Answer:
Combustion reaction
General Formulas and Concepts:
Chemistry
Synthesis Reactions: A + B → ABDecomposition Reactions: AB → A + BSingle-Replacement Reactions: A + BC → AB + CDouble-Replacement Reactions: AB + CD → AD + BCExplanation:
Step 1: Define
2C₂H₂ + 5O₂ → 2H₂O + 4CO₂
Step 2: Identify
Any organic molecule reacting with oxygen to produce water and carbon dioxide is a combustion reaction.
We also see from the RxN that is is a double replacement reaction.
Answer:
Answer: 0.4 g
Explanation:
1) Balanced chemical equation:
2) 2C2H2 + 5 O2 → 4CO2 + 2 H2O
3) mole ratios:
2 mol C2h2 : 5 mol O2
4) Convert 0.13 g C2H2 into number of moles
n = mass in grams / molar mass
molar mass C2H2 = 2 *12g/mol + 2*1 g/mol = 26 g/mol
n = 0.13 g / 26 g/mol = 0.005 mol
5) Set the proportion with the unknown
5 mol O2 x
----------------- = ---------------
2 mol C2H2 0.005 mol C2H2
x = 0.005 mol C2H2 * 5 mol O2 / 2 mol C2H2 = 0.0125 mol O2
6) Convert 0.0125 mol O2 to grams
mass = number of moles * molar mass
molar mass of O2 = 32 g/mol
mass = 0.0125 mol * 32 g/mol = 0.4 g
Answer: 0.4 g
Explanation:
A 2.70g vitamin C tablet is found to contain 0.0109 mol of
ascorbic acid (C6H806}. The molar mass of C6H806 is 176.12 g/mol. What
is the mass percent of C6H806 in the tablet?
We are given:
Mass of the tablet = 2.7 grams
Number of moles of Ascorbic acid present in the tablet = 0.0109 moles
Molar mass of Ascorbic acid = 176.12 g/mol
Mass of Ascorbic Acid present in the tablet:
Mass of a given number of moles = number of moles * molar mass
replacing the variables
Mass = 0.0109 * 176.12
Mass = 1.92 grams (approx)
Mass percent of Ascorbic acid:
Mass% = ([tex]\frac{Mass of Ascorbic Acid}{Mass of the Tablet}[/tex]) * 100
replacing the variables
Mass% = (1.92 / 2.7) * 100
Mass% = 192 / 2.7
Mass% = 71.12 %
Therefore, the tablet has 71.12% Ascorbic Acid by mass
Answer:
71.1
to 3 sig figs
Explanation:
from Khan Academy
definition of instantaneous speed
Answer:
Explanation:
The instantaneous speed is the speed of an object at a particular moment in time. And if you include the direction with that speed, you get the instantaneous velocity.
9. How many protons, neutrons, and electrons does 35C1l- have?
O 17 protons, 16 electrons, 18 neutrons
O 16 protons, 17 electrons, 18 neutrons
017 protons, 18 electrons, 18 neutrons
O 17 protons, 17 electrons, 18 neutrons
How much ice could be melted at 0°C if 5200 joules of heat were added?
Answer:
0.02kg
Explanation:
Given parameters:
Amount of heat = 5200J
Unknown:
Mass of ice that would be melted at 0°C = ?
Solution:
To solve this problem, use the expression below;
H = mL
H is the heat
m is the mass
L is the latent heat of fusion of ice = 3.33 x 10⁵ J/kg.
Insert the parameters and solve for m;
5200 = m x 3.3 x 10⁵
m = [tex]\frac{5200}{3.33 x 10^{5} }[/tex] = 0.02kg
Is N2 a compound or an element
Answer:
Element.
General Formulas and Concepts:
Chemistry
Reading a Periodic TableDiatomic ElementsExplanation:
Diatomic Elements are elements that are bonded to themselves. Naturally, these elements are not found alone in nature.
Diatomic Elements:
Hydrogen
Nitrogen
Oxygen
Fluorine
Chlorine
Bromine
Iodine
Since Nitrogen is a diatomic element, we would find Nitrogen in nature as N₂.
What is the balanced chemical equation for the reaction of solid calcium metal and aqueous aluminum nitrate?
Answer:
3 Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + 2 Al(s)
Explanation:
Let's consider the single displacement reaction between solid calcium metal and aqueous aluminum nitrate. The unbalanced chemical equation is:
Ca(s) + Al(NO₃)₃(aq) ⇒ Ca(NO₃)₂(aq) + Al(s)
We have 3 nitrates on the left and 2 nitrates on the right, so we will multiply Al(NO₃)₃(aq) and Ca(NO₃)₂(aq) by 2 and 3, respectively, to balance them.
Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + Al(s)
Finally, we have to add coefficients before Ca(s) and Al(s) to balance the equation.
3 Ca(s) + 2 Al(NO₃)₃(aq) ⇒ 3 Ca(NO₃)₂(aq) + 2 Al(s)
A balloon contains 3300 mL of helium gas at 63 °C. What is the final volume, in milliliters, of the gas when the temperature changes to each of the following, if pressure and amount of gas do not change? Part A 78 C Express your answer to two significant figures and include the appropriate units. UA Vi= Value Units
The final volume : 3.4 L
Further explanationCharles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
V₁=3300 ml
T₁=63 + 273=336 K
T₂=78+273=351 K
the final volume :
[tex]\tt V_2=\dfrac{V_1.T_2}{T_1}\\\\V_2=\dfrac{3300\times 351}{336}\\\\V_2=3447.3~ml\rightarrow 2~sig.~fig.\rightarrow 3.4~L[/tex]
alison measured the temperature of benzene as 26.1K if the correct value is 24.9K what is the percent error
Answer:
Percent error = 4.8%
Explanation:
Given data:
Measured value = 26.1 K
Actual value = 24.9 K
percent error = ?
Solution:
Formula:
Percent error = [ measured value - actual value/ actual value] × 100
Percent error = [26.1 K - 24.9 K/24.9 K] × 100
Percent error = [ 1.2K /24.9K]× 100
Percent error = 0.048 × 100
Percent error = 4.8%
2. Write a statement that relates chain length and boiling point.
3. Write a statement that relates polarity and solubility in water
4. Write a statement that relates polarity and solubility in oil
Answer:
Higher chain length, higher boiling point
Polar species are soluble in similar polarity water, Non polar species are soluble in similar non polar oil.
Explanation:
Chain length refers to the number of carbons. As it increases, boiling points of alkanes increase for these compounds. Reason behind is that longer chain molecules become more entangled along with each other.
Polarity bonds atoms together, by chemical bonding - through sharing seperated electric charge ie electrons. Polar Solvents have large dipole moments, contain bonds between atoms with different electro negativities. Non Polar solvents contain bonds between atoms with similar electro negativities.
Polar species are soluble in water, as it is from same category. Non Polar species are soluble in oil, as it is from same category. Substances with same polarity are soluble in each other, substances with different polarities are different from each other.Draw the structures of cyclohexane and benzene. Show all hydrogen atoms. Cyclohexane, C6H12 (six C in a ring) Benzene, C6H6 (six C in a ring)
Answer:
See attached picture.
Explanation:
Hello!
In this case, considering that the cyclohexane has six carbon atoms and therefore twelve hydrogen atoms in its structure because it has no double bonds unlike benzene which actually has three and therefore it has six carbon atoms but six hydrogen atoms, on the attached picture, you will see the structure of both hydrocarbons as required, considering that each carbon atom must have four bonds in order to complete the corresponding octets.
Best regards!
Enter the balanced net ionic equation for the potentially unbalanced equation NH4Cl(aq)+NaOH(aq)→H2O(l)+NH3(g)+NaCl(aq).
Answer:
NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)
General Formulas and Concepts:
Chemistry - Solutions
Solubility RulesReaction PredictionCompound statesExplanation:
Step 1: RxN
NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)
Step 2: Balance RxN
NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)
1 N on each side5 H on each side1 Cl on each side1 Na on each side1 O on each sideAlready balancedStep 3: Ionic Equations
Total Ionic Equation
Break up aqueous solutions.
NH₄⁺ (aq) + Cl⁻ (aq) + Na⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g) + Na⁺ (aq) + Cl⁻ (aq)
Net Ionic Equation
Cancel out spectator ions.
NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)
If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded to the central atom in each case, is the molecule polar, nonpolar, or does it depend on the identity of the outer atom?
Answer:
It depends on the identity of the outer atom
Explanation:
We must recall that the polarity of a molecule depends on difference In electronegativity between atoms as well as the shape of the molecule.
When a central atom has no lone pairs and all the groups in the molecule are bonding, the identity and arrangement of the outer atoms will determine the polarity of the molecule.
A polar molecule is formed by certain types of outer atoms arranged in certain ways around the periodic table and vice versa.
The identification of the outer atom determines whether the molecule is polar or non-polar. The CH4 compound, for illustration, is a non-polar compound.
There really is no dipole present here because the net dipole moments cancel one another out. As a result, the dipole moment is negligible.
The molecule CH3Cl, for instance, is a polar molecule. There is indeed a dipole force here, and the net polarization isn't zero.
As a result, it exhibits a dipole moment. As a result, the identification of the exterior atom determines whether the molecule is polar or non-polar.
Learn more:
https://brainly.com/question/15988737?referrer=searchResults
How many molecules of oxygen are in 3.0 moles of oxygen?
Answer:
There are 18 moles of oxygen in 3.0 mole of glucose...
Explanation:
Does it help???
Answer:
18.066× 10²³ molecules
Explanation:
Given data:
Number of moles of oxygen = 3.0 mol
Number of molecules = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
3 mol × 6.022 × 10²³ molecules / 1 mol
18.066× 10²³ molecules
How does the reactivity down group 1 and 7 differ and how is this related to the
atomic radius of these elements?
Answer:
Explanation:
Group 1 elements have a single electron (called the valence electron) in there outermost shell. Reactivity of group 1 elements (alkali metals) increases down a group; this is because as one moves down the group, the atomic radius increases thus causing the outermost electron/valence electron to be found further away from the nucleus, which makes it (the electron) to be easily lost due to weaker force of attraction between the single valence electron and the central nucleus.
However, in the case of group 7/halogen elements, as one moves down the group, the atomic radius also increases, but the reactivity reduces. This is because as one moves down the group and the atomic radius increases, the nucleus ability to attract an electron lowers, because of the increased number of electrons that shields against the pull of the nucleus (this is referred to as nuclear shielding). This is the reason fluorine is the most reactive halogen.
The percent composition of oxygen in XeO3 is
Answer:26.771%
Percent composition by element
Element Symbol Mass Percent
Xenon Xe 73.229%
Oxygen O 26.771%
Can a bearded dragons eat a Hammerhead worm
Answer:
Definetly not they would choke on it
Answer:
no please do not do that
Explanation:
Pls answer quickkk :)))
Answer:
c turns back when iodine is added result indicated a chemical reaction
ancient hunters used obsidian rock to make spears. given this information, what can you conclude about the minerals in obsidian rock? explain your reasoning.
it must have been light, so it can be more mobile, and strong to penetrate skin and flesh, and easy to carve so they can put it on a spear.
your welcome and a brainliest would be nice if you can
Joan has four containers. The chart below shows the mass and volume of each of the containers. Two of the containers are filled with solids, one is filled with a liquid, and one is filled with a gas.
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, it should be noted that if the containers are compared with an equal average volume, the containers having solids will have larger masses than that containing liquid which will also have a larger mass than that containing gas. This is because solids have there molecules touching each other in compact manner which makes the molecule exert a certain combined force/mass. The molecules of liquid are also close to one another but are not compact like the solids and are hence exerting a lesser force/mass than solids. Gases have free molecules that are far apart and thus are usually the lightest when they occupy the same volume as liquids and solids.
Which describes an effect that ocean currents have on short term climete change
Answer:
ocean
Explanation:
Small or even large mountainous areas that have had long droughts or who have had many wildfires are prone to mudslides because many plants are destroyed during those processes. Mudslides are when large amounts of water accumulate rapidly in the soil in mountainous areas. The soil becomes over saturated with water and gravity causes the water-soaked soil to “run down” the mountain in a river like behavior. Without plants and their root systems to hold the soil in place, the soil gets washed away during rail storms. Which natural process causes these mudslides and washes away the soil?
If you have 45.0g of mercury Il perchlorate, how many moles do you have?
Answer:
Approx. 0.1126 mol
H= aC+ b what does this mean?
Answer:
I think it's Hydrogen is equal to aCalcuim plus b
QUICK I WILL CHOOSE BRAILEST
What is convection?
1. Transfer of heat through objects touching source
2. Transfer of heat through direct physical contact
3. Transfer of heat through electromagnetic waves
4. Transfer of heat through the movement of particles
Answer:
C
Explanation:
Answer:
4. Transfer of heat through the movement of particles
Explanation:
because it goes in a circular motion
A model of an atom which contains 24 electrons, 25 protons and 26 neutrons has some of its particles inside a nucleus at the centre of the model. What is the nucleon number (mass number) of the atom?
Answer:
The nucleon number of given atom = 51
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
The mass number is also called nucleon number.
The nucleon number of given atom = number of protons + number of neutrons
The nucleon number of given atom = 25 + 26
The nucleon number of given atom = 51
What is the molality of a solution prepared by dissolving 150.0 g C6H12O6 in 600.0 g of H2O?
Answer:
50/36 = 25/18
Explanation:
Solution at attachment box
Molality = mole of dissolvable (this question glucose) / kg of water
Answer:
Molality = 1.38 mol/Kg
Explanation:
Given data:
Molality of solution = ?
Mass of C₆H₁₂O₆ = 150.0 g
Mass of water = 600.0 g (600 g ×1 kg/1000 g= 0.6 Kg)
Solution:
Number of moles of C₆H₁₂O₆:
Number of moles = mass/molar mass
Number of moles = 150.0 g/180.16 g/mol
Number of moles = 0.83 mol
Molality:
Molality = moles of solute / kg of solvent
Molality = 0.83 mol /0.6 Kg
Molality = 1.38 mol/Kg
Which contribution added to rutherfords discovery of a positive nucleus atoms are invisible electrons are scattered in an atom neutrons are inside the nucleus of An atom atoms of the same element have the same properties
Answer:
neutrons are inside the nucleus
Explanation:
The most significant contribution that added to Rutherford's discovery of a positive nucleus is that neutrons are also inside the nucleus.
The discovery of neutrons as a nuclear particle was instrumental to Rutherford's discovery. Since during his experiment, the alpha particles were deflected partly, he suggested a massive nucleus made up of just protons. With the discovery of the neutron, the mass of the nucleus was enough to cause the deflection.
The survival of aquatic organisms depends on the small
amount of O2 that dissolves in H2O. The diagrams above
represent possible models to explain this phenomenon. Which
diagram provides the better particle representation for the
solubility of O2 in H20, and why?
Answer:
Explanation:
Diagram 2! Because the polar H2O molecules can induce temporary dipoles on the electron clouds of 02 molecules.
What are some properties that can be used to describe a solid, liquid and gas?
Answer:
Solids have a defined shape and volume.
Liquids have a definite volume but can take the shape of a container.
Gas has no definite volume or shape.
Answer:
See Explanation for more details...
Explanation:
Solid: defined form, minimal potential energy, it is not compressible, defined mass.
Liquid: No defined form, has more potential energy than the solids, it is not compressible, defined mass.
Gas: No defined form, high potential energy, it is compressible, defined mass.
The combustion of ethane (C2H6) produces carbon dioxide and steam.
2C,H, (g) + 702(g) — 4CO2(g) + 6H2O(g)
How many moles of Co, are produced when 5.55 mol of ethane is burned in an excess of oxygen?
moles of CO2:
Answer:
Number of moles of CO₂ produced = 11.1 mol
Explanation:
Given data:
Mass of ethane = 5.55 mol
Number of moles of CO₂ produced = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Now we will compare the moles of ethane and carbondioxide.
C₂H₆ : CO₂
2 : 4
5.55 : 4/2×5.55 = 11.1 moles
Number of moles of CO₂ produced = 11.1 mol