Answer:
lemon juice
Explanation:OH is in bases and lemon juice is an acid
Calculate the molarity of a solution prepared by dissolving 6.80 grams of AgNO3 in 2.50 liters of solution.
SHOW WORK:)
Answer:
0.016M
Explanation:
First we find the mole of AgNO3 by using the formula mass/molar mass..
Then we find molarity by the formula mole/volume...
I hope you get this..
A doctor prescribes 1,000 mg of glucosamine (C6H13NO5) per day for a person with osteoarthritis.
How many moles of glucosamine does the patient take each day?
5.60
0.10
5.59×10−3
1.00×10−3
To determine the number of moles of glucosamine in a 1,000 mg dose, first calculate the molar mass of glucosamine (C6H13NO5), which is approximately 179.17 g/mol. Then convert the dose to grams (1,000 mg equals 1 g) and divide by the molar mass to find that the patient takes 0.00559 moles of glucosamine per day.
Explanation:To calculate how many moles of glucosamine a patient takes each day when prescribed 1,000 mg of glucosamine, we need to first determine the molar mass of glucosamine. Glucosamine has a chemical formula of C6H13NO5, so we will sum the atomic masses of its constituent elements: Carbon (C), Hydrogen (H), Nitrogen (N), and Oxygen (O). The molar mass of one mole of glucosamine can be found by adding the molar masses of 6 carbons (≈13.01 g/mol), 13 hydrogens (≈1.01 g/mol), one nitrogen (≈14.01 g/mol), and five oxygens (≈16.00 g/mol), which equals approximately 179.17 g/mol. Next, we convert the prescribed dose from milligrams to grams: 1,000 mg = 1 g. Lastly, we divide the mass of glucosamine in grams by its molar mass in grams per mole to calculate the number of moles.
1 g / 179.17 g/mol = 0.00559 moles (or 5.59×10⁻³ moles), which is the amount of glucosamine the patient takes each day.
The Milky Way Galaxy is one of
in the known universe.
OA) hundreds
OB thousands
C) millions
D) billions
Answer:
there are billions, and more that we haven't yet explored, it is just let the sea only a lot more floaty!
hope this helps
Help ASAP! WILL MARK BRAINLIEST!
What must happen for light to change a material?
Answer:
There should be the refraction for light to change a material.
Answer: change in speed
Explanation: the change in speed causes light Ray's to change direction. This directional change is called refraction.
Which force help keep Earth in orbit
Answer:
the answer the gravity
Explanation:
Name four metals and non-metals, and state
one major use of each
Answer:
Metals
1) Sodium : It is used in the formation of table salt i. e. sodium chloride.
2) Copper : It is used in the wires of electricity due to better conduction.
3) Silver : It is used in wires and for making jewelry.
4) Aurum: It is used for making jewelry.
Non metals
1) Chlorine : It is used in the production of sodium chloride salt which is used in foods.
2) Flourine : It is used in making toothpaste.
3) Hydrogen : It is used in the formation of acids.
4) Oxygen : It is widely used in the production of steel and plastic.
what is the part of an atom that is mostly empty space is the
Answer:atom
Explanation: electron cloud
Students are investigating the relationship between pressure and temperature in gases. They have blown up a balloon with carbon dioxide from an air tank and
connected the balloon to a pressure gauge. The balloon is then submerged in ice or water baths at various temperatures in order to observe the pressure level
after several minutes. What is the flaw in the student's investigation, and how can the students improve their investigation to correctly determine the
relationship?
A The volume and density of the air in the balloon can change, therefore they need to use several different balloons at different volumes to account for
how density and volume affects pressure.
B. The volume of the balloon can change, therefore they need to use a rigid container such as plastic or metal to hold the air
C. The volume of the balloon can change, therefore they need to use several different balloons at different volumes to account for how volume atteots
pressure.
D. The volume and density of the air in the balloon can change, therefore they need to use a rigid container such as plastic or metal to hold the air
Answer:
b
Explanation:
A container has 21.5L of helium gas at a pressure of 245 kPa and a temperature
of 315K. How many moles of helium are in the container?
Answer:
There are 2, 01 moles of helium in the container
Explanation:
We use the formula PV=nRT. We convert of pressure the unit kPa into atm:
101,325 kPa---1 atm
245 kPa ----x= (245 kPa x 1 atm)/101,325 kPa=2,42 atm
PV= nRT ---> n=PV/RT
n= 2, 42 atm x 21, 5 L/ 0,082 l atm /K mol x315K
n=2, 012620871 mol
A frisbee is moving at 11 m/s and has 3.6j of energy. how much does it weigh?
Answer:
0.06 kg
Explanation:
Given data:
Mass of frisbee = ?
Velocity of frisbee = 11 m/s
Energy of frisbee = 3.6 j
Solution:
K.E = 1/2 mv²
Now we will put the values in this formula.
3.6 J = 1/2 m(11m/s)²
3.6 j = 0.5 ×121m²/s² × m
3.6 j = 60.5 m²/s² × m
m = 3.6 j/60.5 m²/s²
m= 0.06 j.m⁻².s²
j = Kg.m².s⁻²
m= 0.06 Kg.m².s⁻² .m⁻².s²
m = 0.06 kg
Using the information in the table to the right
calculate the enthalpy of combustion of each of
the following substances:
acetylene:
KJ/mol
Compound
methane (CHA)
acetylene (C2H2)
ethanol (C2H5O)
carbon dioxide (CO2)
water (H20)
AH, (kJ/mol)
-748
228.77
-235.1
-3935
-241.82
ethanol:
KJ/mol
DONE
Answer: Acetylene : -1,256 kJ/mol
Ethanol : -1,277 kJ/mol
Explanation:
The enthalpy of combustion of acetylene is -1299 kJ/mol and the enthalpy of combustion of ethanol is -1367 kJ/mol.
How to calculate the enthalpy of combustion?To calculate the enthalpy of combustion of each substance, we need to use the equation:
ΔHcombustion = ΣΔHf(products) - ΣΔHf(reactants)
Where ΔHcombustion is the enthalpy of combustion, ΣΔHf(products) is the sum of the enthalpies of formation of the products, and ΣΔHf(reactants) is the sum of the enthalpies of formation of the reactants.
Using the enthalpies of formation (AH) given in the table, we can calculate the enthalpy of combustion of each substance:
Acetylene:
C₂H₂ + (5/2)O₂ → 2CO₂ + H₂O
ΔHcombustion = [2(-393.5) + (-241.8)] - [228.8] = -1299 kJ/mol
Ethanol:
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
ΔHcombustion = [2(-393.5) + 3(-241.8)] - [-235.1] = -1367 kJ/mol
Therefore, the enthalpy of combustion of acetylene is -1299 kJ/mol and the enthalpy of combustion of ethanol is -1367 kJ/mol.
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How many mL of 3.0M HCl are needed to make 300.0 mL of a 0.10M HCl?
a
0.001 mL
b
none of the above
c
10 mL
d
0.10 mL
Answer:
V₁ = 10 mL
Explanation:
Given data:
Initial volume of HCl = ?
Initial molarity = 3.0 M
Final molarity = 0.10 M
Final volume = 300.0 mL
Solution:
Formula:
M₁V₁ = M₂V₂
M₁ = Initial molarity
V₁ = Initial volume of HCl
M₂ =Final molarity
V₂ = Final volume
Now we will put the values.
3.0 M ×V₁ = 0.10 M×300.0 mL
3.0 M ×V₁ = 30 M.mL
V₁ = 30 M.mL /3.0 M
V₁ = 10 mL
balancing this equation
2 C2H2 + O2 CO2 + H2O
Final answer:
Balancing the provided chemical equation for the combustion of ethane results in a balanced equation with integer-only coefficients: 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O, showcasing the adherence to the law of conservation of mass.
Explanation:
The question involves balancing a chemical equation which is a fundamental skill in chemistry. The correct and balanced equation for the combustion of ethane (C2H6) in oxygen is as follows:
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
This equation demonstrates that when ethane (C2H6) combusts with oxygen (O2), it produces carbon dioxide (CO2) and water (H2O). Balancing a chemical equation ensures that there are an equal number of atoms for each element on both sides of the equation, adhering to the law of conservation of mass. This equation is balanced by ensuring there are equal numbers of carbon, hydrogen, and oxygen atoms on both reactant and product sides. After initial attempts that might lead to fractional coefficients, multiplying all coefficients by an appropriate factor to achieve integer-only coefficients is a commonly used strategy as illustrated by the multiplication of each coefficient by 2 in this case.
What seems to be the general relationship between an atom's atomic number and it’s placement on the Periodic Table?
Answer:number of protons in the nucleus and number of electrons in the different shell
explained : determine the position in the periodic table. ... Their position is decided by their Atomic Number which is the number of protons in the nucleus of the atom.
An blank is a group of organisms that can mate and produce offspring that can mate
Answer: specie
Explanation:
A specie is the smallest group of organisms with similar characteristics and are capable of living with each other and breeding together freely. They give rise to young ones (offspring) that resembles the parents and can also breed with organisms of same species.
Examples of species include
- a group of lizards
- a group of human beings etc
A species is defined as a group of organisms that can mate
Explanation:A species is a fundamental unit of biological classification. It comprises individuals that can interbreed and produce fertile offspring, sharing common characteristics. Species diversity is vital to biodiversity and plays a central role in ecology and evolutionary biology studies.
Thus, a species is a group of individual organisms that interbreed and produce fertile, viable offspring. According to this definition, one species is distinguished from another when, in nature, it is not possible for matings between individuals from each species to produce fertile offspring. This reproductive isolation is an important factor in defining species.
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Consider the reaction below. 2 upper N subscript 2 upper O subscript 5 (g) double-headed arrow 4 upper N upper O subscript 2 (g) plus upper o subscript 2 (g).
Answer:
The concentrations of the products and reactants do not change.
Explanation:
The following information is missing:
If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system?
The forward and reverse reactions no longer occur. The rates of the forward and reverse reactions are unequal. The concentrations of the products and reactants do not change. The forward reaction stops at 500 K.Dynamic equilibrium means that the rate of the forward and reverse reactions are equal and different from zero. Then, the concentrations of the products and reactants do not change.
Answer:
c
Explanation:
How many liters are in 555 g of O2
Answer:
388.5
Explanation:
[tex] \frac{555}{32} = 17.34375 \\ 17.34375 \times 22.4 = 388.5 [/tex]
The movement of water between the ground, the atmosphere, and bodies of water is called the
Final answer:
The hydrologic or water cycle is the term for the movement of water between the ground, atmosphere, and bodies of water. It occurs through processes like evaporation, transpiration, condensation, precipitation, surface runoff, and groundwater flow, primarily driven by solar energy and gravity.
Explanation:
The movement of water between the ground, the atmosphere, and bodies of water is called the hydrologic cycle or water cycle. This cycle describes the continuous movement of water as it is evaporated from surfaces like rivers, lakes, and oceans into the atmosphere, forms clouds, precipitates as rain or snow, and returns to the surface. The cycle is driven by solar energy and gravity, moving water through various states: liquid, solid (ice), and vapor.
Water reaches the atmosphere through evaporation, transpiration (from plants), and sublimation (ice to water vapor). It returns as precipitation and may flow over the land as surface runoff or infiltrate into the ground to become groundwater, which slowly moves and can discharge into other bodies of water or return to the ocean.
Please I really need help!!!!!!!
Which example is an exothermic reaction?
A. dissolving sugar in water
B. dissolving ammonium nitrate in water to cool the water
C. oxidation of iron
D. melting ice
An example of an exothermic reaction is : C. oxidation of iron. The Exothermic process involves the liberation of heat.
What is an exothermic reaction?An exothermic reaction is a chemical or physical reaction that gives heat. It takes out energy to its surroundings. The energy needed for the reaction to occur is less than the total energy released.
In the oxidation of iron, the heat is released while all the other processes are endothermic in which is heat is absorbed.
Thus, the correct option is C.
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What is the molarity of a solution made by dissolving 50.0 g of HBr in enough water to
make 600. mL of solution?
Answer:
1.06M
Explanation:
Given parameters:
Mass of HBr = 50g
Volume of water = 600mL
unknown:
Molarity of the solution = ?
Solution:
The molarity of a substance is the number of moles of solute in a volume of solution.
Mathematically;
Molarity = [tex]\frac{number of moles }{volume}[/tex]
Since the number of moles is unknown, let us solve for it;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of HBr = 1 + 80 = 81g/mol
Number of moles = [tex]\frac{50}{81}[/tex] = 0.64mole
Convert the volume to liters or dm³; 600mL = 0.6L or 0.6 dm³
Input the parameters and solve;
Molarity = [tex]\frac{0.64}{0.6}[/tex] = 1.06M
What is the frequency of a wave traveling at 5,000 m/s with a wavelength of .002 m/cycle?
Answer:
[tex]2.5\cdot 10^6 Hz[/tex]
Explanation:
The relationship between the speed of a wave, its frequency and its wavelength is given by the wave equation:
[tex]v=f\lambda[/tex]
where
v is the wave speed
f is the frequency of the wave, which is the number of cycles completed by the wave in one oscillation
[tex]\lambda[/tex] is the wavelength, which is the distance between two consecutive crests of the wave
For the wave in this problem we have:
v = 5000 m/s is the speed
[tex]\lambda=0.002 m[/tex] is the wavelength of the wave
Solving for f, we find the frequency:
[tex]f=\frac{v}{\lambda}=\frac{5000}{0.002}=2.5\cdot 10^6 Hz[/tex]
2. An 18.0 liter container holds 1.20 moles of oxygen gas at 45.0 degrees Celsius. What is the
pressure in the container? *
Answer:
The pressure in the container is 1,7 atm.
Explanation:
We convert the unit of temperature in Celsius into Kelvin:
0°C= 273K --> 45°C= 45 + 273= 318 K
We use the formula:
PV=nRT ---> P =nRT/V
P= 1,20 mol x 0,082 l atm/K mol x 318 K/18,0 L
P= 1, 7384 atm
Find the number of moles of argon in 452 g of argon.
Answer: 13.31 moles.
Explanation: So take 452 grams of Argon and multiply by the molar mass of Argon. Your units will cancel out, leaving you with moles of Argon.
A candle is placed on one pan of a balance, and an equal weight is placed on the other
pan. What would happen if you lit up the candle and waited for a while?
Lighting the candle on a double-pan mechanical balance will cause the balance to tilt as the candle loses mass due to combustion, favoring the side with the unburned weights.
When a candle placed on one pan of a double-pan mechanical balance is lit, and an equal weight is on the other pan, the balance will be disrupted over time. As the candle burns, it loses mass primarily through the combustion process, which converts wax into gases like carbon dioxide and water vapor that are released into the air. As a result, the mass in the candle's pan decreases, causing the balance to tilt favoring the side with the unburned weights, typically metal cylinders of standard mass.
How many grams of CaF2 are present in 1.25 L of a 0.15 M solution of CaF2? How do I find the grams I am confused on that part?
Answer:
Mass = 14.64 g
Explanation:
Given data:
Volume of solution = 1.25 L
Molarity of Solution = 0.15 M
Mass of CaF₂ = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
We will calculate the number of moles of CaF₂ and then determine the mass by using number of moles.
0.15 M = number of moles of solute / 1.25 L
number of moles of solute = 0.15 M × 1.25 L
number of moles of solute = 0.1875 mol/L × L
number of moles of solute = 0.1875 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.1875 mol ×78.07 g/mol
Mass = 14.64 g
The Mass of CaF₂ is 14.64 g. Molarity is the ratio of number of moles over the volume of solution.
Given:
Volume of solution = 1.25 L
Molarity of Solution = 0.15 M
To find:
Mass of CaF₂ = ?
What is Molarity?Molarity is used to describe the concentration of solution. It is given by number of moles divided by volume of solution in litres.
Molarity = number of moles of solute / L of solution
We will calculate the number of moles of CaF₂ and then determine the mass by using number of moles.
0.15 M = Number of moles of solute / 1.25 L
Number of moles of solute = 0.15 M * 1.25 L
Number of moles of solute = 0.1875 mol/L * L
Number of moles of solute = 0.1875 mol
Calculation of mass:
Mass = number of moles / molar mass
Mass = 0.1875 mol *78.07 g/mol
Mass = 14.64 g
Thus, the mass of CaF₂ is 14.64 grams.
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Describe the steps used to create Lewis dot structures to represent covalent bonds.
How many atoms of hydrogen in the product side of the balanced equation?
Fe + H20 ---> FeO + H2
A. 2
B. 3
C. 6
Answer:
A
Explanation
The product side is on the right, FeO + H2. H represents hydrogen, the number after it is the sbscript, which indicates that there are two hydrogen atoms.
There are two atoms of hydrogen in the product side of the balanced chemical equation.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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a movable chamber has a volume of 18.5 L (at temperature of 18.5 C) assuming no gas escapes and the pressure remains constant what is the temperature when the chamber has a volume of 19.8 L
Answer:
[tex]39 ^\circ C[/tex]
Explanation:
Given,
V₁ = 18.5 L
T₁ = 18.5° C = 273 + 18.5 = 291.5 K
V₂ = 19.8 L
T₂ = ?
Pressure is constant
Using ideal gas equation
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
[tex]\dfrac{18.5}{291.5}=\dfrac{19.8}{T_2}[/tex]
[tex]T_2 = 312 K[/tex]
[tex]T_2 = 312 -273 =39 ^\circ C[/tex]
The temperature when the chamber has a volume of 19.8 L should be considered as the 39 degrees.
Calculation of the temperature:Since
V₁ = 18.5 L
T₁ = 18.5° C = 273 + 18.5 = 291.5 K
V₂ = 19.8 L
So here the final temperature should be
V1/T1 = V2/T2
18.5 L/291.5 = 19.8 / T2
So T2 = 312 k
= 312 - 273
= 39 degrees
hence, The temperature when the chamber has a volume of 19.8 L should be considered as the 39 degrees.
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Calculate the molarity of Na+ ions in a 100 ml solution containing 0.46 g Na3PO4
Answer:
0.084 M
Explanation:
molar mass of Na3PO4 = 3*23 + 31 + 4*16 = 164 g/mol
moles of Na3PO4 = mass / molar mass = 0.46/164 = 0.0028 mol
There are 3 moles of Na+ in 1 mol of Na3PO4, so there are 3*0.0028 = 0.0084 moles of Na+ in the solution
Molarity is defined as:
M = moles of solute/litre of solution
100 ml are equivalent to 0.1 L
Therefore:
M of Na+ = 0.0084/0.1 = 0.084 M
Periodic law states that when the elements are arranged according to their atomic numbers, this allows elements with similar properties to appear at regular intervals. Predict the group of elements and their number of valance electrons that will combine in a 3:2 ratio to with calcium
Answer:
is a mutiply choice answer just to be specific
Explanation:
Final answer:
Elements from the chalcogen group (group 16), which have six valence electrons, will combine with calcium in a 3:2 ratio to form a compound, such as calcium oxide ([tex]Ca_3O_2[/tex]).
Explanation:
The question asks which group of elements and how many valence electrons they have that would combine in a 3:2 ratio with calcium to form a compound. Calcium is an alkaline earth metal and has two valence electrons. It is located in group 2 of the periodic table. For elements to combine with calcium in a 3:2 ratio, we need to look for elements that will combine in such a way that three atoms of that element will bond with two atoms of calcium. This typically occurs with nonmetals from the chalcogen group (group 16), which have six valence electrons each.
For example, if we consider oxygen (O), which is a member of the chalcogen group, it can be seen that two calcium atoms (each providing two valence electrons for a total of four electrons) will combine with three oxygen atoms (each needing two electrons to complete its valence shell) to form calcium oxide ([tex]Ca_3O_2[/tex]) in a 3:2 ratio, utilizing all valence electrons involved in the bond formation.