes.
Mixtures have a variable composition depending on their respective sources. The composition of a mixture varies with the source of the mixture and mixtures are separated by physical processes.
Which of the following represents an endothermic reaction?
Question 12 options:
A + B --> C + D + Heat
heat pack getting hot
Heat + A + B --> C + D
burning wood
Answer:
ANSWERThe second one would be one of the application of an endothermic reaction as because endothermic reaction always have the heat in the process to mix the reactants and form the products as here in a burning wood when the wood is supplied with heat then it change into products as ashes and smoke fumes So here due to the heat is involved to form the products thats the reaction is endothermic reaction.
Hope it helps
The ____ allows you to compare the elements and understand their properties
Answer:
Periodic Table
hope this helps
have a good day :)
Explanation:
The periodic table allows you to compare the elements and understand their properties.
What is periodic table?Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
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The reaction is run at two temperatures where temperature 1 is lower than temperature 2. Which relationship is correct for either rate constant (k1 or k2) or activation energy (Ea,1 and Ea,2)
Answer:
The answer is "[tex]K_1 < K_2[/tex]"
Explanation:
In the given question, the value of the [tex]K=Ae^{-\frac{Ea}{RT}}[/tex] and the [tex]T_1 <T_2[/tex]is the rate value which is the constant that is [tex]K_2>K_1[/tex]. As per the temperature value when its increase rate is constantly increasing. [tex]E_a[/tex] is activation energy it is not dependent on the temperature that why the answer is [tex]K_1 < K_2[/tex].
determine the number of significant figures in 478 cm
Answer:
There are 3 significant figures on this one.
Use the reaction shown l to answer these questions.
2CO(g) + 2NO) → N2(g) + 2CO2(g)
If 42.7 g of CO is reacted completely at STP, what
volume of N2 gas will be produced?
Answer:
16.8dm3
Explanation:
2 moles of CO gives 1 mole of N2
2 moles of CO= 2* 28= 56g
1 mole of N2 = 1* 22.4dm
56g of CO gives 22.4dm3 of N2
42.7 of CO will give> (42.7*22.4)/56
=16.8dm3
The volume of [tex]N_{2}[/tex] gas will be produced 16.8 [tex]dm^{3}[/tex].
What is volumeVolume is sometimes referred to as capacity. The volume of a cylindrical jar, for example, is used to determine how much water it can hold.
Calculation of volume is shown below:
The given reaction is: 2CO(g) + 2NO) → N2(g) + 2CO2(g)
It can be seen that 2 moles of CO give 1 mole of [tex]N_{2}[/tex].
So, 2 moles of CO = 2×28 = 56 g.
Hence, 1 mole of [tex]N_{2}[/tex] = 1×22.4 = 22.4 [tex]dm^{3}[/tex].
56 g of CO will give 22.4 [tex]dm^{3}[/tex] of nitrogen atom.
42.7 of CO will give = (42.7×22.4) / 56
= 16.8 [tex]dm^{3}[/tex].
Therefore, the volume of nitrogen will be 16.8 [tex]dm^{3}[/tex].
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Which force is most responsible for binding together an atom’s protons and neutrons?
electrostatic
gravitational
nuclear
magnetic
Answer:
Hello There!!
Explanation:
I believe the answer is nuclear.
hope this helps,have a great day!!
~Pinky~
Answer:
C) Nuclear
Explanation:
Trust the process
Edge 2021
What is the Molarity of a solution made by taking 2.5 moles and dissolving it into enough water to make 5.0 Liters of solution?
Answer:
.5 M
Explanation:
molarity = moles / liters
2.5/5 = .5 M
O rendimento de determinada máquina térmica é de 5%. Sabendo que essa máquina obedece as leis da termodinâmica e que ela recebe da fonte quente 5000J de energia, então o trabalho realizado por essa máquina a cada ciclo é de:
Answer:
Trabalho realizado por máquina térmica = 250 J
Explanation:
Dado
Eficiência da máquina térmica = 5% = 0,05
A eficiência é igual à proporção do trabalho realizado pela máquina térmica para o calor fornecido a ela
Por isso,
0,05 = Trabalho realizado por máquina térmica / 5000 J
Trabalho realizado por máquina térmica = 5000 J * 0,05 = 250 J
Hello, anyone? help me