A scoop of potassium oxide was placed in
55g of water which produced 67g of
potassium hydroxide. What mass of
potassium oxide was used?

Answers

Answer 1

A scoop of potassium oxide was placed in 55g of water which produced 67g of potassium hydroxide then mass of potassium oxide was used is 12g

Potassium oxide is used widely in the agricultural industry as a fertilizer

Here given data is

Potassium oxide was placed in 55g of water which produced 67g of potassium hydroxide

We have to calculate mass of potassium oxide was used =?

Then the reaction is

K₂O + H₂O → KOH

x + 55g = 67g

x = 67g - 55g

x = 12g

Therefore mass of potassium oxide was used is 12g

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Related Questions

Minerals from water pass through the mold and over time the minerals fill that mold and it then becomes a cast in the same shape of the body of the animal that died?

True
False

Answers

B) False (Answer) I hope you get a good grade

Ms. Terries was given a beautiful deep red gem. She knew she might be holding a ruby. Or, she might be holding a stone worth more than rubies, a stone rared than diamonds – a red beryl. Ms. Terries needed to be careful in her calculations. Red Beryl is a mixture of minerals and its density can be anywhere from 2.63g/cm3 to 2.92 g/cm3 Rubies can also vary in density from 3.9 g/cm3 to 4.1 g/cm3. Ms. Terries weighed the stone. It weighed 4.35 g. When put into a graduated cylinder of water, the water level rose 1.5 mL. Determine the density of the gem. Was it ruby or red beryl?

Answers

Answer:

red beryl

Explanation:

Red Beryls = Density range is 2.63g/cm3 to 2.92 g/cm3

Rubies = Density Range is 3.9 g/cm3 to 4.1 g/cm3

Mass of stone = 4.35 g

Volume of solid = change in water level = 1.5 mL = 1 cm3

Relationship between mass, volume and density is given by;

Density = Mass / Volume

Density = 4.35 / 1.5 = 2.9 g/cm3

The density of the stone falls in the red beryls range hence it is a red beryl.

point Deshawn ran the 400 m race(in a straight line) in 2 minutes. What is his distance and displacement ? Explain your answer below in complete sentences.​

Answers

His distance and displacement are the same, which was 400 m

Further explanation

Given

Distance = 400 m

time = 2 min

Required

Distance and displacement

Solution

Distance is a scalar quantity that indicates the length of the trajectory that is traveled by an object within a certain interval. Distance has no direction, only has magnitude  

Can be simplified distance = totals traveled  

Displacement is a vector quantity that shows changes in the position of objects in a certain interval of time. Displacement has magnitude and direction  

Can be simplified displacement = distanced traveled from starting point to ending point  

From the definition above shows that the displacement and the distance that he traveled have the same value (magnitude), which is equal to 400 m

The value of the two will be different if he starts and finishes at the same point, then the displacement value is zero while the distance he has traveled is still 0

What do electric conducts and thermal conducts have in comman?

Answers

Usually electrical conductors have loosely bound electrons. Materials that conduct heat are thermal conductors

uses of hydrogen?.......​

Answers

Explanation:

Uses of hydrogen :

It can be used as rocket fuel. It can be used for welding It can be used for the production of hydrochloric acid.It can also be used to generate electricity.

Hope it Helps.

A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?
Question 4 options:

A Hot water heated the aluminum foil.

B The liquid solution changed color.

C The pan was lined with aluminum foil.

D The hot water cooled.

Answers

c. the pan was lined with aluminum foil

Answer:

c lined with aluminum foil

Haley is trying to pull an object upward. The below forces are acting on the object.

Fp= 5500 N
Fg= 6000 N

Which represents the net force?

← 500 N
→ 500 N
↑ 500 N
↓ 500 N

Answers

Explanation:

it's answer is last

hope it helps you

↓ 500 N  represents the net force as the force is acting in downward direction.

What is force?

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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Please help me answer Question 1.

Answers

Answer:

9 moles of oxygen are produced from 6 moles of potassium chlorate.

Explanation:

Given data:

Number of moles of KClO₃ = 6 mol

Number of moles of oxygen produced = ?

Solution:

Chemical equation:

2KClO₃       →    2KCl  + 3O₂

now we will compare the moles of KClO₃ and O₂.

                     KClO₃          :        O₂

                         2              :         3

                         6              :        3/2×6 = 9

Thus, 9 moles of oxygen are produced from 6 moles of potassium chlorate.

how many moles of tin are there in 50 g of tin (II) oxide

Answers

Answer:

Moles of tin = 0.37 mol

Explanation:

Given data:

Mass of tin oxide = 50 g

Moles of tin = ?

Solution:

Number of moles of SnO:

Number of moles = mass/molar mass

Number of moles = 50 g/ 134.71 g/mol

Number of moles = 0.37 mol

We can see there is only one mole of Sn is present in one mole of tin oxide.

Thus in 0.37 mol  of tin oxide,

0.37 mol × 1 = 0.37 mol of tin

The structures of three hydrocarbons are given below : a. They have same physical properties. B.They have same structural formula. c.They have same general formula. D.They are isomers of each other.

Answers

Answer:

The correct answer is option C "They have same general formula"

Explanation:

Hydrocarbons are any of a class of natural substance intensifies made distinctly out of the components carbon (C) and hydrogen (H). The carbon particles consolidate to shape the structure of the compound, and the hydrogen molecules append to them in various arrangements.

Hydrocarbons are the chief constituents of oil and gaseous petrol. They fill in as powers and ointments just as crude materials for the creation of plastics, strands, rubbers, solvents, explosives, and modern chemical substances.

All of the compounds given are alkanes and they have the same general formula which is represented by CnH2n+2, where ‘n’ is the number of carbon atoms.

Is silver a metal or non-metal

Answers

Answer:

metal

Explanation:

What is the name of the particle made up of 2 protons and 2 neutrons?

Answers

Answer: It’s called a alpha particle

Explanation:

Which of the following statements is correct?
Group of answer choices

Water and nitrogen are both compounds.

Water and nitrogen are both elements.

Water is an element and nitrogen is a compound.

Water is a compound and nitrogen is an element.

Answers

Answer:

water is a compound and nitrogen is an element

Explanation:

water is a compound and also a molecule because it is a combination of two different element, while nitrogen is an atom or an element

Answer:  Water is a compound and nitrogen is an element.

Explanation:

Water = H20 = 2 Hydrogen atoms and 1 Oxygen atom

Nitrogen (N) element of Group 15 of the periodic table

What does supersaturated mean?
A.The solvent is holding as much solute as it can
B.The solvent can hold more solute
C.There is more solute than the solvent can hold

Answers

Explanation:

There is more solute than the solvent can hold (C).

the Central value of the set of observation is called.​

Answers

Answer:

The central value of the sets of observation can be mean, median or mode depending upon the kind of data provided as all are measure of central tendency.

Explanation:

In the ground state, all of the atoms of Period 3 elements have the same

Answers

Answer:

Shell number

Explanation:

a compound contains 64g of O and 8g of H. what is the empirical formula for this compound

Answers

Explanation:

Moles of Oxygen = 64/16 = 4

Moles of Hydrogen = 8/1 = 8

Hence the empirical formula is H2O.

How many grams of carbon are required to produce 0.460 moles of SiC?
SiO2 + C → SiC + CO

Answers

Answer:

Sick Core corona +iep =Qurintine

True or false: an amplifier can adjust the amplitude

Answers

Answer:

ᴛʀᴜᴇ..

...............

Which sentence is a scientific statement?

A.
There is a substance around us that cannot be detected.
B.
Kids should go to school for 12 years.
C.
Experimentation is the best way to obtain knowledge.
D.
Unicorns once existed on Earth.
E.
There are no living things on the Moon.

Answers

B. Kids should go to school for 12 years.

What is a scientific statement?

Scientific statements are those statements that must be falsifiable which means that able to be proven false while on the other hand, tautology is a statement that is true. The sun revolves around the earth” is an example of scientific statement because this statement can be falsifiable in the light of evidences and researches. Hypothesis is a statement that may be true or false. We can verify it by doing experiments.

So we can conclude that option B is the sentence that represents a scientific statement.

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A 100 gram sample of naturally occurring boron contains 19.78 % of B-10 and 80.22 % of B-11. Which numerical setup can be used to determine the atomic mass of naturally occurring B

Answers

Answer:

The required numerical set up is;

RAM = (19.78% * 10) + (80.22% * 11)

Explanation:

The relative atomic mass is the sum of the products of the mass of each isotope and its relative abundance.

Hence the relative atomic mass of Boron is obtained form;

RAM = (19.78% * 10) + (80.22% * 11)

RAM = (1.978) + (8.8242)

RAM =10.8022

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Answers

Answer is:

either A, or D

Explanation:

This substance consists of two or more different elements chemically combined

Answers

The substance would be referred to as a compound substance.

Hey please answer this thanks.

Answers

Explanation:

Percentage composition of oxygen = (80/134) * 100% = 59.7%.

Which of the following changes would double the force between two charged particles

Answers

Answer:

Decreasing the distance between the particles by a factor of 2

Explanation:

To double the force between the two charge particles, the distance between the particles should be reduced by a factor of two.

According to coulombs law "force is directly proportional to the potential between the two charges and inversely proportional to the square of their distances".

       F  = [tex]\frac{kq_{1} q_{2} }{r^{2} }[/tex]

F is the electric force

k is the coulomb constant

q is the charge

r is the distance or separation

As the separation between the charges is reduced the force increases and vice versa

Answer:

A

Explanation:

A. P. E. X.

What is the standard unit of measurement for length ?

A Mile
B Centimeter
C Meter
D Yard

Answers

Answer:

meter

have a nice holiday

Answer:

The Meter

Explanation:

In the metric system, the meter is the standard measurement of length.

Hope it helped!

why is ketchup a physical change

Answers

Answer:

Ketchup is not a change, it is a sauce.

Explanation:

Answer:

There is no change in the tomatos structure its "state of matter" you could say is changed, but the actual chemical compoud is the same.

HELP!!!
find the balanced equation​

Answers

Answer:

3Fe²⁺ + Cl₂ ⇒ 2Fe³⁺ + 2Cl⁻

Explanation:

manipulate the problem to match charges and have the same amount of reactants and products on both sides.

Which two statements are true about redox reactions?
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
C. They are double-replacement reactions.
D. They are acid-base reactions,

Answers

Answer:

A. They include both oxidation and reduction reactions AND B. Electrons are transferred.

Explanation:

a p e x

The statements that are true about redox reaction are:

A. They include both oxidation and reduction reactions,

B. Electrons are transferred.

What is a redox reaction?

The Redox reaction is the one in which oxidation and reduction take place simultaneously. In this process transfer of electrons takes place which further leads to oxidation or reduction.

Thus, options A and B are correct.

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Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flowers producing pea plants together over six generations. The results of Ralph's artificial selection are shown above. What did artificial selection do the population of pea plants?

Answers

Answer:

B

Explanation:

Number of purple flowers

Number of white flowers

1

705

224

2

792

189

3

834

102

4

889

84

5

938

21

6

952

0

Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flower producing pea plants together over six generations. The results of Ralph's selective breeding are shown above. What did the selective breeding do to the population of pea plants?

A. increased its genetic diversity

B. decreased its genetic diversity

C. caused a new species of pea plant to form

D. caused a pea plant to exhibit a new characteristic

The correct answer would be that selective breeding decreased the genetic diversity of the population of the pea plants.

The genetic diversity of a population can be viewed as the number of genes in the gene pool of the population.

With each successive generation, more purple-flowered and less white-flowered pea plants were being produced until the 6th generation when only purple-flowered pea plants were produced. The ratio of the purple color gene to that of white color kept increasing until there was no longer a white color gene in the population. Hence, the genetic diversity of the population was decreased by the selective breeding.

The correct option is B

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(LO 7) The Gardner Company expects sales for October of $238,000. Experience suggests that 45% of sales are for cash and 55% are on credit. The company collects 50% of its credit sales in the month of sale and 50% in the month following sale. Budgeted Accounts Receivable on September 30 is $62,000. What is the amount of Accounted Receivables on the October 31 budgeted balance sheet? Jean has created a self improvement plan so she can meet her goal of getting a raise in six months. 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The sailors sang strange songs as they pulled upon the ropes; and I learned these songs by heart. And I would sit on the river-wall with my feet dangling over the water and sing with the men, pretending to myself that I too was a sailor.For I longed always to sail away with those brave ships when they turned their backs on Puddleby Church and went creeping down the river again, across the wide lonely marshes to the sea. I longed to go with them out into the world to seek my fortune in foreign landsAfrica, India, China and Peru! When they got round the bend in the river and the water was hidden from view, you could still see their huge brown sails towering over the roofs of the town, moving onward slowlylike some gentle giants that walked among the houses without noise. What strange things would they have seen, I wondered, when next they came back to anchor at Kingsbridge! And, dreaming of the lands I had never seen, I'd sit on there, watching till they were out of sight.Which phrase from the excerpt most clearly suggests what Tommy thinks a life at sea will bring? The sailors sang strange songs as they pulled upon the ropes Moving onward slowlylike some gentle giants What strange things would they have seen They came back to anchor at Kingsbridge Ergnze die Stze mit wenn:- Hilfe brauchen- es regnet- ins Schwimmbad gehen- krank sein1. Wenn sie __________, dann darf Sofie nicht zum Casting gehen.2. Wenn__________, dann knnen wir leider nicht zu dem Open-Air-Konzert gehen.3. Wenn___________, dann kannst du mich anrufen.4. Wenn__________, dann kannst du das neue Handtuch mitnehmen. Which type of interest is charged on both the original amount borrowed andthe interest that has already accumulated?A. Corporate interestB. Bankruptcy interestC. Simple interestD. Compound interest Carey needs $60 to buy her mothers a gift. 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This quadratic equation represents themodel for the set of data.y = 0.00412 - 0.3141 +7.5Based on the model, approximately how much time does an 18-year-old spend watching television each day?A. 2 hours B. 0.5 hour C. 7.5 hours D. 3 hours Bad Brad's BBQ had cash flows for the year as follows ($ in millions): CASH RECEIVED FROM: Customers $ 3,100 Interest on investments 220 Sale of land 110 Sale of common stock 550 Issuance of debt securities 2,500 CASH PAID FOR: Interest on debt $ 320 Income tax 150 Debt principal reduction 1,450 Purchase of equipment 4,400 Purchase of inventory 900 Dividends on common stock 190 Operating expenses 800 Bad Brad's would report net cash inflows (outflows) from financing activities in the amount of: Multiple Choice $1,520. $(1,520). $1,260. $1,410.