Answer:
The balanced chemical equation:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)
Explanation:
(a): The balanced chemical equation:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)
(b): Determine moles of each reactant:
(5.34 g C3H8) × (1 mol C3H8 / 44.11 g C3H8) = 0.1211 mol C3H8
(25.2 g O2) × (1 mol O2 / 32.00 g O2) = 0.7875 mol O2
According to the chemical equation above: n(C3H8) = n(O2)/5
Choose one reactant and determine how many moles of the other reactant are necessary to completely react with it. Let's choose C3H8:
n(O2) = 5 × n(C3H8) = 5 × 0.1211 mol = 0.6055 mol
The calculation above means that we need 0.6055 mol of O2 to completely react with 0.1211 mol C3H8.
We have 0.7875 mol O2 and therefore more than enough oxygen.
Thus oxygen (O2) is in excess and tricarbon octahydride (C3H8) must be the limiting reactant.
The limiting reactant is tricarbon octahydride (C3H8).
(c):
(5.34 g C3H8) × (1 mol C3H8 / 44.11 g C3H8) × (4 mol H2O/ 1 mol C3H8) × (18.02 g H2O / 1 mol H2O) = 8.726 g H2O
8.726 grams of water (H2O) is produced.
(d):
0.7875 mol O2 - 0.6055 mol of O2 = 0.182 mol O2 (excess O2)
(0.182 mol O2) × (1 mol O2 / 32.00 g O2) = 5.824 g O2
5.824 grams of oxygen gas (O2) is left over after the reaction is complete.
(e):
%H2O = (6.98 g / 8.726 g) × 100% = 79.99% = 80.00%
The percent yield of water (H2O) is 80.00%.
which one is? Will give brainliest
Answer: 2Cr + 3Br2 Yields 3CrBr3
Explanation:
We know that 4a is not balanced because there are 3 Nitrogen atoms on the reactants side and 2 on the products side.
We know that 4c is not balanced because there are 4 Chlorine atoms on the reactants side and 2 on the products side. (Remember there are 2 Cl2 atoms. Therefore, 2 times 2 means there are 4 Chlorine atoms on the reactants side)
Finally, we know the answer is not 4d because there is 1 Potassium on the reactants side and 2 potassiums on the products side.
Therefore, the answer must be 4b, which contains 2 Chromium atoms and 6 bromine atoms on each side
Mazlan menjelaskan lidah sebagai kulit yang mempunyai rasa.Adakah anda setuju dengan penjelasan lidah sebagai kulit?Jelaskan jawapan anda
Answer:
tidak
Explanation:
kerana lidah bukan kulit,lidah ialah organ badan untuk merasa sesuatu,kulit kita hanya untuk mengeluarkan peluh bukan untuk merasa
For the balanced equation shown below, how many moles of N2 reacted, if 155 moles of NH3 are produced?
3H2 + N2 => 2NH3
Answer: 1 mole nitrogen produces 2 moles ammonia
How many moles you need for 155 mol ammonia?
155/2 moles
Explanation:
What does chemistry mean?
Answer:
The definition of chemistry is a branch of science that deals with the form and properties of matter and substances or the interaction between individuals.
Can you please help me it’s not a hard question
Determine the expected mass of the copper after 24 hours
The expected mass of copper element after 24 hours as per graph is 288 grams.
What is an element?It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.In every 10 minutes 2 mg of copper is produced thus after 24 hours that is 1440 minutes copper amount will be 1440×2/10=288 mg.
Thus, the expected mass of copper element after 24 hours as per graph is 288 grams.
Learn more about element,here:
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Where do animals obtain their chemical energy? I WILL MARK BRAINLEST HELP ASAP!!!
from plants only
from plants and animals
from animals only
directly from solar energy
Answer:
from plants and animals.
What does a hygrometer measure?
Answer:
humidityExplanation:
Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity.
Please Help I need to finish this by the end of the day!
Answer:
C
Explanation:
If I am not mistaken, due to the conservation of mass, whatever mass is on the side of the reactants should be the same for the product side.
This means
218.76g+53.96g = 272.72g
272.72g-266.66g = 6.06g
So the answer should be C
Which of the following statements is TRUE about salts
Answer:
salt is salty in taste.......
Multiple choice
In a given chemical reaction, 1 mol of sulfur reacts with 4 moles of chlorine.
4S + 2Cl2
S + 4 Cl2
S + 2Cl2
S + Cl2
Answer:
S + 4 Cl2
Explanation:
Sulphur - S
1 mol of Sulphur = S
Chlorine = Cl2
4 moles of Chlorine = 4Cl2
4S + 2Cl2
Incorrect option
S + 4 Cl2
Correct option
S + 2Cl2
Incorrect option
S + Cl2
Incorrect option
Natasha is learning about density in science class. She has been given three different geometric shapes made from different substances and asked to determine which has the greatest density. She measures the masses of the objects and records her results in the table below
What should Natasha do next to determine the relative densities of the objec
A. She should measure the temperature of each object.
B. She should measure the volume of each object.
C. She should measure the surface area of each object.
D. She should measure the circumference of each object.
Which statement about Bohr’s model of the atom is false?
A. Electrons cannot be between energy levels.
B. Electrons orbit the nucleus.
C. An electron’s path is not known exactly.
D. Electrons exist in energy levels.
The statement which is false about Bohr's model is option C, "an electron's path is not known exactly". Electron's path can be determined using the knowledge of different energy levels.
What are energy levels?Energy levels in an atom is circular paths having fixed energy through which the electrons are revolving around the nucleus. This model of atom was proposed by Niels Bohr.
According to Bohr's atomic model, electrons are revolving through fixed energy levels around the nucleus, where the velocity and momentum of electron and the radius of the atom can be determined using the model.
Bohr's model of atom contributed well to the atomic structure and helped to determine the energy of electronic transitions.
Hence, the statement an electron's path is not known is false.
To know more about Bohr's model, refer the link below:
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I need help with this question
what property of
water is determined
by dissolved Ca2+,
Mg2+ ions?
Answer:
Explanation:
Common cations found in hard water include Ca2+ and Mg2+. These ions enter a water supply by leaching from minerals within an aquifer.
PLEASE HELP I WILL MARK YOU BRAINLIEST !!If you react 4.25 moles of FeCl2, how many moles of Cl2 did you also react?
PLEASE IM BEGGING FOR HELPPPPP
Answer:
2 FeCl2 + Cl2 -> 2 FeCl3
According to numbers in reaction
Amount of Cl2 is half of FeCl2
Explanation:
What is an adaptation?
A.characteristic that has been passed down
B.characteristic that has been recently learned
C.characteristic that has been passed down or recently learned to help survive its environment
D. characteristics that help attract pollinators
Answer:
C
Hope that helps!
Explanation:
Answer:
C. characteristics that has been passed down or recently learned to help survive its environment
1. identify a metal that matches each of the following descriptions. There may be more than one possible metal.
a Reacts slowly with cold water to form a hydroxide.
b Does not react with oxygen when heated.
c Reacts slowly with dilute acid.
d Reacts very vigorously in cold water to form hydroxide.
Answer:
I don't think there is any metal matches with this condition
Transcribe the following piece of DNA ........AAG-CCA-TGA-ACA
Answer:
TTC-GGT-ACT-TGT I could be wrong because A could eather be considered a U or a T, but u could also use UUC-GGU-ACU-UGU
Which type of solute would have the greatest impact on a colligative property?
A. C6H12O6
B. NaCl
heeeeeeeeeeeeeeelpheeeeeeeeeeeeeeelp
Answer:
the mirror forms a virtual inlarged image
Explanation:
Help!!! Would give brainliest
Answer: Acids have a pH of less than 7 and generally form [tex]H^+[/tex] when dissolved in solution. [tex]H_2SO_4[/tex] is an example of acid.
Bases have a pH of more than 7 and generally form [tex]OH^-[/tex] when dissolved in solution. [tex]Ca(OH)_2[/tex] is an example of base.
Water is neutral and has a pH of exactly 7. Therefore in chemical equations it can act as acid or a base.
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution. pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
pH values range from 1 to 14. Acids have a pH range from 1 to 6.9, water is neutral with pH of 7 and bases have pH ranging from 7.1 to 14.
Acids form hydrogen ions when dissolved in water and bases form hydroxide ions when dissolved in water. Water [tex]H_2O)[/tex] is amphoteric and thus can behave as an acid or a base.
[tex]H_2SO_4\rightarrow 2H^++SO_4^{2-}[/tex]
[tex]Ca(OH)_2\rightarrow Ca^{2+}+2OH^[/tex]
2KBr + Cl2 → 2KCl + Brz How many moles of KCl are produced if 8.4 moles of Cl, gas completely react? O 4.2 8.4 16.8 33.6
Answer:
As KBr
is producing lesser moles of product so, KBr
is limiting reactant and produced potassium chloride=
187.74g
how many molecules are in 45.0 g of water
what is a metal that forms two types of oxides and rusts in moisture
Answer:
An example of a metal that rusts is Iron
Answer:
Iron
Explanation:
The metal that forms 2 types in moisture is iron.
what is so unique about the ph scale 7?
Answer:
The pH scale 7 indicates neutral.
Explanation:
Question 2 (5 points)
What is the rock cycle? Select the best two answers from the choices below.
a
b
A concept in geology that describes transitions and relationships among the three main rock types
A way to show how Earth's different spheres interact with one another
The primary indicator of climate change
A series of processes that create and transform the types of rocks in Earth's crust
Uc
Jd
Answer:
A. A concept in geology that describes transitions and relationships among the tree main rock types.
D. A series of processes that create and transform the types of rocks in the Earth’s crust.
Explanation:
A and D are the best two answers from the choices below because they both correctly describe the rock cycle.
The rock cycle which according to Wikipedia is a basic concept in geology that describes transitions through geologic time among the three main types of rock;
1. Sedimentary,
2. Metamorphic and
3. Igneous rocks
A rock cycle can take very long time. It could be thousands or millions of years
Did anyone do this worksheet (science)
What is the definition of Monohybrid cross
Answer:
A monohybrid cross is a cross between two organisms with different variations at one genetic locus of interest. The character being studied in a monohybrid cross are governed by two or multiple variations for a single locus.
Explanation:
A monohybrid cross is a cross between two organisms with different variations at one genetic locus of interest. The character being studied in a monohybrid cross are governed by two or multiple variations for a single locus.
Answer:
a monohybrid crosses a cross between two organisms with different variations at one genetic locus of interest
what's the advantage and disadvantage of using a stopwatch, clamp, thermometer, butanol, methanol, ethanol, propanol and other equipment from the lab
please help me