There are ____ g of potassium in 2.100 moles of potassium phosphate.
WILL GIVE BRAINLIEST!!
Answers
There are 9.24 grams of potassium in 2,100 moles of potassium phosphate
Related Questions
(a) What is meant by the term equilibrium for a reversible reaction?
Answers
Answer:
it means that the two opposing reactions run on equal rates hence there is no net change
it means that the two opp2r
water is formed from the reaction of an acid and a base. why is it not classified as a salt? A salt is an ionic compound, whereas water is a covalent compound.
Answers
The number of ionic bond is zero. Water is not classified as a salt because it is not an ionic compound.
Salts are typically defined as ionic compounds that are formed by the reaction of an acid and a base. In this type of reaction, the acid donates a hydrogen ion (H+) to the base, which accepts it to form a positively charged ion (cation) and a negatively charged ion (anion).
These ions are then attracted to each other and form an ionic bond, resulting in the formation of salt but in this case, the H and O bond is covalent i.e the electron is not donated but shared between hydrogen and oxygen atoms
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Which of the following best describes the behavior of nonconservative elements in seawater?
A. Nonconservative elements are reactive in seawater and have a long residence time.
B. Nonconservative elements are reactive in seawater and have a short residence time.
C. Nonconservative elements are non-reactive in seawater and have a short residence time.
D. Nonconservative elements are non-reactive in seawater and have a long residence time.
Answers
Answer: B. Nonconservative elements are reactive in seawater and have a short residence time.
Explanation: The non-conservative elements of seawater possess two paramount properties which include being chemically or biologically reactive as they are usually dependent on seasonal or short geological cycles. They also posses short residence time, which is the measure of the average time a dissolved substance spends in seawater. They also have varying concentration Ober time. Examples of nonconservative elements include; Iron and Carbon.
ASAAAP HURRRY PLS!!!
Where in aerobic respiration is the largest amount of energy produced?
A)
At the beginning of the cycle, when glucose is oxidized to pyruvate.
B)
At the end of the electron transport chain, when oxygen is reduced.
C)
At the end of the electron-transport chain, when oxygen is oxidized.
D)
At the beginning of the electron transport chain, when oxygen is oxidized.
Answers
when do you use the roman numerals when naming ionic compounds
Answers
Oxidation State
In chemistry, when naming ionic compounds there will sometimes be a roman numeral after the first element. This number represents the oxidation state of the element. An oxidation state is defined as the hypothetical charge of an atom, assuming that all of its bonds are fully ionic. In other words, the oxidation state shows how many electrons an atom gives or receives after ionization.
In ionic compounds, there will only ever be a roman numeral after the first element. This element will always be the cation (positively charged ion). So, the roman numeral will show how many electrons each cation gave.
When Roman Numerals are Necessary
This is necessary when you deal with transition metals or any other element that has multiple oxidation states. For example, iron can give 2 or 3 electrons. So, when naming a compound with iron you need to use a (II) or (III) to show how many electrons each iron atom gave.
When Roman Numerals are Unnecessary
On the other hand, roman numerals are unnecessary when using an element that only has one possible oxidation state. For example, Na can only give 1 electron ever, so it does not need a roman numeral. Additionally, elements in the second group like Mg can only ever give 2 electrons, so they also don't need a roman numeral to follow their name.
Observe: Look at the red lithium atom and the blue oxygen atom. Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)
How many electrons will the lithium atom give up to become stable?
1. eight
2. seven
3. two
4. one
Answers
Answer:
4. one
Explanation:
1. On a train ride cross-country, the trees, buildings, and people appear to be speeding by the window. This is because the train is our _____
2. Scientists use the ______
system for making measurements.
3. Physical science studies the relationships between ____,____,
and ______.
4. If 6.6 tyrannosaurs weigh 30,000 kg, then what does one tyrannosaur weigh?
5. For most activities, the ___
makes a handy frame of reference.
Answers
On a train ride cross-country, the trees, buildings, and people appear to be speeding by the window. This is because the train is moving in the forward direction.
Scientists use the shared system for making measurements. This system is also called system of international.
Physical science studies the relationships between natural but non-living objects. Physical science is ordinarily thought of as consisting of four broad areas: astronomy, physics, chemistry, and the Earth sciences.
If 6.6 tyrannosaurs weigh 30,000 kg, then one tyrannosaur weigh about 4545 kg. For most activities, the earth makes a handy frame of reference.
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How much heat (in kj) is needed to convert 514 g fe2o3 into pure iron in the presence of excess carbon?
Answers
Heat is required to convert fe2o3 into pure iron. Heat required to convert 514 g fe2o3 into pure iron in the presence of excess carbon for is 753.02kJ.
What is heat?Heat is amount of energy that is transmitted because of a change in temperature from one structure to its surroundings. Heat is transition from one medium or object to another of kinetic energy, or from an energy source to a medium or object. This is amount of heat needed to increase the temperature by one degree Fahrenheit of a pound of pure liquid water.
Heat is source of energy that is transmitted (flowing from the high temperature system to the low temperature system) between systems or objects of different temperatures. It is also known as the thermal energy or heat energy. The heat is typically measured in Btu, calories or joules.
The Heat of Reaction (also known and Enthalpy of Reaction) is change in the enthalpy of a chemical reaction that occurs at a constant pressure. It is a thermodynamic unit of measurement useful for calculating amount of energy per mole either released or produced in a reaction. Since enthalpy is derived from the pressure, volume, and internal energy, all of which are state functions, enthalpy is also a state function.
2Fe2O3 (s) + 3C (s) ⇒ 4Fe (l) + 3CO2 (g)
ΔH°= +467.9kJ
Using the unitary method,
2 moles of Fe2O3 requires = 467.9kJ heat
2* 159.69g Fe2O3= 467.9kJ heat
319.38g Fe2O3 requires = 467.9 kJ heat
hence, heat required for for 514g of Fe2O3 = \(\frac{514}{319.38}*467.9kJ\)
heat required for 541g Fe2O3 = 753.02kJ
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Classify each element as a metal, nonmetal, or semimetal. Drag the appropriate items to their respective bins. Si, F, Fe, Al, Ne
Answers
The given elements, Si, F, Fe, Al, and Ne can be classified as metals, nonmetals, and semimetals as follows:
Si is a semimetal. F is a nonmetal. Fe is a metal. Al is a metal. Ne is a nonmetal.
Metallic elements are those that have a shiny luster, are malleable and ductile, are good conductors of heat and electricity, and have high melting and boiling points.
Nonmetallic elements are those that do not have a shiny luster, are brittle and non-malleable, are poor conductors of heat and electricity, and have low melting and boiling points.
Semimetal elements have properties of both metals and nonmetals, including intermediate electrical conductivity, intermediate thermal conductivity, and are brittle like nonmetals. They may also have metallic luster, but their properties are not as characteristic as those of true metals and nonmetals.
In conclusion, Si is a semimetal, F and Ne are nonmetals, Fe and Al are metals.
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A student creates a model of a closed ecosystem by filling a glass tank half
full with water, then adding 10 snails and two small aquatic plants. The next
day, all the snails are dead. What is the most likely cause of their death?
A. The rates of cellular respiration and photosynthesis in the tank
were both too high.
B. The rates of cellular respiration and photosynthesis in the tank
were both too low.
O C. The rate of cellular respiration in the tank was much higher than
the rate of photosynthesis.
D. The rate of photosynthesis in the tank was much higher than the
rate of cellular respiration.
SUBMIT
e
PREVIOUS
Answers
Answer:
C. The rate of cellular respiration in the tank was much higher than
the rate of photosynthesis
Explanation:
In nature, cellular respiration and photosynthesis are opposite metabolic reactions. Cellular respiration, which is the process of releasing energy, requires oxygen while photosynthesis, which is the process of manufacturing foods by green plants, releases oxygen into the atmosphere. The two equations are as follows:
Photosynthesis:
6CO2 + 6H2O → C6H1206 + 6O2 (oxygen released)
Respiration:
C6H1206 + 6O2 (oxygen used) → 6CO2 + 6H2O
According to this question, 10 snails and two small aquatic plants were added to a closed glass tank half full with water. It was observed that all the snails died. This is most likely due to the fact that the rate of cellular respiration in the tank was much higher than the rate of photosynthesis.
In other words, the usage of oxygen via cellular respiration was much higher than the release of oxygen via photosynthesis.
Answer:
1. Snails carry out respiration only
2. Aquatic plants carry out both respiration and photosynthesis Although the aquatic plants can absorb carbon dioxide and release oxygen through photosynthesis, the amount of snail is much more than that of the aquatic plants.
During night time,the absence of light prevent the plants from carrying out photosynthesis. No oxygen is released at this time. There is a net release of carbon dioxide in the closed system and hence the snail died of suffocation.
Write the formula for the conjugate base of each acid.
Answers
The conjugate base of an acid can be formed by removing a proton (H+) from the acid molecule. The formula for the conjugate base of an acid is determined by the acid's molecular formula.
For example, the conjugate base of hydrochloric acid (HCl) is chloride ion (Cl-), which can be represented by the formula Cl-. The conjugate base of acetic acid (CH3COOH) is acetate ion (CH3COO-), which can be represented by the formula CH3COO-. Similarly, the conjugate base of sulfuric acid (H2SO4) is sulfate ion (SO42-), which can be represented by the formula SO42-. In general, the formula for the conjugate base of an acid is the acid's formula with the loss of a proton (H+).
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Which molecule is shown below
Answers
Answer:
A
Explanation:
You can see the top part looks kinda like methane, and the bottom part looks like hexane.
Answer:
A is correctvia A P E x
Explanation:
The closest star to our Sun is Proxima
Centauri, which is 4.242 light years away.
What is the distance to Proxima Centauri in
kilometers?
Answers
Answer:
Distance in kilometre = 4.242 x 10¹² km
Explanation:
Given:
Distance of Proxima Centauri = 4.242 light years
Find:
Distance in kilometre
Computation:
1 light year = 10,000,000,000,000 km
So,
4.242 light years = 4.242 x 10,000,000,000,000
Distance in kilometre = 4.242 x 10¹² km
three students are asked to discuss the percent error obtained from this lab and explain some sources of error that would account for the discrepancy seen, if any. which student employs correct scientific reasoning?student 1: if the reaction was not allowed to go to completion, the sodium bicarbonate would not have fully decomposed, making the final mass higher than the theoritical. student 2: if th baking soda was not heated long enough, the mass of solid product would be lowstudent 3: the student didnt weight the masses correctly therefore human error is the main source of discrepancya. student 3b. student 1c. student 2
Answers
Students who use correct scientific reasoning are Student 1 namely: If the reaction is not allowed to finish, the sodium bicarbonate will not decompose completely, making the final mass higher than the theory.Te corrct amswer is B.
If the sodium bicarbonate is not properly broken down, water and carbon monoxide will not be produced, which can be eliminated to lessen the product's mass. The product will therefore weigh heavier or have a bigger ultimate mass than predicted because of an incomplete reaction.
Given the aforementioned justifications, it is obvious that Student 2 is mistaken in this instance. This is not a scientific explanation in the instance of Student 3 and is merely a wild guess that isn't true in all circumstances.
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When might Accurate length measurement be important?
Answers
Answer:
When you are going to measure small lengths or objects or when you are going to measure things with great accuracy.
Explanation:
Two-thirds of a bone's weight is composed of calcium phosphate which interacts with calcium hydroxide to form crystals of __________.
Answers
Two-thirds of a bone's weight is composed of calcium phosphate which interacts with calcium hydroxide to form crystals of hydroxyapatite
The two component of bones are 33% organic matter and 67% inorganic matter( Calcium phosphate and hydroxyapatite crystal).Calcium phosphate make up almost 2/3 of the bone's weight.Collagen fibers make up almost 1/3 of the bone's weight.The calcium phosphate interacts with calcium hydroxide to form crystals of hydroxyapatite, whose molecular formula is \(Ca_{10} (PO_{4} )_{6} (OH)_{2}\)
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Compare and contrast the elements Potassium, K, and Neon, Ne. Use at least ten comparisons or descriptions.
I need this done asap!!!
Answers
Answer:
K is a group 1 element while Ne is a group 0 element
K is a good reducing agent while Ne is inert
K is metal while Ne is a gas
K has one valence electron while Ne has no valence electron
Explanation:
What is the name of this ??
Answers
Answer:
Explanation:
Your answer is C
The composition of a given pure compound is always no matter what the source of the compound?
Answers
The composition of a given pure compound is always the same no matter what the source of the compound.
A compound seems to be a substance that is entirely made of one kind of molecule.
Every component of compounds shares the same traits and features because of their homogenous makeup. However, because mixtures are composed of several sorts of chemicals, they frequently differ in terms of content, qualities, and samples.
Therefore, the composition of a given pure compound is always the same no matter what the source of the compound.
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Which element would be the most suitable to make a spoon that will melt in
your hot drinks?
A) aluminium
melting point: 660°C
boiling point: 2470°C
B) argon
melting point: -189°C
boiling point:-186°C
C) bromine
melting point: -7°C
boiling point: 59°C
D) gallium
melting point: 30°C
boiling point: 2400°C
E) lithium
melting point: 180°C
boiling point: 1330°C
F)mercury
melting point: -39°C
boiling point:357°C
Answers
Answer:
it's A) or E)
others are not suitable cuz their melting point is weak.
Answer:
Gallium
Explanation:
Because the melting point is low and the drinks are usually around 60-70 degrees Celsius so it wil melt
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:
How many joules of heat are needed to raise the temperature of 15.0 g of
iron from 11°C to 66°C, if the specific heat of iron is 0.45 J/g°C?
Answers
371.25 joules of heat energy are needed to raise the temperature of 15.0 g of iron from 11°C to 66°C.
To solve this problemThe following formula can be used to determine the amount of heat energy needed to raise a substance's temperature:
Q = m * c * ΔT
Where
The heat energy in joules is QThe substance's mass, m, is expressed in gramsc is a substance's specific heat capacity expressed in J/g°CΔT is the change in temperature in degrees CelsiusGiven the following values:
m = 15.0 g (mass of iron)
c = 0.45 J/g°C (specific heat of iron)
ΔT = 66°C - 11°C = 55°C (change in temperature)
Plugging these values into the formula, we can calculate the heat energy (Q):
Q = 15.0 g * 0.45 J/g°C * 55°C
Q = 371.25 J
Therefore, 371.25 joules of heat energy are needed to raise the temperature of 15.0 g of iron from 11°C to 66°C.
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to what volume should you dilute 135 ml of an 8.15 m cucl2 solution so that 48.5 ml of the diluted solution contains 4.86 g cucl2 ?
Answers
The required volume of the solution to be diluted is 4.42 ml so that 48.5 ml of the diluted solution contains 4.86 g CuCl2.
To determine the required volume of the solution to be diluted so that 48.5 ml of the diluted solution contains 4.86 g CuCl2, the volume of the solution can be calculated as follows: First, calculate the number of moles of CuCl2 in the 48.5 ml of the diluted solution. Using the equation: moles = mass / molar mass we get: moles of CuCl2 = 4.86 g / 134.45 g/mol = 0.036 moles CuCl2.
Now, the number of moles of CuCl2 in the original solution can be calculated using the formula: moles = molarity x volume
Therefore,0.036 moles = 8.15 M x VV = 0.00442 L = 4.42 ml
Hence, the required volume of the solution to be diluted is 4.42 ml.
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the___is the middle layer of earths atmosphere
Answers
Answer:
mesosphere
Explanation:
can someone label these?
1. Label
A. sediment
B. weathering & erosion
C. sedimentary rock
D. Igneous rock
E. Melting
2. label
A. Sediment
B.weathering & erosion
C. Sedimentary rock
D. Igneous rock
E. Melting
3. Label
A. Sediment
B.weathering & erosion
C. Sedimentary rock
D. Igneous rock
E. Melting
4. Label
A. Weathering & erosion
B. Sedimentary rock
C. Igneous rock
D.Melting
E. Heat &pressure
5. Label
A. Weathering & erosion
B. Sedimentary rock
C. Igneous rock
D.Melting
E. Heat &pressure
6. Label
A. Weathering & erosion
B. Sedimentary rock
C. Igneous rock
D.Melting
E. Heat &pressure
Answers
2. Weathering & erosion
3. Sediments
4. Sedimentary rock
5. Melting
6. Heat & pressure
Hope this is helpful
what is single and double displacement reaction?
Answers
\({{\boxed{\mathcal{\red{It \: will \: be \: in \: your\: \: text \: book \: see}}}}}\)
Pls help me I don’t know how to do this
Answers
Explanation:
We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.
Calcium hydroxide = Ca(OH)₂
molar mass of Ca = 40.08 g/mol
molar mass of O = 16.00 g/mol
molar mass of H = 1.01 g/mol
molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol
molar mass of Ca(OH)₂ = 74.10 g/mol
mass of Ca(OH)₂ = 63.9 g
moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)
moles of Ca(OH)₂ = 0.862 moles
In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.
1 mol of Ca(OH)₂ = 2 moles of O atoms
moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂
moles of O atoms = 1.724 moles
One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.
1 mol of O atoms = 6.022 * 10^23 atoms
n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol
n° of O atoms = 1.04 * 10^24 atoms
Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.
calculate the temp. (in kelvin) of a 1.50 mol of a sample of a gas 1.25 atm and a volume of 14 L
Answers
The temperature (in kelvin) of a 1.50 mol of a sample of a gas 1.25 atm and a volume of 14 L is 142.1 K
The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as
PV = nRT
where,
P = Pressure
V = Volume
T = Temperature
n = number of moles
Given,
number of moles = 1.5 moles
pressure = 1.25 atm
volume = 14 L
PV = nRT
1.25 × 14 = 1.5 × 0.0821 × T
T = 142.1 K
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What happens to the light energy that is trapped by the chloroplast during the first stage of photosynthesis?
a.
Light energy is converted into chemical energy
c.
Light energy is converted into thermal energy
b.
Light energy is converted into kinetic energy
d.
Light energy remains the same
Answers
The statement light energy is converted into chemical energy correctly describes what happens to the light energy that is trapped by the chloroplast during the first stage of photosynthesis (option a).
What is the process of photosynthesis?The process of photosynthesis can be defined as all metabolic pathways associated with the generation of chemical energy in the form of simple carbs such as glucose by using sunlight and carbon dioxide.
Therefore, with this data, we can see that the process of photosynthesis produces chemical energy in the covalent bonds of food molecules.
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Which statement best describes a chemical reaction in which energy is released?
Answers
The chemical reaction in which energy is released is referred to as an Exothermic reaction.
What is an Exothermic reaction?This is the type of reaction in which the overall standard enthalpy change is negative.
This is however as a result of the energy being released when a chemical reaction takes place under certain conditions.
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