Answer:
6 moles
Explanation:
hope this helps:)
What is the molar mass of (NH4)2 CO3
Write a balanced chemical equation, complete ionic equation and a net ionic equation for Copper lll sulfate and zinc.
Answer: CuSO4 (aq)+ Zn (s) → Cu (s) + ZnSO4(aq)
Explanation: do you mean copper II sulphate CuSO4?
how many grams of oxygen gas are there in a 2.3 L tank at 7.5 atm and 24 C
Answer:
22.6 g
Explanation:
First we use the PV=nRT equation:
P = 7.5 atmV = 2.3 Ln = ?R = 0.082 atm·L·mol⁻¹·K⁻¹T = 24 °C ⇒ 24 + 273.16 = 297.16 KWe input the data:
7.5 atm * 2.3 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 297.16 KAnd solve for n:
n = 0.708 molThen we convert 0.708 moles of oxygen gas (O₂) to grams, using its molar mass:
0.708 mol * 32 g/mol = 22.6 gmolecular formula citric acid2.A 10.0 mL sample of pineapple juice was titrated with 0.100 M sodium hydroxide solution. The average volume of NaOH required to reach the endpoint was 12.8 mL. a.Calculate the number of moles of sodium hydroxide required to reach the endpoint. Show your work in equation editor. Remember to use units and report your answer to the proper number of significant figures.
Answer: The number of moles of sodium hydroxide required to reach the endpoint is 0.00128
Explanation:
To calculate the number of moles for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}[/tex]
Molarity of [tex]NaOH[/tex] solution = 0.100 M
Volume of [tex]NaOH[/tex] solution = 12.8 mL
Putting values in equation, we get:
[tex]0.100M=\frac{\text{Moles of}NaOH\times 1000}{12.8ml}\\\\\text{Moles of }NaOH=\frac{0.100mol/L\times 12.8}{1000}=0.00128mol[/tex]
Thus the number of moles of sodium hydroxide required to reach the endpoint is 0.00128
PLZ HELP ILL GIVE BRAINLIEST PLS 20 POINTS!!!.
Energy generated from wind has both advantages and disadvantages. What is true about wind energy?
No greenhouse gases are given off by wind power, but payback for construction takes many years.
Some erosion occurs around the towers of wind turbines, but electrical fires are highly unlikely.
There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use.
Modern turbines are safe for birds and bats that fly in the area but can reduce the number of crops grown on farmland.
Explanation:
I wanna go with the 3rd option
Answer:
Its "There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use."
Explanation:
Yw! :D took the test
Organelles carry out specif functions within the cell. True False
Answer:
true
Explanation:
Most ecosystems originally get their energy from
4 points
1. What is the main source of energy for this food chain? *
Sun
Plants
Fish
Turtles
Sharks
O fish
O turtle
sun
O shark
Answer:
sun
Explanation:
all of the other things get their energy from the Sun
Answer:
sun
Explanation:
the sun is the main source of energy for plants, which are at the bottom of the food chain.
PLEASE HELP
Solids that do not form a crystalline structure are called.......
I don't remember what they are called
directs all of the cell's activities.
a Endoplasmic Reticulum
b cell membrane
c Nucleus
d cytoplasma
PLS ANSWER I WILL MARK U BRAINLIEST AND GIVE U THANK U
A student learns that salts like potassium chloride and sodium chloride are introduced in a weekly conducting solution. What option explains the chemical reactions that salts undergo and affect the conductivity of the solution?
a.Salts react chemically with the water particles and decrease the conductivity of the solution
b. Salts help to make the solution non-conducting by reacting with the particles of the solution
c. Salts mix with the particles of the weak conducting solution and helps to produce oxygen from the solution
d. Salts undergoes a chemical reaction with the particles of the solution and increase its conductivity
Answer:
d. Salts undergoes a chemical reaction with the particles of the solution and increase its conductivity
Explanation:
Salt compounds like potassium chloride (KCl) and sodium chloride (NaCl) mentioned in this question have the ability to disintegrate into their respective ions or charged atoms when dissolved in water. For example;
NaCl (aq) → Na+ + Cl-
However, these ions (Na+ and Cl-) are responsible for the ELECTRICAL CONDUCTIVITY of a solution. Hence, a salt compound when placed in an aqueous solution will form ions, which will conduct electricity. Hence, salinity of a solution increases its conductivity.
According to this question, salts undergoes a chemical reaction to with the particles of the solution to form ions that increase its conductivity.
Which is an advantage of selling plant fertilizer as a powder rather than as a liquid?
Choose one.
A. The powder must be stored in a childproof container.
B.Transportation costs are reduced.
C.The powder may be a health hazard if proper procedures are not followed during mixing.
D.The gardener has to be able to read directions carefully and mix the proper amount of solvent and solute.
Answer:A
Explanation: because i saw the sheet
Is grilling a ham and cheese sandwich and chemical or physical change?
Answer:
Physical
Explanation:
I say physical because if you just think about the cheese it wasnt melted before u put that heat on it .
For the reaction
C2H4(g) + 302(g) → 2002 (g) + 2H20 (8)
if 6.0 mol of CO2 are produced, how many moles of Oz were reacted?
4.0 mol
0 7.5 mol
9.0 mol
o none of these
O 15 mol
Answer:
9.0 mol
Explanation:
C₂H₄(g) + 3O₂(g) → 2CO₂ (g) + 2H₂O (g)In order to convert from moles of CO₂ to moles of O₂, we need to use the stoichiometric coefficients in the balanced reaction. We use a conversion factor that has moles of CO₂ in the denominator and moles of O₂ in the numerator:
6.0 mol CO₂ * [tex]\frac{3molO_2}{2molCO_2}[/tex] = 9.0 mol O₂i need help can someone help. pls
Meredith mixes together 5 grams of baking soda and 5 grams of vinegar in a test tube that is not sealed. She then weighs the product and
finds that it weighs 9 grams. Mathew conducts the same experiment, except in a sealed bag. He finds that 5 grams of baking soda and 5
grams of vinegar will result in 10 grams of product. Which of the following might account for their different findings?
O A. Some of the mass was created during the reaction between vinegar and baking soda in the bag.
OB. Some of the mass of the reactants was converted to light.
O C. Some of the mass escaped from the test tube as a gas before it was massed.
OD. Some of the mass from the test tube was destroyed.
Answer:
simple chemistry experiment—adding baking soda to vinegar—seems to challenge the law of conservation of mass.
Some of the mass escaped from the test tube as a gas before it was massed. Hence option C is correct.
What is experiment?Experiment is defined as a process used to confirm or deny a hypothesis, as well as assess the likelihood or effectiveness of a previously untested idea. Additionally, experiments are used by researchers to confirm or refute new or current theories. The structure or mathematical form of a theory can be hinted at by an experiment, and it can also provide proof that the entities involved in our theories actually exist.
Something new is created when vinegar and baking soda are combined. Carbon dioxide gas soon foams up in the mixture. All of the baking soda can be made to react and dissolve into the vinegar solution if enough vinegar is utilized.
Thus, some of the mass escaped from the test tube as a gas before it was massed. Hence option C is correct.
To learn more about experiment, refer to the link below:
https://brainly.com/question/11256472
#SPJ2
Select the statements that are true regarding open tubular and packed columns in gas chromatography.
A. For similar analysis times, open tubular columns provide better resolution than packed columns.
B. Packed columns offer increased sensitivity to small sample sizes.
C. Packed columns have a greater sample capacity than open tubular columns.
D. Open tubular columns give better resolution but longer analysis separation times compared to packed columns.
E. Packed columns give broader peaks with longer retention times.
Answer:
true or false :-
a) yes
b) no
c)yes
d)yes
e)no
For similar analysis times, open tubular columns provide better resolution than packed columns, Packed columns have a greater sample capacity than open tubular columns and Open tubular columns give better resolution but longer analysis separation times compared to packed columns are true regarding open tubular. Hence, options A, C and D are correct.
What is gas chromatography used for?The chemical constituents of a sample mixture are identified, separated, and quantified using an analytical technique called gas chromatography.
Gas chromatography is a technique for separating compounds in mixtures by injecting a gaseous or liquid sample into a mobile phase, which is usually referred to as the carrier gas, and passing the gas through a stationary phase. The mobile phase is often composed of an inert gas or an unreactive gas, such as helium, argon, nitrogen, or hydrogen.
Thus, options A, C and D are correct.
For more information about gas chromatograph, click here:
https://brainly.com/question/13565117
#SPJ2
What is the definition of a Lewis acid?
A. A Lewis acid accepts an electron pair from a base.
B. A Lewis acid donates a proton to the solution.
C. A Lewis acid accepts a hydroxide from the solution.
D. A Lewis acid donates an electron pair to a base.
Answer:
A. A Lewis acid accepts an electron pair from a base
Explanation:
PLATO
The definition of a Lewis acid is that a Lewis acid accepts an electron pair from a base.
What is a base?
According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
Learn more about base,here:
https://brainly.com/question/12445440
#SPJ7
2. Which of the following are reactants of photosynthesis? *
a. carbon dioxide, water and light energy
b. glucose and oxygen
c. carbon dioxide, water and ATP
d. carbon dioxide, glucose and light energy
Answer:
A is the answer.
In terms of activation energy, why does increasing the temperature of a
reaction make it proceed more quickly?
A. Increasing the temperature reduces the activation energy.
B. Increasing the temperature increases the potential energy of the
reactants.
O C. Increasing the temperature increases how many reactant
molecules reach activation energy.
D. Increasing the temperature makes the molecules move slower.
Increasing the temperature increases the potential energy of the reactants, thus making the reaction faster.
What is activation energy?Activation energy is the minimum energy that reactant molecules must possess in order to collide together to form products.
Increasing the temperature of a reaction helped to make the reaction proceed faster. This is because more reactant particles acquire the energy greater than or equal to the activation energy.
Therefore, increasing the temperature of a reaction makes it proceed more quickly.
Learn more about activation energy at: https://brainly.com/question/26724488
#SPJ2
One essential step in the manufacture of many plant fertilizers is the production of nitrogen monoxide gas, NO(g). This step is represented by the following balanced equation: 4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(l)
Determine the amount of oxygen needed to produce 1.2 x 104 mol of nitrogen monoxide gas.
Answer: 1.5 moles, or 48 grams
Explanation:
Set up the following:
[tex]\frac{1.2 x 10^4 mol NO}{1}[/tex] × [tex]\frac{5 mol O2}{4 mol NO}[/tex] = 1.5 moles of O2 needed
If you're also looking for the number of grams needed:
[tex]\frac{1.5 mol}{1}[/tex] × [tex]\frac{32 g}{1 mol}[/tex] = 48 grams needed
PLS HELP ASAP. *IF* THE ANSWER IS CORRECT I'LL MARK YOU AS BRAINIEST:
Which is an example of mechanical weathering?
a) iron oxide
b) water moving over rocks
c) limestone cave formations
d) hydrated minerals
Answer: C: limestone cave formations
High Melting points
Ionic or covalent
ionic
hope this help you
have a good day
if you can please give me Brainliest thanks
What is the molarity of a solution that contains 45 mEq Ca“ per liter?
Answer:
0.0225 M
Explanation:
In one liter of this solution, there are 45 mEq of Ca⁺².
1 mEq of Ca⁺² is equal to 20 mg of Ca⁺. We know this by dividing its molar mass (40) by the charge of the ion (2).
Meaning that 45 mEq of Ca⁺² is equal to (45 * 20) 900 mg of Ca⁺².
Now we convert 900 mg of Ca⁺² into moles, using its molar mass:
900 mg / 1000 = 0.9 g0.9 g Ca⁺² ÷ 40 g/mol = 0.0225 mol Ca⁺²Finally we calculate the molarity of the solution:
Molarity = moles / liters0.0225 mol / 1 L = 0.0225 MHELP NEED THIS BADLLLLY !!!!!!!!!
Answer:
2 is correct
Explanation:
My friend for you this answer
Not sure if my answers are even correct. i am so confused
Answer:
#3 is the percentage for sodium i believe and 4 is right
Explanation:
The diagram below represents H2 and Cl2 molecules that will potentially react to form HCI.
Hydrogen
Chlorine
Which of the following best describes this reaction?
А
The limiting reactant is chlorine.
B
The percent yield will be greater than 100%.
с
Hydrogen and chlorine are nonreactive.
D
All molecules shown will react to form the product.
The limiting reactant is chlorine in the given reaction of hydrogen and chlorine. Therefore, the correct option is option A.
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical atom bonds are formed and broken during chemical reactions, which traditionally only involve changes in the locations of electrons.
The study of chemical processes involving unstable and radioactive materials, where both electronic or nuclear changes may take place, is known as nuclear chemistry. The limiting reactant is chlorine in the given reaction of hydrogen and chlorine.
Therefore, the correct option is option A.
To know more about chemical reaction, here:
https://brainly.com/question/29039149
#SPJ5
Pretty easy question if you know science. 20 Points
A piece of nickel at 25 °C is dropped into a glass of water at 25 °C. Which statement is correct?
Heat will flow from the nickel to the water in the glass.
Heat will flow from the water in the glass to the nickel.
There will be no transfer of heat from the nickel to the water in the glass.
The final temperature of water and nickel will be 0 °C.
Answer:
C.
Explanation:
because the heat From the nickel and the heat from the water are the same.
As a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.
To answer the question, we need to know what heat transfer is.
What is heat transfer?This is the flow of heat energy from one body to another over a temperature gradient.
Heat transfer between Nickel at 25 °C and water at 25 °C.
Since a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there is no temperature gradient, since, both bodies are at the same temperature. Thus, no heat is transferred from the nickel to the water.
So, as a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.
Learn more about heat transfer here:
https://brainly.com/question/20493362
The physical properties of element X are shown in the table below.
Physical Properties of X
malleable
ductile
shiny
conducts heat
conducts electricity
Which most likely represents the identity of element X?
O A. iodine (1)
OB. sulfur (S)
OC. copper (Cu)
OD. carbon (C)
Answer:
Copper
because it is metal and all the above property
matches with copper properties
so answer of this question is copper
CS2(g) + 3 O2(g) → CO2(g) + 2 SO2(9)
16. CS2 reacts with O, to produce CO2 gas and SO, gas as shown above. Identify the limiting reactant
when 192 g O, is added to 4.50 mol CS2
A CS2
B. O2
C.CO2
D. SO