True or False: The reactants and the products of a chemical equation always have the same number of atoms.
Answer: True
Explanation: It always has the same number because the both have or are using the same product.
2. Hydrocarbons consist of carbon and hydrogen. 5.7 g of a hydrocarbon contains 4.8 g of carbon.
If the relative molecular mass of the hydrocarbon is 114, determine its molecular formula.
Answer:
The molecular formula of the hydrocarbon compound is C₈H₁₈
Explanation:
The type of chemical substance in the question = Hydrocarbon
The mass of the hydrocarbon = 5.7 g
The mass of carbon in the given hydrocarbon (sample) = 4.8 g
The relative molecular mas of the hydrocarbon = 114 g
Therefore, the mass of hydrogen in the sample, H = 5.7 g - 4.8 g = 0.9 g
The ratio of the mass of carbon in the sample = 4.8/5.7
The ratio of the mass of hydrogen in the sample = 0.9/5.7
By the law of constant composition, we have;
The mass of carbon in a mole of the hydrocarbon = (4.8/5.7) × 114 g = 96 g
The molar mass of carbon, C = 12 g/mol
The number of moles of carbon in a mole of the hydrocarbon, 'n₁', is given as follows;
n₁ = 96 g/12 g = 8 moles
The mass of hydrogen in a mole of the hydrocarbon = (0.9/5.7) × 114 g = 18 g
The molar mass of hydrogen, H ≈ 1 g/mol
The number of moles of hydrogen in a mole of the hydrocarbon, 'n₂', is given as follows;
n₂ = 48 g/1 g = 18 moles
Therefore, in each each molecule of the compound, we have have 8 atoms of carbon, 'C', and 18 atoms of hydrogen, 'H'
Therefore, we get;
The molecular formula of the hydrocarbon compound is C₈H₁₈ which is the chemical formula for the hydrocarbon also known as octane
the following punnett square shows a cross between two hybrid flowers. if the flowers show incomplete dominance, what fraction are pure red? I NEED HELP PLZ!
Answer:
1/4
Explanation:
Incomplete dominance is when the dominant ("R") gene is not completely dominant and cannot fully mask or cover the recessive ("r") gene. This means that it will result in both genes expressing and a mix of traits appearing. In the case of a flower with "R" genes for red and "r" genes for white, the following possibly combinations exist:
RR = all red, no white "r" gene
Rr = pink, as both the "R" and "r" genes are expressed
rr = white, no red "R" gene
The Punnett Square shows that only one of the four phenotypes is RR and red.
100 point and brainlist answer the question below
Answer:
a
Explanation:
because am pro
I feel sad when all the flowers
Answer:
find happy things to think about, stay strong xx
Answer: sorry u feel sad. y u feel sad?
Explanation:
We can talk if u want..
How many total atoms in 5 mg(NO3)2
Answer:
5 Mg (magnesium), 2 N (nitrogen), and 6 O (oxygen) -- total of 13 atoms
There are 45 as 1 mg(NO3)2 = 9 atoms.
How many grams of Sulfur are there in 2.05 x 10^25 molecules of Calcium Sulfate?
Answer:
1090 grams Sulfur (3 sig-figs)
Explanation:
Given 2.05 x 10²⁵ molecules CaSO₄ => 2.05 x 10²⁵ Sulfur atoms (subscript = 1 mole).
Converting 2.05 x 10²⁵ sulfur atoms to moles, divide by Avogadro's Number
(= 6.023 x 10²³ sulfur atoms / mole sulfur) => 2.05 x 10²⁵ sulfur atoms/6.023 x 10²³ sulfur atoms/mole sulfur atoms = 34.036 moles sulfur atoms.
Converting 34.036 moles sulfur to grams sulfur multiply by formula wt. of sulfur (=32g/mole S)
=> 34.036moles S x 32g/mole S = 1089.158 grams S ≅ 1090 g S (3 sig-figs)
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1 Unit 3 Lab Part 1
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Answer:
hhhhdhabbjdksdalitkslhbdlqhbdndnvlirladiksha pokgjwnfkfdiksha pokhrel shhddhhgkd
Please help! Is hot tea with lemon juice a heterogeneous, homogeneous, or pure substance? Will award brainliest!
Answer:
Homogeneous
Explanation:
Pure substances are untouched substances.
Homogeneous mixtures are in uniform.
Heterogeneous mixtures are un-uniform.
Show work please ?...........
Answer:
NO
Explanation:
NO NO NO
i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)
How many moles of I2 are in 8.23 moles of NaI ?
Answer: 4.12
Explanation:
we know that the given mol is 8.23 mol and they are 2NaI and I2 so we will write the equation like this.
8.23mol NaI x 1mol of I2 ÷ 2molNaI = 4.115≅ 4.12 mol of I2
we placed NaI at the bottom to cancel out with the 8.23 mol of NaI
Please help pretty please
Answer: Its is a field generated by any two objects touching each other.
OR
Answer: Its is a field generated by any object with any mass.
Explanation: I AM SOOOO SORRY if i get it wrong i pretty sure the first one is right i mean like My first ansewr i typed in......... :/ :/
What temperature does neon condensate?
Answer and Explanation:
I believe −246.048 C or −411 F
Which statement best describes the effects chemicals may have on the
environment?
A. The effects of chemicals on the environment are easy to observe.
B. Some chemicals may help the environment.
C. All chemicals harm the environment.
D. Chemicals must be released in large amounts to affect the
environment.
A 1500 N force gives an object an acceleration of 3 m/s2.
What is the mass of the object?
Answer:
500kg.
Explanation:
Newton's Second Law relates force, mass and acceleration to one another through the equation:
F = ma
We can rearrange this equation algebraically to solve for mass:
m = F/a
Substituting our known values for the variables, we get:
m = 1500N/3m/s2
So mass of the object is 500kg.
We know it's kg because Newtons (N) are a unit defined as 1 kg/m/s2, so m/s2 cancels out when we divide :)
A small cart with a mass of 3.0 kg is accelerated from rest and obtains a final velocity of 24 m/s, East in 8.0 s. If friction is neglected, what net force is applied.
a
24 N
b
8.0 N
c
72 N
d
9.0 N
Answer:
A.
Explanation:
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Which of the following is a true statement about bacteria, based on what Tim and Moby explained??
A: Bacteria exist in only a few environments on Earth.
B: Bacteria can grow to extremely large sizes.
C: Mast bacteria are harmful to humans
D: Bacteria can be both harmful and helpful to humans.
Extra points for help
Answer:
D: Bacteria can be both harmful and helpful to humans.
Explanation:
Hope this helps
An atom will be neutral if which of the following are true of its arrangement of subatomic particles?
The number of its protons is equal to the number of its electrons
All of its electrons orbit its nucleus at exactly the same distance
The sum of the atom's protons and neutrons is greater than zero
The nucleus of the atom contains more neutrons than anything else
Nitrogen gas reacts with hydrogen gas to produce ammonia according to the following equation.
N2(g)+3H2(g) → 2NH3(g)
What is the mole of ammonia produced from 7.23 x 10−4 moles of the hydrogen reactant, assuming there is sufficient nitrogen to react?
7.23 x 10−47.23 x 10−4
8.42 x 10−38.42 x 10−3
4.82 x 10−44.82 x 10−4
4.83 x 10−3
Answer:
4.82 x 10^-4
Explanation:
7.23 x 10^-4 mol H2 l 2 mol NH3
------------------------------------------------------- =
l 3 mol H2
(7.23 x 10^-4) x 2 / 3 =
4.82 x 10^-4
Hope this helped! ;)
The mole of ammonia produced from 7.23 x 10⁻⁴ moles of the hydrogen reactant when there is sufficient nitrogen to react is 4.82×10⁻⁴.
What is moles?Moles is a unit which is used to estimate the amount of any substance and it is represented as:
n = W/M , where
W = given mass
M = molar mass
Given chemical reaction is:
N₂(g) + 3H₂(g) → 2NH₃(g)
In the question it is given that sufficient moles of N₂ is present, so the formation of product depends on the moles of H₂. From the stoichiometry of the reaction, it is clear that:
3 moles of H₂ = produce 2 moles of NH₃
7.23×10⁻⁴ moles of H₂ = produce 2/3 × 7.23×10⁻⁴=4.82×10⁻⁴ moles of NH₃
Hence, option (C) is correct i.e. 4.82×10⁻⁴.
To know more about moles, visit the below link:
https://brainly.com/question/1464305
How many ions are in the following compounds?
a. (NH4)3PO4 =
b. NaCl =
Answer:
A- In (NH4)3PO4 there are four ions in total as three ions of NH₄ and is one ion of PO₄
How can changing the reaction conditions influence the yield of a chemical reaction?
please explain in detail
Answer:
I found this on the web hope this helps.
Explanation:
Le Châtelier's Principle states that a change in pressure, temperature, or concentration will push the equilibrium to one side of the chemical equation. So, if you manipulate the conditions to favor the product side, you increase the yield and vice versa.
I need helps plss!!!!
Answer:
Copper = 2 Boron = 12 (copper and boron combined = 14)
Explanation:
the number after the element is the amount of atoms there is
What is the charge on an atom after it gains two electrons during the formation of a bond?
One negative charge
One positive charge
Two negative charges
Two positive charges
two negative charges because electrons have a negative charge
word equation for Na2O+H2O → NaOH
Answer:
Sodium oxide + Water - - - > Sodium Hydroxide.
Freezing and thawing water can cause a rock to break down into smaller pieces. Which part of the rock cycle is this an example of?
melting
weathering
subsidence
deposition
Answer:
Deposition
Explanation:
It’s breaking down the rock :]
Answer:
deposition
Explanation:
Ap3x
Pleaseeee help pretty please
Answer:
A object made from iron .
Explanation:
9. What does C12 (g) represents?
A. Chlorine ions
B. Chlorine liquid
C. Chlorine gas
D. Chlorine atom
Answer:
chlorine gas since it exists as a diatomic molecule
Can anybody do this?
Answer:this should be c
Explanation:
How many grams of NaN3 are required to produce 283 L of nitrogen gas about the size of an automotive air bag, if the gas has a density of 1.25 g/L? Please answer ASAP
3.300
bc im right fgdfgdffffffffg
True or false: Equal but opposite forces pushing on the same object produce a net force of zero on the object.
Answer:
true.................
Answer:
the answer is true hope it helps