Answer:
Joints
Explanation:
Without joints we would not be able to bend our arms or legs. Hence option C is correct.
What is bending?Bending is defined as the behavior of a thin structural element under an external load that is applied perpendicular to the element's longitudinal axis. Plants and their parts are thought to bend as a result of a flexure process in which the curvature of the plant part changes. The plant organs' collenchyma gives them flexibility and elasticity, preventing them from breaking when bent.
The force required to bend, straighten, and support joints is applied by muscles to the bones. Muscles act in pairs of flexors and extensors because they may pull on bones but not put them back into place. The extensor muscle relaxes and stretches as the flexor muscle contracts to bend the joint.
Thus, without joints we would not be able to bend our arms or legs. Hence option C is correct.
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Does anyone know the answer I need help
Answer:
Can you put other picture because the picture is blurry? please
Explanation:
5) A scientist adds 1.2 liters of water to a 5.0 liter solution, causing the molarity to become 0.4 M. What was the molarity of the initial solution before the dilution?
Explanation:
i hope i helped you in this problem
According to the molar concentration, the molarity of the initial solution before the dilution is 0.096 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution of values in formula M₁V₁=M₂V₂ gives M₁= 0.4×1.2/5=0.096 M.
Thus, the molarity of the initial solution before the dilution is 0.096 M.
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3. How many particles are present in 13.4 moles of carbon dioxide?
8.07. 1024 particles
04.49. 1022 particles
6.02. 1024 particles
6.02. 1023 particles
Answer:
[tex]\boxed {\boxed {\sf 8.07 *10^{24} \ particles}}[/tex]
Explanation:
To convert from moles to representative particles, Avogadro's number: 6.02*10²³ is used. This number tells us the amount of particles in 1 mole of a substance. We can use it as a ratio.
[tex]\frac {6.02*10^{23} \ particles}{1 \ mol \ CO_2}}[/tex]
Multiply by the given number of moles.
[tex]13.4 \ mol \ CO_2 *\frac {6.02*10^{23} \ particles}{1 \ mol \ CO_2}}[/tex]
The moles of carbon dioxide will cancel out.
[tex]13.4 *\frac {6.02*10^{23} \ particles}{1}}[/tex]
The denominator of 1 can be ignored and this becomes a simple multiplication problem.
[tex]13.4 * {6.02*10^{23} \ particles[/tex]
[tex]8.0668*10^{24} \ particles[/tex]
The original number of moles has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 6 in the thousandth place tells us round the 6 to a 7.
[tex]8.07 *10^{24} \ particles[/tex]
13.4 moles of carbon dioxide has approximately 8.07*10²⁴ particles.
Which best describes why animals need the energy in food?
A for growth and body repair
B for transpiration and growth
C for body repair and photosynthesis
D for cell reproduction and transpiration
Answer:
A for growth and body repair
Explanation:
B, C, and D don't have anything to do with animals.
Janet runs 6.4 miles in one hour. Is it speed or velocity or acceleration
Answer:
acceleration
Explanation:
2. Write the symbol proposed by Dalton for silver, sulphur. oxygen and gold.
Answer:
check the pdf hope it helps :)
Explanation:
Hiiii :D !! I need help please :>
Answer:
7 false
8 True
9a
:)
Explanation:
The atomic radius _________________ down a group. Explain why
To be considered a true mineral,
what state of matter must be
present?
what is meant by chemical combination? what are the laws of chemical combination?
Answer:
In simple terms, this law states that matter can neither be created nor destroyed. In other words, the total mass, that is, the sum of the mass of reacting mixture and the products formed remains constant.
Explanation:
please give me brain list and follow
what is the molar mass of aspartic acid
The molar mass of aspartic acid is 133.05g/mol.
What is molar mass?The molar mass is the mass per unit amount of substance of a given chemical entity. It is denoted by a symbol M. The SI unit of molar mass is kg/mol.
What is aspartic acid?Aspartic acid is one of the building-block of amino acids which is responsible for synthesizing proteins and regulating hormones in the human body.
The chemical formula of aspartic acid is C4H7NO4.
Atomic mass of C = 12.011u, H = 1.007u, N = 14.006u, O = 16u
Molar mass of C4H7NO4 = 4(12.011)+7(1)+14.006+4(16)
= 48.044+7+14.006+64
= 133.05g/mol
Hence, the molar mass of aspartic acid is 133.05g/mol.
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Give the IUPAC name for the following alkanes and cycloalkanes
Answer:
1.3-bromo,2-chloro,4-floro hexane
3.bromocyclo pentane
An electric range burner weighing 699.0 grams is turned off after reaching a temperature of 482.0°C, and is allowed to cool down to 22.7°C.
Calculate the specific heat of the burner if all the heat evolved from the burner is used to heat 560.0 grams of water from 22.7°C to 80.3°C.
J/g°C
Answer:
0.42 J/gºC
Explanation:
We'll begin by calculating the heat energy used to heat up the water. This can be obtained as follow:
Mass (M) of water = 560 g
Initial temperature (T₁) = 22.7 °C
Final temperature (T₂) = 80.3 °C.
Specific heat capacity (C) of water = 4.18 J/gºC
Heat (Q) absorbed =?
Q = MC(T₂ – T₁)
Q = 560 × 4.18 (80.3 – 22.7)
Q = 2340.8 × 57.6
Q = 134830.08 J
Finally, we shall determine the specific heat capacity of the burner. This can be obtained as follow:
Mass (M) of burner = 699 g
Initial temperature (T₁) = 482.0°C
Final temperature (T₂) = 22.7 °C
Heat (Q) evolved = – 134830.08 J
Specific heat capacity (C) of the burner =?
Q = MC(T₂ – T₁)
–134830.08 = 699 × C (22.7 – 482.0)
–134830.08 = 699 × C × –459.3
–134830.08 = –321050.7 × C
Divide both side by –321050.7
C = –134830.08 / –321050.7
C = 0.42 J/gºC
Therefore, the specific heat capacity of the burner is 0.42 J/gºC
What layer of the Sun is the location for nuclear fusion?
if the amounts of greenhouse gases such as carbon dioxide and methane continue to increase in the atmosphere, what will happen to the average temperature of Earth?
If greenhouse gases in the atmosphere continues to increase, then the
average temperature of Earth will increase too.
Greenhouse gases such as carbon dioxide and methane deplete the ozone
layer which shields the earth from radiations from the Sun. An increase in
these gases will therefore allow for more radiations to get to the earth.
This therefore brings about an increase in the average temperature of the
earth.
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What is the number of moles in 546 g strontium nitrite?
A. 0.388 mol
B. 2.58 mol
C. 329 mol
D. 3.04 mol
A rigid container of O 2 has a pressure of 340 kPa at a temperature of 713 K. What is the pressure at 273°C ?
Answer:
260 kPa
Explanation:
To answer this problem we can use Gay-Lussac's law, which states that at a constant volume (such as is the case with a rigid container):
P₁T₂=P₂T₁Where in this case:
P₁ = 340 kPaT₂ = 273 °C ⇒ 273 + 273.16 = 546 KP₂ = ?T₁ = 713 KWe input the data:
340 kPa * 546 K = P₂ * 713 KAnd solve for P₂:
P₂ = 260 kPaHow many moles of titanium are in a sample containing 2.8 x 10^24 atoms?
1) 1.69 x 10^48
2) 4.65 x 10^43
3) 4.65
4) 0.0465
5) 48
Answer:
4.65 moles
Explanation:
To calculate this, we can use Avogradro's Number: 6.022*10^23
[tex]2.8*10^2^4*\frac{1mole}{6.022*10^2^3} =4.65mol[/tex]
So, there are 4.65 moles in 2.8*10^24 atoms of Ti
an unknown sample with a mass of 50.0 grams changes from an initial temperature of 22.5°C to a final temperature of 32.4°C. It is known that the sample absorbed 444 J and f heat l. Bases on this information, what substance in the table is most likely the identity of this sample?
Answer:
Aluminum
Explanation:
how many hydrogen molecules are there in 1 ton of hydrogen?
Considering the definition of mass molar and Avogadro's Number, there are 3.0115×10²⁹ molecules in 1 ton of hydrogen.
First, the molar mass of hydrogen H₂, that is, the amount of mass that a substance contains in one mole, is 2 g/mole.
In this case, being 1 ton = 1,000,000 grams, the number of moles that 1 ton of hydrogen contains is calculated as:
[tex]1,000,000 gramsx\frac{1 mole}{2 grams} = 500,000 moles[/tex]
On the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.
Then, the number of molecules that 500,000 moles of hydrogen contains is calculated as:
[tex]500,000 molesx\frac{6.023x10^{23} molecules }{1 mole}[/tex]= 3.0115×10²⁹ molecules
Finally, there are 3.0115×10²⁹ molecules in 1 ton of hydrogen.
Learn more about:
mass molar: https://brainly.com/question/12695086?referrer=searchResultsAvogadro's Number: brainly.com/question/11907018?referrer=searchResults brainly.com/question/1445383?referrer=searchResults brainly.com/question/1528951?referrer=searchResultsWhich of the following statements are true?
Question 1 options:
According to collision theory, any factor that can cause more collisions will increase the rate of reactions.
According to collision theory, factors can cause more collisions, but will not change the rate of reactions.
According to collision theory, factors that can cause more collisions have less energies than the activation energy, thus will decrease the rate of reaction.
According to the collision theory, no factors can influence reaction rates.
Answer:
c
Explanation:
factor can cause more collision and increase the rate of reaction
Help guys
Please
Please help me if u know
Gallium (Ga, 69.723 g/mol) is a metalloid obtained from its salts during the smelting of ores of other elements, like Zinc. has broad applicability in the electronics industry. It is also used as a safe replacement for mercury in thermometers as it melts at 29.8 °C and has a heat of fusion of 5.59 kJ/mol. What is the entropy change of 22 g of gallium in J/K as it melts when placed on a surface at 29.8°C?
Answer:
4.255 J/ K
Explanation:
Given data :
mass of Gallium = 16 gm
molar mass = 69.723 g/mol
hence no of moles = 16 / 69.723 = 0.23 moles --------- ( 1 )
Δh ( heat fusion ) = 5.59 KJ/mol
Temperature = 29.8°C = 302.8 k
Determine the entropy change of gallium
Δs ( entropy change ) = heat fusion / temperature
= ( 5.59 * 1000) J/mol / 302.8 = 18.46 J/k*mol
Hence entropy change of gallium
= Δs * no of Gallium moles
= 18.46 * 0.23 = 4.255 J/ k
I hope this is right haha
Write the name for the acid H2 SO4 when it is dissolved in water.
Answer: Sulfuric acid
Explanation: hope this help! :)
1.25 mol naoh (s) dissolves in water
How many grams of solid NaOH are needed to prepare 200. mL of a 5.00% by
volume NaOH solution
A) 8
B) 10
C) 9
D) 7
Answer:
10
Explanation:
Each 100 ml should have 5 solid naom to have 5%,
For 200 ml: 200 *5%=10
The grams of Solid NaOH needed is : ( B ) 10 grams
Volume of solution = 200 mL
Percentage of solid NaOH in solution = 5.0%
Therefore the grams of solid NaOH required to prepare a 200mL solution that contains 5.0% solid will be :
5% * 200 mL
= 10 grams
Hence we can conclude that the grams of solid NaOH needed is 10 grams
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what is the purpose of time on analyzing fluid viscosity
Answer:
Gathering viscosity data on a material gives manufacturers the ability to predict how the material will behave in the real world.
Example:
If toothpaste does not have the correct viscosity, it can either be too difficult to pump out from the tube, or pump out too much.
The table shows the rate of reaction for two unknown time intervals during a chemical change.
Reaction Rates
Time Intervals (s) Rate (M/s)
T1 1.8 x 10−6
T2 1.0 x 10−6
Which of the following is true for the two time intervals? (5 points)
Select one:
a. T1 is longer than T2, and the concentration of reactants at the end of T1 is lower than that of T2.
b. T1 is longer than T2, and the concentration of products at the end of T1 is lower than that of T2.
c. T1 is shorter than T2, and the concentration of reactants at the end of T1 is higher than that of T2.
d. T1 is shorter than T2, and the concentration of products at the end T1 is higher than that of T2.
Answer:
i think a is the right answer
Which is the correct formula for finding the frequency of an electromagnetic wave? f = c – lambda f = StartFraction lambda over c EndFraction. f = lambda + c f = StartFraction c over lambda EndFraction.
Answer: It's D
Explanation:
Answer:
the answers d if you give brainliest give it to the other person im not worthy of it
Explanation:
How many moles of caffeine are in 130 mg of caffeine coffee?
Answer:
0.00067mols
Explanation:
firs convert 130mg to grams which is 0.13g, then find the molar mass of caffeine which is 194.19g/mol.
0.13g/194.19gmol=0.0067mols