Answers
Answer:
a
Explanation:
Related Questions
For the balanced equation shown below, if the reaction theoretically
should produce 7.99g CaO but experimentally produces 6.81 grams of
CaO, what is the percent yield?
CaCO3---->CaO+CO2
85.23%
0 14.77%
54.41%
O 117.33%
Answers
Answer:
Percent yield = 85.23%
Explanation:
Given data:
Theoretical yield = 7.99 g
Actual yield = 6.81 g
Percent yield of CaO = ?
Solution:
Formula:
Percent yield = ( actual yield / theoretical yield ) × 100
by putting values,
Percent yield = (6.81 g/ 7.99 g) × 100
Percent yield = 0.8523× 100
Percent yield = 85.23%
An element whose particles are atoms
Answers
Answer:
a chemical element
Explanation:
A chemical element is a substance that contains only one type of atom
NEED HELP NOW!!!!!! Suppose two chemicals are reacted together. It takes 600 kJ of energy to break the bonds of the reactants and 950 kJ of energy are released by the formation of the products. What is AH for the reaction?
O kJ
0-600 kJ
600 kJ
-350 kJ
Answers
Answer:
600 kj
Explanation:
thats just the answerr
Given 5 Moles of H20. how many moles of O, are produced. Use the following Equation
2H2+O2->2H2O
Answers
Moles O2 required : 2.5
Further explanationGiven
Reaction
2H2+O2->2H2O
Required
Moles of O2
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants or products)
From the equation, mol ratio of H2O : O2 = 2 : 1, so moles O2 :
= 1/2 x mol H2O
= 1/2 x 5 moles
= 2.5 moles
BRAINLIST!!!
Water moving along the water cycle also moves through the Earth's environment in the form of rain, ice, snow, and surface water. This water has helped to shape the Earth's surface by which of the following processes?'
radioactive decay
chemical weathering
dissolving
physical weathering
oxidation
Answers
Answer:
I believe it is chemical weathering, physical weathering, oxidation, and dissolving...
Explanation:
How many moles of Fe2O3 were used to produce with 11.5 moles of CO2 ?
Answers
Moles of Fe2O3 used : 3.83
Further explanationGiven
11.5 moles of CO2
Required
moles of Fe2O3
Solution
Reaction
Fe2O3 + 3CO ⇒2Fe + 3CO2
The reaction coefficient shows the mole ratio of the reacting compound (reactants or products)
From the equation, mol ratio of Fe2O3 : CO2 = 1 : 3, so mol Fe2O3 :
= 1/3 x moles CO2
= 1/3 x 11.5
= 3.83 moles
If ice is added to a large fish tank and a small fish bowl, both at the same termperature, the large fish tank's water will cool faster because there is more water.
TRUE OR FALSE
Answers
because the smaller bowl of water has less volume to cool off with the ice than the large fish tank
Answer: False
Explanation:
When a object is touching a surface, it mostly likely will change the temperature it's on, depending on how it is. Since they both have different temperatures and cooling down at the same particularity rates, it is highly false that this would happen. What WOULD would the bowl cool faster THAN the water, then the ice will transform into water.
Hope this helps and make sure to thank me!
I need help with this one question
Answers
Answer:
colder
Explanation:
An object of mass 800g hangs on a spring.Calculate the force exerted by the object if acceleration due to gravity is 10meters per second square
Answers
The force exerted : 8 N
Further explanationGiven
mass = 800 g
Acceleration = 10 m/s²
Required
The force exerted
Solution
Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
∑F = m. a
[tex]\large {\boxed {\bold {a = \frac {\sum F} {m}}}[/tex]
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
Input the value :
F = 0.8 kg x 10 m/s²
F = 8 N
PLs help mweee Ill mark brainliest
Answers
the 3rd one is the answer
how many vitamin c tablets is 250mg? (i’ll give brainliest)
Answers
Which of the following is not a trend that varies systematically in the periodic table
A ) electronegative
B) Symbol of elements
C) ionization energy
D) atomic radius
E) Ionic radius
Answers
Answer: B: Symbols of Elements
Explanation:
The periodic table is a table of chemical elements that shows us the trends and characteristics of the elements. The periodic trends are a specific pattern of the major and minor elements.
The trends are shown by the electronegativity, ionization energy, electronic affinity, ionic radius, atomic radius, and chemical reactivity. This trend arises from the changes in the atomic structure of the chemical elements.This pattern is based on the periodic laws and states that the chemical elements are put in order of increasing atomic number. However, they don't follow the symbols of elements.Hence the option B is correct.
Learn more about the is not a trend that varies systematically in the periodic table.
brainly.com/question/14214326.
9. John checked his car tire volume when the temperature outside was 80 °F. He was
happy to see that the tires were inflated properly to 10 L. The temperature the next
day was a record low for the time of year he was in. He noticed that his tires all
looked sort of flat. He checked the volume again and found the volume of air was
half what it was the day before. What temperature was the record low?
Answers
In a modern periodic table the element are arranged in order of increasing
Answers
Answer:
what are you asking?
Explanation:
How many moles is 0.025 g of NaCO3? (Show Your Work)
Answers
mol of Na2CO3 = 2.36 x 10⁻⁴
Further explanationGiven
Mass : 0.025 g of Na2CO3
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
mol = mass : molar mass
mass = mol x molar mass
Input the value :
mol = mass : MW Na2CO3
mol = 0.025 g : 106 g/mol
mol = 2.36 x 10⁻⁴
Α. Helium (He)
В. Beryllium (Be)
C. Phosphorus (P)
D. Sulfur (S)
Answers
Answer: d
Explanation:
1. What does the Law of conservation of mass state?
a. According to the Law of Conservation, what is true about the masses of the reactants and the products in a chemical reaction?
b. Find the missing mass in the reactions below:
MgO + H2O → Mg(OH)2
12.4 g ? 21.8
Answers
Answer:
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
i’ll give Brainliest please answer also i know this isn’t chemistry but brainly doesn’t have science
Answers
the answer would be iron. divide mass by volume to get density.
Answer:
B. Iron
Explanation:
Correct
True or false: Oceans have no effect on the temperature on Earth’s land???
Answers
Answer:
false
Explanation:
How many chemical changes can something go through
Answers
Answer:
Only one
Explanation:
Which of the following represents a neutralization reaction which hydrofluoric acid and sodium hydroxide(a base) react to produce sodium choride(a salt) and water? 
Answers
Explanation:
A neutralization reaction is a reaction that involves an acid and a base.
When an acid reacts with a base to produce salt and water only, the reaction is said to be a neutralization reaction.
Acid + Base → Salt + Water
Such reactions are classified as a double displacement reaction in which a non-ionizing product is formed
A barometer is a tool that scientists use to measure dew point , rainfall amounts, temperature, air pressure helppppp
Answers
Answer:
All of that is correct i am confused on what u are asking us to answer
Explanation:
Answer:
A barometer measures atmospheric/ air pressure ( D)
Explanation: I researched this topic prior to answering the following question.
SrBr2 lewis structure
Answers
Answer:
Okay?.......................
If you need 2.5 moles of Rb2Cr7, how many grams do you need?
Answers
Answer:
0
Explanation:
Which of the following shows the proper configuration of a straight chain isomer of nonane?
A.)A
B.)B
C.)C
Answers
Answer:
I need help with this as well if you get the answer please let me know
Explanation:
What is the acceleration at 5s?
Answers
Answer:
-10 divided by 5=-2m/s squared
Explanation:
Answer:
A body falls for 5s from rest. If the acceleration due to the gravity of earth ceases to act, The distance travels in the next 3s is.
Explanation:
hopeot help you
A chip is burned beneath an aluminum container holding 28.7 g of water causing the temperature of the water to increase from 11.3 °C to 33.2 °C. How many joules of heat were absorbed by the water? Water’s specific heat is 4.18 J/gºC
Answers
Answer:
Q = 2627.25 J
Explanation:
Given that,
The mass of water, m = 28.7 g
The temperature of the water to increase from 11.3 °C to 33.2 °C
The specific heat of water is 4.18 J/gºC
The heat absorbed by the water is given by :
[tex]Q=mc\Delta T\\\\Q=28.7 \times 4.18 \times (33.2-11.3)\\\\Q=2627.25\ J[/tex]
So, 2627.25 J of heat is absorbed by the water.
Which is an example of kinetic friction?
friction between a car’s windshield and the air as you drive into the wind
friction between a sticky note and the page of a book as it marks your place
friction between your shoes and the ground when you stand still
friction between your skin and a pencil as it rests in your palm
Answers
Answer: friction between a car's windshield and the air as you drive into the wind.
Explanation: Hope this helps :)
Chemical properties describe matter based on its ability to change into___
A. A new substance
B. The same thing
C. Water
D. A powder
Answers
Answer:
A. A new substance
Explanation:
sorry if its wrong if its right your welcome <3
How does the molecular formula of a compound differ from the empirical formula? Can a compound’s empirical and molecular formulas be the same? Explain.