Answers
Related Questions
SnO2 + C → Sn + СО balance
Answers
Answer:
Tin(IV) Oxide + Carbon = Tin + Carbon Monoxide
Explanation:
Mariyam, a marine biologist, measures the length of a great white shark at 4.5 m long and its teeth at an average of 50 mm long. She wants to convert both measurements to centimeters.
Answers
Answer:
450cm
50cm
Explanation:
10mm = 1 cm = 0.1 dm = 0.01 m
You always multiply by ten from right to left and divide by ten from the left to the right.
The literature value for the Ksp of Ca(OH)2 at 25°C is 4.68 × 10-6. How does the value you determined in the lab compare with this result? Explain what may have caused your result to differ from this value. (Clearly explain what may have happened. Should you have obtained the literature value? Clearly explain how this could have happened?)
Answers
% error = (4.50 x 10^-3 - 4.68 x 10^-6) x 100/4.50 x 10^-3 = 99.90%
The error could have occured due to higher dilution of the solution which enhances the solubility of Ca(OH)2 in the solution.
The solubility equilibrium is the constant for the solid solute that gets dissolved in an aqueous solution. The experimental value is higher than the literature value.
What is solubility equilibrium?Solubility or the equilibrium constant (Ksp) is the level at which the solute gets dissolved in a solution and depicts the solubility of the solute.
The percentage error is calculated as:
[tex]\dfrac{(4.50 \times 10^{-3} - 4.68 \times 10^{-6}) \times 100}{4.50\times 10^{-3}} = 99.90\%[/tex]
The higher dilution or unsaturated calcium hydroxide may be the reason for the error and increased solubility of the solute.
Therefore, the experimental is higher than the theoretical value.
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Non-red hair is dominant. And Red hair is recessive. What are Josh's genotype and phenotype?
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Phenotype = Non-red
Genotype = depends on what genes you are using
HELP ASAP THIIS IS DUE IN 1 hour Helpp
Answers
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
Answers
Burning fuels such as hydrocarbons is useful because it releases light and what kind of energy?
Answers
Answer: Hydrocarbon fuels like methane (CH4) burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy. When energy is released during the course of a chemical reaction, it is said to be an EXOTHERMIC reaction.
Explanation:
Burning fuels such as hydrocarbons are useful because it releases light and it is said to be an exothermic reaction.
What is a hydrocarbon?A hydrocarbon is an organic compound consisting of hydrogen and carbon found in crude oil, natural gas, and coal.
Hydrocarbon fuels like methane ([tex]CH_4)[/tex] burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy.
When energy is released during the course of a chemical reaction, it is said to be an exothermic reaction.
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Maya has an attached earlobe. What is responsible for Maya’s ear shape?
Answers
Answer:
A
Explanation:
The factor responsible for Maya having an attached earlobe is ; ( A ) The genetic material inside her cells nuclei where her chromosomes are found
The physical composition and shape of certain individuals' organs like ; eye color, nose shape and size of earlobe is dependent on the composition of genetic materials present in the nucleus of the cell and not environmental factors in which the offspring was born into.
The genetic materials contained in the blood cells does not determine the physical outlook of an individual but the contents and shape of the blood cells.
Hence we can conclude that The factor responsible fo Maya having an attached earlobe is, The genetic material inside her cells nuclei where her chromosomes are found
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Mole Conversion: find the grams in 1.26 x 10^-4 moles of CH3COOH
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you have to divide 1.26x10^-4 by 6.022x10^23
The "dots" in a electron dot structure (Lewis Dot) represent the following:
Valence electrons, the electrons that are in a noble gas.
Valence electrons, all the electrons that surround the nucleus of an atom
The group numbers 1A thru 8A
Valence electrons, the outer most electrons used in bonding
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Answer:
the statement is true.....
can someone please help ?????
Answers
Answer:
hey have one valence electron
they are called alkali metals not Alkaline earth metals
they react with water
are metals
Explanation:
hope this helps
Which physical property can NOT be observed using 5 senses without changing the chemical makeup of the object that you are observing?
A. Mass
B. Color
C. Ability to conduct heat
D. Texture
Answers
WHAT WILL HAPPEN TO THE RESISTANCE OF CONDUCTOR IF :
1. the length of the wire is halved?
2. the area of cross-section of the conductor is increased?
3. the temperature of the conductor is increased?
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Answer:
1. The length of the wire is halved.
the resistance of a conductor is directly proportional to it's length (L) as R - L. Thus doubling it's length will double it's resistance, while halving it's length would halve the resistance. Also the resistance of a conductor is inversely proportional to it's cross sectional area.
2. The area of cross-section of the conductor in increased.
On increasing the area of cross-section, resistance decreases. Thus is because resistance is inversely proportional to area.
3. The temperature of the conductor is increased.
With increasing temperature, the resistance of the wire increases as collisions within the wire increases and "slow" the flow of current... Since conductors typically display an increased resistivity with temperature increase, they have a positive temperature coefficient.
How many neutrons, electrons, and protons are in carbon?
Answers
Answer:
six protons, six neutrons, and six electrons
Explanation:
Explanation:
Six protons (because its proton number, at the bottom, is 6)
Six electrons (because the number of protons and electrons in an atom is the same)
The symbol also tells us that the total number of protons and neutrons in a carbon atom is 12. Note that you can work out the number of neutrons from the mass number and atomic number. In this example, it is 12 - 6 = 6 neutrons.
Hope I was helpful!
Plz help
When the equation Al + Br2 - AlBr3 is balanced, the coefficient for Al is
a 1
b 2
c 3
d 4
Answers
Answer:
c
Explanation:
The coefficient of Al in the balanced chemical equation has been 2. Thus, option B is correct.
The balanced chemical equation has been termed as the equation where the atoms of each element have been the same on the product and the reactant side.
The given chemical equation has consisted of 2 atoms of Br on the reactant side and 3 atoms of Br on the product side.
The atoms have been balanced with the addition of coefficient 3 on the reactant side, and 2 on the product side. This will give the 6 atoms of Br on both the products and the reactant's side.
[tex]\rm Al\;+\;3\;Br_2\;\rightarrow\;2\;AlBr_3[/tex]
The atoms of Al have become imbalanced. The Al atoms can be balanced by the addition of 2 as a coefficient on the reactant side. This will provide 2 atoms of Al on both the product and the reactant side.
[tex]\rm 2\;Al\;+\;3\;Br_2\;\rightarrow\;2\;AlBr_3[/tex]
The coefficient of Al in the balanced chemical equation has been 2. Thus, option B is correct.
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plzz someone helppp!!
True or False: Write True or False in the blank next to the statement.
It is possible to have a decimal coefficient.
A Similar element replacing another in a compound is a Single Replacement
Both sides of the chemical equation must be equal after solving.
I wrote my name at the top of the page.
Synthesis Reactions involve a larger compound splitting into smaller parts. 10.
Answers
Answer:
im happy to help with any other questions!
true,true,false,true,false
Answer:
Here we goooo
Explanation:
False. Atoms cannot be divided.
It is possible to have a decimal coefficient.
True.
A Similar element replacing another in a compound is a Single Replacement
True, given the chemical reaction that took place.
Both sides of the chemical equation must be equal after solving.
I sure hope so.
I wrote my name at the top of the page.
False. That is decomposition reactions.
Synthesis Reactions involve a larger compound splitting into smaller parts. 10.
In a series of controlled experiments, a student measures the force acting on a go-cart and the go-cart's acceleration. The student's data are shown below.
Based on the recorded observations, what is the mass of the go-cart in kilograms?
Answers
The mass of the go-cart in kilograms : 20 kg
Further explanationNewton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
[tex]\large {\boxed {\bold {a = \frac {\sum F} {m}}}[/tex]
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
Maybe the student's data are shown in the attachment
So, the mass of the go-cart :
[tex]\tt m=\dfrac{10}{0.5}=\dfrac{20}{1}=\dfrac{30}{1.5}=\dfrac{40}{2}=20~kg[/tex]
what will happen if you put carbon and water together plz answer
Answers
Answer:
Carbon dioxide reacts with water and produces carbonic acid (green irregular blob) which produces hydrogen ions. These ions bond to the carbonate ions and create a substance (bicarbonate ion not shown) that the organisms can't use.
Explanation:
i looked it up
Answer:
You get carbonated or fizzy water. The process requires that the cold/cool water be saturated with CO2.
Explanation:
HELP 20 POINTS
Predict the products of each reaction
Na + HCl→
PbCl2(s) + Li2SO4(aq) →
Zn(s) + AgNO3(aq) →
Answers
Answer:
2Na + 2HCl → 2NaCl + H2
PbCl2 + Li2SO4 = LiCl + PbSO4
Zn(S) + AgNO3(Aq) = ZnNO3(Aq) + Ag(S)
The movement of an object toward earth Soley because of gravity is called
Answers
Answer:constant acceleration. A steady change in velocity.
Explanation:
Why is a map considered a model?
Answers
Answer:
Every map is a representation of reality, thus a model in the broadest sense. Sometimes mapping is distinguished from modelling by stating that mapping is a simple representation of reality, while modelling is trying to cover more complexity in reality.
Explanation:
The mass of an object on the Moon would have _______________ mass if it was moved to Earth.
would it be -
A~ less
B~more
or C~the same
Answers
Answer:
I think its A. Because space has no gravity..
Explanation:
ANSWER THIS QUESTION AND GET 10 POINTS AND BRAINLEST
Answers
Answer:
Its highly basic
select all that are true
A
The central atom of any valid Lewis electron-dot structure must have a minimum of eight valence
electrons.
B
G. N. Lewis based his electron-dot model for chemical bonding on the fact that all noble gases have
ns²npa valence configurations (except hydrogen, which is 1s2).
es?
С
For the most part, electron-dot structures show electrons in pairs, but there are exceptions.
rotons
D
One of the points in favor of acceptance of the quantum mechanical model is that it explains why
Lewis' electron dot model works so well.
E
Lewis showed valence electrons as being paired up because a maximum of two electrons can
occupy a given valence orbital.
F
Lewis used the "duet rule" and the "octet rule" in drawing his electron-dot structures. This
corresponds to the fact that in each period, the representative elements are in rows of two or eight
elements.
Answers
Consider the chemical equation.
2H2 + O2 Right arrow. 2H2O
What is the percent yield of H2O if 87.0 g of H2O is produced by combining 95.0 g of O2 and 11.0 g of H2?
Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
Answers
Answer:
the answer is C- 88.5%
Explanation:
Answer:
88.5 % or C
Explanation:
edgeeeee hope it helped
which characteristic of nuclear fusion makes it hazardous?
A. it produces new elements from existing elements
B. it only happens in the sun and other stars
C. it destroys all the atomic nuclei that go through the process
D. it releases enough energy to cause great damage to buildings
im leaning towards B but possibly C
Answers
Answer: it releases enough energy to cause great damage to buildings
The characteristic of nuclear fusion makes it hazardous is option d. it releases enough energy to cause great damage to buildings.
What is nuclear fusion?It is the process where one or more light nuclei should be fused together for producing the heavier nucleus where there is a mass deficiency that should be released like the energy.
Therefore, based on this we can say that the option d is correct.
And, the rest of the options are considered to be wrong.
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Which of these is the most helpful first step for solving Ravi's equation, 2(x + 14) = 40?
Circle the best answer.
Add 14 to both sides
Subtract 14 from both sides
Divide both sides by 2
Multiply both sides by 2which statement best explains how the cell membrane helps a cell remove waste?
Answers
Answer:
multiply both sides by 2
Explanation:
you need to distribute the 2 to both the x and the 14.
The first step to solve Ravi's equation:
Divide both sides by 2.
The correct option is C.
What is an equation?An equation is a pair of algebraic equations with the equal sign (=) in the middle and the same value.
Given:
Ravi's equation 2(x + 14) = 40.
In order to solve the equation,
we first divide both sides by 2,
we get,
x + 14 = 20
x = 6
Therefore, the value is x = 6.
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Titanium metal is used as a structural material in many high-tech applications such as jet engines. What is the specific heat of titanium in J/g°C if it takes 99.7 J to raise the temperature of a 34.7 g block by 5.20°C?
Answers
Answer:
0.553 J/g°C
Explanation:
From the question given above, the following data were obtained:
Heat (Q) required = 99.7 J
Mass (M) = 34.7 g
Temperature change (ΔT) = 5.20 °C
Specific heat capacity (C) =?
Thus, we can obtain the specific heat capacity of titanium as follow:
Q = MCΔT
99.7 = 34.7 × C × 5.20
99.7 = 180.44 × C
Divide both side by 180.44
C = 99.7 / 180.44
C = 0.553 J/g°C
Therefore, the specific heat capacity of titanium is 0.553 J/g°C.
which non metallic element is an essential constituent of nervous and muscular tissue?
Answers
Answer:
Phosphorus
Explanation:
The nonmetallic element, phosphorus, can be found in the tissues of the muscles, bones and nerves, and in the chemical adenosine triphosphate which is the major source of energy for the cells of the body.
Phosphorus is mainly concentrated in the bones, while phosphorus is also required to make the protein molecules that repair the body tissues as well as for growth
Phosphorus is also important for nerve signaling and normal heartbeat, contraction of the muscles and functioning of the kidney.
The non-metallic element should be an important constituent of nervous and muscular tissue should be Phosphorus
What is Phosphorus?It should be found in the tissues with respect to the muscles, bones, and nerves. Also, the major source of energy for the body cell should be triphosphate.
The phosphorous should be concentrated in the bones also it is needed for making out the protein molecules so the tissues of the body should be repaired for the growth purpose also.
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Which condition can cause excessive pressure on the high side of a self contained active recovery device
Answers
Answer:
What can cause excessive pressure on the high side of an active self-contained recovery device? A closed recovery tank inlet valve or excessive air or other non condensables in the recovery tank (either A or B) Portable refillable tanks or containers used to ship recovered refrigerants must meet what standard(s)?
Explanation:
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