Answers
Answer:
I think 1, 4, and 5 are the answers to this question. I am not sure about 4 though.
Explanation:
You have to have a power source (1), you also have to have a way to get that power somewhere else (5), and the reason for 4 would be that the power has to come back through the power source to remain working.
Related Questions
Ores contain enough metal to make extraction of the metal ______
economical.
reversible.
carbon neutral.
Answers
Answer:
oxide
Explanation:
Which is the pathway of light as it travels through the eye?cornea → iris → retina → lenscornea → iris → lens → retinairis → cornea → lens → retinaretina → lens → iris → cornea
Answers
Answer:
Cornea >iris>lens >retina
Explanation:
Can't exactly figure out the answer but I think it should look like this
Answer: cornea → iris → lens → retina
Explanation: I have my ways ;>
which two body systems are primarily responsible for locomotion
Answers
Locomotion and movement are brought about by skeletal and muscular system of the body. It’s a coordinated event of the skeletal and muscular system brought by contraction and relaxation of muscles.
How does locomotion occur in our body?
Locomotion occurs with help of specialised muscles, muscular and non-muscular by nature.
It involves the interaction of muscles (tendons and ligaments) and skeletal joints and cartilage
Locomotion is a voluntary action which require involvement of the nervous system.
In muscles actin and myosin protein forms cross bridges, consuming ATP.
Hence, to bring about locomotion skeletal and are responsible.
Learn more about locomotion.
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What is the mass of 0. 513 mol Al2O3? Give your answer to the correct number of significant figures. (Molar mass of Al2O3 = 102. 0 g/mol) 0. 513 mol Al2O3 = g Al2O3.
Answers
The mass of a 0.513 mol of Al2O3 is 52.33g.
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by multiplying the molar mass of the substance by its number of moles. That is;
mass of Al2O3 = no. of moles of Al2O3 × molar mass of Al2O3
According to this question, there are 0.513 moles of Al2O3.
Mass of Al2O3 = 0.513 × 102
Mass of Al2O3 = 52.33g
Therefore, the mass of a 0.513 mol of Al2O3 is 52.33g.
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Pls some one help
1 mark question
Answers
Answer:
See below
Explanation:
Helium belongs to group VIII of the periodic table "Noble gases". It has only 1 electronic shell and that too contains 2 electrons according to the accommodation of the shell. Hence, it's electronic shell is complete. This is the reason, Helium is chemically unreactive.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH18071: How can you divide Pepper & Sand to make a solution?
Answers
Answer:
Mixture of sand, pepper powder and salt can be separated by dissolving the mixture into water. Sand and pepper powder is insoluble in water while salt is soluble. So they are separated by the filtration method.
which of the following pairs of molecules can form hydrogen bonds between them? group of answer choices ch3oh and nh3 hcl and hi ch4 and h2o fo2 and ch2o h2 and o2
Answers
Answer:
Hydrogen Bond is the force that exists when H is directly connected to F, O, or N. HCl and HI cannot form hydrogen bonds between them. CH3OH and NH3 can form hydrogen bonds between them. CH4 and H2O cannot form hydrogen bonds between them.
Explanation:
Zn + Fe2O3 --> Fe + ZnO
If excess Zn reacts with 1.34g Fe2O3 in the reaction above, how many grams of Fe would you expect to be produced
Answers
The mass of Fe produced from the reaction is 0.938 g.
We'll begin by calculating the mass of Fe2O3 that reacted and the mass of Fe produced from the balanced equation.
3Zn + Fe₂O₃ —> 2Fe + 3ZnO
Molar mass of Fe₂O₃ = (56×2) + (16×3) = 160 g/mol
Mass of Fe₂O₃ from the balanced equation = 1 × 160 = 160 g
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 2 × 56 = 112 g
From the balanced equation above,
160 g of Fe₂O₃ reacted to produce 112 g of Fe.
Finally, we shall determine the mass of the Fe produced by 1.34 g of Fe₂O₃
From the balanced equation above,
160 g of Fe₂O₃ reacted to produce 112 g of Fe
Therefore,
1.34 g of Fe₂O₃ will react to produce = (1.34 × 112)/160 = 0.938 g of Fe
Thus, 0.938 g of Fe was produced from the reaction.
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How did the Heisenberg uncertainty principle contribute to the idea that electrons occupy “clouds,” or “orbitals”?
Answers
How many protons, neutrons, and electrons are in an atom of beryllium with a mass number of 9?
A) 5 protons,5 electrons,4 neutrons
B) 4 protons,4 electrons,4 neutrons
C) 4 protons,4 electrons,9 neutrons
D) 4 protons,4 electrons,5 neutrons
Answers
Answer:
c / a
correct me if im wrong
Answer:
D) 4 protons, 4 electrons, 5 neutrons
what are Metals that are less reactive than alkali metals and alkaline-earth metals called
Answers
Answer:
The first ionization energies (I1) of the alkaline earth metals are not as low as the alkali metals. The alkaline earth metals are therefore less reactive than the alkali metals (Be and Mg are the least reactive of the alkaline earth metals). Several physical properties of these elements are compared in Table 7.7.
Calculate the empirical formula for acetaminophen(Tylenol)
Answers
Is a graph that starts at 25 and drops to 21, stays the same in temperature an endothermic reaction or an exothermic reaction?
Answers
Answer:
Explanation:
Endo and Exo thermic are defined by what changes take place in the environment of the reaction.
If the temperature goes up, the reaction is giving up heat. It is Exothermic.
If the temperature goes down, the reaction requires heat. It is Endothermic.
In this case, the temperature went down. The reaction is Endothermic.
1) Loudness and pitch are two important properties of a musical sound
a) If a musician plays a softer note, Which property has been changed, loudness or pitch?
b) If the musician makes the note lower , which property has been changed loudness or pitch
Answers
Answer:
a)loudness has been changed
b) pitch has been changed
A horticulturalist wants to produce geraniums with specific characteristics.
She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r(rr).
The horticulturalist crosses two geraniums from the F1 generation.
Look at the Punnett square to see this cross.
R r
R RR Rr
r Rr rr
Which ratio of red-to-white flowering plants would she expect to see in the phenotypes of the F2 generation?
all red
3 red : 1 white
1 red : 3 white
2 red : 2 white
Answers
Yo,
In Geranium plant life red vegetation is given by using the allele R this is dominant (so RR or Rr ) genotype will produce crimson plant life.
If we communicate approximately the connected punnet square which i took from the workout e book, you could see that there was a cross made among vegetation with heterozygous genotype for red flora.
P1: Rr X Rr
Gametes: R: r : R : r
F1: RR: Rr: Rr: rr
so there is three: 1 in F1 offspring for red to white plant life.
Now the query is set f2 technology, while we cross F1 generation suppose we do a move of Rr and rr from F1 generations allow us to see what takes place.
F1: Rr: rr
Gametes: R: r: r: R
F2 : Rr : rr: Rr: rr
Rr: purple flowers
rr: White flora:
So the ratio in F2 era might be 2 crimson : 2 white. Please see connected punnet squares (first one for query) and the second of F1 move for better know-how.
I'm hoping that this will benefit you, so from my assumption and study it'd be 2 crimson : 2 white, if this is indeed the one i'm thinking of since nothing else was provided, if not please correct me.
Answer: 2 red : 2 white
Explanation:
I know
metallic bonding in a group three metal
Answers
Answer: In a pure metal, there are atoms that are surrounded by free moving valence electrons in which they move from one part of metal to another part . There for we can conclude that pure metals are held together by things called metallic bonds and due to attraction between the mobile valence electrons and the positively charged metal ions.
Explanation:
The ability to be drawn into thin sheet is called malleability. The ability to be drawn into thin wires is called ductility. Therefore, the metallic bonds is between metals and metals.
What is metallic bonding?Metallic bonding is a type of chemical bonding that rises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
Covalent bonds are not strong bond. They can not have malleability and ductility. Ionic bonds are very strong bond. These are too not malleable or ductile. Lewis structure is used to show valence electron of every element in a molecule so, it has nothing to do with malleability and ductility. Due to metallic bonding, there is high melting and boiling point.
Therefore, the metallic bonds is between metals and metals.
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Name two elements that have the same properties as sodium (Na)
Answers
Answer: Any Alkali metal
Explanation:
T he cool thing about the periodic table is the way it is organized. You can find chemical with similar properties is just looking in the column they are in in to determine the answer. Since Na is in the first column, any of these answer can work:
Li, K, Rb, Cs, and Fr
Is metal defined as an element or as a compound or as a material?
Answers
Answer:
element
Explanation:
A metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons
Answer:
Metal is an element because it consist of type of atom and can't be divided into other substance .
There are 6. 022 Times. 1023 atoms of Hg in 1 mole of Hg. The number of atoms in 4. 5 moles of Hg can be found by multiplying 4. 5 by 6. 022 Times. 1023. Which is the number of atoms in 4. 5 moles of Hg, correctly written in scientific notation with the correct number of significant figures? 2. 7 Times. 1024 27 Times. 1023 2. 71 Times. 1024 27. 099 Times. 1023.
Answers
The number of atoms of Hg in 4.5 mole sample has been given as [tex]\rm 2.7099\;\times\;10^2^4[/tex]. Thus, option A is correct.
The number of atoms in a mole of sample has been given by Avogadro number. Avogadro number has been a constant and has been given the value of [tex]\rm 6.023\;\times\;10^2^3[/tex].
The number of atoms in a mole of sample has been given as:
[tex]\rm 1\;mole=\;6.022\;\times\;10^2^3[/tex]
The given sample has been consisted of 4.5 moles of Hg. Thus, the number of atoms in the sample has been given by:
[tex]\rm 1\;mole\;Hg=\;6.022\;\times\;10^2^3\;atoms\\4.5\;mol\;Hg=4.5\;\times\;6.022\;\times\;10^2^3\;atoms\\4.5\;mol\;Hg=27.099\;\times\;10^2^3\;atoms[/tex]
The scientific notation has been the short hand used for writing the numbers. The short hand for atoms in 4.5 moles of Hg has been [tex]\rm 2.7099\;\times\;10^2^4[/tex].
Thus, the number of atoms of Hg in 4.5 mole sample has been given as [tex]\rm 2.7099\;\times\;10^2^4[/tex]. Thus, option A is correct.
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determine the bond type (NP, Polar, Ionic)
Answers
Answer:
a. NP
b. NP
c. Polar
d. Ionic
e. Polar
Explanation:
The way I did it was using the electronegativity of the elements mentioned and subtracted the pairs. For non polar the difference is 0-0.4, for polar it’s 0.4-2.0, for ionic it’s >2.0. I included the chart I used to find the electonegativity for the elements below.
B: 2.04, P: 2.19, difference is 0.15, so NP
Be: 1.57, Si: 1.9, difference is 0.33, so NP
C: 2.55, Na: 0.93, difference is 1.62, so Polar
Li: 0.98, O: 3.44, difference is 2.46, so Ionic
Mg: 1.31, N: 3.04, difference is 1.73, so Polar
If you really want I can explain why electronegativity affects the types of bonds, just comment below
Answer:
Polar is the correct answer
Explanation:
#CarryOnLearning
The elements fluorine (F), chlorine (Cl), and Iodine are all part of the same ____________________ on the periodic table.
Question 9 options:
group
period
Answers
The elements fluorine (F), chlorine (CL),and Iodine are all parts of the same _group___ on the periodic table
CORRECT ANSWER WILL GET BRAINLIEST
Is the following nuclear equation balanced?
A. yes
B. no
Answers
Answer: B. no
Explanation:
What is formed if two or more atoms join together?
A. Compound
B. Electronegativity
C. Nucleus
D. Element
HELP
Answers
Answer:
compound
Explanation:
compound = A substance consisting of atoms or ions of two or more different elements in definite proportions joined by chemical bonds into a molecule.
write the correct name of the Fe(CIO3)3
Answers
Answer:
Iron(III) Chlorate Fe(ClO3)3 Molecular Weight
Explanation:
Answer: Iron(III) Chlorate should be it
formulas and nomenclature binary ionic compounds worksheet
Answers
To name the binary ionic compounds it is necessary to observe which is the metal and the non-metal that compose them.
This name is made as follows:
The name of the metal is shown.The name of the non-metal is presented in abbreviated form.Add the suffix "ide" at the end.An example of this can be seen in the binary ionic composite KCL that receives the name Potassium Chloride, since potassium is the metal and chlorine is the non-metal.
It is important to remember that binary ion compounds are electrically charged ionic molecules formed by a metal and not a non-metal.
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A student dissolves ethanol (C2H5OH) in distilled water. In another container, he dissolves CaCl2, in distilled water. Will either of the solutions conduct electricity? If so which one?
Plz Help!
Answers
Answer: The CaCl2 solution will conduct electricity.
Answer:
i think that the CaCl2 solution will conduct electricity
Explanation:
im not sure but if im wrong im sorry
discuss why people use the scientific method
Answers
Answer:
They use the scientific method to study different aspects of how people think and behave. They also use the scientific method because it is evidence-based, standardized and objective in conducting experiments.
Can someone give me an example of a Hypothesis?
Answers
Answer:
if I eat more vegetables,then I will lose weight faster.
what is the difference between hypertonic and hypotonic
Answers
Picture:
Meaning of hypertonic: (1): having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid. (2) of or in a state of abnormally high muscle tone.
Countercurrent Flow
Which filter regions have a concentration gradient between the blood and dialysate?
Check all that apply.
Answers
Answer: All options (I, II, III, IV, V)
Explanation: The answer is all options because they never reach equilibrium or intersect at a region as the both decrease at the same rate.
Answer: Picture shows the correct one
Explanation: