Answer:
B. release oxygen as a product
Explanation:
Balance the following reaction. P4 + 3 O2 → 2P2O5
Answer:
the answer to fill the blank is 5
Explanation:
i just did the lesson :)
Answer:
5
Explanation:
what is upthrust? name the factor that affect the upthrust.
The upthrust keeps a ship afloat. The upthrust keeps swimmers on top of the water. Things weigh less in water.
The upward force exerted on a body by the fluid in which the body is submerged is called the upthrust or buoyant force. The property of liquid to exert an upward force on a body immersed in it is called buoyancy. Being a force upthrust is measured in newton or kgf in the system of international units. Examples Pushing an empty can into water experiences the buoyant force. Pushing a cork into water into water experiences the buoyant force. Reason for Upthrust The thrust ating on on the sides of walls of the body get neutralised because they are equal in magnitude and opposite in the directions. There is a pressure difference between the lower and upper faces of block. Since force is the product of pressure and area, The difference in pressure due to liquid is on th two faces of causes a net upward force called upthrust on the body immersed in the fluid.
Answer: upthrust an upward force exerted by a fluid that opposes the weight of an immersed object.It is the force that pushes an object up. ... the upward force that a liquid or gas exerts on a body floating in it.
When a body is placed in water, Up thrust = V x d x g
From the above formula we can say that the following are the factors that affect up thrust:
Acceleration due to gravity - (g)
Density of the liquid - (d)
Volume of the body submerged in the liquid - (V), or volume of the liquid displaced (v)
Explanation:
Waste products in the lab can always just be poured down the sink. True or false
Answer:
false
Explanation:
no, waste products in lab can't be poured down the sink because sometime cimicals can be harmfully and can damage the sink
Answer:
False
Explanation:
Your teacher has a designated area for getting rid of chemicals especially potentially hazardous chemicals
Explain how the molecular structure of soap allows it to clean many types of stains. What is a micelle? What is emulsification? How does soap work? Your answer should include a diagram of a micelle, and a discussion of polarity and intermolecular attractions. please write everything asked to be included in the response!! i am giving many points for this so please answer everything.
Answer:
1. The soap molecule is made up of two different ends that include polar head which is hydrophilic carrying carboxylate group (-CO2) (binds with water) and the other is non-polar hydrocarbon tail that is hydrophobic carrying hydrocarbon chain (binds with stain) .
When soap water is added with stain or oil, soap molecules form micelles which are the tiny clusters of soap molecules representing hydrophilic head (water-loving) points outwards that sticks to the water and hydrophobic tail (oil-loving) points inwards that stick to the oil and trap oil in the center.
As micelle is soluble in water, the trapped oil or stain is rinsed away along with soapy water.
2. A micelle is defined as a cluster of surfactant molecules that are dispersed water and form a colloidal solution.
3. Emulsification is the process in which soap act as an emulsifier that allows dispersion of immiscible liquid. It means soap will disperse stain or dirt in such a way that it can be removed.
4. As we discussed earlier, Soap has hydrophilic (water-loving) carboxylate group (-CO2) that form hydrogen bonds and ion-dipole interactions with water and the hydrophobic (water-fearing) tail carry nonpolar hydrocarbon chain that interacts with a stain by forming micelles through dispersion force.
The negatively charged carboxylate group (hydrophilic) repels each other and hydrocarbon chain (hydrophobic) trap stain inside and remove the dirt along with water.
Ammonia reacts with sulfuric acid to produce the important fertilizer, ammonium hydrogen sulfate.
What mass of ammonium hydrogen sulfate can be produced from 75 L of ammonia at 10°C and 110
Pa?
4 NH₃ + H₂
69)
thabulan)
341 1) HSO4
(aq)
Answer:
404.8g of (NH4)HSO4 is produced.
Explanation:
Step 1:
Data obtained from the question. This include the following:
Temperature (T) = 10°C = 10°C + 273 = 283K
Pressure (P) = 110KPa = 110/101.325 = 1.09atm
Volume (V) = 75L
Step 2:
Determination of the number of mole of ammonia, NH3.
The number of mole (n) of ammonia, NH3 can be obtained by using the ideal gas equation. This is illustrated below:
Note:
Gas constant (R) = 0.0821atm.L/Kmol
Number of mole (n) =?
PV = nRT
1.09 x 75 = n x 0.0821 x 283
Divide both side by 0.0821 x 283
n = (1.09 x 75) /(0.0821 x 283)
n = 3.52 moles
Step 3:
Determination of the number of mole ammonium hydrogen sulfate produced from the reaction.
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
NH3 + H2SO4 —> (NH4)HSO4
From the balanced equation above,
1 mole of NH3 produced 1 mole of (NH4)HSO4
Therefore, 3.52 moles of NH3 will also produce 3.52 moles of (NH4)HSO4.
Therefore, 3.52 moles of ammonium hydrogen sulfate, (NH4)HSO4 is produced.
Step 4:
Conversion of 3.52 moles of ammonium hydrogen sulfate, (NH4)HSO4 to grams. This is illustrated below:
Molar Mass of (NH4)HSO4 = 14 + (4x1) + 1 + 32 + (16x4) = 115g/mol
Number of mole of (NH4)HSO4 = 3.52 moles
Mass of (NH4)HSO4 =..?
Mass = mole x molar Mass
Mass of (NH4)HSO4 = 3.52 x 115 = 404.8g
Therefore, 404.8g of (NH4)HSO4 is produced.
Cuando los volcanes entran en erupción lanzan al exterior porciones de materia muy variada ¿cuales fueron los productos de la erupción del etna y en que estados de agregación se hallaban
Answer:
The Etna volcano when it previously erupted released a lot of smoke, and then volcanic lava.
Explanation:
The eruption of this volcano was on the Italian island of Sicily.
Where there were large columns of smoke and after that the volcanic magma in a viscoelastic state was released into the external environment.
Some sources claim that the eruption of this volcano reached the areas of Zaffanera.
Determine the relative formula mass of hexasodium difluoride using the periodic table below. A. 138 g/mol B. 176 g/mol C. 20 g/mol D. 42 g/mol
Answer:
Option B. 176g/mol
Explanation:
We'll begin by writing the chemical formula for hexasodium difluoride. This is given below:
Hexasodium means 6 sodium atom
Difluoride means 2 fluorine atom.
Therefore, the formula for hexasodium difluoride is Na6F2.
The relative formula mass of a compound is obtained by simply adding the atomic masses of the elements present in the compound.
Thus, the relative formula mass of hexasodium difluoride, Na6F2 can be obtained as follow:
Molar mass of Na = 23g/mol
Molar mass of F = 19g/mol
Relative formula mass Na6F2 = (23x6) + (19x2)
= 138 + 38
= 176g/mol
Therefore, the relative formula mass of hexasodium difluoride, Na6F2 is 176g/mol
Answer:
B. 176 g/mol
Explanation:
chemistry ed tell
Which characteristic gives the most information about what kind of element
an atom is?
A. The atomic number
B. The atomic mass
C. The number of electrons
D. The number of neutrons
Answer:
A. The atomic number
the anwer is B.The atomic mass because atoms may be similar atomic mass ,number of electron,proton,and neutron by the presence of isotope but no two atoms have the same atomic number
Need help please help
Explanation:
a)phenotype= 100% big
b) genotype=1:2:1 (FF-25%, Ff-50%, ff-25%)
phenotype=3:1 (big=75%, small= 25%)
14. Compare between the plasticity of edge and screw dislocations in BCC metals 15. Why does a screw dislocation in a BCC metal needs high thermal activation to move?
Answer:
14) The edge dislocation is more plastic than the screw dislocation
15) So as to form kinks that are fast moving
Explanation:
14) Edge and screw dislocations are the two main types of mobile dislocations
The three dimensional core of the screw dislocation prevents the slipping of the layers (one over the other) in a BCC metal such that kinks are required to be formed first by thermal activation (heating) in order. The kinks are edge dislocation that move such that the screw dislocation moves forward
Hence, the edge dislocation is more plastic than the screw dislocation
15) The three dimensional structure of a screw dislocation acts like a wedge which resists the slipping of the layers in the BCC structure such that the screw dislocation needs to be highly thermally activated forming kinks before the surrounding layers can move.
When calcium is allowed to react with nitrogen, calcium nitride is formed. If 24.0 g of calcium and 12.0 g of nitrogen are available for this reaction, the limiting reagent will be?
Estimate the freezing point depression of 0.19
m C12H22O11(aq). The freezing point constant of water is 1.86 K · kg/mol.
Answer in units of ◦C.
Answer:
0.3634 °C
Explanation:
In this question, we are tasked with calculating the freezing point depression of 0.19 M C12H12O11( sucrose)
Mathematically this can be calculated using the formula;
ΔTf = i * kf * m
where ΔTf is the freezing point depression
i is Van’t Hoff factor
kf is the molal freezing point depression for the solvent
m is the molality of the solution
From the question we identify the following;
Since sucrose is a non-electrolyte, i = 1 ( i refers to the number of moles of particles obtained when 1 mol of solute dissolves)
m is 0.19
kf = 1.86
substituting these values into the equation, we have
ΔTf = 1 * 1.86 * 0.19 = 0.3534 °C
A force of 10 newtons is acting upon a box. If the box is not moving, we can assume-
Answer:
We can assume that all force acting on the box are balanced in all directions .
Can someone help me for one of these questions it would mean a lot pls
Answer:
Hope this helps you
if a car of 2 kg mass has a force of 8 Newtons exerted on it what is it’s acceleration
a) 16 m/s^2
b) 4 m/s^2
c) 0.25 m/s^2
Answer:
b) 4m/s^2
Explanation:
F=ma
F=8N
m=2kg
a=?
a=F÷m
8/2=4
acceleration=4m/s²
Give an example of a device that would contain both a diode and a transistor?
Answer:
A television.
Explanation:
Diodes and Resistors are important components of modern day appliances. They are both made up of electrical components with two-terminals. The resistors provide resistance to the appliance while the diode enables electric current to flow in one direction. This enables proper functioning and prevention of hazards associated with electric current.
What does “unsaturated” refer to when talking about solutions
Answer:
Not saturated
Explanation:
not saturated; having the power to dissolve still more of a substance. Chemistry. (of an organic compound) having a double or triple bond and capable of taking on elements or groups by direct chemical combination without the liberation of other elements or compounds, as ethylene, CH2 = CH2; undersaturated.
what is the compound name for the chemical formula FECO3
The compound name for the chemical formula FeCO₃ is iron(II) carbonate.
Fe: The symbol "Fe" represents the chemical element iron.
CO₃: The symbol "CO₃" represents the carbonate ion, which consists of one carbon atom (C) bonded to three oxygen atoms (O).
The compound's name is iron(II) carbonate, which indicates the oxidation state of iron in the compound. In this case, the Roman numeral II (2) in parentheses after "iron" denotes that the iron atom has a +2 oxidation state. The name "carbonate" indicates the presence of the carbonate ion.
Therefore, FeCO₃ is composed of one iron (Fe) atom bonded to one carbonate (CO₃) group.
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10 moles of carbon dioxide has a mass of 440 g. What is the relative formula mass of carbon dioxide?
Answer: 44g
Explanation: The formular for finding Moles is ;
Moles = Mass / Molar Mass or Formular Mass.
Base on this question; Moles = 10, Mass = 440g, and Formular Mass = ?
Making 'Formular Mass', subject of the formular; we thus have;
Formular mass = Mass / Moles = 440/ 10 = 44g
A TT genotype is said to be?
Answer:
homozygous dominant
Explanation:
AA or BB would be another example of this. Having two of either capital or lowercase letters makes it homozygous. It is dominate because their is only one type of letter; In this case it is a capital letter.
Answer:
Homozygous
According to Mendelian inheritance, every trait (characteristic) of organsim is governed by pair of genes (that exist in two different forms, recessive and dominant allele).
Dominant allele (expressed in capital letter) masks the expression of recessive allele that is expressed in small letter.
There are two possible genotypes for dominant trait, such as 'tall pea plant' can be expressed by TT (homozygous dominant, since both alleles are same) and Tt (heterozygous dominant, since both are different alleles).
Thus, TT depicts homozygous dominant genotype.
(Hope this helps) Sky
If anyone can answer all these questions you can get 35 points
Answer:
6) 225.8 g
7) 1.01 g
8) 21.624 g
Explanation:
6) Molar Mass of Lithium Bromine: 86.845
86.845 * 2.6 = 225.8 g
7) Molar Mass of Neon: 20.180
20.180 * 0.05 = 1.01 g
8) Molar Mass of Water Vapor: 18.02
18.02 * 1.2 = 21.624 g
A gas at 127०C and 10.0 L expands to 20.0 L. What is the new temperature in Celcius? (HINT: You need to convert to Kelvins solve then convert answer back to ०C)
Answer:
526.85K
Explanation:
Based on Charles's law, the volume of a gas is directly proportional to absolute temperature. The formrula is:
V₁ / T₁ = V₂ / T₂
Where 1 represents the initial state and 2 the final state of the gas
Using the values of the problem:
V₁ = 10.0L
T₁ = 127°C + 273.15K = 400.15K
V₂ = 20.0L
Thus, replacing in the formula:
10.0L / 400.15K = 20.0L / T₂
T₂ = 800K
In Celsius:
800K - 273.15 = 526.85K
Which of these does not describe the process the Wright brothers used to
create the first airplane?
A. The Wright brothers figured out how to outfit the plane with wings
that flapped, similar to birds' wings,
B. The Wright brothers used wind-tunnel tests to evaluate their
designs
C. The Wright brothers used the engineering process to come up
with its design.
D. The Wright brothers tested several model planes with similar
designs
Answer: A. The Wright brothers figured out how to outfit the plane with wings that flapped, similar to birds' wings,
Explanation: A p e x
Answer:
A
Explanation:
A p e x
10 grams of sodium hydroxide, NaOH, is dissolved in 0.25 liters of solution. Determine the molarity (M)
Answer:
1M
Explanation:
The molarity of a substance is defined as the number of moles of the substance divided by how many liters the solution is. NaOH has a molar mass of about 40 grams, meaning that 10 grams of it would be 0.25 moles. 0.25/0.25= a molarity of 1.
Hope this helps!
Explain what is wrong with the following structure.
Answer:
H = 1+
O = 2-
O Has 8 protons weight 16g/mole
H has 1 proton weight 1g/mole
H - O - H
Oxygen is in group 6 which means it holds 6 valence electrons, leaving 2 for bonds.
A valence electron is an outer shell electron that can form a chemical bond if the outer shell is not closed.
Now when an atom bonds to another in a single bond, both atoms contribute one valence electron in order to form a shared pair.
In the picture O has 7 Valence electrons, so it would have a negative charge of 1.
The middle Hydrogen has 3 valence electrons which would make hydrogen have a charge of negative 1.
Should look like this
.. ..
H . .O. .H = H-O-H
.. ..
help me with this question please
Answer:
Noble gases b/c its melts quicly that why enjoy
what element has a proton number of 79?
Homogeneous mixtures are:
a. Mixtures that have 1 phase or layers
b. Solutions that consists of only one type of atom
c. Two or more elements that have been chemically combined
d. Solutions that consists of two or more elements
What is the best description of the energy stored in a stretched or compressed object.
Answer:
Elastic Potential Energy
Round to 3 significant figures.
1.235
Answer:
1.24
Explanation:
According to the concept of significant figures, rounding off to 3 significant figures gives 1.24.
What are significant figures?Significant figures are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.
The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:
1)All non-zero digits are significant .
2)All zeroes which occur between non-zero digits are significant.
3)All zeroes to the left and right of a non-zero digit are not significant.
4) All zeroes on right of decimal are significant if a non-zero number follows them.
5)All zeroes on right side of non-zero digit are significant.
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