giving brainliest
Construct a balanced symbol equation for the formation of methane from carbon and
hydrogen. (1 mark)
Answers
Answer:
reference attached
Explanation:
hope it helps you<3
C
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 atoms
This isn't right? What's wrong?
Yes, do you see it? We have more H atoms in the reactant side than the product side, and more O atoms in the product side than the reactant side. According to the Law of Conservation of Mass though, this isn't possible.
So how do you suppose we fix this?
We have to make the number of atoms on both sides equal, don't we? When we achieve this, we'll have a balanced equation.
To change the number of atoms, we can place a number in front of it, known as the coefficient. This multiplies the number of every atom by whatever number you use as the coefficient. BEWARE however, that we can never change the subscript (the little number), because doing so changes the chemical.
We have 1 C on both sides of the reaction - so this doesn't need to change.
We have 4 H on the left, and 2 H on the right. To make them equal, we place a 2 in front of the
H
2
O
like so;
2
H
2
O
. This gives us 4 H on both sides, but it also gives us another O, making the total 4 O on the right....but we still only have 2O on the left, don't we?
Place a 2 in front of the
O
2
to make 4 O on the left.
Now your reaction equation is balanced, and should look like this...
C
H
4
+
2
O
2
→
C
O
2
+
2
H
2
O
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Answers
Answer:
its 24 cuz 13 + 11 =24. you're still walking 24 km in all. your going _|
Help!! Hurry!! I will mark brainliest if you get it correct. NO SPAM!!!!!!
Write the alpha decay equation for the following isotope:
211/84 PO
Answers
Answer:
216/84 Po + 4/2 He a
Explanation:
Answer:
Problem: Polonium-210, 210Po, decays to lead-206, 206Pb, by alpha emission according to the equation 21084Po → 20682Pb + 42He
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Copper = 63.546
Iron = 55.845
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Which statement best describes the movement of energy?.
Answers
Identify the solution that is likely to have the greatest concentration of H . Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices orange juice ammonia pure water bleach blood
Answers
From what we know, we can confirm that the solution that is likely to have the greatest concentration of H+ is orange juice.
How do we know this?
This has to do with the effects of H+ in a substance. The presence of hydrogen ions causes the substance to be more acidic, and the higher the concentration the higher the acidity of the substance. Since orange juice is the only acidic solution listed, we can know it will have the highest concentration of H+ ions.
Therefore, due to its acidic nature, we can confirm that the solution that is likely to have the greatest concentration of H+ is orange juice.
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How many grams of Al2O3are present in 7.1 x 10^22 molecules of Al2O3?
Answers
Answer:
13.4g
Explanation:
we know that:
1 mole = 6.02 × 10²³ atoms
make the unknown number of moles = x
x = 7.1 × 10²² atoms
putting them both together:
1 mole = 6.02 × 10²³ atoms
x = 7.1 × 10²² atoms
Cross multiply:
6.02 × 10²³ x = 7.1 × 10²²
divide both sides by 6.02 × 10²³
[tex]x = \frac{7.1 \times 10²² }{ 6.02 × 10²³} [/tex]
[tex]x = \frac{71}{602} [/tex]
we now have the number of moles of Al₂CO₃
to calculate the grams (mass):
[tex]moles = \frac{mass}{relative \: formula \: mass} [/tex]
[tex]mass = moles \: \times \: relative \: formula \: mass[/tex]
add up all of the atomic masses of Al₂CO₃ to calculate relative formula mass:
(27 × 2) + 12 + (16 × 3) = 114
the grams (mass) of Al₂CO₃:
[tex] \frac{71}{602} \times 114 = 13.4g[/tex]
A green powder was placed into a beaker of water. After it was stirred the water looked cloudy and lumps of powder could still be seen. Has a solution been formed? Explain your answer?
Answers
Answer:
it make poisionus police come and took away
Which of the following equations represents a nuclear charge?
Select one:
a. A
b. B
c. C
d. D
Answers
Answer:
C
Explanation:
The reaction represents transmutation, which is a nuclear reaction where electrons are transferred.
An event happens that decreases the number of earthworms, spiders, and insects in an area. How would you expect the event to affect to the number of long-billed curlews in the same area? (1 point) O It would not be affected. O It would stay the same. 0 It would increase. It would decrease.
Answers
Long-billed curlews feed on insects and worms mainly. Thus, their population will drastically reduce if there is a decrease in their food availability.
Factors affecting the population of organismsOne of the factors that affect the population size of a species is food availability.
Inadequate food increases intraspecies competition and results in more deaths. This leads to a reduction in the population size.
Long-billed curlews are a species of bird that feeds on insects and worms when inland. If an event leads to a decrease in the number of earthworms, spiders, and insects in an area, this will greatly reduce the population of long-billed curlews.
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What happens to the carbon dioxide that the alveoli receive from the blood?
Answers
Answer:
it is then exhaled
Explanation:
Carbon dioxide passes from the blood into the alveoli and is then exhaled.
Organisms that live in the water (ocean, rivers, intertidal zones) must be adapted for changing conditions. Describe at least one (1) adaptation that organisms living in an aquatic ecosystem might have and how it helps the organism to survive.
Answers
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
What are organism?Organisms are living species that live on the planet earth.
There are types of organisms categorized by the environment they live.
Organism that can survive only in water is called an aquatic organism.
We have,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
Aquatic environments can have varying levels of salinity, and some organisms need to maintain a specific salt concentration in their bodies to survive.
For example, marine fish have kidneys that can produce very concentrated urine to prevent them from losing too much salt in their surroundings, while freshwater fish have specialized cells in their gills that actively pump salt out of their bodies to maintain the appropriate balance.
Similarly,
Some marine invertebrates, such as crabs and mussels, can regulate the amount of salt they take in by actively transporting ions across their gills or other specialized structures.
This adaptation helps the organism to maintain the proper fluid balance and avoid dehydration or over-hydration, which can be lethal.
Thus,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
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what is marble formed from A. obsidian B. granite C. limestone
Answers
Answer:
I'm pretty sure its C. limestone.
What mass of silver can be produced from 3.00 g of copper and 3.85 g of silver nitrate?
Answers
Answer:
Explanation:
Balanced Chemical Equation:
Cu + 2 AgNO₃ → Cu(NO₃)₂ + 2 Ag
Step 1: Find Limiting Reagent
Moles of Cu:
Mole = 3 g / 63.55 g/mol = 0.04721 mol
Moles of AgNO₃:
Moles = 3.85 g / 169.87 g/mol = 0.022664 mol
Also, Mole ratio of Cu : AgNO₃ is 1 : 2. Hence, 0.04721 mol of Cu will require 0.09442 mol of AgNO₃. This means, AgNO₃ is the limiting reagent.
Step 2: Calculate moles of Ag:
0.022664 mol of AgNO₃ will produce 0.022664 mol of Ag because both have same ratio in balanced chemical equation.
Step 3: Calculate mass of Ag:
Mass = 0.022664 mol × 107.87 g/mol = 2.4447 g
Another question. What is an example of a chemical change?
Answers
Answer:
Yellowing of leaves
Explanation:
Involves the colour change in leaves whereby less amount of chlorophyll is produced
Answer:
burning, cooking, milk becoming curd, rusting of iron
What adaptation’s do swallowtail possess?
Plz it’s urgent
Answers
4 items being divided equally among 3 people
I need help please !!!
(01.05 MC)
Two changes are described below.
A. Ice melts to form water.
B. Sugar cubes dissolve in hot coffee.
Which statement is true about the two changes?
Answers
Answer:
A is it
Explanation:
Determine the number of moles of air present in 1. 35 L at 750 torr and 17. 0°C. Ideal Gas Law formula: PV = nRT(R = 62. 396 L•torr/mol•K) Which equation should you use? P equals StartFraction n R T over V EndFraction. N equals StartFraction R T over P V EndFraction. N equals StartFraction P V over R T EndFraction.
Answers
2. Dive both sides by RT to isolate the n (moles).
3. Answer: PV/RT = n = N equals startfraction P V over R T endfraction
Answer:
Answer: PV/RT = n = N equals startfraction P V over R T endfraction Explanation:
What is the role of flagella?
Answers
Answer:
a motility organelle that enables movement and chemotaxis
Explanation:
pls mark brainlist
Hope This Helps You
How does mixing hydrogen peroxide and water test the reactivity of catalase?.
Answers
Hydrogen peroxide is not the chemical causing the reaction.
Chemical ReactionGenerally,Catalyses is an enzyme which breaks H2O2 into H2O and O2. there will be no reaction if we combine H2O with H2O2,
H2O2 receives dissolved in water except displaying any reaction. So they are used as bad manipulate in the test.
Therefore, it shows that hydrogen peroxide is not the chemical causing the reaction
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A compound has a percent composition of 15.24% sodium (molar mass
= 22.99 g/mol), 52.95% bromine (molar mass = 79.90 g/mol), and 31.81%
oxygen (molar mass = 16.00 g/mol). Assuming that the mass of the com-
pound is 100 g, what is the compound's empirical formula?
Show all your work. Please use correct formatting for subscripts and exponents.
The math formula editor makes it easier to show work.
Answers
This problem is providing us with the percent composition of a compound containing sodium, bromine and oxygen. Thus, the empirical formula is required and found to be NaBrO₃.
Empirical formulasIn chemistry, empirical formulas are used in order to figure out the minimum whole-number representation of a molecular formula, which contains the actual number of atoms.
Thus, we start determining it by assuming the given percentages as masses and calculating the moles with the atomic mass of the involved elements:
[tex]n_{Na}=\frac{15.24}{22.99}=0.700 \\\\n_{Br}=\frac{52.95}{79.90} =0.663\\\\n_O=\frac{31.81}{16.00}=1.99[/tex]
Next, we divide by the 0.633 as the smallest number of moles in order to determine their subscripts in the chemical formula:
[tex]Na:\frac{0.700}{0.663}=1\\ \\Br:\frac{0.663}{0.663}=1\\ \\O=\frac{1.99}{0.663} =3[/tex]
Hence, the empirical formula turns out to be NaBrO₃.
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Answer:
I believe this is a measuring cylinder? and i think the volume is 35cm^3
Explanation:
hope this helps!
explain why a mixture is used as the electrolyte??
Answers
Answer:
You need a mixture of positive and negative ions
Explanation:
A mixture is used as the electrolyte because a mixture of positive and negative ions are needed.
What is a Mixture?This consists of two or more chemical substances which aren't chemically bonded together.
Electrolyte on the other hand conducts electricity when dissolved with the help of the mixture of positive and negative ions.
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solve this questions please
Answers
Answer:
C. through concentrated sulphuric acid and then over heated copper
how fast is a motor cycle going that travels 6 miles in 4 minutes
Answers
Answer: 60 minutes per hour, sixty miles per hour, therefore, one mile per minute.
Explanation:
The decomposition of A to B is a first-order reaction with a half-life of 32.8 min:
A → 2B
If the initial concentration of A is 0.595 M, how long will it take for the concentration of A to decrease by 10.4 %?
Answers
A pure substance __________ . must be an element. can be separated into simpler substances by physical means. has different chemical and physical properties depending on its source. can be separated into simpler substances by chemical means.
Answers
Answer:
a pure substance has different chemical and physical properties depending on its source
How many molecules of sodium nitrate are produced when 40 g of sodium azide, NaN3, react with oxygen?
a
3.7x10^23
b
9.2x10^22
c
1.85x10^23
d
6.02x10^23
Answers
Will a piece of fruit left in the open air rot sooner in summer or in winter?
Answers
A clasping handshake may be used as an analogy for an enzyme-catalyzed reaction because it represents the specific manner in which an enzyme ________.
Answers
Answer:
binds to substrate
Explanation:
Dominique goes to the doctor for bone aches. The doctor tells him
that Vitamin D helps his body take in the Calcium for his bones.
Explain why the doctor tells Dominique to do more outdoor activities.
Answers
Answer:
sun gives you vitamin D
Explanation:
Our body creates vitamin D from direct sunlight on our skin when we're outdoors.