Answer:
A. The heat needed to raise the temperature of 1 g of a substance 1°C.
Explanation:
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Which of the following is a true statement regarding living organisms? All living things- (A. Require oxygen to breath)
(B. Are capable of intelligent thought)
(C.are made up of one or more cells)
(D.have a lifespan of at least on weak?
Answer:
A or C
Explanation:
Answer:
are made up of one or more cells
Explanation:
A cell is the building block of life of any organism. Therefore, an organism simply cannot exist if it has no cells
Would a burning candle have potential or kinetic energy?
Answer:
When the candle is lit and burning, it has kinetic energy.
Explanation:
please smash brainliest on my doorstep
which of the following systems of equilibrium is not affected?
Answer:
The first one
Explanation:
Both the products and reactants in the first equation have the same number of moles and will not be affected by a change in volume.
Aluminum chloride, AlCl3, is an inexpensive reagent used in many industrial processes. It is made by treating scrap aluminum with chlorine according to the following equation. Please balance the equation.
__2_ Al (s) + 3___ Cl2(g) _2___ AlCl3(s)
If you start with 3.11 g of Al and 5.32 g of Cl2, which reagent is limiting? How many grams of AlCl3 can be produced? During an experiment you obtained 5.57 g of AlCl3, what was your percent yield?
Answer:
Cl₂ the limiting reactant.
6.67g of AlCl₃ can be produced.
83.5% is percent yield
Explanation:
Based on the reaction:
2 Al + 3Cl₂ → 2AlCl₃
2 moles of aluminium react with 3 moles of chlorine.
To solve this question we must find the moles of each reactant in order to find limiting reactant. With limiting reactant we can find theoretical yield. Percent yield is:
Actual yield (5.57g) / Theoretical yield * 100
That means if we find theoretical yield we can find percent yield:
Moles Aluminium: 26.98g/mol
3.11g * (1mol / 26.98g) = 0.115 moles Al
Moles Chlorine: 70.90g/mol
5.32g * (1mol / 70.90g) = 0.075 moles Cl₂
For a complete reaction of 0.075 moles of Cl₂ are required:
0.075 moles Cl₂ * (2mol Al / 3mol Cl₂) = 0.050 moles of Al
As there are 0.115 moles of Al, Aluminium is the excess reactant and Cl₂ the limiting reactant.
Moles AlCl₃ and mass: 133.34g/mol
0.075 moles Cl₂ * (2mol AlCl₃ / 3mol Cl₂) = 0.050 moles of AlCl₃
0.050 moles of AlCl₃ * (133.34g / mol) =
6.67g of AlCl₃ can be producedPercent yield:
5.57g / 6.67g * 100 =
83.5% is percent yieldIn the number 48.93, which digit is estimated?
In the number 48.93, the digit that is estimated is the digit "9."
In the number 48.93, the digit "9" is estimated because it falls after the decimal point. When a decimal number, the digits to the right of the decimal point represent fractional or decimal values.
These digits can be estimated or rounded to a certain degree of accuracy, depending on the context or the desired level of precision.
The digit "9" is the last digit after the decimal point, it is likely an estimated value. It means that the actual value could be slightly higher or lower than 9, depending on the level of precision required.
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Help please!!!!!!!!!!!!
Answering so you can give the other person brainliest!
Consider this reaction: HCO3− + H2S → H2CO3 + HS− Which is the Bronsted-Lowry base? H2S HCO3- HS– H2CO3
Answer:
hco3
Explanation: bc i said so
how much 0.100 m h2so4 are needed to make 25.0 ml of 0.00500 m solution
Answer:
3) 1.25
Explanation:
I had the same question and somehow got it right :)
The new volume will be determined by molarity and which will be 1.25 ml.
What is volume?The volume of an object is just a measurement of how much space it takes up.
What is Molarity?
The molality refers to the moles of a solute in relation to the mass of the solvent, whereas the molarity refers to the moles of a solute in based on the volume of the solution. It can be denoted by M.
The formula of Molarity is
[tex]M_{1} V_{1} =M_{2}V_{2}[/tex]
where, M is molarity and V is volume.
Calculation of volume.
It is given that,[tex]M_{1} = 0.1 M, M_{2} =0.0025 M.[/tex]
Now, puts the value of given data in molarity equation.
[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]
[tex]V_{1} = M_{2} V_{2} /M_{1}[/tex]
[tex]V_{1}[/tex] = 0.005×25/0.1 = 1.25 ml
Therefore, the correct answer will be option 3.
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The students in Mrs. Smith's class used pH paper to measure the acidity levels between different samples of breakfast drinks. The pH
measurements ranged from 3.27 to 3.88 on the pH scale. Based on this range, we can determine that the most acidic solution had a pH of:
Answer:
The most acidic solution had a pH of 3.27.
Explanation:
In order to solve this problem we need to keep in mind that the lower the pH of a solution is, the more acidic the solution is.
If among the pH readings across the measured breakfast drinks, the lowest one was 3.27 (as the problem tells us with the range), then that drink was the most acidic one.
Conversely, the least acidic one had a pH of 3.88.
What is indicated by the prop- prefix?
Answer:
The molecule has 3 carbon atoms.
Explanation:
Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called
a. alkanes.
b. alkynes.
c. alkenes.
d. aromatic hydrocarbons.
Answer:
Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called
a. alkanes.
What is a magnet?(2 points)
O A tool used to help determine if certain materials are magnetic
O A tool used to help determine if certain materials have a large mass
O A tool used to help determine if materials are the color blue
O A tool used to help determine if materials use the force of gravity
draw the structure of ethoxyethane
Answer:
i couldnt draw it but here is a picture
Explanation:
Which of the following is common to both nuclear fusion and nuclear fission? PLZ I NEED ANSWER quickly
1.The fuel must be in the plasma state
2.A chain reaction is needed to start the reaction
3.Matter is converted into energy
4.Temperatures over one million degrees Celsius are needed for the reaction to occur
Answer:
I think number4.Nuclear fusion reaction is not possible in earth
Nuclear fusion and nuclear fission both have common to temperatures over one million degrees Celsius are needed for the reaction to occur. Therefore, option 4 is correct.
What is nuclear fusion ?A reaction known as nuclear fusion occurs when two or more atomic nuclei fuse to create new atomic and subatomic particles. Energy is released or absorbed depending on how much mass there is between the reactants and products.
Nuclear reactions that involve fusion and fission both yield enormous quantities of energy that can be used to generate power.
The two heavy isotopes of hydrogen, deuterium and tritium, are the primary fuels used in nuclear fusion. Only 0.0153% of natural hydrogen is deuterium, which may be easily and cheaply produced from seawater. Lithium, which is also widely distributed in nature, can be used to create tritium.
Thus, option 4 is correct.
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A gas occupies 40.0 mL at 150 K. What volume does it occupy at 300 K,
assuming pressure is constant? *
Answer:
.08 L or 80 ml
Explanation:
Use the equation V/t = V/t.
.04L / 150K = V / 300K
.04 / 150 * 300 = V
.08 L or 80 ml
A sample of carbon atoms were chemically combined with a sample of oxygen atoms to yield the compound carbon dioxide. The sample of oxygen atoms was artificially manufactured to have a 3:1 ratio of
Answer:
The law companies that value excessive ethics comply with the legal guidelines
How could renewable energy sources be used to heat and cool a house?
Pcl3+H2O=H3PO3+Hcl=?
Answer:
PCl3 + 3H2O → HPO(OH)2 + 3HCl. Phosphorus(III) chloride react with water to produce phosphorous acid and hydrogen chloride.
Explanation:
Answer:
the answer is stop studying,enjoy your life,party all night,bite like a dog and purr like a cat thats it
Explanation:
i dunno
what would cause the different liquids to have different density
Answer:
The same amount of two different liquids you used in the container will have different densities because they have different masses. The liquids that weigh more (a higher density) will sink below the liquids that weigh less (a lower density).
Material: Density (g/cm3)
Light Corn Syrup: 1.33
Vegetable Oil: 0.92
Explanation:
Science
explain briefly the function of friction ridges on our palm and finger.
In completing a Fischer Esterification experiment using acetic acid and unknown alcohol catalyzed by sulfuric acid a student starts with excess acetic acid with the intention of shifting the equilibrium towards formation of product. Identify the law used to predict this effect.
Answer:
The equilibrium law
Explanation:
According to the equilibrium law , when [tex]$\text{concentration}$[/tex] of any of the reactants or the products in the reaction at an equilibrium state, is changed, then it changes the composition of equilibrium mixture in order to minimize the effect of
Acetic acid (in excess) + [tex]$\text{alcohol}$[/tex] ⇄ [tex]$\text{ester}$[/tex] + water
[tex]$\text{Fischer esterification}$[/tex] is a reaction which involves the equilibrium. So to force the reaction towards the side of [tex]$\text{ester}$[/tex], one of the reactant is taken in excess. All this can be explained easily by applying the equilibrium law.
an example of binary compound is
Answer:
Explanation:
An example of binary compund is ZnI2 is zinc iodide
Answer:
https://sciencenotes.org/what-is-a-binary-compound-definition-and-examples/
Explanation:
https://sciencenotes.org/what-is-a-binary-compound-definition-and-examples/
PLEASE help, ill mark brainliest. an inflated balloon is left outside overnight. initially, it has a volume of 2.89L when the temperature 32.4 degree celsius and the pressure is 101.87 kPa.the temperature falls to 22.3 degree celsius and the pressure remains constant. what is the volume now?
a) what temperature scale must be used?
b) calculate the new volume
Answer:
B) 2.85 ∘C
Explanation:
A) Kelvin
Which binary molecular compound includes an element with five atoms of one element?
Answer:
For example, N2O4 is referred to as dinitrogen tetroxide, not dinitrogen tetraoxide, and CO is called carbon monoxide, not carbon monooxide.
...
Binary molecular (covalent) compounds.
Prefixes used in chemical nomenclature
prefix number of atoms
tetra- 4
penta- 5
hexa- 6
Explanation:
Determine the number of atoms in 285 amu of F.
it is either 10, 15, 20 or 25 please help asap
Answer:
I have no idea but I think its 15 ;-;
Explanation:
Why is helium lighter than lead? Please someone help !
Convert 360 k to Celsius
Answer:
86.85°C
Explanation:
K = °C + 273.15
360K − 273.15 = 86.85°C ≈ 87°C
How many moles of h2o2 are required to make 6 moles of oxygen gas?
Answer: 2 moles
Hydrogen has an atomic mass of 1.008 g/mol and oxygen has an atomic mass of 15.9993 g/mol. According to the formula there are 2 moles of hydrogen and 2 moles of oxygen in each hydrogen peroxide molecule.
NaOH dissociation equation
Answer:
This can be represented by the chemical equation: NaOH H2O→ OH- + Na.
why does glucose more soluble in water comparing to benzoic acid?
Answer:
Because it desolves in water very well