Answer:
A.
Explanation:
Its [Ar] 3d¹⁰4s²
What process formed the water droplets in Scott's model? O evaporation O transpiration o condensation O precipitation
Answer: My guess would be condensation.
Explanation: Condensation makes water into water droplets.
need help, no idea what to do
The volume of unreacted Oxygen = 1.25 L = 1.25 dm³ = 1250 cm³
Further explanationGiven
Combustion of propane
3.6 L CO2
7.25 L O2
Required
The volume of unreacted oxygen
Solution
Reaction
C₃H₈ + 5O₂ ⇒ 3CO₂ + 4H₂O
Avogadro's :
In the same T,P and V, the gas contains the same number of molecules
So the ratio of gas volume will be equal to the ratio of gas moles
Vol O₂ = 5/3 x vol CO2 = 5/3 x 3.6 = 6 L
The unreacted : 7.25 - 6 = 1.25 L
You are given 100 g of a compound. The compound is composed of 37% hydrogen and 63% oxygen. How many grams of hydrogen are present in the 100 g sample?
Select one:
a. 37 g
b. 27 g
c. 100 g
d. 63 g
There are 37 grams of hydrogen present in the 100 g sample given that compound is composed of 37% hydrogen and 63% oxygen.
MASS OF AN ELEMENT:
According to this question, a compound is said to be composed of 37% hydrogen and 63% oxygen.
This means that in 100g of the compound, its elemental constituents are as follows:
H = 37/100 × 100O = 63/100 × 100This means that hydrogen will contain 37g in 100g of the given compound.
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Calculate the concentration 3.8g of copper sulfate, CuSO4 dissolved in 250cm4 of water
Answer:
Molarity = 0.08 M
Explanation:
Given data:
Mass of copper sulfate = 3.8 g
Volume of water = 250 cm³ (250/1000 = 0.25 L)
Concentration of solution = ?
Solution:
Number of moles of copper sulfate:
Number of moles = mass/molar mass
Number of moles = 3.8 g/ 159.6 g/mol
Number of moles = 0.02 mol
Concentration:
Molarity = Number of moles / volume in L
By putting values,
Molarity = 0.02 mol / 0.25 L
Molarity = 0.08 mol/L
Molarity = 0.08 M
What would be the anode
a magnesium and zinc galvanic cell?
The magnesium is the anode of a magnesium and zinc galvanic cell.
Anode of the magnesium and zinc galvanic cellThe magnesium is the anode means the site of oxidation, where magnesium ions flow into solution. Here the electrons leave the electrode and flow through the voltmeter as they move to the zinc cathode.
While on the other hand, zinc is the cathode i.e. the site of reduction, where zinc ions flow onto the electrode in order to pick up electrons so we can conclude that magnesium is the anode of a magnesium and zinc galvanic cell.
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Answer:ANSWER IS MG(s)
Explanation:
Anybody wanna help me with number 22? (Chemistry)
Answer:
Rutherford atomic model of atom
Explanation:
lord lutherford
Drag the tiles to the correct boxes to complete the pairs.
Chromium is a transition metal, and oxygen has an oxidation number of -2. Use this information to match each compound to its chemical formula.
chromium(VI) oxide
chromium(IV) oxide
chromium(III) oxide
chromium(II) oxide
Each compound and its chemical formula will be as follows:
chromium(VI) oxide - [tex]CrO_3[/tex].
chromium(IV) oxide - [tex]CrO_2[/tex].
chromium(III) oxide - [tex]Cr_2O_3[/tex].
chromium(II) oxide - [tex]CrO[/tex].
Formula of compoundsChromium being a transition metal means that it can assume variable oxidation states in different compounds. Oxygen has a valence of 2.
Thus, when deriving the formula of a compound formed by chromium and oxygen, each atom will take the mole that is equivalent to the oxidation number of the other.
For chromium(VI) oxide, chromium is taking 6 as the oxidation number. Thus the formula of the compound will be [tex]Cr_2O_6[/tex] or [tex]CrO_3[/tex].
For chromium(IV) oxide, chromium takes 4 as the oxidation number. Thus the formula is either [tex]Cr_2O_4[/tex] or [tex]CrO_2[/tex].
For chromium(III) oxide, chromium takes 3. The formula becomes [tex]Cr_2O_3[/tex].
For chromium(II) oxide, chromium takes 2. The formula is either [tex]Cr_2O_2[/tex] or [tex]CrO[/tex].
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15 points !! What is the underlying cause of atmospheric movement near Earth's surface?
O solar radiation
O rotation of Earth
O gravitational pull
O convection currents
15 points !!!!
Answer:
The movement of air through Earth's -- or any planet's -- atmosphere is called wind, and the main cause of Earth's winds is uneven heating by the sun. This uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.
Explanation:
When a substance changes from a solid to a liquid what is it called brainlest
A.Freezing
B.Boiling
C.Sublimating
D.Melting
How many cubic cm^3 would be present in a space that is 5.00 in x 4.00 in x 7.00 in?
OK BE HONEST..... anyone here like hawain pizza owo?
Which of the following will produce a 2 molar solution of copper (II) chloride?
Group of answer choices
1- Measure 1 mole of copper (II) chloride and add water until there are two liters of solution
2- Add 1 mole of copper (II) chloride to 2 liters of water
3- Measure 2 moles of copper (II) chloride and add water until there is one liter of solution
4- Measure 1 liter of water and then add to it 2 moles of copper (II) chloride
Answer:
do we have to answer all of them I'm new to this
what is the mass of 74.6% of chlorine
If a car was driving 45 miles per hour northeast, and is now driving 30 miles per hour
north,
A
the car's velocity decelerated.
B
the car's velocity accelerated.
с
the car's velocity remained unchanged.
D
the car's acceleration is 30 miles per hour.
Answer:
A
Explanation:
is hydrogen monoxide covalent or ionic
Answer:
ionic
Explanation:
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.
What is the molar mass of the following compound: Mg2Ba?
Answer:
2(mass no of magnisium)+mass of barium
plug in the values
A 400 grams bird is flying at a constant speed of 7 m/s. What is the bird's kinetic energy ?
Answer:
Kinetic energy is always 12mv2 , which in this case, is 3.2 J. Explanation: 12mv2=12(0.1 )(8.0)2=3.2J.
Explain how to count the number of elements in a compound
Answer:
Using the formula cards again, add the coefficient of 2 in front of the formula and have them recalculate the number of each element and the total number of atoms in each element.
Explanation:
The number of elements in a compound is counted by identifying and counting the chemical symbols represented in the chemical formula
A compound is a substance that is a mixture of more than one elements.
Compounds are made of two or more elements. These elements are represented by their symbols. These symbols can be identified and the number of elements represented by these symbols are counted.
For example, in the compound [tex]H_2O[/tex]:
H represents Hydrogen
O represents Oxygen
The elements in Water ( [tex]H_2O[/tex]) are Hydrogen and Oxygen
Therefore, the number of elements in [tex]H_2O[/tex] is 2
Also in, [tex]NaCl[/tex]
The elements are Sodium(Na) and Chlorine(Cl)
There are two elements in NaCl
Hence, the number of elements in a compound is counted by identifying and counting the chemical symbols represented in the chemical formula
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How many moles are in 2.5 g of N2
O 0089 moles
0.18 moles
13 moles
11 moles
the gas mixture is at STP, what is the partial pressure of the argon?
(A) 152 torr (B) 228 torr (C) 380. torr (D) 760. torr
2.) Compared to the average kinetic energy of 1 mole of water at 0 oC, the average kinetic energy
of 1 mole of water at 298 K is
(A) the same, and the number of molecules is the same
(B) the same, but the number of molecules is greater
(C) greater, and the number of molecules is greater
(D) greater, but the number of molecules is the same
3.) If the pressure on a given mass of gas in a closed system is increased and the temperature
remains constant, the volume of the gas will
(A) decrease (B) increase (C) remain the same
4.) Which gas has approximately the same density as C2H6 at STP?
(A) NO (B) NH3 (C) H2S (D) SO2
5.) At a temperature of 273 K, a 400. milliliter gas sample has a pressure of 760. millimeters of
mercury. If the pressure is changed to 380. millimeters of mercury, at which temperature will
this gas sample have a volume of 551 milliliters?
(A) 100 K (B) 188 K (C) 273 K (D) 546 K
Get the answers to these questions
Back to the Unit 10 Old Tests Page
Back to the Unit 10 Pag
Answer:
A. 0.089
Explanation:
Hope this helps :)
How can we change the forms of water.?
Answer:
By heating or freezing the water
Explanation: Hope this helps
Balance this equation and pick the answer with the coefficients that belong there
Answer:
The answer is 2, 3, 6, and 1
Explanation:
Write down the coefficients of 2, 3, 6, and 1. Try them out and then multiply the atoms together.
2AlBr3 = Al2Br6
3K2SO4 = K6(SO4)3
6KBr = K6Br6
1Al2(SO4)3 = Al2(SO4)3
Al2Br6 + K6(SO4)3 = K6Br6 + Al2(SO4)3
All the reactants and products have the same number of atoms/molecules in each element. Therefore, this equation is balanced.
So the final answer is 2, 3, 6, and 1.
Hope it helped!
Calculate the oxidation number of Cao
Answer:+2 -2
Explanation:
plz help me its easy (: i give brainliest (:
Answer:
Bird eating worm: The bird gains energy from eating its proteins.
Plant recieving sunlight: The plant gains energy from the sunlight and transfers it into sugar and energy for it to continue its cycle.
Light bulb attached to battery: The lightbulb gains electricity and power from the battery until it runs out completely.
whats the definition of efflorescence?
Answer:
efflorescence is the migration of a salt to the surface of a porous material, where it forms a coating.
Answer: Efflorescence is a crystalline or powdery deposit of salts often visible on the surface of concrete, brick, stucco, or natural stone surfaces. It occurs when water leaves behind salt deposits on the masonry surface.
Explanation: NO EXPLANTATION SORRY!
an insoluble substance that crystallize out of solution is called a
Answer:
precipitate
that is the answer hope that helps
Which of the following cooking materials does NOT conduct heat?
A. Silicone
B. Teflon
C. Metal
D. Wood
What is the name of this molecular compound ? F6I5 PLEASE AND THANK YOU
Answer:
Hexaflourine Pentaiodide?
Explanation:
f = flourine (6 = hexa)
i = iodine (5 = penta) + ide
Valence electrons are the number of
Answer:
an be found by determining the electronic configurations of elements. Thereafter the number of electrons in the outermost shell gives the total number of valence electrons in that element.
A solenoid is a coil of wire that produces a magnetic field when carrying an electric current. The strength of the magnetic field
produced by a solenoid can be increased in two basic ways: increasing the number of loops in the solenoid or increasing the
amount of current running through the solenoid. A solenoid's magnetic field can be increased to an even greater degree by wrapping
the wire around a material that can be magnetized. Four solenoids are shown below.
000000000000000
Solenoid A
Copper Wire Only
Current: 6 amps
Solenoid B
Copper Wire Only
Current: 8 amps
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ཤགས་
Solenoid C
Copper Wire + Iron Core
Current: 6 amps
Solenoid D
Copper Wire + Iron Core
Current: 8 amps
Based on the strength of the magnetic fields they produce, arrange the solenoids from strongest to weakest.
Solenoid A
Solenoid B
Solenoid C
Solenoid D
Answer: Motion, providing a burst of power that can move a specific part of the device.
Explanation: Hope this helps
Answer:
D > C > B> A
Explanation:
i solved this on study island
200 feet in 30 seconds is what speed?
Answer:
6.6666666667 feet per second I believe
Answer:
4.5 miles per hour.
Explanation:
30* 2= 400 feet in 1 min
24,000 per hour
5280 feet is 1 mile.