Answer:
(Click here to get an answer to your question ✍️ 0.385g of 17Cl is how many atoms?).
Explanation:
GIVING BRAINLIST TO BEST ANSWER! How does Bohr’s model of the atom compare with Thomson’s model?
A) They both describe atoms as small, indivisible spheres.
B) They both describe electrons as moving around the nucleus.
D) They both describe electrons as being surrounded by the positive matter.
C) They both describe atoms as being made up of positive and negative matter.
Answer:I say C .. u should give the other person Brainliest bc they had a fully answer!
Explanation:
Answer:
d on brainly
Explanation:
i just took the exam
Please ASAP:
According to their energies, atomic orbitals are filled as:
Answer:
C
Explanation:S has less energy than P, and P has less energy than D and so on.
What does the speed of a sound depend on?
A.
the medium through which it travels
B.
the source from which it is emit
C.
the volume of the sound
D.
the pitch of the sound
Osmium metal, the densest element, has a density of 22.6 g/mL, while hydrogen, the least dense element, has a density of 8.99 e-5 g/mL. Calculate the volume occupied by 1.00 g of each element. How many times more dense is osmium than hydrogen?
Answer:
1. Volume of osmium = 0.044 mL
2. Volume of Hydrogen = 11123.47 mL
3. Osmium is 251390 times denser than hydrogen
Explanation:
From the question given above, the following data were obtained:
Density of osmium = 22.6 g/mL
Density of Hydrogen = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Mass of Hydrogen = 1 g
1. Determination of the Volume of osmium.
Density of osmium = 22.6 g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
22.6 = 1 / volume
Cross multiply
22.6 × volume = 1
Divide both side by 22.6
Volume = 1 / 22.6
Volume of osmium = 0.044 mL
2. Determination of the Volume of Hydrogen.
Density of osmium = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
8.99×10¯⁵ = 1 / volume
Cross multiply
8.99×10¯⁵ × volume = 1
Divide both side by 8.99×10¯⁵
Volume = 1 / 8.99×10¯⁵
Volume of Hydrogen = 11123.47 mL
3. Determination of the number of times osmium is denser than hydrogen.
Density of osmium (Dₒ) = 22.6 g/mL
Density of Hydrogen (Dₕ) = 8.99×10¯⁵ g/mL
Dₒ / Dₕ = 22.6 / 8.99×10¯⁵
Dₒ / Dₕ = 251390
Cross multiply
Dₒ = 251390 × Dₕ
Thus, osmium is 251390 times denser than hydrogen.
PLS HELP!!!!! WILL GIVE BRAINLIEST, 5 STARS, AND THANKS!!!!!!!!!!
Which reactions are the reverse of one another?
condensation and addition
addition and elimination
elimination and condensation
substitution and addition
Answer:
it has to be b
Explanation:
the other ones don't make any sense
The sucrose molecule is a large and complex molecule built of carbon, hydrogen, and oxygen. How many sucrose
molecules are in 0.5 moles of sucrose?
Answer:
There are 3.01x10²³ molecules of sucrose
Explanation:
In order to calculate the number of molecules of any atom or compound, we need to use the Avogadro number which is 6.02x10²³. This number could represent atoms or molecules of any mole of compound or atom.
In other words, 1 mole of a certain atom or compound has 6.02x10²³ molecules or atoms.
we have 0.5 moles of sucrose, all we just need to do is a simple rule of 3:
If 1 mole contains 6.02x10²³ molecules
then 0.5 moles will contain:
n° molecules = 0.5 * 6.02x10²³ / 1
n° molecules = 3.01x10²³ molecules of sucroseHope this helps
What is the empirical formula for C10h22
Which of the following reactions is irreversible?
A. Zinc (Zn) reacting with hydrochloric acid (HCl)
B. Haber Process
C. Dehydrating copper sulfate (CuSO4)
D. Thermal decomposition of NH4Cl
PLEASE HELP
Answer:
A. Zinc (Zn) reacting with hydrochloric acid (HCl)
Explanation:
The reaction of Zinc with hydrochloric acid is an irreversible chemical process.
What makes a reaction reversible;
it must be involved in reversible chemical processes, no matter how small the extent of the reversibility. the rate of forward reaction must be equal to the backward one.So, hydrochloric acid when reacting with Zinc will give a complete chemical change that will go into completion.
Answer:
(A): Zinc (Zn) reacting with hydrochloric acid (HCI)
Explanation:
I got it right on founders edtell
Energy stored in an object because of position or condition is called ___________ energy.
Answer:
Potential energy
DENSITY CHEMISTRY WORD PROB I WILL MARK BRAINLIEST PLEASE HELP I NEED ASAP
Answer:
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel is 39 passengers
Explanation:
The given parameters of the cylinder representing the fuselage are;
The length of the cylinder, l = 30.0 meters
The width of the cylinder, w = 2.5 meters
The thickness of the cylinder, t = 2.5 mm = 0.0025 meters
The volume of the metal required to make the fuselage cylinder, V = (π·w²/4 - π·(w - 2·t)²/4) × l
Therefore, by substituting the known values, we have;
V = (π × 2.5²/4 - π×(2.5 - 2×0.0025)²/4) × 30 = 0.58845957392
The volume of the metal required to make the fuselage cylinder, V≈ 0.58846m³
The given density of steel = 7.87 g/cm³ = 7870 kg/m³
The given density of aluminum = 2.70 g/cm³ = 2,700 kg/m³
Mass = Density × Volume
The mass of the fuselage made with steel = The given density of steel × The volume of the metal required to make the fuselage cylinder
∴ The mass of the fuselage made with steel = 7870 × 0.58846 ≈ 4631.18
The mass of the fuselage made with steel ≈ 4631.18 kg
Similarly, the mass of the fuselage made with aluminum = 2,700 × 0.58846 ≈ 1588.84
The mass of the fuselage made with aluminum ≈ 1588.84 kg
The total mass the Embraer E170 could carry = The mass of the fuselage made with aluminum + The mass of the 78 passengers
The average mass of each passenger = 79 kg
∴ The total mass the Embraer E170 could carry ≈ 1588.84 + 78 × 79 = 7750.84
The total mass the Embraer E170 could carry ≈ 7750.84 kg
The extra mass the Embraer E170 could carry when made of steel = (The total mass the Embraer E170 can carry) - (The mass of the fuselage made with steel)
∴ The extra mass the Embraer E170 could carry when made of steel = 7750.84 - 4631.18 = 3119.36
The extra mass the Embraer E170 could carry when made of steel ≈ 3119.36 kg
The number of passengers the Embraer E170 could carry when made of steel = (The extra mass the Embraer E170 could carry when made of steel)/(The average mass of one passenger)
∴ The number of passengers the Embraer E170 could carry if its fuselage was made of steel = 3119.36 kg/(79 kg/passenger) ≈ 39.489 passengers
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel ≈ 39 passengers (we round down when counting people which are whole quantities)
What is the percent of N in
Li3N?
(Li = 6.94 amu, N = 14.01 amu)
Answer:
The percent of n would be 7.10
Explanation:
Which of the following empirical formulas is written correctly? *
Please help, How would you define what a chemical reaction and an equation is? Give an example.How would you know if a chemical reaction is balanced? Give an example.
Answer:
A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.
Explanation:
In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia.
guys please finnish thiissss
Answer:
1. H2O
2. Ba(OH)2
3. H2O
4. H2O
5. Ca(OH)2
6. H2O
Explanation:
Answer:
1. H2O
2. Ba(OH)2
3. H2O
4. H2O
5. Ca(OH)2
6. H2O
Explanation:
Hope this helps
A sample of oxygen gas has a volume of 150 mL when its pressure is 0.587 atm at 155 K. If the pressure and temperature are increased to STP, what will the new gas volume be?
Answer:
V₂ = 155.17 mL
Explanation:
Given data:
Initial volume = 150 mL
Initial pressure = 0.587 atm
Initial temperature = 155 K
Final temperature = 273.15 K
Final volume = ?
Final pressure = 1 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 0.587 atm × 150 mL × 273.15 K / 155 K × 1 atm
V₂ = 24050.86 atm .mL. K / 155 K.atm
V₂ = 155.17 mL
Seawater is an example of a _______ solution
a Liquid in gas
b Gas in liquid
C Solid in liquid
d Liquid in liquid
Answer:
C. Solid in liquid
Explanation:
Seawater is an example of a solid in liquid solution.
Sea water is made up of:
water mineral salts dissolved gasesA liquid solution is always made up of a solute being dispersed within the solvent medium.
The solvent is the liquid or fluid medium.
Such solutions are homogeneous because the solute particles are distributed evenly or uniformly in the solvent.
The solute is usually present in smaller amount compared to the solvent.
which of the following is true of climate but not of weather
A. Independent of regional temperatures.
B. Not useful for making future predictions
C. Determined by precipitation patterns collected over many years
D. Calculated from a variety of data, including wind speed and direction and cloud cover
Answer:
C. Determined by precipitation patterns collected over many yearsHelp me with this pls
I don’t know this and I need help help me
A. Neutrons and electrons
B. Protons and electrons
C. Electrons in energy levels
D. Protons and neutrons
Answer:
D.
Explanation:
Because protons and neutrons make up the mass of an atom.
During the naval battles of the South Pacific in World War II, the U.S. Navy produced smoke screens by spraying titanium tetrachloride into the moist air where it reacted according to the equation:
TiCl4 + H2O TiO2 + HCl
a. How many moles of H2O are needed to react with 6.50 moles of TiCl4? (13.0)
b. How many moles of HCl are formed when 8.44 moles of TiCl4 react? (33.8)
Explanation:
The reaction given is;
TiCl4 + H2O --> TiO2 + HCl
The reaction is not balanced, upon balancing it is given as;
TiCl4 + 2H2O → TiO2 + 4HCl
a. How many moles of H2O are needed to react with 6.50 moles of TiCl4?
From the reaction;
1 mol of TiCl4 requires 2 mol of H2O
6.50 mol of TiCl4 would require x mol of H2O
1 = 2
6.5 = x
x = 6.5 * 2 / 1 = 13.0 mol
b. How many moles of HCl are formed when 8.44 moles of TiCl4 react?
From the equation of the reaction;
1 mol of TiCl4 reacts to form 4 mol of HCl
8.44 mol of TiCl4 reacts to form x mol of HCl
1 = 4
8.44 = x
x = 8.44 * 4 / 1 = 33.76 mol
how molecules react to an increase in temperature.
Answer:
An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).
Explanation:
How many moles in 13 grams of C 2 H6 ? show work
Answer:
0.43mole
Explanation:
Given parameters:
Mass of C₂H₆ = 13g
Unknown:
Number of moles = ?
Solution:
To solve this problem we need to first find the molar mass of the given compound.
Molar mass of C₂H₆ = 2(12) + 6(1) = 30g/mol
So;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles = [tex]\frac{13}{30}[/tex] = 0.43mole
Which statement best describes the relationship between photosynthesis and cellular respiration?
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Photosynthesis is part of the carbon cycle, and cellular respiration is not.
Only plants perform photosynthesis, and only animals perform cellular respiration.
Photosynthesis releases carbon into the atmosphere, and cellular respiration removes carbon from the atmosphere.
Answer:
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Explanation:
The first option clearly expresses the relationship between photosynthesis and cellular respiration.
Cellular respiration releases carbon back into the atmosphere whereas photosynthesis removes the carbon from the atmosphere.
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water.
In cellular respiration, the product of the photosynthesis is used by organisms to produce energy.
A solution of baking soda has a pH of 9. Baking soda
(blank)
Answer: is a base
Explanation:
What are the three eras in the geologic time scale? *
*
How do you identify forces in a diagram
sun
arrow
moon
O
Mars
HELP PLEASE!!!!!!
“Andy was drawing
of his circuit. When
asked to explain it,
he said, “This is an
example of a
perpendicular
circuit. The light on
the left will be
brighter because
there is less wire."
Is he correct?”
PLEASE HELP 5TH GRADE SCIENCE Select the statement that correctly compares the sun and a comet.
O A. The sun and a comet orbit around the planets in space.
O B. The sun and a comet are bright and made up entirely of gas.
O C. The sun is at the center of the solar system, and the comet orbits around it.
O D. The sun is very small in size compared to a comet.
Answer:
c
Explanation:
The sun is at the center of the solar system, and the comet orbits around it.
The sun is at the center of the solar system, and the comet orbits around it. Therefore, option C is correct. Comets are orbiting around sun through the elliptical orbit.
What are comets ?Comets are tiny spatial objects that are composed of ice, dust and gases. Comets go around the sun in a highly elliptical orbit. They can spend hundreds and thousands of years out in the depths of the solar system before they return to sun at their perihelion.
Like all orbiting bodies, comets follow Kepler's Laws - the closer they are to the Sun, the faster they move. While a comet is at a great distance from the Sun, its exists as a dirty snowball several kilometers across.
But as it comes closer to the sun, the warming of its surface causes its materials to melt and vaporize producing the comet's characteristic tail. Comet tails can be as long as the distance between the Earth and the Sun. Hence, option C is correct.
Find more on comets:
https://brainly.com/question/30032291
#SPJ6
What are the answers??
The percent composition :
Al : 15.79%
S : 28.07%
O : 56.14%
Further explanationGiven
Aluminum, Oxygen, and Sulfur in Al₂(SO₄)₃ compound
Required
The percent composition
Solution
Molar mass of Al : 27 g/mol
Molar mass of O : 16 g/mol
Molar mass of S : 32 g/mol
Molar mass of Al₂(SO₄)₃ : 342 g/mol
% Al = 2.MM Al / MM Al₂(SO₄)₃ x 100%=2.27/342 x 100%=15.79%
% S = 3. MM S / MM Al₂(SO₄)₃ x 100%= 3.32/342 x 100%=28.07%
% O = 12.MM O / MM Al₂(SO₄)₃ x 100%= 12.16/342 x 100%=56.14%