Answer:
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
Explanation:
Let's consider the unbalanced equation for the combustion reaction of octane.
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
We can begin balancing H atoms by multiplying H₂O by 9, and C atoms by multiplying CO₂ by 8.
C₈H₁₈(l) + O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Finally, we get the balanced equation by multiplying O₂ by 12.5.
C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Answer:
The coefficents will be 2, 25 --> 16, 18
Explanation:
Select the correct answer
Which hand is negatively charged?
Option B is the correct answer .
What is Charge ?
Charge is a basic property of matter that is associated with the presence or absence of electrons. Objects can have positive or negative charge, or they can be neutral, which means they have an equal number of positive and negative charges. In physics, charge is one of the fundamental concepts used to explain the behavior of matter and energy in the universe. The interaction between charges is described by Coulomb's law, which states that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
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Using the equation below, how many liters of water can be made from 7.6 L of oxygen gas at STP?
Answer:
V = 15.2 L
Explanation:
STP means that T = 273 K and P = 1 atm.
We use the PV=nRT equation to convert the given liters of oxygen to moles:
1 atm * 7.6 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 Kn = 0.340 molNow we convert O₂ moles to H₂O moles, using the stoichiometric coefficients of the equation:
0.340 mol O₂ * [tex]\frac{2molH_2O}{1molO_2}[/tex] = 0.68 mol H₂OFinally we use the PV=nRT equation once again to convert 0.68 moles of H₂O to liters:
1 atm * V = 0.68 * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 KV = 15.2 L(Al = 27.0 g, O = 16.0 g, H = 1.0 g)
2 Al(OH)3 Al2O3 + 3 H2O
how many grams are produced from .85 moles of AI(OH)3
Answer:
Explanation:
21
Perform each conversion
5.88 dL to liters
Answer:
5.88 dL = 0.588 litre
Explanation:
We need to find a conversion from 5.88 dL to liters.
We know that the conversion is as follows :
1 deciliter = 0.1 litre
To find 5.88 dL to liters, we use the unitary method. So,
5.88 dL= (0.1×5.88) litre
5.88 dL = 0.588 litre
So, there are 0.588 liters in 5.88 dL.
Students investigate forces and how they affect objects. They use a small car and wooden blocks to carry out their investigation
They pushed the cart and blocks 10 times, using the same amount of force. Each time, they added 5 more blocks to the wagon
They measured how far the cart moves each time. They made a line graph to show their results. What will their graph show?
The distance the cart moves decreases as the number of blocks in it increases
As the number of blocks in the cart increases, the distance it moves stays the same.
The distance the cart moves is not related to the number of blocks in it
The distance the cart moves increases as the number of blocks in the cart increases
Answer:
increase the number of blocks
increase the number of students pulling the cart
increase the number of blocks and increase the number of students pulling the cart
decrease the number of blocks
decrease the number of students pulling the cart
decrease the number of blocks and decrease the number of students pulling the cart
(ANSWER CHOICES)
Explanation:
Balancing Equations Practice
Al(NO3)3 +
3 NH4NO3
(NH4)3PO4 → | AIPO4 +
1)
2)
AgF +
CaCl2 →
AgCl +
CaF2
3)
ZnBr2 +
Pb(NO2)2 →
Zn(NO2)2 +
PbBr2
1. A globe is what kind of model?
interactive
mathematical
conceptual
visualization
Answer:
It's visualization.
Explanation:
Hope this helps :)
Which part of the landscape shown in this image is the steepest?
Answer: A I believe
Explanation:
HELP!!!!!....... Iron oxide reacts with carbon monoxide to produce iron and carbon dioxide, with the balanced chemical equation Fe2O3 + 3CO —> 2Fe + 3CO2. What does this tell you about the relative amounts of iron oxide and iron consumed and produced in this equation?
A. For every two moles of iron oxide consumed, one mole of iron is produced,
B. For every two grams of iron oxide consumed, one gram of iron is produced.
C. For every gram of iron oxide consumed, two grams of iron are produced
D. For every mole of iron oxide consumed, two moles of iron are produced.
Answer:D
Explanation: There is one mole of Iron Oxide on the reactants side(left) and two moles of iron on the products side (right).
9. How does WNS negatively affect bats?
Answer:
Scientists hypothesized that WNS, caused by the fungus Pseudogymnoascus destructans, makes bats die by increasing the amount of energy they use during winter hibernation. Bats must carefully ration their energy supply during this time to survive without eating until spring
Explanation:
11. Calculate the number of atoms in 2.00g of platinum.
Answer:
Explanation:
All you need to know is the atomic mass of platinum, and Avogadro's number.
2.00g Pt divided by atomic mass gives you the moles of platinum, and multiplying by avogadro's number (6.022 x 10^23) gives you the number of atoms.
Atomic mass of platinum can be found on any periodic table.
Hope this helped.
12.04 × 10²³ number of platinum atoms are present in 2 grams of platinum.
How we calculate no. of atoms?To calculate the no. of atoms in any substance, we have to multiply the no. of moles of that substance by the Avogadro's no.
Value of Avogadro's no. = 6.022 × 10²³
We can calculate the mole by using the below formula:
n = W / M, where,
n = no. of moles
W = given mass = 2.00g
M = molar mass or atomic mass = 195.09 g/mol
n = 2 / 195.08 = 0.0102 mol
Number of atoms in 2.00g of platinum = 2 × 6.022 × 10²³ = 12.04 × 10²³.
Hence, number of atoms that are present in 2.00g of platinum is 12.04 × 10²³.
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Radioactivity is a random Process, Why?
Explanation:
Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). Decay is said to occur in the parent nucleus and produces a daughter nucleus. This is a random process, i.e. it is impossible to predict the decay of individual atoms.
HOPE THSI HELPS HAVE A NICE DAY!
three molecules of oxygen react with four molecules of hydrogen to produce water molecules write a balanced chemical equation
Answer:
ExpC
H
4
+
2
O
2
→
C
O
2
+
2
H
2
O
This is the balanced reaction equation for the combustion of methane.
Explanation:
The Law of Conservation of Mass basically states that matter can neither be created nor destroyed. As such, we must be able to show this in our chemical reaction equations.
If you look at the equation above, you'll see an arrow that separates the reaction equation into two parts. This represents the direction of the reaction.
To the left of the arrow, we have our reactants.
To the right of the arrow, we have our products.
The quantity of each individual element in the left must equal the quantity of each individual element in the right.
So if you look below, you'll see the unbalanced equation, and I'll try to explain how to balance the reaction.
C
H
4
+
O
2
→
C
O
2
+
H
2
O
Our reactants in this equation are
C
H
4
and
O
2
.
Our next step is to break these down into individual atoms.
We have:
1 C atom, 4 H atoms & 2 O atoms.
If you're confused by this, look to see the little number to the bottom right of each element, the subscript, and it tells you how many of each atom are in the molecule. Make sense?
Now we look to the other side of the equation.
Here we see our products are
C
O
2
+
H
2
O
Again, we break these down into individual atoms again.
We have:
1 C atom, 2 H atom, 3 O atom
what is the answer?!!?
Plzzzz help
Answer:
The planet would stop
Good luck!
Solve the equation by first using the Quadratic Formula and then by factoring.
x2 – 14x + 48 = 0
Why is the combined gas law the most practiced gas law
what is the major use of carbon monoxide
Answer:
Carbon monoxide is a very important industrial compound. In the form of producer gas or water gas.
hope ths help and if you want more information go to this website: science.jrank.org
it about chemical change
Answer:
Steps 3 and 4 :)
. If Kc is the equilibrium constant for a forward reaction, 2 A⇌ B, what is Kc' for the reaction 4 A⇌ 2B?
Answer:
(Kc)^2
Explanation:
For this reaction 4 A⇌ 2B Kc is (Kc)∧².
What is equilibrium constant?The equilibrium constant is the value of the reaction quotient that is calculated from the expression for chemical equilibrium. A thermodynamic equilibrium constant, denoted by , is defined to be the value of the reaction quotient Qt when forward and reverse reactions occur at the same rate. At chemical equilibrium, the chemical composition of the mixture does not change with time and the Gibbs free energy change. Stability constants, formation constants, binding constants, association constants and dissociation constants are all types of equilibrium constants.
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wright it in 500 words Submit your persuasive essay about nuclear power. Remember to proofread your work before submitting.
Answer:
Explanation:
Introduction Paragraph. Hook. Background Points. Thesis Statement.( done)
Body Paragraph. Topic Sentence. Supporting fact 1. Supporting fact 2. Transition Sentence.(done)
Conclusion Paragraph. Re-statement of Thesis. Summary of Main Point. Challenge to the Reader.( done)
What is Molecule made off?
a) Electrons
b) Protons
c) Atoms
d) Nuclei
Answer:
C) Atoms
Explanation:
Hope that helped :)
6. The human arm, a bat's wing, a whale's flipper, and a horse's
foreleg are examples of
A. Analogous Structures
B. Homologous Structures
C. Vestigial Structures
D. Fossils
I
help! help! plz Why do two H atams combine to Form the molecule H2 while He remains monotonic?
How atoms interact with other atoms is largely dependant on the number of electrons on its outermost layer. The electrons on this layer are called valence electrons.
As you might know, atoms have their electrons arranged in layers/shells, starting at k, l m, n etc. Each layer has a maximum number of electrons it can accommodate, with the outermost one being the valence shell. The first layer (k) can accomodate 2 electrons, the second one (l) can accomodate 8, as can the third one (m) etc.
As a rule of thumb, most atoms don't like being alone. These atoms have a valence shell that isn't saturated. This is the case for hydrogen(1), with one free slot in its outter shell.
However, atoms like helium are a bit different. They are inert, and don't need to bond with other atoms. This is because their valence shell is saturated. In this case, helium saturated the k shell with 2 electrons. Helium in this form will not form bonds.
However, hydrogen is still out there looking for buddies. Hydrogen will bind with any other atom with a free electron. Being extremely common, it's likely that said atom will be another hydrogen.
However, another common example would be for 2 hydrogens to bond with one oxygen, forming h2O (oxygen can form 2 bonds)
Conclusion : helium is inert and will not interact with other atoms. Hydrogen is not, and thus needs to bond with other atoms.
If AB = 5 inches and AD = 8, find BD. Round to the nearest tenth if necessary.
WILL GIVE BRAINLIEST
Answer:
6.5
Explanation:
half of 5 is 2.5, half of 8 is 4. 2.5+4=6.5
:)
2. How might this population suddenly increase? How might this affect the ecosystem? (for tropical savannah.)
Explanation:
it can suddenly increase when more and more people have babies and the infant rate goes up. and how it might affect the ecosystem is the pollution that people give off.
Answer:
Explanation:
Due to less predators in the Savannah/habitat, the population could unexpectedly grow. This will have an impact on the environment because it will give rise to more prey as there will be fewer predators. If too many herbivores are present on one feeding site, competition for food will occur. If there are more plants in an area than normal, it can increase the population of animals that consume the plant. If the population of one animal rises, the population of animals that consume that animal could also rise.
Population growth isn't always good. A population may often grow too big to sustain the climate. Other modifications in limiting variables can cause a population to decline. The population will decrease if a population becomes diseased, and the population of animals that consume the diseased animals will decrease as well. Populations in nature typically balance themselves. Sometimes, they can't always restore a natural balance as man affects populations.
Why is nitro group called an ambident group?
Answer:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Explanation:
Explanation:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Hope this is fine for you☺️☺️☺️Soda pop is carbonated with CO2. Mark puts one bottle of soda pop in the refrigerator and leaves the other out in the hot sunlight. After one hour, he opens both bottles. Which bottle will likely have more fizzing and bubbles? Why?
Answer:
The one left in the hot sunlight.
Explanation:
The solubility of gases decreases when temperature increases. The gas in the soda pop (CO2) left in the sun will not stay dissolved as much as the on left in the refrigerator.
Soda is a carbonated drink with soda or water and a sweetener. Soda pop in the fridge will have more fizzing and bubbles.
What is carbonated?Carbonated drinks are drinks or beverages that contain dissolved carbon dioxide. They have small bubbles and fizz of the carbon dioxide present in them.
Carbonation of the drinks is linked to the temperature as at high temperature, liquid tends to lose the carbon dioxide fizz. The carbon dioxide bubbles are retained at low temperatures as the solubility of the carbon dioxide is increased.
Therefore, the bottle kept in the refrigerator will have more bubbles and fizz.
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Hotter things have more energy than colder things. this is science middle school
Answer:
true
Explanation:
Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.
Answer: Depends on the situation.
Explanation: Hotter things do have more energy than colder things. But, if the mass of the colder thing is bigger, it really depends. If the colder thing have way more particles than the hotter thing, the colder thing may have more energy.
Please help
Write a balanced equation for each chemical reactions. Include appropriate symbols. First reactant formula is given.
Hydrochloric acid (HCl) reacts with Zinc to form hydrogen gas and zinc chloride.
2 HCl +
Acetylene gas (C2H2) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor. 2 C2H2 (g) +
c. Silver nitrate plus calcium chloride (CaCll2) yields silver chloride and calcium nitrate. 2 AgNO3 +
d. Oxygen gas combines with hydrogen gas to produce liquid water. O2 +
e. Hydrogen peroxide decomposes into oxygen gas and water when it contacts blood. 2 H2O2
a. [tex]\mathrm{2HCl_{(aq)} + Zn_{(s)}} \rightarrow \mathrm{H_{2(g)} + ZnCl_{2(aq)}}[/tex]
b. [tex]\mathrm{2C_2H_{2(g)} + 5O_{2(g)}} \rightarrow \mathrm{4CO_{2(g)} + 2H_2O_{(g)}}[/tex]
c. [tex]\mathrm{2AgNO3_{(aq)} + CaCl_{2(aq)}} \rightarrow \mathrm{2AgCl_{(s)} + Ca(NO_3)_{2(aq)}}[/tex]
d. [tex]\mathrm{O_{2(g)}+2H_{2(g)}} \rightarrow \mathrm{2H_2O_{(\ell)}}[/tex]
e. [tex]\mathrm{2H_2O_{2(aq)}} \rightarrow \mathrm{O_{2(g)} + 2H_2O_{(\ell)}}[/tex]
Can someone answer this question please. Is this a physical change or chemical change?
Answer:
Chemical
Explanation:
the acid is a chemical and the molecules are getting torn apart by the acid