How many grams of silver nitrate are needed to prepare 0.125 M solution in 250.0 mL of water?*
(1 Point)
AgNO₃
Ag
= 107.868 8
mol
N = 14.0078
mol
8
0 = 15.999
mol
0.313 g
169.872 g
0.0849 g
5.31 g
O 31.3 g
Answer:5.3 grams AgNO3
Explanation:
To solve your problem, take a look at the definition of molality (m):
moles of solute/kg of solvent
You are given the grams of solvent (water) to find the grams of silver nitrate.
First, convert 250 grams to kg:
250 g * 1 kg / 1000g = 0.250 kg
Now that you have the kg of solvent, you can solve for the moles of solute:
kg of solvent * molality = moles of solute
0.250 kg * 0.125 m = 0.03125 mol AgNO3
You can convert the number of moles to grams using the molar mass of AgNO3, which is 169.872 g/mol:
moles of solute * molar mass of solute = grams of solute
0.03125 mol AgNO3 * 169.872 g/mol = 5.3085 g
Because your question provides two significant digits, you must round this number to get the final answer:
5.3 grams AgNO3
I hope this helps!
How many lone pairs are jn Xel3+1
tell me how is your life as a youngster
Answer:
ruthless, my style as a juvenile
ran with a gang, slanged in the meanwhile
Explanation:
Classity the following of matter
under the
three basic particles
Oxygen, soduim, water, hydrogen, iron,
potassuim.
chlorine
magnesuimion
Answer:
Oxygen sodium hydrogen iron potassium chlorine are elements
Water is a compound
And magnesium ion is cation.
Morever oxygen hydrogen and chlorine are gases
Water and magnesium ion are liquid
And sodium iron potassium are solids
Explanation:
A cork has a mass of 3 grams and a volume of 16 cm3. Calculate the density.
Answer:
0.01875kg/m^3
Explanation:
mass=0.003kg
volume=0.16m
density=mass/volume
=0.003/0.16
=0.01875kg/m^3
list 5 island in the Philippines
Answer:
Coron, Palawan, El Nido, Palawan, Cebu, Boracay, Siargao.
Explanation:
I hope this helps.
coron,palawan,El nidu, Cebu and boracay are 5 island in Philippines.....
A continuously stirred tank reactor is designed to remove the hazardous waste compound trichloroethylene (TCE) from industrial wastewater. The tank is 3250 liters. The wastewater flows into the tank at 200 L/min with a TCE concentration of 25 mg/L. The reactor decays TCE at a reaction rate of 0.20 min-1 . What is the steady-state concentration of TCE in the treated water leaving the reactor
Answer:
the steady-state concentration of TCE in the treated water leaving the reactor is 5.88 mg/L
Explanation:
Given that;
Tank volume v = 3250 liters
wastewater flows into the tank Q = 200 L/min
TCE concentration Co= 25 mg/L
reactor decays TCE at a reaction rate K = 0.20 min-1
mass balance
we know that;
Accumulation = inflow - outflow ± generation
⇒dc/dt = QCo - Qc ± rc.V
now at a steady state; dc/dt = 0
so
0 = QCo - Qc + rcV
where rc = -kc
0 = QCo - Qc - kcV
Qc + kcV = QCo
c(Q + kV) = QCo
c = QCo / (Q + kV)
so we substitute
c = (200 × 25) / (200 + (0.2×3250))
c = 5000 / 850
c = 5.88 mg/L
Therefore, the steady-state concentration of TCE in the treated water leaving the reactor is 5.88 mg/L
How many O atoms are in 7.39 g CO2?
Answer:
2 O atoms
hope it helps....
Answer:
2O is the correct answer
A bullet seized from a crime scene has a composition of lead 11.6 g, tin 0.5 g, and
antimony 0.4 g. What is the percentage of lead in the bullet? Express your answers to
the ones place.
Answer:
92.8%
Explanation:
Step 1: Given data
Mass of lead in the bullet (mPb): 11.6 gMass of tin in the bullet (mSn): 0.5 gMass of antimony in the bullet (mSb): 0.4 gStep 2: Calculate the total mass of the bullet
The total mass of the bullet is equal to the sum of the masses of the elements that form it.
m = mPb + mSn + mSb = 11.6 g + 0.5 g + 0.4 g = 12.5 g
Step 3: Calculate the mass percentage of Pb in the bullet
We will use the following expression.
%Pb = mPb / m × 100%
%Pb = 11.6 g / 12.5 g × 100% = 92.8%
How many formula units of CuCl2 are present in 18.42 g?
Answer:
Think 12 units
Explanation:
Because it represents the hands of the clock
CH3CH3C(CH3)2CH2I classification and name
Answer:
1,2 di methyl 5 ene tri chloro hexane
What happens when a base dissolves?
A. It increases the concentration of OH in solution.
B. It increases the concentration of H+ in solution.
C. It adds oxygen to the solution.
D. It is no longer dangerous.
Answer:
A. It increase the concentration of OH in solutions.
Explanation:
Bases are substances that react with and neutralise acids, producing water. When dissolved, bases release hydroxide ions, OH-(aq) into solution.
When a base dissolves, it increases the concentration of OH⁻ ions in the solution. Therefore, option A is correct.
What are acids and bases?An acid can be described as a substance that is capable of donating a hydrogen ion to another substance. A base can be described as a molecule or ion that is able to have a hydrogen ion from an acid.
Acidic materials are commonly identified by sour taste. An acid can be considered commonly a molecule that can donate an H⁺ ion and can be energetically favorable after a loss of H⁺ ion. Acids increase the concentration of H⁺ ions in solution.
Bases are described by a bitter taste and a slippery nature. A base or alkali increases the concentration of OH⁻ ions in the solution. When bases react with acids, they give salts and water as products.
The pH range on the pH scale of the acids lies between 0 to 7 and the pH range of the bases lies between 7 to 14.
Learn more about acids and bases, here:
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Iron melts at 1535 °C. What would this temperature be in Fahrenheit
Answer:
2,795 F
Explanation:
Calcium and titanium atoms have the same mass
Answer:
these elements do not have the same masses.
Calculate the number of Li atoms in 7.8 mol of Li.
Express your answer using two significant figures.
4.7 × 10²⁴ atoms Li
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
7.8 mol Li
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 7.8 \ mol \ Li(\frac{6.022 \cdot 10^{23} \ atoms \ Li}{1 \ mol \ Li})[/tex]Multiply/Divide: [tex]\displaystyle 4.69716 \cdot 10^{24} \ atoms \ Li[/tex]Step 4: Check
We are told to round to 2 sig figs. Follow sig fig rules and round.
4.69716 × 10²⁴ atoms Li ≈ 4.7 × 10²⁴ atoms Li
You have a shirt. If you shine a red light on it, it looks red. If you shine a blue light on it, it looks
blue. If you shine a green light on it, it looks green. What color is the shirt?
Answer: White or Black
Explanation: White is a blank color used for coloring so if you shine a certain color on it it'll show and along goes with black. :)
What is the molarity of a solution made from 325.4g of Aluminum chloride with enough water te
make 500.0 mL?*
(1 Point)
AICIAl = 26.9828 C1 = 35.45
mol
8
mol
0.488M
O 4.88M
0 2.44M
0 2.440M
Answer:
awdaef
Explanation:
Why does adding lemon juice to a blueberry smoothie
make it change color from purple to pink.
Answer:
Acidity
Explanation:
Please help!!
I don’t understand
Answer:
[tex]= 3.105x10^{24}molecules\ acetone[/tex]
Explanation:
Hello!
In this case, given the volume of acetone, it is possible to compute the mass and next the moles via its molar mass (58.08 g/mol) as shown below:
[tex]n_{acetone}=380mL*\frac{0.788g}{1mL} *\frac{1mol}{58.08 g} \\\\n_{acetone}=5.16mol[/tex]
Then, via the Avogadro's number it is possible to compute the acetone molecules as follows:
[tex]=5.16mol*\frac{6.022x10^{23}molecules}{1mol}\\\\= 3.105x10^{24}molecules\ acetone[/tex]
Best regards!
Richard sketched models of two different neutral isotopes of oxygen. If the
isotope models are accurate, which statement might be true? (Refer to the
periodic table if necessary.)
A. One shows 7 protons, and one shows 9.
B. One shows 8 neutrons, and one shows 9.
C. One shows 8 electrons, and one shows 9.
D. One shows 8 protons, and one shows 7.
Answer:
its b
Explanation:
just did the test on A P E X
If the isotope models are accurate, One shows 8 neutrons, and one shows 9. Therefore, the correct option is option B.
What is isotope?A chemical element's isotope is one of more than one species of atoms that share the same atomic number, spot on the periodic table, and almost identical chemical activity, but differ in atomic mass and physical characteristics. There are a number of isotopes for each chemical element.
The first step in identifying and labelling an atom is to count the protons within its nucleus. Usually, this nuclear number is denoted by the letter Z. The fact that all atoms possessing the same number of electrons have essentially equal chemical characteristics lends the atomic number its enormous significance. If the isotope models are accurate, One shows 8 neutrons, and one shows 9.
Therefore, the correct option is option B. If the isotope models are accurate, One shows 8 neutrons, and one shows 9.
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PLZ HELP ITS DUE IN 20 MINUTES, I WILL GIVE BRAINLIST TO RIGHT ANSWER
How many significant figures are in the following measurement? 433.8 liters
Just like cans of soup, atoms of the same element often have different masses. These different varieties are called isotopes. In the Average Atomic Mass Gizmo, you will learn how to find the average mass of an element using an instrument called a mass s
Answer:
ions are deflected and the lighter the ions the more the deflection.
Placing magnetic field in the path of the ions cause them to move in a curved path.
Explanation:
This question is all about the way in which mass spectroscopy works. Mass spectroscopy Is one of the techniques in spectroscopy which is used in the identification of chemical compounds.
Mass spectroscopy works based on the principle of ionization. For a mass spectroscopy to start ionization must first occur that is to say this is the first step in the identification of compound in mass spectroscopy.
The following steps are involve in mass spectroscopy;
=> Ionization: the molecules of the sample are first ionized. The ions formed here are positive ions.
=> Acceleration: the ions in step one are accelerated.
=> Deflection: the smaller ions get deflected more than the bigger ions. The magnetic field is used in the deflection of this ions.
=> Detection: the ions are then detected.
Therefore, to answer the question, the ions are deflected and the lighter the ions the more the deflection.
Placing magnetic field in the path of the ions cause them to move in a curved path.
1. How would you describe what red cabbage juice is?*
(1 Point)
Acid
Neutral
Alkali
Indicator
Salt
A mass of 2000 kg is raised through a height of 20 metres in 20 seconds.
What is work done and power developed.
Answer:
Work: 392400 J Power developer: 19620
What group of elements on the periodic table is not usually found in nature?
Answer:
Halogens
Explanation:
they they are never found free in nature.
3. You can express the density of an object in units of kg/L or in units of
g/mL. How is the density of an object in kg/L related to its density in g/mL?
How many sig figs does the number "7.500 x 10^8" have?
Answer:
4 digits that are 7,5,0,0
Explanation:
3. A boy with a mass of 30 kg is ice skating at a speed of 2m/s. What type of energy is he using and what are the joules?
Answer:
60 joules. ....................
What IONS are present in MgCO₃ (magnesium carbonate)? Mark
all that apply.
A Mg+
B C⁴-
C O2-
D Mg²+
E C⁴+
F CO₃²-
Answer:
Answer:
Explanation:
"Magnesium is an alkaline earth metal, and forms a Mg2+ ion. And carbonate ion, CO2−3 , has an equal an opposite charge. And thus the ionic species is MgCO3"
Ionic substances are composed of two or more ions. The compound MgCO3 is composed of Mg²+ and CO₃²- ions.
What are ions?The term ions refer to charged species that are present in a system. The compound MgCO₃ is an ionic substance and ionic substances are composed of ions.
As such, the compound MgCO₃ is composed of the ions Mg²+ and CO₃²-.
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