what are the steps to measure the density of a solid?
Answer:
Look below
Explanation:
The formula for density is:
[tex]Density=\frac{mass}{volume}[/tex]
Therefore in order to find the density of a solid, you must find the mass and the volume first.
To find the mass, you can use a scale.
To find the volume, you can use the water displacement method. For example, if you fill the water of a graduated cylinder to 10 mL, and then you put a rock inside, and it rises to 15 mL, then the volume (of the rock) is 15mL-10mL=5mL.
If 15.00 mL of 0.0100 M Ca(IO3)2 solution are mixed with 0.500 g KI, what is the theoretical yield (in grams) of I2?
The theoretical yield of I2 in the reaction would be 0.23 g
Theoretical yieldThis refers to the stoichiometric yield of a reaction.
From the equation of the reaction:
Ca(IO3)2 + 10 KI + 12 HCl → 6 I2 + CaCl2 + 10 KCl + 6 H2O
The mole ratio of Ca(IO3)2 and I2 is 1: 6
Mole of 15.00 mL, 0.0100 M Ca(IO3)2 = 15/1000 x 0.0100
= 0.00015 mole
Equivalent mole of I2 = 0.00015 x 6
= 0.009 mole
mass of 0.0009 I2 = 0.0009 x 253.809
= 0.23 g
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Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
Mg + HC1
→
H
2
+
MgC
1
2
Mg + HC1 → H 2 + MgC 1 2
H
2
O
+
C
O
2
→
H
2
C
O
3
H 2 O + C O 2 → H 2 C O 3
KC
1
O
3
→
KC1 +
O
2
KC 1 O 3 → KC1 + O 2
H
2
+
O
2
→
H
2
O
H 2 + O 2 → H 2 O
if I'm not mistaking it would be the second option
calculate it. (its for my mom birthday gift trust me)
Answer:
25%
Explanation:
Your formula is wrong the bottom part is mass of it all so add solution to solute.
A manual contains instructions for how to build a variety of structures using a set of interlocking bricks. If this scenario is used as a model for genetic information, which statement is correct?(1 point)
Each set of instructions is a protein.
Each set of instructions is a protein.
The manual is a chromosome.
The manual is a chromosome.
The interlocking bricks are the chromosomes.
The interlocking bricks are the chromosomes.
Each structure is a gene.
Each structure is a gene.
If this scenario is used as a model for genetic information, then the statement 'the manual is a chromosome' is correct. A chromosome contains linear arrangements of genes.
What is a chromosome?A chromosome can be considered as a long nucleotide sequence that contains linear arrangements of genes.
In a chromosome, each DNA strand contains a nucleotide sequence that may encode proteins (i.e., different genes).
A chromosome can then be considered as manual containing instructions (genes) for how to build a variety of structures using a set of interlocking bricks (nucleotides).
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Answer:
the manual is a chromosome
Explanation:
A recipe for candy requires that the liquid ingredients be stirred constantly until the liquid reaches a temperature of 140°C. What type of spoon – wood or metal – will prevent burns to a person’s hand while stirring the hot liquid? Explain your choice.
PLEASE HURRY
Answer:
Wood
Explanation:
Wood because the heat would not be able to travel to the hand to burn it unlike the metal
Calculate the concentrations of all species in a 1.17 M NaCH3COO (sodium acetate) solution. The ionization constant for acetic acid is a=1.8×10−5 .
The concentrations of all species in a 1.17 M NaCH3COO solution is mathematically given as
[Na+] = 1.17 M
[OH-] = 0.00002559 M
[H3O+] = 3.51 x 10-10 M
[CH3COO-] = 1.17 M
[CH3COOH] = 0.00002559 M
What are the concentrations of all species in a 1.17 M NaCH3COO (sodium acetate) solution.?Question Parameters:
1.17 M NaCH3COO (sodium acetate) solution
The ionization constant for acetic acid is a=1.8×10−5.
Generally, the equation for the Chemical Reaction is mathematically given as
NaCH2COO - +H20---><--- CH3COOH+OH-
Therefore
[tex]Ka=\frac{cH3COOH(OH)}{CH2OO-}[/tex]
[tex]5.6*10^{-10}=\frac{*x*x}{1.17m-x}[/tex]
x=0.00002559
In conclusion,
Since other species are given by either for x=0.00002559 or the ionization constant
For[CH3COO-]
[CH3COO-]=1.17-0.00002559
[CH3COO-]=1.167m
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What is an electromagnetic wave?
Answer:
An electromagnetic wave is a wave that is created as a result of vibrations between an electric field and a magnetic field.
Explanation:
Hope this helps!!
A 95.0 g sample of copper (Cp = 0.20 J/°C·g) is heated to 82.4°C and then placed in a container of water (Cp= 4.18 J/°C·g) at 22.0°C. The final temperature of the water and the copper is 25.1°C. What was the mass of the water in the original container? Assume that all heat lost by the copper is gained by the water.
(C:) 84.0 g H2 O
Its the right answer
The mass of the water in the original container by assuming that all heat lost by the copper is gained by the water is 116.23 g.
What is mass?Mass is the term that told the quantity of a matter.
Given the mass of copper = 110g
The specific heat capacity of copper is 0.20 j/C g
The initial temperature of copper is 82.4 C
The final temperature of copper and water is 24.9 C
Now, we would determine the mass of the water.
From the formula for sensible heat, ΔH = m × c × ΔT
Where, H = sensed heat,
m = mass,
ΔT = temperature change
Putting the above values in the equation.
ΔH = m × c × ΔT
110 × 0.20 × ( 82.4 - 24.9 ) = mw × 4.186 × (24.9 - 22.3)
1265 J = mw × 10.8836 or mw = 116.23 g
Thus, the mass of water is 116.23 g.
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which of the following is a cycloalkane?
Answer:
a
Explanation:
Answer:
cyclopentane cyclobutene cyclohexane cycloheptane
Determine the number of Mg2+ and PO3−4 ions required to form a neutral ionic compound. Cations and anions
Answer:
Mg₃(PO₄)₂
Explanation:
Note: The phosphate ion is PO₄³⁻
3Mg⁺² + 2PO₄³⁻ => Mg₃(PO₄)₂
The number of Mg⁺² and PO₄³⁻ ions required to form a neutral ionic compound is:
The number cation, Mg⁺² required is 3The number of anion, PO₄³⁻ required is 2What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to determine the number of cations and anionsTo determine the number of cations and anions, needed to produced a neutral compound, we shall write balanced equation. This is illustrated below:
3Mg⁺² + 2PO₄³⁻ --> Mg₃(PO₄)₂
From the balanced equation above, we obtained the following:
The number cation, Mg⁺² required is 3The number of anion, PO₄³⁻ required is 2Learn more about chemical equation:
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To what temperature must a 2.65 L container filled with 4.47 g of Ar be heated in order to obtain a pressure of 1.24 atm?
The temperature of the container containing the 4.47 g of Ar is 358.16 K
How to determine the mole of ArMass of Ar = 4.47 gMolar mass of Ar = 40 g/mol Mole of Ar =?Mole = mass / molar mass
Mole of Ar = 4.47 / 40
Mole of Ar = 0.11175 mole
How to determine the temperature Number of mole (n) = 0.11175 molesVolume = 2.65 LPressure (P) = 1.24 atmGas constant (R) = 0.0821 atm.L/Kmol Temperature (T) =?The temperature of the container can be obtained by using the ideal gas equation as illustrated below:
PV = nRT
Divide both side by nR
T = PV / nR
T = (1.24 × 2.65) / (0.11175 × 0.0821)
T = 358.16 K
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this time, you will use what you have learned from the discussion . i know you can do it!
advanced flow measuring devices ?
I need info about this topic please
Answer:
they are:-
venturi meter.
orfice plate.
Dall tube .
pitot tube.
Averaging pitot tube .
cone meter.
linear resis meter.
Drag each label to the correct location. Each label can be used more than once.
Match each statement with the two fields of Earth and space science it draws from. If you’re unsure, take a guess.
Answer: I DONT KNOW I guess
Explanation: HONESTLY WHAT ARE YOU TALKING ABOUT???????/
How many grams of O2 are needed to completely burn 69.3g C3H8?
Answer:
C3H8 + 5O2 --> 3CO2 +4H2O
no.of moles of C3H8=64.3/(3*12+8) =1.461363636moles
no.of moles of O2=1.461363636*5 =7.306818moles
mass of O2= 7.306818*(16*2)=233.81g
Explanation:
Several distinct changes take place in the body after a person dies; which one can tell us MOST about whether the corpse was moved?
1. rigor mortis
2. livor mortis
3. algor mortis
4. putrefaction
Answer:
2. Livor Mortis.
Explanation:
The tannish markings standing out from the red markings helps to show if they have been moved from where they orginially had been laying.
Show and explain the stereoisomerism exist in the compound.
(Please answer this i need to submit my assignment before the dateline)
Answer:
There are chiral centers on the molecule thus making it a molecule with stereoisomers.
Explanation:
Stereoisomerism is defined: a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space.
The easiest way to see if this definition is true for any molecule is to see if there are any chiral centers / asymmetric centers. To do this, you would need to look for an sp3 hybridized (tetrahedral) carbon on the molecule with four different groups attached to it. For example, the C in -CH3 would not be a chiral center as there are 3 of the same H's attached to it.
On the given molecule there are 4 chiral centers which makes it a chiral molecule and thus a stereoisomer. Any molecule with one or more chiral centers has stereoisomerism. In this molecule it is easy to see as the chiral centers are the carbons with the wedges and dashes bonded to them indicating the 3D orientation of the constituents. With dashes denoting into page toward the back, and wedges denoting out of the page toward you.
The synthesis reaction to form boron hydride is: 2B(s) + 3H, (g) – B,H,(9) AH = +36 KJ.
What is the enthalpy value for the manipulated reaction: 1/2B, H,(9) - B(s) + 3/2H, (g)?
Answer:-18 KJ
Explanation:
The second reaction is obtained from the first when the first reaction is divided by 2 and reversed. The enthalpy change for the second reaction is -18 kJ.
What is enthalpy?The term enthalpy is defined as the heat absorbed or evolved in a reaction. It could be positive or negative.
If we look at the two reactions as shown in the question, we can see that the second reaction is obtained from the first when the first reaction is divided by 2 and reversed.
Hence, it the follows that the enthalpy change for the second reaction is -18 kJ.
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1) What is the atis of 0.367 moles of CaCI?
A) 40.7 g
B) 111 g
C) 0.033 g
D) 246 B
List 5 spheres and give an example of something you would find in each sphere . Ill give 50 points
how do you revive a person
Answer:
By revive, I assume you're talking about medical assistance.
Explanation:
You can use CPR, where you lay a person back, hold their head up, and push on their chest to the beat "staying alive", in which it keeps their heart beating. If they aren't breathing, you can do mouth to mouth breathing, and continue the process until help arrives or.. the person is no longer with us.
If you have a defibrillator, you can use it on a low amp, or whatever amp you think would be most suitable for the condition of the person.
*yes the person below copy/pasted my thingy. yes its funny.
Answer: i don't even know what you said but i think you said this,
CPR, where you lay a person back, hold their head up, and push on their chest to the beat "staying alive", in which it keeps their heart beating. If they aren't breathing, you can do mouth to mouth breathing, and continue the process until help arrives or.. the person is no longer with us,
If you have a defibrillator, you can use it on a low amp, or whatever amp you think would be most suitable for the condition of the person.
Hope this helps :)
please help!
The amount of available energy decreases with each step up the energy pyramid. How is this related to the fact that there are so many more producers than consumers on Earth?
Answer:
The energy decreases as you move from the bottom to the top of the energy pyramid. 90% of the energy entering each step of the pyramid is used up by the consumers, only 10% of the energy get stored. So, when the next level on the pyramid eats them, that 10% gets passed down to them Use the diagram below to answer the question.
Explanation:
I am sorry if I am wrong
And can you give me brainliest please
I just joined today
helppppppppppppppppppp
Answer:
a. brightness of light
b. the light intensity on the sensor goes below 100( reduces)
How many moles of water are produced from the combustion of 42,0
grams of methane, CH?
CH4+O2 =
CO2 + H2O
[tex]\underline{\underline{\large\bf{Given:-}}}[/tex]
[tex]\red{\leadsto}\:[/tex][tex]\textsf{Amount of Methane,} [/tex][tex]\sf CH_4 = 42\:grams [/tex]
[tex]\underline{\underline{\large\bf{To Find:-}}}[/tex]
[tex]\orange{\leadsto}\:[/tex][tex]\textsf{Moles of water produced from reaction } [/tex][tex]\sf [/tex]
[tex]\\[/tex]
[tex]\underline{\underline{\large\bf{Solution:-}}}\\[/tex]
[tex]\sf Molar \:mass \:of \: CH_4 :- [/tex][tex]\sf \implies 1\times (atomic \: mass \:of \:Carbon )+ 4\times [/tex]
[tex]\sf (atomic\:mass \: of \: hydrogen)[/tex]
[tex]\sf \implies 1 \times 12+ 4\times 1 [/tex]
[tex]\sf \implies 16 grams [/tex]
[tex]\green{ \underline { \boxed{ \sf{Moles \: of \: CH_4= \frac{Amount \:of \: CH_4}{Molar \: mass \: of \:CH_4} }}}}[/tex]
[tex]\begin{gathered}\\\implies\quad \sf \frac{42}{16} \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 2.625 moles \\\end{gathered} [/tex]
The balanced reaction for combustion of methane is-
[tex]\green{ \underline { \boxed{ \sf{CH_4+2O_2 \longrightarrow CO_2+2H_2O}}}}[/tex]
By observation-
[tex]\longrightarrow[/tex]Water produced by 1 mole of methane = 2 moles
[tex]\longrightarrow[/tex]Water produced by 2.625 mole of methane = 2 × 2.625
[tex]\quad\implies[/tex] 5.250 moles
how many moles of each atom are in 1 mole of oxygen
For one gram atomic weight of oxygen with atomic weight of 16 grams, one mole of oxygen also contains 6.022 × 1023 oxygen atoms.
Explanation:
Hope it help....
30. What would happen if the light bulb labeled Lamp B were removed?
Switch
Lamp A
Battery
Lamp B
Lamp C
a. Lamp A and C would still light up.
b. Lamp A and C would both go out.
C. Lamp A would not light, but lamp C would.
d. Lamp A would still light, but lamp C would not.
Answer:
The answer is B.
Explanation:
The answer is be because they are all sharing the circuit, therefore they would all go out.
What is the total number of potassium atoms of this chemical equation? 2CrCO6s+4KOHaq→KHCr2CO10aq+K2CO3aq+KHCOOaq+H2Ol
Answer:
4
Explanation:
...................
What is the central idea illustrated in the 4 sets of pictures above
You can also answer the 4 pics 1 word if you'd like.
Answer:
Battery
Explanation:
Because it has a negative and positive sign
What is the mass of 7.10 x 10^22 molecules of SO3?
Answer:
it is 80.06 g/mol
Explanation:
