Answer:
8.2
Explanation:
To solve this problem;
The concentration of [H⁺] = 6.8 x 10⁻⁹mol/L
So, we need to convert this to pH:
pH = -log [H⁺]
So;
pH = -log 6.8 x 10⁻⁹ = 8.2
Metals bond with halogens to form colorless metal halides. During an experiment, chlorine water was added to a solution of potassium bromide. A record of the experiment is shown.
Experimental Record
Reactants Color of Reactants Color of Reactants after Mixing
cl,
Colorless solution
Deep yellow-orange colored solution is formed
KBT Colorless solution
Which of the following conclusions can be made about this chemical reaction based on the data? (1 point)
O Chlorine is more reactive than bromine.
Potassium bromide and chlorine do not react.
O Potassium metal is formed from a single replacement reaction.
O Bromine solution is colorless and is formed due to a single replacement reaction.
Answer:
O Chlorine is more reactive than bromine.
Explanation:
From this experiment we can conclude that chlorine is more reactive than bromine and it is the reason why the reaction is able to proceed.
The reaction is a single displacement reaction in which the position of an element in the activity series is very important. Since chlorine is more electronegative and highly reactive when compared to bromine, it will displace bromine from the solution of potassium bromide. So, we have product of potassium chloride and the bromide.
A 15.33 g sample of magnesium oxide is found to contain 12.67 g of magnesium. What is the percent (by mass) composition of
the magnesium in the compound?
026 Ma
Answer:
Explanation:
I can help
Answer:
12.67g of Mg / 15.33g of MgO * 100% = 82.6% of Mg
Explanation:
What happens to a cell when it's in different environments?
how does a diaphragm help in viewing the specimen in a microscope
Answer:
Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.
The expression 1223 ÷ r can be used to find how many batches Tyra can make with the sugar she has. If r is 23 cup, how many batches of cookies can Tyra make?
Answer:
Tyra can make 53 batches
Explanation:
Given
[tex]Batches = \frac{1223}{r}[/tex]
Required
Find the number of batches when r = 23
To do this, we simply substitute 23 for r in [tex]Batches = \frac{1223}{r}[/tex]
So, we have:
[tex]Batches = \frac{1223}{23}[/tex]
[tex]Batches = 53.17[/tex]
Approximate:
[tex]Batches = 53[/tex]
Which two factors are used to calculate the kinetic energy of an object?
Answer:
Mass and Velocity
Explanation:
hope this is the right answer might wrong tho
Answer:
its velocity and mass
Explanation:
I got it right on edg
Bertie instructs his butler, Jeeves, to make him 40g of calcium oxide (CaO). How much CaCO3 does Jeeves need to find?
Answer:
The amount of CaCO₃ Jeeves needs to find is approximately 71.392 grams
Explanation:
The given parameters are;
The mass of the CaO required = 40 g
The chemical reaction for the production of CaO from CaCO₃ is given as follows;
CaCO₃(s) → CaO(s) + CO₂(g)
Therefore, 1 mole of CaCO₃ produces 1 mole of CaO and 1 mole of CO₂,
The molar mass of CaO = 56.0774 g/mol
Number of moles, n = Mass/(Molar mass)
The number of moles of CaO = 40 g/(56.0774 g/mol) ≈ 0.7133 moles of CaO
Therefore, given that 1 mole of CaO is produced from 1 mole of CaCO₃ 0.7133 moles of CaO will be produced from 0.7133 moles of CaCO₃
The molar mass of CaCO₃ = 100.0869 g/mol
Mass = The number of moles × The molar mass
∴ The mass of CaCO₃ Jeeves needs to find = 0.7133 moles × 100.0869 g/mol ≈ 71.392 g
The mass of CaCO₃ Jeeves needs to find ≈ 71.392 grams.
13. What is the charge of an aluminum ion that has 13 protons and 10 electrons?
Answer:
+ 3
Ex planation:
Al3+ indicates an ion of aluminum having a charge of + 3. I.e., since an aluminum atom normally has 13 protons and 13 electrons, this ion has 10 electrons (-10 charge) and 13 protons (+ 13 charge) giving it a charge of + 3 (-10 + 13 = +3).
hope this helps!
What kind of cell has a nonspontaneous voltage?
An electrolytic cell
A dry cell
A wet cell
A voltaic cell
Answer:
dry cell
Explanation:
because it stops when salt distribution becomes equal as bridge is not added
Answer:
a
Explanation:
a p e x :)
how many moles are represented by 3.01x10^23 helium atoms
a. 1 mole
b. 0.50 moles
c. 0.75 moles
d. 5 moles
Answer:
b. 0.50 moles
Explanation:
To solve this problem we use Avogadro's number (6.023x10²³ atoms/mol).
By dividing the number of atoms (or molecules) by that number, we can calculate how many moles they represent.
3.01x10²³ atoms ÷ 6.023x10²³ atoms/mol = 0.50 molesSo the answer is option b. 0.50 moles.
PLS HELP THIS IS DUE TODAY!!
Answer:
I think it would be Yellow
Which element is most similar to fluorine in the way it reacts with other elements?
Answer:
The answer is chlorine
Explanation:
What can you determine about an element if you only know its group number on the periodic table?
A. The total number of protons and neutrons
B. The number of protons
C. The total number of electrons
D. The number of valance elctrons
Answer:
c
Explanation:
Much of the thermal energy within the Earth comes from atoms that decay. What is another major source of thermal energy within the
Earth?
A. gravitational energy left over from the formation of the Earth
B. thermal energy from the decay of dead plants and animals
c. thermal energy trapped by clouds and water vapor in the atmosphere
D. thermal energy absorbed by the Sun at the Earth's crust
Geothermal energy is heat produced by the Earth itself. It is a resource that may be gathered for human use and is renewable.
The correct option is (D) Thermal energy absorbed by the Sun at the Earth's crust
The friction and gravitational attraction that were produced when Earth was formed more than 4 billion years ago provide a modest amount of the core's heat. The continual production of heat on Earth, however, is mostly caused by the decay of radioactive isotopes like potassium-40 and thorium-232. From the surface to the core, the temperature of Earth increases with depth. The geothermal gradient is the term used to describe this progressive temperature variation. Rock that has partially melted is known as magma, which is gas- and bubble-filled. The lower crust and mantle both contain magma, which occasionally bubbles to the surface as lava.Nearby rocks and subsurface aquifers are heated by magma. Geysers, hot springs, steam vents, undersea hydrothermal vents, and mud pots are among ways that hot water can be emitted.They are all powered by geothermal energy. Their heat may be captured and used directly for heating, or their steam can be used to generate electricity.Learn more about the Geothermal energy with the help of the given link:
https://brainly.com/question/1061324
#SPJ1
number of atoms in 10090 g Ne (PLEASE HELP!!)
Answer:
3012.51×10²³ atoms of Ne
Explanation:
Given data:
Mass of Ne = 10090 g
Number of atoms = ?
Solution;
Formula:
Number of moles = mass/ molar mass
Molar mass of Ne = 20.17 g/mol
Number of moles = 10090 g/ 20.17 g/mol
Number of moles = 500.25 mol
Number of atoms:
1 mole contain 6.022×10²³ atoms
500.25 mol × 6.022×10²³ atoms / 1 mol
3012.51×10²³ atoms
A container with a volume of 893L contains how may moles of air at STP?
Answer:
i think 54
Explanation:
In the container with a volume of 893 liters, there are 39.9 moles of air at STP conditions.
We can find the number of moles with the Ideal gas law equation:
[tex] PV = nRT [/tex]
Where:
P: is the pressure = 1 atm (STP)
V: is the volume = 893 L
n: is the number of moles =?
R: is the gas constant = 0.082 L*atm/(K*mol)
T: is the temperature = 273 K
Hence, the number of moles is:
[tex] n = \frac{PV}{RT} = \frac{1 atm*893 L}{0.082 L*atm/(K*mol)*273 K} = 39.9 moles [/tex]
Therefore, there are 39.9 moles in the container.
You can find more about Ideal gas law here: https://brainly.com/question/4147359?referrer=searchResults
I hope it helps you!
How would you find the average speed of a marathon runner throughout an entire race? A Divide the total distance the runner travelled by the total time they took to travel that distance B Divide the total time the runner it took the runner to travel that distance by the the total distance they travelled C Multiply the total distance the runner travelled by the total time they took to travel that distance D Multiply the total time the runner it took the runner to travel that distance by the the total distnace they travelled
Answer:
distance divided by time so A
Explanation:
how many atoms are in 2.45 moles of hydrogen
Answer:
There are 1.4754246675000002e+24 atoms of Hydrogen within the measurement of 2.45 moles of hydrogen!
Explanation:
2. How many atoms are in 5.6 moles of Na? Answer:___3.2 E 24 atoms of Na
Answer:
5.6[tex]\frac{6.02*10^{23} }{1}[/tex] = 3.4 X [tex]10^{24}[/tex]
Explanation:
the correct answer to it is 3.4 instead of 3.2. I got 3.4 from rounding it from 3.37.
The number of atoms in 5.6 moles of Na have been [tex]\rm \bold{3.37\;\times\;10^2^4}[/tex] atoms.
Atoms have been defined as the smallest unit of matter. The number of atoms in a mole of compound has been given by Avogadro law.
According to the Avogadro law, the number of atoms in mole of sample has been equal to the Avogadro number. The values of Avogadro number has been [tex]6.023\;\times\;10^2^3[/tex].
Computation for the atoms in NaThe available moles of Na have been 5.6 moles.
The number of atoms has been given by:
[tex]\rm 1\;mol=6.023\;\times\;10^2^3\;atoms\\ 5.6\;mol=5.6\;\times\;6.023\;\times\;10^2^3\;atoms\\ 5.6\;mol=3.37\;\times\;10^2^4\;atoms[/tex]
The number of atoms in 5.6 moles of Na have been [tex]\rm \bold{3.37\;\times\;10^2^4}[/tex] atoms.
Learn more about number of atoms, here:
https://brainly.com/question/2099804
A 10.0 g sample of a hydrate was heated until all the water was driven off. The mass of the anhydrous product remaining was 8.00 grams. What is the percent of water in the hydrate?
Answer:
20%
Explanation:
10.0 = 100%
8.00 = 80%
100-80= 20
How many particles are in 3.2 mole of neon gas
There are 1.93 x 10²⁴ particles
Further explanationGiven
3.2 moles of Neon gas
Required
Number of particles
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
So the number of particles for 3.2 moles :
N = 3.2 x 6.02.10²³
N = 1.93 x 10²⁴
or
we can describe it using Avogadro's number conversion factor
[tex]\tt 3.2~moles\times \dfrac{6.02\times 10^{23}}{1~mole}=1.93\times 10^{24}[/tex]
HELPPPPPPPPPP
IDENTIFY THE ELEMENT WHICH HAS A GREATER ATOMIC MASS FLOURINE OR CLOURINE
Answer:
Cu Copper 63.546
Cl Chlorine 35.453
F Fluorine 18.998403
Explanation:
I don't know whether you asked for Cu or Cl so answered it both.
Choose the statement below that correctly describes electrons.
a. Electrons have a positive charge and are lighter than protons
b. Electrons have a positive charge and are heavier than protons
c. Electrons have a negative charge and are heavier than protons
d. Electrons have a negative charge and are lighter than protons
Answer:
d. Electrons have a negative charge and are lighter than protons
Explanation:
The best statement that describes electrons is that electrons are negatively charged and are lighter than protons.
There are three known subatomic particles which are:
Protons which are the positively charged particles within an atom. Electrons are the negatively charged particles Neutrons do not carry any charges.The mass of the protons and neutrons are similar.
Electrons are lighter than both protons and neutrons.
All atoms of oxygen have the same mass number. True or False
Answer:
pretty sure it's false
Explanation:
hope this helps!
The chemical equation below shows the photosynthesis reaction.
6CO2 + 6H2O → C6H12O6 + 6O2
A reaction uses 528 g of CO2. How many grams of water are used in this reaction?
Answer:
12
Explanation:
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})[/tex]Multiply/Divide: [tex]\displaystyle 1.99934 \ moles \ gas[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
The abnormally high boiling point of HF as compared to HCl is primarily due to intermolecular forces of attraction called
A) network bonds
B) electrovalent forces
C) hydrogen bonds
D) van der Waals forces
Answer:
C) hydrogen bonds
Explanation:
The abnormally high boiling point of HF compared to HCl is primarily due to the intermolecular forces called hydrogen bonds.
Hydrogen bonds are intermolecular forces of attraction between polar molecules in which a hydrogen atom is directly joined to a highly electronegative atom (oxygen, nitrogen or fluorine).
Hydrogen bonds are very strong force of attraction compared to dipole - dipole attraction that holds the HCl together.
I need help working these
Answer:
1) 7.80 X 10^22[tex]\frac{1}{6.02*10^{23} }[/tex] = .13
2) 5.6 [tex]\frac{6.02*10^{23} }{1}[/tex] = 3.4 X 10^24
3)3.81 [tex]\frac{1}{74.55}[/tex] X [tex]\frac{6.02*10^{23} }{1}[/tex] = 3.08 X 10^22
4) 399.91 [tex]\frac{4.05*10^{23} }{6.02*10^{23} }[/tex] = 269
5)4.32 [tex]\frac{1}{18.01}[/tex] X [tex]\frac{22.4}{1}[/tex] = 5.37
Explanation:
For 2 the correct answer is 3.4 instead of 3.2. The 3.4 is rounded from 3.37. Sadly I couldn't figure out the bonus.
What is the percent composition of nitrogen in N 2 O
Answer:
28 %
Explanation:
Mass mass N2O = 28 + 16 = 44 mass nitrogen = 2 x 14 = 28 % nitrogen Chemistry.
Number 2 & 3 please !!<3
Answer:just for the ponits
Explanation:ima be a jenna