Remember mass/atoms is not created or destroyed. Atoms don't appear and disappear. Mark the only balanced equation below.
Answer:
The answer is Option 4
Explanation:
In what ways are you being physical activie in a typical day?
(Thanks for the recent help this should be my last question for right now until I got a new one)
which of the following is an example of a solution?
A. Chex mix
B. Fruit Salad
C. Peanuts and candy corn
D. Salt water
Answer:
I`m pretty sure its salt water
Explanation:
which of the following has a mass of 10.0g
Answer: 0.119 mole of Kr has a mass of 10.0 g
Explanation:
The complete Question was ontained online, albeit, it was incomplete, even from the online source. But the solution is possible based on the part of the question obtained.
Complete Question
Which of the following Noble Gases has a mass of 10.0 g?
A. 2.02 mol Ne B. 0.119 mol Kr C.
Solution
Number of moles = (Mass)/(Molar Mass)
Mass = (Number of moles) × (Molar mass)
Checking the options, one at a time,
A. 2.02 moles of Neon
Number of moles = 2.02 moles
Molar Mass of Neon = 20.1797 g/mol
Mass = 2.02 × 20.1797 = 40.762994 g ≠ 10.0 g
Not the answer.
B. 0.119 moles of Krypton
Number of moles = 0.119 moles
Molar Mass of Krypton = 83.798 g/mol
Mass = 0.119 × 83.798 = 9.971962 g ≈ 10.
Explanation:
hope this helps have a great night ❤️❤️❤️
What does a chemical equation do?
Answer:
A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow. In a balanced chemical equation, the numbers of atoms of each element and the total charge are the same on both sides of the equation.
Answer:
chemical equation and chemical reaction
Explanation:
chemical equation is the symbolic representation Of a chemical reaction in the form of symbols
Organisms that are made up of prokaryotic cells are NOT ____________.
Question 3 options:
Bacteria
Multicellular
Simpler than organisms made up of Eukaryotic celled organisms
All of these are true about prokaryotic cells
Answer:
Multicellular
Explanation:
Prokaryotic cells are unicellular because the do not have a nucleus and lack organelles, while eukaryotic cells do have a nucleus, have organelles, and are are multicellular. :)
Organisms that are made up of prokaryotic cells are NOT
Multicellular.
Classification of Organisms based on cellular organisation.Living organisms can be classified based on their cellular organisation.
Organisms that are made up of one cell are known as unicellular organisms.
Organisms that are made up of more than one cell are known as multicellular organisms.
A prokaryote is an organism that lacks distinct nucleus while eukaryote is an organism that possess a nucleus that is enclosed in a nuclear envelope.
While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular.
Therefore, organisms that are made up of prokaryotic cells are not multicellular.
Learn more about multicellular here:
https://brainly.com/question/2515155
1. How many particles are in 8.14 moles of Na?
Answer:
8.14x6.022×10^23 ~ 4.901908x10^24
Explanation:
URGENT!!
Which substance is reduced in this following reaction? (which element goes through reduction).
Explain! (define what's going on, etc)
2Mg + O2 --> 2MgO
Answer:
i think it's oxygen
Explanation:
the smart kid in my class said so lol
What is the volume of 2.0 mol CO2 at STP?
Answer:
44.8 litres is the answer to the question
Which of the following particle diagrams represents a mixture?
Answer:
???
Explanation:
i would help answer but your post has no diagrams or at least there not showing up
scale of 1 to 10 how pretty is this image
Answer: 10 always love yourself
Explanation:
What question did this young man have about his father? und
Which part(s) of a microscope forms an enlarged image of a specimens?
A: The light source
B: The focus knobs
C: The stage
D: The objective lenses
On a recent day the difference between the lowest temperature at the highest temperature of the day was 9*C. By how many degrees fahrenheit did the temperature change
Answer:
48.2 Fahrenheit
Explanation:
Temperature change = 9*C
By how many degrees Fahrenheit did the temperature change?
The relationship between Fahrenheit and degree Celsius is given as;
F = (9 / 5) C + 32
Inserting the value of C;
F = (9 / 5) * 9 + 32
F = 48.2 Fahrenheit
Increasing velocity/height also increases what three things about the spatter
what is a substance combination of different atoms?
Answer:
Brainliest-
Explanation:
What is the answer please tell me
Answer:
you need to include the bottom portion, not enough info
Explanation:
what is the mass in kilograms of 25L of hydrophosphoric acid?
Answer:
0.0345kg is the mass of 25L of the sample
Explanation:
Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.
To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:
Mass in grams:
25L * (1.38g / L) = 34.5g
Mass in kilograms:
34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample
What type of mixture is salad dressing please tell me? Tysm!
Answer:
Salad dressing made with oil vinegar, and herb is a homogeneous mixtures. Because heterogeneus mixture is composed of two or more components which are unequal distributed.
But in normal salad it's heterogeneous
A sample of oxygen gas has a volume of 130.0 ml when its pressure is 0.952 atm. What will the volume of the gas be
at a pressure of 0.974 atm if the temperature remains constant?
Answer:
the volume of the gas when pressure 0.974atm is equal to 127.06ml
Which of the following statements best describe the particles of a liquid?
Answer:
you already have the right answer b
Explanation:
zinc + sulfuric acid → ..........+ hydrogen
Iron+ ....... iron chloride + ......
.......+ hydrochloric acid → zinc chloride +.......
why hydrogen and oxygen atoms are more stable when they form bonds in a water molecule?
The outer shell of electrons is full, so there is no need to gain or lose electrons.
The hydrogen and oxygen atoms are more stable in water molecules as they get a complete valence shell when they bonded with other atoms.
What is the reaction to the formation of water?In a chemical reaction, two or more reactants react with each other under the chemical condition to form two or more products. The Chemical reaction is defined as a reaction two or more reactant components react with each other to form two or more products.
The water is formed by reacting hydrogen and oxygen. The chemical reaction of water formation is shown below.
[tex]H_2(g)+O_2(g)\longrightarrow H_2O(l)[/tex]
The balanced chemical equation can be defined as a reaction where the number of moles of reactants is equal to the number of moles of products.
[tex]H_2(g)+ \frac{1}{2}O_2(g)\longrightarrow H_2O(l)[/tex]
The hydrogen atoms have one electron and the oxygen has two electrons less than the complete valence shell. But in the water molecule, every atom has a complete valence shell so atoms become more stable.
Learn more about water formation, here:
https://brainly.com/question/16046990
#SPJ2
When ethane (C2H6) burns, it produces carbon dioxide and water:
2C2H6(g)+7O2(g)→4CO2(g)+6H2O(l)
How many moles of water will be produced when 3 moles of ethane are burned?
3 moles
6 moles
9 moles
12 moles
Answer:
6 moles
Explanation:
According to stoichiometry and given chemical equation 2C₂H₆(g)+7O₂(g)→4CO₂(g)+6H₂O(l), 9 moles of water are produced when 3 moles of ethane are burned.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.
In the given problem , as 2 moles of ethane produce 6 moles of water so according to stoichiometry
∴ 3 moles of ethane will produce 3×6/2=9 moles
Thus, 9 moles of water are produced when 3 moles of ethane are burned.
Learn more about stoichiometry,here:
https://brainly.com/question/28780091
#SPJ2
GIVING BRAINLIEST!
Calculate the concentration of a solution of sodium chloride if 15g are added to water to make a 200cm³ solution. The answer shoulsd be in units of g/dm³.
Answer:
75 g/dm³
Explanation:
The following data were obtained from the question:
Mass of solute (NaCl) = 15 g
Volume of solution = 200 cm³
Concentration (in g/dm³) =?
Next, we shall convert 200 cm³ to dm³. This can be obtained as follow:
1000 cm³ = 1 dm³
Therefore,
200 cm³ = 200 cm³ × 1 dm³ / 1000 cm³
200 cm³ = 0.2 dm³
Thus, 200 cm³ is equivalent to 0.2 dm³.
Finally, we shall determine the concentration of the solution as follow:
Mass of solute (NaCl) = 15 g
Volume of solution = 0.2 dm³
Concentration (in g/dm³) =?
Concentration (in g/dm³) = mass / volume
Concentration (in g/dm³) = 15 g /0.2 dm³
Concentration (in g/dm³) = 75 g/dm³
Help lol sorry if I’m spamming this is just really hard for me
How does electronegativity affect
bonding? (Think about ionic vs
covalent).
2B + 3H2 2BH3
How many moles of BH3 are synthesized when 27.0 moles of H2 completely react?
Answer: 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.
Explanation:
The balanced chemical equation is:
[tex]2B+3H_2\rightarrow 2BH_3[/tex]
According to stoichiometry :
3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]BH_3[/tex]
Thus 27.0 moles of [tex]H_2[/tex] will produce=[tex]\frac{2}{3}\times 27.0=18.0 moles[/tex] of [tex]BH_3[/tex]
Thus 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.
Almost all of the energy that supports life on Earth comes from _______________________.
Answer:
THE SUN!
Explanation:
Identify the type of reaction and products of the reaction. Mg(OH)2 + Al(NO3)3 ->
Answer:
Double replacement
Mg(NO3)2 + Al(OH)3
Explanation: