hello :) for qn 3 , I got 0.01 mol but I’m not sure if it’s correct :/ I need help , thanks!

Hello :) For Qn 3 , I Got 0.01 Mol But Im Not Sure If Its Correct :/ I Need Help , Thanks!

Answers

Answer 1

Answer:

0.05 dm³

Explanation:

Please see the attached picture for full solution.

The question is asking for the volume of H₂SO₄, so we need to find the number of moles of KOH then the number of moles of H₂SO₄. (Using mole ratio from the balanced equation) Also, potassium hydroxide is KOH not K₂SO₄ :)

Hello :) For Qn 3 , I Got 0.01 Mol But Im Not Sure If Its Correct :/ I Need Help , Thanks!

Related Questions

Radar detectors use radio waves to measure the speed of moving
vehicles. Radar detectors have a wavelength of 1.8 meters. What is the frequency of waves from a radar detector?

Answers

Answer:

1.7x10^8 Hz

Explanation:

Frequency could be explained as the number of occurrences of a repeating event at a time

Given:

wavelength = 1.8 meters

The frequency f of the waves can be calculated using f = c / λ

Where c (m/s) is the speed of the wave

λ (m) is the wavelength

Speed c= 3*10^8 m/s

Frequency f= 3*10^8 /1.8

Frequency= 1.7x10^8 Hz

Therefore,the frequency of waves from a radar detector is 1.7x10^8 Hz

Find the probability that 200 tosses of a coin will result in (a) between 80 and 120 heads inclusive, (b) less than 90 heads,(c)less than 95 heADS (D) EXACTLY 100 heads

Answers

Answer:

between 80 to 120

Explanation:

because it would be around 100 but it can't be exact.


1. The density of a substance is 4.8 g/mL. What is the volume of a
sample that is 19.2 g?

Answers

Answer:

d= 4.8g/mL

m= 19.2 g

V=m/d

V= 4 mL

What does a straight line represent on a distance vs time graph?

Answers

A straight line on a distance va time graph represents constant speed

Answer:

It represents the relationship between the distance travelled and time spent as constant or at a stop.

Explanation:

This is because as the line progresses, the time increases the distance should change as well my moving up or down, in a linear equation this relationship is constand but if the line is horizontal though, the distance is not changing despite time passing which means it has come to a stop.

Is this atom Reactive (unstable) or Unreactive (stable) ?

Answers

Answer:

The answer is Unreactive.

Explanation:

This is an unreactive atom because it has completely filled out stable electrons in the outer shell.

8 electrons in the outer shell means stable.

What will most likely occur if sulfur forms an ionic bond with another element? (Click on the icon for the periodic table to view sulfur)

Sulfur will accept electrons.
Sulfur will donate electrons.
Sulfur will become a positive ion.
Sulfur will become less stable.

Answers

Answer:

The answer is Sulfur will accept electrons

Explanation:

Because it will most likely occur if sulfur forms an ionic bond with the elements

If sulfur forms an ionic bond with another element then the sulfur will accept electrons. Hence option A is correct.

What is ionic bond?

Due to their electrostatic attraction, oppositely charged species interact via ionic bonding, a form of chemical connection.

One atom transfers electrons to another when a positively charged ion forms a connection with a negatively charged ion.

Example: NA+ and Cl- gives NaCl

Sulfur belongs to group 6A of non-metals. Its valence electrons number six. It follows the octet rule. It must acquire two electrons. Thus, it creates two single covalent connections (ionic bonds).

When sulfur receives two electrons, it is ionized itself, so it from an ion with a 2-charge.

Sulfur will accept electrons will mostly likely occur if sulfur forms an ionic bond with another element. Hence option A is correct.

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An ionic bond for calcium and oxygen is CaO. If an oxygen ion has a charge of two negative, what is the charge for calcium? +2 –1 +1 –2

Answers

Answer:

+2

Explanation:

why does neon have a higher first ionization energy than fluorine

Answers

I’m just here for the points sorry

Which of the following are fluids

Answers

all it says is which of the following are fluids
What are the options

To separate a mixture of iron filings and salt, the most efficient method would be

Answers

Answer:

Explanation:

Of course you could do the separation chemically. Dissolve the salt up in water, pass thru a filter, wash the iron filings with ethanol, which would encourage the salt to precipitate from solution.

I do hope I helped you! :)

Answer:

by passing a magnet through the mixture

Explanation:

What is the atomic number of an atom that has 5 neutrons and 4 electrons

Answers

The atomic number is 4.

The atomic number of the given atom is equal to 4.

What is the atomic number?

The atomic number (symbol Z) of a chemical element can be defined as the charge number of an atomic nucleus. For an ordinary atom, the atomic number is equal to the number of protons found in the nucleus of an atom of that element.

The atomic number helps to uniquely identify ordinary chemical elements. In an ordinary uncharged atom or neutral atom, the atomic number of that atom is also equal to the number of electrons.

For a neutral atom, the sum of the atomic number and the neutron number gives the atomic mass. The protons and neutrons have approximately the same mass. Atoms that have the same atomic number but different numbers of neutrons or different mass numbers are known as isotopes.

Given the number of electrons in the atom is 4. Therefore, the atomic number of that atom will be equal to 4.

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An ice cream company decides to make a new lower calorie flavor,but testers reported that the flavor wasnt as good as the original.Is this an example of trade off

Answers

Answer:

Yes, the given instance is an example of a trade-off.

Explanation:

The trade-off seems to be a strategy to minimize or surrender one or more favorable results in consideration for increasing either receiving other favorable results to optimize cumulative benefit or efficacy within such conditions.The above is indeed a trade-off since the participants are experimenting in exchange again for ice cream individuals have to enjoy. The ice cream manufacturer always gets a review of the technician in exchange for free ice cream.

Please answer this question, I will give brainliest! You fill a 2.0 L metal thermos with gas at room temperature (25.0 ˚C) and 1.0 atm. Put it in the freezer and the temperature drops to -15.0 ˚C. A. What is the pressure inside the thermos after it cools, in atm? Justify your answer. B. . … and what is that pressure in mmHg?

Answers

e temperature of a 0.750 L gas sample at 25°C and 2.00 atm is changed to 250°C.


1. Which statement best describes why a gas is
easily compressible while most solids
are incompressible?
A. The molecules of a gas are much smaller
than those of a solid.
B. The molecules of a solid are not attracted to
one another.
C. The molecules of a gas are much further
apart than those of a solid.
D. The molecules of a solid are much larger
than those of a gas.

Answers

C) The molecules of a gas are much further

apart than those of a solid.

A gas is easily compressible while most solids are incompressible because the molecules of gas are much further apart than those of a solid.

What are gases?

Gases is one of the four fundamental state of matter.

Gases can be defined as phase of matter that neither have fixed shape nor have fixed volume.

The molecules of gases are far apart from each other as compare to other phases of matter.

The change in properties of volume is known as compressibility and those fluid whose volume changes are known as compressible fluids or gases.

The fluids which does not compressed or expanded and its volume remain constant are known as incompressible fluids or gases.

Thus, gas is easily compressible while most solids are incompressible because the molecules of gas are much further apart than those of a solid.

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What are some tips *from a girl* to get a girl to like you without making it obvious

Answers

just be nice, and compliment her
Ok to me this something you got to figure out on your own because not every girl is the same, take me for example i don’t care for anybody like or who likes me being nice i like them aggressive and honest but with like 10% of nice but not all time so i hope i could help you!

What kind of questions CANNOT be answered by chemistry?

If someone could help me out I would really appreciate it! Thank you!

Answers

Answer:

d. why matter exists

Explanation:

The kind of questions that chemistry CANNOT answer is "why matter exists".

In Chemistry, question of how the properties, composition and structure of substances are is answered. Also, the transformations that these substances undergo, and the energy that they release or absorbe during the transformation processes are revealed in chemistry.

Chemistry can answer the question of what forms of matter exists but cannot answer why matter actually exists.

Some chemical reactants are listed in the table below. Complete the table by filling in the oxidation state of the highlighted atom.

Answers

Answer:

1. Cu = +2

2. O = – 2

3. C = +2

4. N = 0

Explanation:

Note:

A. The oxidation state of oxygen is always – 2 except in peroxides where it is – 1.

B. The oxidation state of Hydrogen is always +1 except in metallic hydrides where it is – 1.

Now let us solve the question given above.

1. CuO = 0 (ground state)

Cu + O = 0

O = – 2

Cu + (– 2) = 0

Cu – 2 = 0

Collect like terms

Cu = 0 + 2

Cu = +2

2. H2O = 0 (ground state)

2H + O = 0

H = +1

2(1) + O = 0

2 + O = 0

Collect like terms

O = 0 – 2

O = – 2

3. CO = 0 (ground state)

C + O = 0

O = – 2

C + (– 2) = 0

C – 2 = 0

Collect like terms

C = 0 + 2

C = +2

4. N2 = 0 (ground state)

2N = 0

Divide both side by 2

N = 0/2

N = 0

A calorimeter made from a can is used to measure the calories in a peanut. During the experiment, the

measured calories were 35% of the true/accepted value given by references

Answers

Answer:

The heat generated per gram of sample in calories is 0.87 g

Explanation:

Given that,

A calorimeter made from a can is used to measure the calories in a peanut.

During the experiment, the  measured calories were 35% of the true/accepted value given by references

Suppose, the mass of peanut is 0.4 g and find the

We need to calculate the heat generated per gram of sample in calories

Using formula of heat generated

[tex]q=\dfrac{q_{penut\ calorimeter}}{m_{peanut}}[/tex]

Put the value into the formula

[tex]q=\dfrac{0.35}{0.4}[/tex]

[tex]q=0.87\ g[/tex]

Hence, The heat generated per gram of sample in calories is 0.87 g

How many significant figures are in the following number?
5.67 x 106
3
6
4

Answers

The answer would be 3 because every number other than 0 is significant. 0 is significant if it is sandwiched between other numbers like 0.50078 (5 sig figs) or if it’s at the end of a decimal 0.450 (3 sig figs)
another practice example would be 0.00456 (3 sigfigs)

This element has nine more electrons than Technetium

Answers

Answer:

Tellurium

Explanation:

Technetium's position on the periodic table is 43 and Tellurium's is 52

Which statement explains how the bands in the crystal of a metal are like atomic orbitals?
A. They both have localized electrons that orbit specific atoms.
B. They both involve ionization of some atoms so bonding can occur.
C. They both have delocalized electrons that move from atom to atom.
D. They both allow electrons to move from lower energy levels to higher energy levels.

Answers

Answer:

D

Explanation:

Correct On EDU

Crystal lattice of metals are highly ordered in which the ions and electrons are arranged in a stoichiometric proportion. But,electrons can excite to higher energy levels as they fo in atomic state. Thus , option D is correct.

What is crystal lattice?

Crystal are highly ordered structures of solids and is anisotropic in nature with a perfect geometry and crystal lattice units. There will be free electrons present in the interstices spaces and which can be delocalized throughout the lattice results in conduction.

Electrons can acquire energy to excite to the higher energy levels from the lower energy level in a crystal lattice. Electrons are revolving around the nucleus of an atom through definite circular paths of fixed energy.

Electrons in an atom tends to excite to higher energy levels and then will return to the lower energy level by emission of energy in the form of light or heat. This process make the element coloured and conducting as in the case of crystal bands in metals.

Hence, both atoms and metal lattice allow electrons to move from lower energy levels to higher energy levels and option D is correct.

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How to calculate the amount of water needed to dilute a solution?

Answers

Answer:

Suppose you must prepare 400 ml of a disinfectant that requires 1:8 dilution from a concentrated stock solution with water. Divide the volume needed by the dilution factor (400 ml / 8 = 50 ml) to determine the unit volume. The dilution is then done as 50 ml concentrated disinfectant + 350 ml

11. Calculate the number of atoms of sodium in a 4.5-gram sample.
A 1.2 x 1023 atoms Na
B 2.5 x 1023 atoms Na
C 1.7 x 10-22 atoms Na
D 3.1 x 1024 atoms Na

Answers

Answer:

A

Explanation:

What is the temperature 51°C expressed in kelvins?

Answers

Answer:

The answer is

324 K

Explanation:

To express a given temperature in degree Celsius to Kelvin simplify add 273 to the given value

That's

K = 273 + °C

where

K = Kelvin

°C = value in degree Celsius

From the question the value to be converted is 51°C

It's equivalent in Kelvin is

K = 273 + 51

We the final answer as

324 K

Hope this helps you

plz answer soon need answer
when talking about sodium carbonate reaction as the amount of surface area increases what happens to the rate of this reaction????
rate is faster
rate is slower
rate stays same​

Answers

Answer:

rate is faster

Explanation:

the rate of reaction increases.

Answer:

The rate is faster

Explanation:

just did it on edg :)

Which is more viscous - petrol or diesel?

Answers

Answer:

Petrol....

follow me and mark me brainliest

Answer The answer to this question is diesel.

Explanation:

Hi there, hope this helps!

How many protons in an atom of beryllium

Answers

Answer: 4

Hope this helps!

Please consider marking Brainliest!

there are 4 protons in beryllium

HELP! WILL GIVE BRAINLY!!!

Density is an intensive physical property because the density of a given substance does not change with the size of the sample. (2 points)
True
False

Answers

Answer:

True

Density = mass/volume

Suppose that a block has a mass of 20 g and a volume of 20 cm^3.

Density = 20 g/20 cm^3 = 1 g/cm^3

Now, you cut the block in half. The half-block has a mass of 10 g and a volume of 10 cm^3.

The density of the half-block is

Density = 10 g/10 cm^3 = 1 g/cm^3

The density stays the same, even though the size of the sample has changed.

Explanation:

Answer:

✅True

Explanation:

Density is an intensive physical property because the density of a given substance does not change with the size of the sample.

IamSugarBee

Atoms of hydrogen can become helium atoms during a chemical reaction.
True
False

Answers

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

Falsee

Can’t change into another.

how are protons and neutrons found?

Answers

Answer:

Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus. They group together in the center of the atom.

Explanation:

I'm not sure if this is correct but I hope this helps.

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