Answer:
1. cells are organized to form tissues
Explanation:
Cells are organized to form tissues is the statement best summarizes how part of the human body is ordered. Hence option 1 is correct.
What are cells?Cells are defined as the smallest component of living things, including biological tissues, that is capable of independent existence. The cell membrane, nucleus, and cytoplasm are the three major structural components of a cell. A cell's membrane, which encloses it and regulates what enters and leaves it, controls the flow of chemicals.
Organs are formed from tissues, which are composed of cells. Organ systems, such as the skeletal and muscular systems, are groups of organs. Cells, tissues, organs, and organ systems make up the several levels of organization in the human body. The human body, which is made up of countless billions of cells, is a marvel of structure and functionality.
Thus, cells are organized to form tissues is the statement best summarizes how part of the human body is ordered. Hence option 1 is correct.
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What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?
The physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table is the gaseous state at room temperature.
What are Physical properties?Physical properties may be defined as those properties of matter that do not involves any chemical manifestation or appearance within the element. These properties are measurable and state the alteration between momentary states. Some examples of physical properties are as follows:
Physical appearance or color.Hardness of elementDensity.Melting and boiling points.Electrical conductivity.The groups located in the rightmost column of the periodic table are known as the halogens and the noble gases. These elements are typically gaseous in phase at room temperature. Apart from this, halogens also have high electronegativities because these elements have seven electrons in their valence electrons.
Therefore, the gaseous state at room temperature is the physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table.
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Where do most of the visible electromagnetic waves on Earth come from?
Question 3 options:
x-rays
the sun
radio waves
florescent lights
Answer:
the sun
Explanation:
hope this helps. :) brainlyest would be nice as well but it's ok if not, thank you!
Answer: the sun
Explanation:
You have a container which has the capacity to hold 3 L water. If it already has 2.25 L water in it, how much more water in mL can you still add to fill it completely?
A 0.00215-g sample of polystyrene, a polymer composed of carbon and hydrogen, produced 0.00726 g of CO2 and 0.00148 g of H2O in a combustion analysis. What is the empirical formula for polystyrene?
Answer:
CH
Explanation:
Polystyrene is composed only by C and H.
We can calculate the number of C moles contained in the original sample mass (0.00215 g), using the produced mass of CO₂:
0.00726 g CO₂ ÷ 44 g/mol = 1.65x10⁻⁴ mol CO₂As 1.65x10⁻⁴ moles of CO₂ were produced, in the polystyrene sample there were 1.65x10⁻⁴ moles of C.
Now we calculate how many moles of H₂O were produced:
0.00148 g H₂O ÷ 18 g/mol = 8.22x10⁻⁵ mol H₂OThe number of H moles produced is double the amount of H₂O moles, so in the polystyrene sample there were 1.64x10⁻⁴ moles of H.
The number of C and H moles are the same, this means the empirical formula is CH.
Question 5
1 pts
What is the correct interpretation of an 85% yield for a given reaction?
85% of the anticipated amount of products were produced (relative to the theoretical yield)
O 15% of the reactants were used up
O 85% of the reactants were used up
15% of the anticipated amount of products were produced (relative to the theoretical yield)
Question 6
1 pts
True or false: The limiting reactant is the reactant that is used up after the reaction is complete.
O True
False
Answer: a) 85% of the reactants were used up
b) True
Explanation:
Percentage yield is defined as the ratio of actual yield to theoretical yield in terms of percentage. The actual yield is the amount of product obtained after the experiment and the theoretical yield is the amount of ideal product that should have been obtained.
Formula :
[tex]\text {percentage Yield}=\frac{\text {Actual Yield}}{\text {Theoretical Yield}}\times 100[/tex]
Thus 85 % yield means 85 % of the reactants were used up to give only 85% of products.
The limiting reactant is the reactant that limits the amount of product formed and hence is completely used up after the reaction is complete. Thus the given statement is True.
Diffusion is the movement of water between the cell membrane.
O True
O False
it is true good friend chip chip cherrio
Please help me thanks:)
Answer:
where it goes
Explanation:
Answer:
I didn't do the observation that the question said so I can't help sorry
How does black and coloured objects absorb light and convert it into heat?
Answer:
Light energy can be converted into heat energy. A black object absorbs all wavelengths of light and converts them into heat, so the object gets warm. A white object reflects all wavelengths of light, so the light is not converted into heat and the temperature of the object does not increase noticeably.
What is the first step in this
experiment?
Answer: Cut the card borad
Explanation:
What is the boiling point in °C of a 3.6 molal solution of calcium chloride in water?
Answer:
CaCl2--->Ca2+ + 2Cl_ so i=3
gA scientist is trying to discover information about an unknown metal in a compound. The formula for the compound is believed to be XBr3XBr3 where XX is the unknown metal. The scientist determined that a 4.700 g4.700 g sample of this compound contains 4.834×10−2 mol Br4.834×10−2 mol Br . Calculate the atomic mass of the unknown metal, XX .
Solution :
It is given that :
The formula of the compound = [tex]$XBr_3$[/tex]
And that 4.70 g of the sample contains [tex]$4.834 \times 10^{-2}$[/tex] mol of Br.
It means that :
1 mol of [tex]$XBr_3$[/tex] contains = 3 mol of Br
∴ 3 mol of [tex]$Br^-$[/tex] contain in 1 mol of [tex]$XBr_3$[/tex]
[tex]$4.834 \times 10^{-2}$[/tex] mol of [tex]$Br^-$[/tex] contains [tex]$1.576 \times 10^{-2}$[/tex] mol of [tex]$XBr_3$[/tex]
Thus the mol of [tex]$XBr_3$[/tex] = [tex]$1.576 \times 10^{-2}$[/tex] mol
The given mass is = 4.700 g
Therefore, the [tex]$\text{molar mass}$[/tex] of [tex]$XBr_3$[/tex] [tex]$=\frac{\text{mass}}{\text{mol}}$[/tex]
[tex]$=\frac{4.700 \ g}{1.576 \times 10^{-2} \ mol}$[/tex]
= 298.4 g/mol
So [tex]$\text{molar mass}$[/tex] of [tex]$XBr_3$[/tex] = [tex]$\text{molar mass}$[/tex] of X + 3 x [tex]$\text{molar mass}$[/tex] of Br
298.4 g/mol = [tex]$\text{molar mass}$[/tex] of X + 3 x 79.90 g/mol
298.4 g/mol = [tex]$\text{molar mass}$[/tex] of X + 239.7 g/mol
[tex]$\text{molar mass}$[/tex] of X = 58.71 g/mol (since 1 amu = 1 g/mol)
Therefore the atomic mass of the unknown metal = 58.71 g/mol
So the unknown meta is Nickel.
3x + 4y - 3z) - (2x - 6y + 7z)
x + 10y - 10z
x + 10y - 10z
x -10y - 10z
Answer: x + 10y - 10z is the answer
Explanation:
Pleaseeeee guysssss
Explain Which enthalpy diagram shows that the reaction above is an exothermic reaction that produces -550 kJ of heat? Why? The
Answer:
no answer of this question
How does the reactivity of nonmetals change as you move from left to right across the periodic table?
Answer:
Metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
Explanation:
I hope this helps :)
Answer:
Explanation:
Non metals increases in reactivity!
what is the definition of drugs
Answer:
Drugs is a type of medication
Another meaning for it is something that makes you feel drunk such as wine, alcohol and as such that causes addiction.
name this structure
Answer:
The fourth one- bromo trifluoro methane
Explanation:
Answer:
D
Explanation:
I believe the answer is the 4th option, bromo-trifluoro-methane
The equilibrium constant, Kc, is calculated using molar concentrations. For gaseous reactions another form of the equilibrium constant, Kp, is calculated from partial pressures instead of concentrations. These two equilibrium constants are related by the equation Kp=Kc(RT)Δn where R=0.08206 L⋅atm/(K⋅mol), T is the absolute temperature, and Δn is the change in the number of moles of gas (sum moles products - sum moles reactants). For example, consider the reaction N2(g)+3H2(g)⇌2NH3(g) for which Δn=2−(1+3)=−2. Part A For the reaction 2A(g)+3B(g)⇌C(g) Kc = 63.2 at a temperature of 81 ∘C . Calculate the value of Kp. Express your answer numerically.
Answer:
Kp = 1.41 x 10⁻⁶
Explanation:
We have the chemical equation:
2 A(g) + 3 B(g)⇌ C(g)
In which A and B are the reactants and C is the product. We calculate first the change in the number of moles of gas (Δn or dn):
dn= (sum moles products - sum moles reactants)
= (moles C - (moles A + moles B))
= (1 - (2+3))
= 1 - 5
= -4
We have also the following data:
Kc = 63.2
T= 81∘C + 273 = 354 K
R = 0.082 L.atm/K.mol (it is a constant)
Thus, we introduce the data in the mathematical expression for the relation between Kp and Kc:
[tex]Kc = (RT)^{dn}[/tex]= (0.082 L.atm/K.mol x 354 K)⁻⁴ = 1.41 x 10⁻⁶
why is weather forecasting important to the people
Answer:
Weather forecasting is important to the people since it helps determine future climate expectations .
A cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell
A. The cell will contract
B. The cell will expand slightly
C. The cell will burst
D. The cell will remain the same size
By the way I had to ask again because I f forgot to put the answer choices
Answer:
B
Explanation:
If not B then its d
Answer:
D
Explanation:
This would be an isotonic solution. If a cell is placed in a solution of salt with the same concentration of salt in the cell, nothing will happen.
Bobota
Level 1
Q2
What is the ability of a substance to
burn or ignite, causing fire or combustion?
DANGER
A. Chemical stability
B Reactivity
C Flammability
D. Conductivity
Answer:
chemical stability
Explanation:
g goodnight
Which of the following does not contain ionic bonds?
Sulfur dioxide
Aluminum oxide
Sodium oxide
Answer:
Sulfur dioxide
Explanation:
Sulfur dioxide does not contain ionic bonds.
Ionic bonds are formed by transfer of electrons while covalent bonds are formed by sharing of electrons.
Ionic bonds are also called electrovalent bonds. They are formed by transfer of electrons from one specie to another.
On the other hand covalent bonds are formed by sharing electrons. Covalent bonds are usually formed between two nonmetals while ionic bonds are usually formed between a metal and a nonmetal.
Sodium oxide is ionic because it is formed from sodium and oxygen (metal and nonmetal). The same applies to aluminium oxide.
The only compound formed from two nonmetals is Sulfur dioxide. It contains covalent bonds.
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How many grams of phosphorous is in the human skeleton if its average
weight is 11 kg and contains 58% of calcium phosphate (Ca3(PO4)2)?
A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3.30kg of water at 23.8°C. During the reaction 112.kJ of heat flows out of the bath and into the flask. Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18·J·g−1K−1. Round your answer to 3 significant digits. °C
Answer:
[tex]T_2= 31.9\°C[/tex]
Explanation:
Hello there!
In this case, it is possible to propose an energy balance in order to illustrate how the heat released by the reaction is absorbed by the water:
[tex]-Q_{rxn}=Q_{water}[/tex]
Thus, since the heat released by the reaction is -112 kJ (-112000 J), it is possible to define the hear absorbed by the water in terms of mass, specific heat and temperature change:
[tex]-(-112000J)=m_{water}C_{water}(T_2-T_1)[/tex]
In such a way, it is possible to define the final temperature as shown below:
[tex]T_2=23.8\°C+\frac{112000J}{3300g*4.18\frac{J}{g\°C} }\\\\T_2= 31.9\°C[/tex]
Best regards!
Which describes the proper way to use an eye wash station?
Keep your contact lenses in place.
Press on your eyelids firmly.
Rinse your eyes for fifteen minutes.
Call the paramedics for instructions.
Answer:
C
Explanation:
Rinsing your eyes thoroughly is the proper way to was your eyes out.
1. Take your contacts out as they can get stuck in your eye.
2. Don’t press on your eyes as you will just rub in the chemical substance more.
3. Can’t call the paramedics as you should rinse your eyes immediately.
Why do materials interact to light differently?
Answer:
Refracted (refraction) – the bending of transmitted light as it travels across the boundary of one material into another material in which it's speed is different. Unlike diffraction, this change in direction of light occurs because light is changing its speed in the different substances in it traveling in.
Explanation:
Hope it helps
species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. which pf the following best explains this difference
A: Bacteria reproduce more rapidly, allowing species to evolve more quickly
B:Bacterial populations are more isolated, permitting increases in genetic variability
C:certain bacteria grow more steadily over time, giving an evolutionary advantage over mammals
D: Individual bacteria have the same genes, providing opportunities for increased biodiversity in one population.
Answer:A
Explanation:
Species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. Bacteria reproduce more rapidly, allowing species to evolve more quickly best explains this difference. Therefore, option A is correct.
What allows bacteria to evolve so quickly ?Bacterial species evolve quickly because of their large populations, which provide numerous opportunities for mutations, and because they readily exchange genetic information, even between species. Some of this genetic diversity influences drug sensitivity or resistance, providing material for Darwinian selection.
Bacteria are among the world's fastest reproducing organisms, doubling every 4 to 20 minutes. Some pathogenic strains of E. coli grow quickly.
Bacterial populations evolve antibiotic resistance so quickly due to their fast generation times, large population sizes, and unique gene acquisition methods. These are some of the reasons bacteria have been so successful in evolution.
Thus, option A is correct.
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Four stereoisomers exist for 4-hexen-3-ol. Draw the structure of the isomer that has the Z configuration around the double bond and the R configuration at the chiral center.
Answer:
Following are the solution to the given question:
Explanation:
Please find the complete question and its graph file in the attachment file.
The isomer having Z specification from around dual connector as well as the chiral center S structure is:
[tex](3S,4Z)-4-Hexen-3-ol[/tex]
An 'H' atom has been at the level of 3rd carbon, and we need to change its configuration, through 'R' to 'S' by CIP notation (under contrast to -OH group).
Answer:
The double bond can have either the E or the Z configuration.
Each of these stereoisomers can exist in either the R or the S configuration at the chiral center for a total of four possible stereoisomers.
In the combustion of gasoline, shown below, if 15.0 g of CO2 is produced, what volume of oxygen gas would be consumed? Assume STP. You must show your work.
Answer:
Depends on what you are burning. If it is carbon (ie coal), the answer is 15 (one liter CO2 for each liter of oxygen. Simply add a C onto an O2.) If you are burning octane, (C8H18), for each carbon you would you would have 1 1/8 H2Os and one CO2. To round off slightly (as I do not feel like getting out my calculator) we would have about twice as much oxygen tied up in CO2 as H20 (as there is only one O in H2O vs 2 in CO2). Therefore, in this case, it is ~10 l of CO2 for 15 l of oxygen. Propane will be different again, as will natural gas, etc.
Explanation:
Which of these items is made up of one or more molecules?
Gold
Hydrogen
Salt
Neon
The item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
What is a Molecule?A molecule may be defined as a group of one or more atoms that are held together by numerous chemical bonds. It is the smallest particle of a substance that has all sorts of physical and chemical properties of that substance.
Among the given options, gold and neon are the elements, while salt is a compound. Hydrogen is a gas of diatomic molecules bearing the formula H2. It is colorless, tasteless, odorless, non-toxic, and highly combustible. Hydrogen in its molecular form is more common.
A hydrogen molecule is one of the simplest possible molecules which significantly consists of two protons and two electrons. These protons and electrons are remarkably held together by electrostatic forces.
Therefore, the item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
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When a solid turns into a liquid what is happening to the relationship between the forces?