Answer:
temperature and solubility
Explanation:
In the experiment where we are testing the solubility of sugar at different temperatures and pressure, the dependant variable is the solubility and the independent variables are the temperature, pressure and sugar concentration.
What is independent variables ?Independent variables in an experiment is the variables which does not depends on any other variables and on which we can have access or control.
Dependant variables are dependant on the independent variables and they change with respect to the change in independent variables. On dependant variables are those which we are studying and can have no direct control over it,
In the solubility measurement, solubility is the dependant variable and the we are measuring it under different conditions that are the independent variables such as temperature, pressure, sugar concentration etc.
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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 yieldFind the number of grams of calcium chloride needed to prepare 500.0ml of a 4.0m solution
Answer:
222 g
Explanation:
First we convert 500.0 mL to L:
500.0 mL / 1000 = 0.500 LThen we use the definition of molarity to calculate how many calcium chloride moles are required:
Molarity = moles / litersMolarity * liters = moles4.0 M * 0.500 L = 2.00 molNow we convert 2.00 moles of calcium chloride into grams, using its molar mass:
2.00 mol * 111 g/mol = 222 gWhat is indicated by the prop- prefix?
Answer:
The molecule has 3 carbon atoms.
Explanation:
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
Substances that are physical combinations of two or more different types of matter are known as
Answer:
A mixture!
Explanation:
Mixtures are a substance made of combining two or more different kinds of matter :)
Hope this helped!
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
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:
1:Which example is not a physical change?
2: Which of the following is not a clue that a chemical reaction is taking place?
draw the structure of ethoxyethane
Answer:
i couldnt draw it but here is a picture
Explanation:
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 could renewable energy sources be used to heat and cool a house?
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
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
NaOH dissociation equation
Answer:
This can be represented by the chemical equation: NaOH H2O→ OH- + Na.
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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Which of the following are elements in this equation: 2H2O2 (aq) → 2H2O (l) + O2 (g)?
Check all that apply:
A. O
B. g
C. Aq
D. H
Place these elements in order of increasing ionization energy and JUSTIFY A REASON FOR THIS TREND. C Ge Pb Si Sn
Answer: The given elements are arranged in order of increasing ionization energy as Pb < Sn < Ge < Si < C.
Explanation:
The amount of energy required to remove a loosely bound electron from an isolated neutral gaseous atom is called ionization energy.
Larger is the size of an atom more easily it will lose its valence electrons. Hence, less will its ionization energy.
Whereas smaller is the size of an atom more energy will be required to pull out the electron. Hence, more will be its ionization energy.
This means that on moving down a group ionization energy decreases and on moving along a period from left to right the ionization energy decreases.
The given elements are C, Ge, Pb, Si, and Sn. All these elements belong to group 14 of the periodic table.
Therefore, these elements are arranged in order of increasing ionization energy as follows.
Pb < Sn < Ge < Si < C
Thus, we can conclude that given elements are arranged in order of increasing ionization energy as Pb < Sn < Ge < Si < C.
What is the name of the process scientists use to give different names to different organisms?
astronomy
economy
identification
taxonom
Answer:
D). Taxonomy.
Explanation:
'Taxonomy' is described as the process or the science of finding, describing, classifying, and naming different organisms. It is characterized as the technique of classification of animals, micro-organisms, plants, etc. into different categories or hierarchies. It has primarily been divided into eight distinct types like kingdom, species, order, family, etc.
Astronomy is associated with the study of the physical universe while the economy is defined as the study of efficient utilization of resources and identification is the process of recognizing an object. Thus, option D is the correct answer.
1. Molecules are held together by:
a, ionic bonds
b. covalent bonds
c. both a and b
A: ionic bond, you know why becasue it is
What is one element that is not found in the human body, air, or the universe ?
Explanation:
For the moment we have analyzed the physical point of view. For many, the most common way to analyze your body is through the chemical elements.
This increases the number of building blocks to more than four particles, but considering that the number of atoms in a 70 kilogram body is 7,000 quadrillion (you write a 7 followed by 27 zeros), it is still quite simple that we can count the 99.95% of your body weight with only seven elements.
The provocative alternative theories to the Big Bang that state that the universe has no limits
You may have heard that most of our body is water. It may seem unlikely given how solid our bodies feel, but most of you are made of cells filled with water.
There is enough structure that you are unlikely to slide down the drain, but you do have a lot of water. About 60 percent of your body is water, even your bones are roughly 30% water.
Two skeletons sitting on the beach.
IMAGE SOURCE, GETTY IMAGES
Caption,
The bones have 30% water in their composition.
Knowing that water is made up of hydrogen and oxygen (H2O), it seems clear to point out that the elements most present in the body are hydrogen and oxygen.
But there is also much of the most versatile of atoms, carbon. All life we know incorporates water and is based on carbon structures.
Since carbon atoms weigh 12 times more than hydrogen atoms, carbon ranks second by weight behind oxygen.
The thing would be like this: we have 65% oxygen, 18% carbon and 10.2% hydrogen.
If we add a small amount of nitrogen (3.1%), a pinch of calcium for those bones (1.6%), 1.2% of phosphorus, 0.25% of potassium and sulfur and smaller percentages of sodium, magnesium and chlorine, we already reached 99.95
why does glucose more soluble in water comparing to benzoic acid?
Answer:
Because it desolves in water very well
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.
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
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 is the pH of a .00034 M of HCl solution?
3.5
5.3
3.0
5.0
Answer:
pH = 3.5
Explanation:
HCl is a strong acid, so we can use this little formula to find the pH of the solution:
pH = -log[H3O+]
(where H3O+ is the strong acid, HCl)
So we just plug in the molarity for the concentration of the acid...
pH = -log(0.00034)
Solve.
pH = 3.468521083
And apply sig. figs....
pH = 3.5
Plz answer fast Name the four parts of a circuit.
Answer:
A switch
Battery or cell
Resistor
Rheostat
Appliance or load such as bulb
connecting wires.
Jockey
Inductor
Capacitor
Meter bridge
Potentiometer
Voltimeter
Ammeter
Galvanometer
How many structural isomers does C5H12 have?
a. two
b. three
c. one
d. five
Answer:
three structural isomers
Pentane (C5H12) is an organic compound with five carbon atoms. Pentane has three structural isomers that are n-pentane, Iso-pentane (methyl butane) and neopentane (dimethylpropane).
Help please!!!!!!!!!!!!
Answering so you can give the other person brainliest!
Please help me. Question is post on photo.
Answer:
London Dispersion Only
Explanation:
BF3 is non polar and nonpolar molecules only have london disperion forces