Answer:
Explanation:
Net ionic equations must be balanced by both mass and charge. Balancing by mass means ensuring that there are equal masses of each element on the product and reactant sides. Balancing by charge means making sure that the overall charge is the same on both sides of the equation.
What other organisms feed on the same material?
Answer:
A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other” and trophe for “nourishment.”
What’s the solution to this
The following data was collected when a reaction was performed experimentally in the laboratory. Reaction Data Reactants Products Fe2O3 Al Al2O3 Fe Starting Amount in Reaction 3 moles 5 moles ? ? Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount.
The maximum amount, in grams, of Fe that would be produced during the experiment, will be 280 grams
Sotichiometric calculationFrom the equation of the reaction:
[tex]Fe_2O_3 + 2Al -- > 2Fe + Al_2O_3[/tex]
The mole ratio of [tex]Fe_2O_3[/tex] to Al is 1:2.
But 3 moles and 5 moles of reactants respectively started the reaction. Thus, Al is limited in availability and will determine the amount of products that will be produced.
The mole ratio of Al and Fe is 1:1, therefore, a maximum of 5 moles of Fe will be produced from the reaction.
5 moles Fe = 5 x 56 = 280 grams
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Acids and bases are both what?
Answer:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
Answer:
Electrolytes
Explanation:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solutions. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
which of the following provide evidence of plate motion?
A. shapes of the continents
B. fossil s of the same species found on multiple continents
C. the age distribution of basalt at mid ocean ridges
D. the size of the continents
Answer:
The following evidences of plate motion are:
offset of rocks along the San Andres fault.
the age distribution of basalt at mid-ocean ridges.
the age distribution of the Hawaiian Islands
Based on the kinetic theory, which statement is true? (5 points)
O Matter consists of only large molecules.
Matter is made up of only charged particles.
The particles of matter have zero kinetic energy and potential energy.
O The particles of matter are arranged in different ways for the different states.
Answer:
the particles of matter are arranged in different ways for the different states
Explanation:
because solid liquid and gas all three matters have different states for example the particles in a solid are closely packEd and form of movement is vibration
What happens to the pressure and the molecules inside a unicycle tire that is being pumped up?
A. The pressure decreases, and the molecules slow down.
B. The pressure increases, and the molecules collide with the tire's inner surface.
C. The pressure increases, and the molecules slow down.
D. The pressure decreases, and the molecules collide with the tire's inner surface.
name the three crystalline forms of carbon
Answer:
Diamond.
Graphite.
Fullerene
Explanation:
these are three crystalline forms of carbon.
Question 2 of 32
Which best describes what happens during a typical energy conversion?
O A. Some energy is destroyed.
OB. Some energy is created.
C. The total amount of all forms of energy stays the same.
OD. Some mass changes into energy, and some energy changes into
mass.
A majority of your diet should be 1
vegetables and protein 2. vegetables and fats 3. fruits and vegetables 4. fruits and fats
Answer:
Veggie and proteins
Explanation:
At least based on US govt. recommendation we have to have more veggies and proteins and then fruits.
https://en.wikipedia.org/wiki/MyPlate
Answer:
C. fruits and vegetables
Explanation:
i got it correct on my test i hope you do too. have a good day
Question 8 (1 point)
A lead sinker is used in fishing to weight a fishing line down. If 149.4 J of heat energy
J
was added to a lead sinker with a mass of 50 g. What is the total temperature change
for the lead sinker? Assume the specific heat (c) of lead is 0.129 J/gºC.
888
Answer:
do u like fishing
Explanation:
because i do
Answer:
23.2 C
Explanation:
By looking at the dimension of specific heat ( J/g-C) , you can compute these type of questions:
149.4 J / ( .129 J / g-C * 50 g) = 23.2 C
(see how dimensions g and J cancel out and you are left with C ? )
What are the values ?
Gatorade
Which of the following is NOT a unit used to measure gas pressure? *
O liters (L)
Omillimeters of mercury (mmHg)
Oatmospheres (atm)
Okilopascals (kPa)
Answer:
liter
Explanation:
liter is the unit of liquid
Complete the chart on the characteristics of bonds
Answer:
Face value. Corporate bonds normally have a par value of $1,000, but this amount can be much greater for government bonds.
Interest. ...
Coupon or interest rate. ...
Maturity. ...
Issuers. ...
Rating agencies. ...
Tools and tips.
2KCIO3 -> 2KCI + 302
For the reaction shown here, calculate how many moles of reactants are needed to produce 96 grams of oxygen gas as a product.
A) 1
B) 2
C) 3
D) 4
Moles of oxygen
Given mass/molar mass96/323mol2 mol reactants required for 3mol O_2
So our answer is 2
What does the word transfer mean?
A. To move from one place to another
B. To block energy flow
C. To move for a new job
D. To move to a warmer place
Group of answer choices
Answer: i think its A.
Explanation: hope it helps :>
The drawing shows a chemical reaction between hydroxide and bromomethane to produce methanol and bromide ion. The middle drawing is the activated complex. The reaction is exothermic.
Which species has the lowest energy?
A
B
C
Item 4
Item 4
Answer:
C.
Explanation:
Exothermic means the energy of products is lower than energy of reactants. Transition state will always be the highest energy among the two.
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressure used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 kPa (60,000,000 Pa). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 5.17x10^8 Pa, what is it’s running pressure in torr?
a student wants to fry an egg in a 1,770 g iron skillet. an egg will become firm at 70 degrees Celsius. the specific heat capacity of iron is 0.444. if the skillet begins at room temperature of 25 degrees Celsius, what is the minimum amount of energy that must be transferred to the skillet in order to fry the egg.
What is the molarity of .200 L of solution in which 2.0 moles of sodium bromide is dissolved?
Answer:
it’s 10ml
Explanation:
200/2 = 10
In the wild, female and juvenile African elephants typically live in herds that vary in size, depending on the
environment. Juvenile African elephants are subject to predation by animals such as lions and leopards. When a
juvenile is threatened by a predator the members of the herd may form a protective circle around that individual
and the other juveniles.
Explain how herd behavior is beneficial to the survival of individual elephants and also beneficial to the survival of
the species. Enter your answer in the box provided.
Herd behavior in elephants ensures that individuals are protected and the species is perpetuated.
What is her behavior?It is a behavior that is characteristic of animals that form herds.
Herds generally refer to groups of animals that live or move together or both.
By protecting individual elephants that are weak or young from being preyed upon by lions and leopards, more members of the population survive.
When more members of the population survive, the species is perpetuated and the likelihood of going into extinction reduces.
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What state of matter is it ?
Answer:
aqueous
Explanation:
These three gases, Helium, Neon, and Argon all have one property in common because they are gases at room temperature. That is they:
They have no definite shape and no definite volume because they are gases.
How gases have no definite and volume?Gases have no definite shape and no definite volume because they are present in free state. Those substances that are close together and held tightly have definite shape and volume.
So we can conclude that they have no definite shape and no definite volume because they are gases.
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What are compounds?
O heterogeneous mixtures
O pure substances
O homogeneous mixtures
Compounds are pure substances the are composed of two or more elements chemically bonded. Compounds have a definite composition, so they are the same throughout, which makes them homogeneous.
Charle's Law
At 225 °C a gas has a
volume of 400 mL. What is
the volume of this gas at 127
°C?
Given:
Unknown:
Formula:
Solution:
Final answer:
Convert temperature to Kelvin
225°C=498K127°C=400KConvert vol to L
400mL=0.4LApply Charles law
V1T_2=V2T_10.4(400)=498V_2160=498V_2V_2=0.32L=320mLAnswer:
Given:[tex]V_{1} = \text{400.0 mL}[/tex]
[tex]T_{1} = 225.0^{\circ}\text{C + 273.15 = 498.15 K}[/tex]
[tex]T_{2} = 127.0^{\circ}\text{C + 273.15 = 400.15 K}[/tex]
Unknown:[tex]V_{2}[/tex]
Solution:[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
[tex]V_{2} = V_{1} \times \dfrac{T_{2}}{T_{1}}[/tex]
[tex]V_{2} = \text{400.0 mL} \times \dfrac{\text{400.15 K}}{\text{498.15 K}}[/tex]
[tex]\boxed{V_{2} = \text{321.3 mL}}[/tex]
Therefore, the volume of the gas at 127.0°C is 321.3 mL
[tex]\begin{gathered}\\\end{gathered}[/tex]
what are levers used for? (science)
According to the research, levers are used to modify or generate a force and transmit displacement.
What are levers?It is a simple machine composed of a rigid bar of some moderately resistant material, which rotates freely on a support point.
It can be used to maximize the mechanical force applied to an object, increasing its speed or the distance it travels, by applying a proportionally smaller amount of force.
Therefore, we can conclude that according to the research, levers are used to modify or generate a force and transmit displacement.
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Step 4: Summarize nuclear changes.
a) Use your completed table and models to write a summary that addresses the following questions:
1. How does energy change in these reactions? Is energy needed to start the reactions or is energy given off in the reactions? For each type of reaction, approximately how much
energy is released?
2. How do these energy changes compare in scale to other types of reactions, such as chemical reactions?
Nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.
What are nuclear changes?Nuclear changes are changes which occur in the nucleus of atoms of elements.
Nuclear changes involves radioactive decays to give radiation and energy spontaneously known as radioactivity.
In this type of nuclear change no energy is required to start the reaction but large amount of energy are released.
Nuclear changes can also involve splitting of large nucleus into smaller nucleus of atoms known as nuclear fission or the formation of larger nucleus from the combination of two or more smaller nuclei known as nuclear fusion.
Energy is required to start nuclear fission and fusion but the energy released is far greater.
When compared with energy changes in chemical reactions, the energy released in nuclear reactions is far greater.
Therefore, nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.
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Find the formula for the hydrate
0.737 g MgSO3 and 0.763 g H2O
The required formula of hydrate is MgSO₃.6H₂O.
How do we calculate the formula of hydrate?The number of moles of water per mole of anhydrous solid (x) will be computed by dividing the number of moles of water by the number of moles of anhydrous solid (x) to find the hydrate's formula.
Moles will be calculated as:
n = W/M, where
Moles of MgSO₃ = 0.737g / 104.3g/mol = 0.007mol
Moles of H₂O = 0.763g / 18g/mol = 0.04 mol
Number of H₂O molecule = 0.04/0.007 = 5.7 = 6
So formula of hydrate is MgSO₃.6H₂O.
Hence required formula of hydrate compound is MgSO₃.6H₂O.
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Pb+FeSO4⇒PbSO4+Fe is what kind of reaction?
Answer:
This is a displacement reaction.
Explanation:
The reaction where a part of the reactant is replaced by another reactant is defined as a displacement reaction. In this reaction, Fe of the reactant is displaced or replaced by another reactant Pb to form lead sulfate. So, this is an example of a displacement reaction.
How many moles of fluorine atoms are present in a sample that contains 4.14 moles of ?
SF4 mol
Answer:
The Avogadro number
One mole of atoms contains 6 x 10 23 atoms, no matter what element it is
Explanation:
