Answer:
Electrolytes
Explanation:
Electrolytes are minerals in your body and balance the amount of water in your body. In this case, it balances the water from the salt by producing a mixture of ions.
Electrolytes are the ions formed when water molecules shatter the ionic bonds of a salt and can conduct an electric current.
Electrolytes are compounds that create ions and may conduct electric current when dissolved in water or melted. These ions may carry electric charges and let electrical energy flow through a solution or molten solid.
Electrolytes are compounds that breakdown into ions when dissolved in water or melted. The presence of these ions permits electricity to pass through the solution or molten material.
Thus, electrolytes are classified as either strong, which entirely breakdown into ions, or weak, which only partially dissociate. Salts, acids, and bases are examples of common electrolytes.
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An experiment looking at structures smaller than a cell would most likely employ a
a. dissecting microscope
b. transmission electron microscope
c. scanning electron microscope
d. compound light microscope
Answer:
In a conventional optical microscope, objects less than about 200 nanometers apart cannot be distinguished from one another. ... Although electron microscopes produce a detailed image of very small structures, they cannot provide an image of the proteins that make up those structures.
Answer:
b. transmission electron microscope
Explanation:
what energy is released when we burn natural gas
Answer:
Heat Energy... I am pretty sure?
Explanation:
There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, heat energy is released when we burn natural gas.
What is energy transfer in thermodynamics?Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. Convection is the flow of heat from one layer of liquid to another layer. Heat energy is released when we burn natural gas. This reaction is called combustion reaction.
Therefore, heat energy is released when we burn natural gas.
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Homeostasis subheading
The maintenance of stable internal conditions is called
Answer:
homeostasis•the maintenance of a stable internal environment
Hope this helps :)
A student is given a mixture of NaCl(s) and NaNO3(s) and is tasked with determining the percent of NaCl in the mixture. The student dissolves 3.613 g of the mixture in 50 mL of DI water. The student then adds excess AgNO3(aq) to precipitate the chloride ion as AgCl(s). The student determines that 2.268 g of AgCl is formed.
Answer:
25.60% of NaCl in the mixture
Explanation:
With the amount of AgCl produced we can now the moles of Cl⁻ = Moles of NaCl. With these moles we can now the mass of NaCl and, as total mass was 3.613g, it is possible to determine mass percent of NaCl in the mixture.
Moles NaCl:
2.268g AgCl * (1mol / 143.32g AgCl) = 0.01582 moles AgCl
Molar mass AgCl 143.32g/mol
0.01582 moles AgCl = Moles Cl⁻ = Moles NaCl
Mass NaCl (Molar mass: 58.44g/mol):
0.01582 moles NaCl * (58.44g / mol) = 0.9248g NaCl in the mixture
Mass percent:
(0.9248g NaCl / 3.613g) * 100 =
25.60% of NaCl in the mixtureExpress the number 0.000746 in scientific notation.
A) 746 x 10-6
B) 7.46 x 102
C) 7.46 x 104
D) 7.46 x 104
E) 0.746 x 10-3
Answer: 7.46 x 10-4
Explanation:You move the decimal place 4 times. For any scientific notation question in the future, look at the answer choices and beside the answer choices work it out. By working it out just take the rounded number (which in this case is 7.46) and go to the decimal and move it however many times it states in the 10 (10-4, move 4).
Help plz this was due 2 days ago but I don’t understand it at all
Answer:
4 mile : 253440 inches
0.004 grams : 1.814 grams
56 miles/hour : 82.133 feet per second
4.5 ml : 0.45 centilitre
34.g/ml : 74.9571691 lb/liter
30 lb: 480 ounces
(10)
Which of the following atoms will not form cation or anion
a. A (Atomic No. 16)
b. B (Atomic No. 17)
CC (Atomic No. 18)
d. D (Atomic No. 19)
Answer:
I think it is b. B (Atomic No. 17)
PLEASE HELP WITH CHEM CLASS!!!!!
Please please please !! Explain depth. Please !!!!
Answer:
The answers to your questions are given below
Explanation:
1. KClO3 => Potassium trioxochlorate (V)
Thermal decomposition of KClO3.
When we heat potassium trioxochlorate (V), KClO3, it will slip into two producing potassium chloride, KCl and oxygen gas, O2 as shown below:
2KClO3(s) —> 2KCl(s) + 3O2(g)
Note: the above reaction will occur faster and at a lower temperature in the presence of manganese (iv) oxide as catalyst.
2a. Determination of the number protons and neutrons in Nitrogen–14.
Nitrogen–14 has the following:
Mass number = 14
Atomic number = 7
Proton =?
Neutron =?
Atomic number of an atom is simply the proton number. Therefore,
Proton = Atomic number
Atomic number = 7
Proton = Atomic number = 7
Proton = 7
Mass number = Proton + Neutron
Mass number = 14
Proton = 7
Neutron =?
14 = 7 + Neutron
Collect like terms
Neutron = 14 – 7
Neutron = 7
Therefore, Nitrogen–14 has 7 protons and 7 neutrons.
2b. Determination of the number protons and neutrons in Nitrogen–15.
Nitrogen–15 has the following:
Mass number = 15
Atomic number = 7
Proton =?
Neutron =?
Atomic number of an atom is simply the proton number. Therefore,
Proton = Atomic number
Atomic number = 7
Proton = Atomic number = 7
Proton = 7
Mass number = Proton + Neutron
Mass number = 15
Proton = 7
Neutron =?
15 = 7 + Neutron
Collect like terms
Neutron = 15 – 7
Neutron = 8
Therefore, Nitrogen–15 has 7 protons and 8 neutrons.
13. The idea that all matter consists of tiny particles in constant motion is an example of a (n)
Answer:
An example is the kinetic theory of matter.
According to this theory, all matter consists of tiny particles that are in constant motion.
Particles move at different speeds in matter in different states.
What are the names of the varibles that a scientist uses when performing a scientif investigation
experiment)?
Answer:
Manipulated (independent) Variable and Responding (Dependent) Variable
Perform the following calculations and express the answer with the proper significant
figures
210.6 mm + 14.57 mm -
Answer:
The answer is
210.6+14.57=225.17mm.
Answer:
Explanation:
0.15 MG +1.15 MG +2.051 MG
what mass of silver has a volume of 105.0 cm^3? The density of silver is 10.50 g/cm^3
Answer:
mass = 1102.50 gExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
Making mass the subject we have
mass = Density × volumeFrom the question
Density of silver = 10.50 g/cm³
Volume = 105 cm³
Substitute the values into the above formula and solve for the mass
That's
mass = 10.5 × 105
We have the final answer as
mass = 1102.50 g
Hope this helps you
what is the name of a solution whose concentration of solute is equal to the maximum concentration that is predicted from the solutes solubility
Answer: DILUTE SATURATED
Explanation:
Answer:
b. saturated
Explanation:
(:
6. Many changes have been made to atomic theory since Daltons time.
A. List the key difference between modern atomic theory and dalton's atomic
theory
B. What important aspect of scientific theories is illustrated by these differences
Answer:
A. Modern atomic theory is, of course, a little more involved than Dalton's theory but the essence of Dalton's theory remains valid. ... Also, there are different kinds of atoms (differing by their masses) within an element that are known as "isotopes", but isotopes of an element have the same chemical properties.
B. The explanation becomes a scientific theory. In everyday language a theory means a hunch or speculation. Not so in science. In science, the word theory refers to a comprehensive explanation of an important feature of nature supported by facts gathered over time.
A graduated cylinder has 3.5 liters of oil. How many milliliters of oil is available in the graduated cylinder? O 3.5 mL O 3500 mL O 35 mL 350 mL
Answer:
3500 Ml
Explanation:
1 liter is equal to 1000 milliliters
3.5 liters is equal to 3500 milliliter
Fluorine (a halogen) is______
because it has______
outer shell electrons.
A. Slightly Reactive, 9
B. Very Reactive, 7
C. Very Reactive, 1
D. Inert, 7
Answer:
The correct answer would be B.
Fluorine (a halogen) is very reactive because it has 7 outer shell electrons.
Explanation:
It's located at the top of the Halogen Group in the periodic table and it's the most electronegative element, this makes it very reactive.
I hope this helps you:)
Fluorine (a halogen) is Very Reactive because it has 7 outer shell electrons.Hence, option (D) is correct.
What are Halogen ?The halogens are a group in the periodic table consisting of five or six chemically related elements: fluorine, chlorine, bromine, iodine (I), and astatine.
The artificially created element 117, tennessine, may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17
Therefore, Fluorine (a halogen) is Very Reactive because it has 7 outer shell electrons. Hence, option (D) is correct.
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hello :) how to do this?
Answer:
28g/ dm³
0.5 M
Explanation:
1dm³= 1000cm³
Let's convert the volume to cm³.
Volume of solution
= 200cm³
= (200÷1000) dm³
= 0.2 dm³
Concentration in g/dm³ means the amount of solute, KOH, in 1 dm³ of solution.
In 0.2 dm³, there is 5.6g of KOH.
Thus in 1 dm³, amount of KOH
= 5.6 ÷0.2
= 28g
Concentration in g/dm³ is 28g/dm³.
Molarity is a concentration unit. It is the number of moles of solvent in 1 L or 1dm³ of solution. Since we have already found the mass of KOH in 1dm³ of solution, we will use dm³.
1dm³ ----- 28g of KOH
moles= mass ÷mr
Molecular mass of KOH
= 39 +16 +1
= 56
1dm³ ----- 28 ÷56= 0.5 moles of KOH
Thus, concentration in molarity is 0.5M.
(Unit for molarity is M)
7) All of the following are
external factors of the
photosynthesis EXCEPT*
O A. Light intensity
O B .Temperature
O c. Chlorophyll content
O D .Oxygen
Answer:
D. Oxygen
Explanation:
External factors of photosynthesis
Light intensityTemperatureChlorophyll contentCarbon dioxideImmediate product
GlucoseByproduct
OxygenHope this helps ;) ❤❤❤
Why does paper "brown" after a while?
Answer:
Exposure to oxygen (especially when combined with sunlight) alters the molecular structure of lignin, causing a change in how the compound absorbs and reflects light, resulting in the substance containing oxidized lignin turning a yellow-brown color in the human visual spectrum.
help!! what does area measure
Answer:
34
Explanation:
What period is the atom in?
1.
What group is the atom in?
What is the name of this atom?
What other atom would have similar
properties to the atom?
Will this atom conduct electricity well?
Answer:
Put these atoms in order from most negative overall charge to least negative
overall charge.
11 Atom X: 104 protons, 102 electrons
11 Atom B: 24 protons, 18 electrons
1 Atom Q: 15 protons, 16 electrons
11. Atom P: 7 protons, 10 electrons
Explanation:
What period is the atom in?
1.
What group is the atom in?
What is the name of this atom?
What other atom would have similar
properties to the atom?
Will this atom conduct electricity well
3. A wave has a wavelength of 10 m and a speed of 340 m/s. What is the frequency of the
wave?
Answer:
We have the wavelength which is 10,speed/velocity=340 and frequency=?.
The formula is velocity=frequency × wavelength.
340=f × 10.
340=10f.
frequency=34hertz.
Answer:
34hertz
Explanation:
We have the wavelength which is 10,speed/velocity=340 and frequency=?.
The formula is velocity=frequency × wavelength.
340=f × 10.
340=10f.
frequency=34hertz.
Explain why flourine forms a negative ion more easily than chlorine.
Answer:
the electron is outermost
Explanation:
shell of a flourine are closer together .
Answer:
The electron gain enthalpy of chlorine is more negative than fluorine. This is because fluorine is smaller in size than chlorine. Thus the extent of electron-electron repulsion would be more in fluorine than in chlorine. Because of this, the incoming electron would face more repulsion in fluorine than in chlorine.
Explanation:
Read the following statement.
Changes must occur at a structural level in order to be considered chemical.
Which detail from the article provides the BEST example to support this statement?
A
For instance, a block of wood may feel rough when you run your finger across it but rubbing the wood with sandpaper smooths the surface so it no longer feels rough.
B
A piece of metal may be heated in a fire until it glows, but the metal is the same material before heating and after cooling.
C
Think about ice melting into water, and then water being heated up and turning into steam.
D
The creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
Answer:
D
Explanation:
A new substance must form in a chemical change. structure, properties and composition must change in a chemical change.
The creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
What is reaction?Reaction is defined as a process in which one or more substances are also called as reactant, are convert to one or more different substance known as product.
There are basically five types of reaction
Combustion reactionDecomposition reactionNeutralization reactionPrecipitation reactionSynthesis reactionA new reaction must have chemical change as well as physical change such as structure, properties and composition.
Thus, the creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
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what is mean by exhaustible natural resources of list some
Answer:
enr are those resources which are present in limited quality and can be use completely used up by human activities are called enr .example coal petrol
Which of the following substances is more likely to dissolve in water? Which of the following substances is more likely to dissolve in water? HOCH2CH2OH O || CH3(CH2)9CH CCl4 CHCl3 CH3(CH2)8CH2OH
Answer:
HOCH₂CH₂OH
Explanation:
You generally assume that polar dissolves polar and nonpolar dissolves nonpolar. Since water is polar, we are looking for a polar molecular.
This cancels out CH₃(CH₂)₉CH and CCl₄.
You are left with CHCl₃, CH₃(CH₂)₈CH₂OH, and HOCH₂CH₂OH. You would pick the third option since it is the most polar.
The compound HOCH2CH2OH having two O - H groups is more likely to interact with water.
A substance is soluble in water if it is capable of interacting in an electrostatic interaction. Water can form hydrogen bonds with other molecules that posses polar O - H bonds.
Hence, looking at the options provided in the question, we will observe that the compound HOCH2CH2OH having two O - H groups is more likely to interact with water.
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You are given a cube of pure copper when you calculate the density using
your measurements, you get 8.78 grams/cm3. Copper's accepted density
is 8.96 g/cm3. What is your percent error? *
Answer:
2.01% to the nearest hundredth.
Explanation:
Percent error =[ (8.96-8.78) / 8.96]* 100
= 0.020089 * 100
= 2.0089 %
The Percent error is 2.01% to the nearest hundredth.
How to calculate the percent error?Suppose the actual value and the estimated values after the measurement are obtained. Then we have:
Error = Actual value - Estimated value
To calculate percent error, we will measure how much percent of actual value, the error is, in the estimated value.
[tex]\rm Percent \: Error = |\dfrac{Error}{Actual value}|\times 100 \\\\[/tex]
[tex]Percent \: Error = | \dfrac{\text{(Actual Value - Estimated Value)}}{Actual value}|\times 100 \\[/tex]
(here |x| is such that it makes x non negative, thus, |-5| = 5, and |5| = 5)
WE have been given a cube of pure copper when you calculate the density using your measurements, you get 8.78 grams/cm3. Copper's accepted density is 8.96 g/cm3.
Percent error =[ (8.96-8.78) / 8.96]* 100
= 0.020089 * 100
= 2.0089 %
Hence, the Percent error is 2.0089 %.
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Solve for a. a(b + c)=d
a = d/(b + c)
Explanation:a(b + c) = d
a = d/(b + c)
Answer:
[tex]\huge \boxed{a= \frac{d}{b+c} }[/tex]
[tex]\rule[225]{225}{2}[/tex]
Explanation:
[tex]a(b+c)=d[/tex]
Dividing both sides by (b + c).
[tex]\displaystyle a= \frac{d}{(b+c)}[/tex]
[tex]\rule[225]{225}{2}[/tex]
Why did a drop of water need to be added in order to initiate the reaction? Select one: a. because the water is needed to wet the chlorine gas so the reaction could occur b. because the water is needed to cool off the reaction so the flask will not explode c. because the water is needed to wet the sand and keep the reaction safe d. because the water is needed to remove a coating on the surface of the metal. It's not A
Answer:
c
Explanation:
because the water is needed to wet the sand to keep d reaction safe
which of the following indicates 4 molecules of water?
Answer:
C
Explanation:
Step 1: Solve
We know water has the formula of H20, if we have more molecules of water we don't touch the subscripts because that would change the substance so we can only add coefficients to the formula