Answer:
1.76 moles of HCl.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2KMnO₄ + 8HCl —> 3Cl₂ + 2MnO₂ + 4H₂O + 2KCl
From the balanced equation above,
2 moles of KMnO₄ reacted with 8 moles of HCl.
Finally, we shall determine the number of mole of HCl needed to react with 0.44 moles of KMnO₄. This can be obtained as follow:
From the balanced equation above,
2 moles of KMnO₄ reacted with 8 moles of HCl.
Therefore, 0.44 moles of KMnO₄ will react with = (0.44 × 8)/2 = 1.76 moles of HCl.
Thus, 1.76 moles of HCl is needed for the reaction.
Rocks are classified on the basis of
Answer:
Rocks are classified according to characteristics such as mineral and chemical composition, permeability, texture of the constituent particles, and particle size. This transformation produces three general classes of rock: igneous, sedimentary and metamorphic. Those three classes are subdivided into many groups.
Explanation:
How much heat (J) is required to heat a 75.00 g copper block from 35.0°F to 59.0°F?
Answer:
[tex] \sqrt[.132 = ]{32 = ? = 1} = .82[/tex]
Answer:
693 j
Explanation:
weight =75 g * specific heat of copper = .385j/g * change in temp = 24
= 693
Which word is best used as a synonym for scientific conclusions?
A.
explanations
B.
results
C.
data
D.
observations
Answer:
B
Explanation:
Not C or D becuase it is data would not show a conclusion and observations does show the conclsuion of the scientists. Not A becuase explanation does not mean they have data to support their conclusion. Therefore, it would be B becuase results show what was the effect of something and is often supported with data
Hope that helped :)
Blank is ____ rock in molten form
What is this please help
Answer:
Rock In molten form is Lava
^_^
Imagine blowing up a latex balloon. Assume that you tie the balloon to prevent air from escaping and then squeeze the balloon with one hand, so there is less space inside it. Then assume you use both hands (and maybe a friend’s hands) to squeeze the balloon so there is even less space inside. What do you think will happen to the balloon if you keep squeezing it to a smaller and smaller volume? Explain your prediction.
Answer:
Balloon will burst
Explanation:
The amount of volume that can be held by the latex will reduce yet the volume of air inside does not change. therefore the air inside will force the latex to break.
Assume that you tie the balloon to prevent air from escaping and then squeeze the balloon with one hand, so there is less space inside it then balloon will burst.
What is latex balloon?
latex is what latex balloons are made of. Due to tiny microscopic holes in the latex, it is porous and does not hold helium for as long as foil balloons (mylar balloons).
While latex balloons usually float for only 8–24 hours, foil balloons typically float for 4–21 days. But you can actually get a latex balloon to float longer than a foil balloon by using a product called hi-float, which extends the life of a latex balloon by 25 times the average float time.
In addition to being available in a variety of colors and prints in sizes ranging from 5" to 3 feet, latex balloons can also be printed in many colors, however if you want a detailed design you really need to use foil balloons.
Therefore, Assume that you tie the balloon to prevent air from escaping and then squeeze the balloon with one hand, so there is less space inside it then balloon will burst.
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name the following compounds TeF4
Answer:
Tellurium Fluoride
Explanation:
What is the major organic product obtained from the reaction of 2,2-dimethyl-1-propanol aqueous HBr at reflux
Answer:
See explanation
Explanation:
The mechanism involves SN1 nucleophilic substitution reaction. The -OH group of the alcohol is first protonated. Since water is a good leaving group, -OH2 leaves the substrate creating a primary carbo cation.
A 1,2 methyl shift now occurs to create a tertiary carbo cation which is more stable leading to the major product shown in the image attached to this answer.
Is hot lava a mineral?
Answer: No.
Explanation:
:)
Answer:
Lava is made up of many different molten minerals and other things such as silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium.
Explanation:
Please brainlist me
2.)what is the place value of 7 in 970 123 885
3.)in 292.145,what number is in the thousands place?
4.)what is the place value of 9 in 6547.965?
5.)in 476.8976,what is the
value of underline digi?...si number 7 po naka underline.
Answer:
2.place value is 70 000 00
Two moles of phosphoric acid (H3PO4) contain, respectively: "x" moles of hydrogen atoms, "y" moles of phosphorous atoms, "z" moles of oxygen atoms.
Options:
a)9,3,12
b)2,2,2
c)3,1,4
d)6,2,8
Answer:
d)
Explanation:
in one mole of phosphoric acid you have 3 mol hydrogen, 2 mol phosphorus, and 4 mol oxygen. just multiply everything by 2 and you get 2 mol of phosphoric acid
8. Label the type and parts of the waves shown here.
longitudinal wave
WORD BANK
engitudinal wave
• transverse wave
compression
• rarefaction
crest
trough
Houghton Mifflin Harcourt
Kinetic energy is the energy of motion. How could a person determine how much kinetic energy an object has?
A. by finding its position and form
B. by finding its speed and direction
C. by finding its height and width
D
by finding its mass and speed
Reset
Submit
Answer:
B. by finding its speed and direction
Kinetic energy is the energy an object has due to its motion. As long as an object is moving at the same velocity, it will maintain the same kinetic energy. The kinetic energy of an object is calculated from the velocity and the mass of the object.
QUESTION 3
Which statement is WRONG about electromagnetic waves?
A. Electric field is perpendicular to magnetic field.
B. Vibration of electric fields is perpendicular to propagation direction.
C. Different visible waves show different colors.
D. Different waves propagate in different speed.
Answer:
Different visible waves show different colors
In the electromagnetic spectrum, different visible waves show different colors.
What is electromagnetic spectrum?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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The temperature of a sample of water in the liquid phase is raised 30 degrees Celsius by the addition of 3762 J. What is the mass of the water in grams?
A. 0.03
B. 0.30
C. 30
D. 300
It refers to the number of waves produced in one second.
Answer/Explanation:
f is the number of waves produced by a source per second, it is measured in hertz (Hz). T is the time it takes for one complete oscillation, it is measured in seconds. All waves, including sound waves and electromagnetic waves, follow this equation. A radio wave has a time period of 0.0000003333333 seconds.
What water system is part of the hydrological cycle and generally collects water from precipitation through a drainage basin from
surface runoff and other sources such as groundwater recharge and springs? This water system is usually freshwater flowing towards
an ocean, sea, or lake. In a few cases, it simply dries up completely at the end of its course, and does not reach another body of water.
es 0))
A)
tidal area
B)
watershed
09
wetland
D)
river
Is energy absorbed or released during cellular respiration?
Absorbed
Released
Answer:
Released
Explanation:
they convert into a form of energy that can be used by cells
4. What is the maximum no. of electrons that can be associated with the following set of
quantum numbers?
n=4, l=1, m=-1
a) 10
b) 6
d) 2
c) 4
Answer:
d) 2
Explanation:
We are given;
n = 4, l = 1, m = -1
We can tell that is is an orbital with sub shell as 3P.
Now, from Paul's exclusion principle, each orbital will have maximum of 2 electrons of each π with a spin of +½ and -½.
Since the maximum is seen to be 2, then option D is correct.
Rank the following compounds in order of increasing stability, putting the least stable first. Group of answer choices II < I < III I < II < III III < II < I III < I < II
Hello. You forgot and show the compounds. The compounds are in the attached image.
Answer:
I < II < III
Explanation:
The stability of the presented compounds must be analyzed, taking into account the free electrons to form arrangements between the atoms. In this case, the molecules of greater stability follow the concept of valence and are characterized as those that manage to reach a large number of elements that manage to obey the octet rule.
complete the equation C14H30 = ________ + C7H14
Answer:
C14H30 -----> C7H14 + C2H4 +C5H10
Explanation:
1 In general, how many major glands are found in human body?
A. Eight
B. Ten
C! Thirty-two,
D. Forty six
Answer:
A. Eight
Explanation:
Although there are eight major endocrine glands scattered throughout the body, they are still considered to be one system because they have similar functions, similar mechanisms of influence, and many important interrelationships.
HEY COULD SOMEONE HELP ME WITH THIS PLS PLS ITS DUE TODAY PLS
Answer these questions. What are metals? Write the position of alkali metals and alkaline earth metals in the modern periodic table.
Explanation:
a metal is an element that readily forms positive ions (cations) and has metallic bonds.
Group two of the periodic table comprises the elements beryllium, magnesium, calcium, strontium, barium and radium. The elements in this group, which are all shiny and silvery-white in appearance, are known as the alkaline earth metals. Like the alkali metals, they form alkaline solutions when they react with water.
Which component is missing from the process of photosynthesis?
Carbon Dioxide +
+
Sunlight → Glucose + Oxygen
1-water
2-light energy
3-sugar
4-plants
Move the red warning icon to focus of the earthquake.
Move the green location icon to the epicenter of the earthquake.
Move the blue star icon to the fault.
Answer:
Red goes in the spiky yellow box. Green goes where the red circles are. Blue goes in the small yellow box that is pointing to the line.
Explanation:
The focus of an earthquake is where it starts in the earth. The epicenter is the part directly above the focus on the surface. The fault is the part where the earth's crust splits.
someone help please this is due today!!?
Answer:
I think beaker three will take longer to boil since there is more water present,compared to the other beakers
Tell me, how the different states of matter are different and the same.
Answer:
Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. Gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
Molten zinc chloride can be electrolysed.
Describe how this experiment can be carried out in a laboratory, explaining how the products of this electrolysis are formed.
(6) marks
Answer: The products of electrolysis are Zn(l) and [tex]Cl_2[/tex] gas
Explanation:
Electrolysis of a subastance is breaking it into its constituents by the action of electrical current.
In the electrolysis of molten zinc chloride, zinc metal is produced at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode.
[tex]ZnCl_2(l)\rightarrow Zn^{2+}+2Cl^-[/tex]
At anode : [tex]2Cl^-(l)\rightarrow 2e^-+Cl_2(g)[/tex]
At cathode : [tex]Zn^{2+}(l)+2e^-\rightarrow Zn(l)[/tex]
which is an example of conduction?
Answer:
i think its b
Explanation:
What volume of 0.130 M HCl is required for the complete neutralization of 1.30 g of NaHCO3 (sodium bicarbonate)?
Answer: Volume required is 0.115 L or 115 ml
Explanation:
moles of [tex]NaHCO_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.30g}{84g/mol}=0.015mol[/tex]
The balanced chemical equation is:
[tex]HCl+NaHCO_3\rightarrow NaCl+H_2CO_3[/tex]
1 mole of [tex]NaHCO_3[/tex] requires = 1 mole of HCl
Thus 0.015 mol of [tex]NaHCO_3[/tex] requires = [tex]\frac{1}{1}\times 0.015=0.015[/tex] mole of HCl
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in L
[tex]0.130=\frac{0..015}{V_s}[/tex]
[tex]V_s=0.115L[/tex]
Thus volume required is 0.115 l or 115 ml
