Answer:
is 5
Explanation:
Because the baking soda has the same kilograms
True or false? Acid strength and acid concentration both mean the same thing.
Answer:False
False
Explanation:acid concentration and acid strength are two completely different
it is false..hope it helps you
What’s the answer?????
Answer:
kinetic energy
potential energy
kinetic energy
kinetic energy
Explanation:
kinetic energy- energy associated with motion
potential energy- the energy that a piece of matter has because of its position or nature.
Explain why the equation ( x - 4 ) ^2 - 28 =8 has two solutions. Then solve the equation to find the solutions. Show your work. ( Will Mark Brainliest). Please only answer if you are 100% sure.
Taking into account the discriminant and quadratic formula:
As Δ> 0 the function has two real roots or solutions.The solutions are x1= 10 and x2= -2.Zeros or solutions of a function
The points where a polynomial function crosses the axis of the independent term (x) represent the so-called zeros of the function.
That is, the zeros represent the roots of the polynomial equation that is obtained by making f(x)=0.
In summary, the roots or zeros of the quadratic function are those values of x for which the expression is equal to 0. Graphically, the roots correspond to the abscissa of the points where the parabola intersects the x-axis.
DiscriminantThe function f(x) = ax² + bx + c
with a, b, c real numbers and a ≠ 0, is a function quadratic expressed in its polynomial form (It is so called because the function is expressed by a polynomial).
The following expression is called discriminant:
Δ= b²- 4×a×c
The discriminant determines the amount of roots or solutions of the function.
Then:
If Δ <0 the function has no real roots and its graph does not intersect the x-axis.If Δ> 0 the function has two real roots and its graph intersects the x-axis at two points.If Δ = 0 the function has a real root and its graph intersects the x-axis at a single point that coincides with its vertex. In this case the function is said to have a double root.Amount of solutions of function (x - 4)² - 28 =8The function (x - 4)² - 28 =8 can be expressed as:
(x - 4)² - 28 -8= 0
(x - 4)² - 36= 0
x²- 8x + 16 - 36= 0
x²- 8x + 16 - 36= 0
x²- 8x - 20= 0
Being:
a= 1b= -8c= -20the amount of solutions are calculated as:
Δ= (-8)²- 4×1×(-20)
Δ= 144
As Δ> 0 the function has two real roots or solutions and its graph intersects the x-axis at two points.
Solutions of a cuadratic functionIn a quadratic function that has the form:
f(x)= ax² + bx + c
the zeros or solutions are calculated by:
[tex]x1,x2=\frac{-b+-\sqrt{b^{2}-4ac } }{2a}[/tex]
Solutions of function (x - 4)² - 28 =8The function (x - 4)² - 28 =8 can be expressed as x²- 8x - 20= 0
Being:
a= 1b= -8c= -20the solutions of the function are calculated as:
[tex]x1=\frac{-(-8)+\sqrt{(-8)^{2}-4x1x(-20) } }{2x1}[/tex]
[tex]x1=\frac{-(-8)+\sqrt{144 } }{2x1}[/tex]
[tex]x1=\frac{8+\sqrt{144 } }{2}[/tex]
[tex]x1=\frac{8+12 }{2}[/tex]
[tex]x1=\frac{20}{2}[/tex]
x1= 10
and
[tex]x2=\frac{-(-8)-\sqrt{(-8)^{2}-4x1x(-20) } }{2x1}[/tex]
[tex]x2=\frac{-(-8)-\sqrt{144 } }{2x1}[/tex]
[tex]x2=\frac{8-\sqrt{144 } }{2}[/tex]
[tex]x2=\frac{8-12}{2}[/tex]
[tex]x2=\frac{-4}{2}[/tex]
x1= -2
Finally, the quadratic function (x - 4)² - 28 =8 has two solutions and the solutions are x1= 10 and x2= -2.
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I need help with this please
how many layers are there in the earth
Answer:
3 i think
Explanation:
The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe. Earth's interior is generally divided into three major layers: the crust, the mantle, and the core.
A solution of naoh has a concentration of 25% by mass. what mass of naoh is present in 0.250 g of this solution? use the periodic table in the toolbar if needed. g
The mass of NaOH present in the solution is, 0.0625 grams
What will be the Mass?The mass is defined as the quantity of the matter present in the solution or in any substance.
Given that,
Mass % of NaOH in the solution= 25 %
Mass of solution = 0.250 g
The formula will be
[tex]\rm Mass\ percent=\dfrac{mass \ of\ NaOH}{Mass\ of\ solution} \times 100[/tex]
[tex]25=\dfrac{\rm Mass\ of \ NaOH}{0.250} \times 100[/tex]
Mass of NaOH=0.0625 gram
Thus the mass of NaOH present in the solution is, 0.0625 grams
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The mass of NaOH present 0.250 grams of solution is 0.0625 grams.
How we calculate the mass?Mass of any substance present in any solution will be calculated by using their & mass as below:
Mass percent = (Mass of solute / Mass of solution) × 100
Given items according to the question,
% mass of NaOH = 25%
Mass of solution = 0.250g
Now e put these values on the above equation and we get,
Mass of NaOH = (5 × 0.250) / 100 = 0.0625 grams.
Hence, mass of NaOH is 0.0625 grams.
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Pls help with chemistry
The answer is D.
Activated complex
The boiling points of different substances are given in the table below.
Substance
Boiling point (°C)
Acetic acid
118.1
Benzene
80.2
Chloroform
61.2
Water
100.0
Which substance most likely has the strongest intermolecular forces?
acetic acid
benzene
chloroform
water
Answer:
A) acetic acid
Explanation:
Acetic acid most likely has the strongest intermolecular forces. Hence, option A is correct.
What is the boiling point?The boiling point of a substance is the point at which the vapour pressure of a liquid is equal to the surrounding pressure and water is 313k for absolute temperature and 212°F for Fahrenheit.
The intermolecular force of attraction depends on the strength or extent of Hydrogen bonding present in a substance.
Benzene and chloroform do not have hydrogen bonding being non-polar molecules.
Water has hydrogen bonding being polar.
However acetic acid being the most polar has the maximum hydrogen bonding.
Thus acetic acid has the strongest intermolecular forces of attraction.
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What does the abreviation asa stand for chemically?.
Answer:
it stands for Acrylonitrile styrene acrylate
Explanation:
Wat helps measure 26 ML of a liquid
Answer:
6 liquids
Explanation:
because yea
Graduated cylinder is used for accuracy
WHAT DO YOU UNDERSTAND BY OLFACTORY INDICATORS?
Answer:
An Olfactory Indicator is a chemical that changes it's scent. This depends on whether it is mixed with an acid or base solution. When mixed, it's called "olfactory titration."
Explanation:
Hope I helped :)
What evidence did you see of the microscope resolving power
Methane is the main constituent of a fossil fuel.
(i) Name this fossil fuel.
Answer:
natural gas
Explanation:
natural gas is formed deep beneath Earth's surface which primarily consist of methane.
methane is considered cleanest burning fuel.
Does the metals determine how high or low voltage is in fruit battery?
Or is it the pH level in fruits that determines voltage? also can you give a source to this.
Answer: 1.788 volts.
Explanation:
To solve this problem we can combine battery cells to create higher voltages. Building more lemon batteries and connecting them with a metal wire from "+" to "-" adds the voltage from each cell. The two lemon batteries above, combine to produce a voltage of 1.788 volts.
What type of crystal is this? Very important!!!
Answer:
ruby
Explanation:
A sample of 3.05 g of banana was burned in a coffee cup calorimeter filled with 500.0 g of water. the heat released caused the temperature of the water to increase 5.7°c. note: heat capacity, c, of the water is 1.00 cal/g･°c.
calculate the caloric content of the banana in nutritional calories per gram. remember a nutritional calorie (c) is 1 kcal.
The caloric content of the banana in nutritional calories per gram is :
934.4 cal/g
Given data :
mass of banana ( Mb ) = 3.05 g
mass of water ( Mw )= 500 g
change in temperature ( ΔT ) = 5.7°c
Cw = 1.00 cal/g･°c.
Determine the caloric content of the bananaFirst step : calculate heat released
Qw = Mw* Cw * ΔT
= 500 * 1 * 5.7
= 2850 cal
Next step : Calculate the caloric content of the banana
caloric content = Qw / Mb
= 2850 cal / 3.05 g
= 934.4 cal/g
Hence we can conclude that The caloric content of the banana in nutritional calories per gram is : 934.4 cal/g
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Which term refers to the number of moles of solute per liter of solution?.
Answer:
Molarity I believe
Seesee said it would be fun to travel 134 km/h. If she was able to drive that fast for 7.5 h, how far would she have traveled?
Answer:
The answer is 1005 kmExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × timeFrom the question
velocity = 134 km/h
time = 7.5 hr
We have
distance = 134 × 7.5
We have the final answer as
1005 kmHope this helps you
significant figures in the measurement 0.070020 meter?
Answer:
There are 5 significant figures
There are five significant figures in the measurement 0.070020 meter.
What do you mean by significant figure ?Significant figures are the number of digits that add to the correctness of a value, frequently a measurement.
The first non-zero digit is where we start counting significant figures. Determine how many significant digits there are given a range of numbers.
The crucial or important digits that accurately represent the meaning of a certain number are known as the significant figures of that number. 6.658, for instance, has four significant digits. These huge amounts give the numbers accuracy.
In the given example there are five first non-zero digit are present.
Thus, There are five significant figures in the measurement 0.070020 meter.
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**Please answer quickly!** 5.1169 mol of Ne is held at 0.9148 atm and 911 K. What is the volume of its container in liters?
Answer:
418.352441397 Liters
Explanation:
You start off with your equation of PV=nRt, where P= Pressure, V= Volume, n= The amount of moles, R= the gas constant which is 0.0821, and t= The temperature.
You are solving for volume so you would divide the left side by P so you can isolate the Volume. Now you have V=nRt/P.
Next you would fill in all of the variables. n=5.1169, R=0.0821, t=911K, and P=0.9148atm.
You would get the equation V=(5.1169*0.0821*911)/0.9148
Your final answer would be 418.352441397 Liters, or rounded to 418.35 Liters.
The volume of the container is 418.15 L
Ideal gas lawFrom the question, we are to determine the volume of the container
From the ideal gas equation, we have that
PV = nRT
Where P is the pressure
V is the volume
n is the number of moles
R is the gas constant ( R = 0.08206 L.atm.mol⁻¹.K⁻¹)
and T is the temperature
From the given information
P = 0.9148 atm
n = 5.1169 mol
T = 911 K
Putting the parameters into the formula, we get
0.9148 × V = 5.1169 × 0.08206 × 911
Then,
[tex]V = \frac{5.1169 \times 0.08206 \times 911}{0.9148}[/tex]
V = 418.15 L
Hence, the volume of the container is 418.15 L
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Once nonrenewable resources like oil, natural gas and uranium are used up, there ___________ be any more in your lifetime. will or wont?
Answer:wont
Explanation:
Determine the name of each ionic compound. Spelling counts.
KZP:
Allz:
MgO:
An ionic compound is a type of chemical compound composed of positively charged ions (cations) and negatively charged ions (anions) held together by electrostatic forces. The correct answer is:
[tex]K_3P[/tex] : potassium phosphide
[tex]AlI_3[/tex] : aluminum iodide
[tex]MgO[/tex] : magnesium oxide
Ionic compounds are formed through ionic bonding, which involves the transfer of electrons from one atom to another.
In an ionic compound, the cations and anions are attracted to each other due to their opposite charges, forming a crystal lattice structure. The cations are usually metal ions, while the anions are typically non-metal ions. The transfer of electrons creates ions with full outer electron shells, resulting in the formation of stable compounds.
Therefore, the correct answer is:
[tex]K_3P[/tex] : potassium phosphide
[tex]AlI_3[/tex] : aluminum iodide
[tex]MgO[/tex] : magnesium oxide
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Some children pass around a block of ice. Their hands feel cold and wet. Why do the children feel cold on touching the ice block?
(middleschool)
Answer:
See below.
Explanation:
The children feel cold on touching the ice block as the temperature of it is much less than body temperature.
energy is transmitted only in indivisible, discrete quantities called
Answer:
photon
Explanation:
Energy usually travel in a discrete quantities which are very indivisible, this quantity is known as Photons.
A photon can be regarded as a smallest discrete quantum of electromagnetic radiation. It can be referred to as basic unit of all light. Photons are particles which are always in motion, they usually travel in vacuum at a speed of light.The photon are elementary particle with no mass and serve as quantum of the electromagnetic field as well as electromagnetic radiation such as light , Their velocity is [tex]2.998 x 10^8 m/s.[/tex]
Therefore, photon is an elementary particle.
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Which of the following statements explains the solubility of ionic substances in water?
O Water is a covalent substance.
O The molar mass of water is 18.02 g/mol.
O An oxygen atom has 6 valence electrons.
O Water molecules are polar.
Answer:
Explanation:
The statement which explains the solubility of ionic substances in water is Water molecules are polar.
What is an ionic compound?Ionic compounds contain ions and are held together by the attractive forces among the oppositely charged ions.
Most ionic compounds are soluble in water. Polar water molecules have a strong attraction for charged ions and the charged ions become solvated as they dissociate into the water and ionic compounds are soluble in water.
Break apart of ionic compounds into the ions that make them up through a process called dissociation. All ionic substances are dissociated in water but dissociation may vary.
Water is a polar covalent and all polar covalent substances dissolve in the water because polar water molecules form hydrogen bonds with ions which allow compounds to disperse in water.
Hence, option D is correct.
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What is the electron configuration of the chloride ion?
Answer:
La configuración electrónica del cloruro es 1s2 2s2 2p6 3s2 3p6.
Explanation:
Derrick decided to research what factors might affect the properties of the solubility of a solution. After completing his research, Derrick knew that several factors affected the properties of solubility. Explain the factors that affect the properties of the solubility of a solution.
Answer:
Solubility refers to the maximum amount of solute that dissolves in a given amount of solvent at a particular temperature Factors Affecting Solubility 1. Effect of Temperature For some substances to dissolve in a given solvent, heat is absorbed. The reaction is endothermic. In this case, an increase in temperature increases solubility.
Explanation:
Solubility of a solution is affected by properties like temperature and pressure.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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Students put a ballon on a top of a bottle of water. The students placed the bottle in a container of very hot water and the ballon began to expand. A) All of the water evaporated B) The gas in the bottle expanded as it became warmer C) Some of the gas in the bottle condensed to liquid water D) the water expanded into the ballon as it became warmer
Answer:
b
Explanation:
Why is a typical car battery in a car is filled with a solution of sulferic acid
Answer:
Sulfuric acid has a higher density than water, which causes the acid formed at the plates during charging to flow downward and collect at the bottom of the battery.
How much heat is released as the temperature of 465 g of water drops from 75.0°C to 18.2°C?
The heat released : -110560.632 J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
Knownm =465 g
c water = 4.186 J/gram °C
∆T = temperature difference = 18.2 - 75 = - 56.8 °C
Then the heat :
[tex]\tt Q=m.c.\Delta T\\\\Q=465\times 4.186\times -56.8\\\\Q=\boxed{\bold{-110560.632~J}}\rightarrow -=exothermic[/tex]