Answer:
The chemical formula for rust is Fe 2 O 3.nH 2 O
Which is an unlikely isotope of Al?
Al-26
Al-25
Al-27
Al-72
True or false Nitrogen - 15 has 7 neutrons
Answer:
Yes Nitrogen has 7 Neutrons
Explanation:
When you put water in freezer the temperature of the water begins to decrease. what is the cause of this temperature decrease A the water is lose if heat Be the water is absorbing cold from a surroundings. C the water particles are increasing in speed.
D the extra pressure from the colder air causes particles to squeeze together.
Answer:
C, because it will then begin to become a solid but it will still be water but frozen so more like ice then.
how many moles are in 40.0g sulfur dioxide?
High frequency waves have blank wavelengths.
high frequency waves have short wavelengths
When mixing an acid with water, which of the following must always be done?
A.
Never mix an acid with water, it will explode.
B.
Always add the acid to the water slowly, taking a moment to stir between drops.
C.
Always heat the acid before mixing with water.
D.
Always shake both solutions before mixing.
Answer:
B
Explanation:
Answer:
B. Always add the acid to the water slowly, taking a moment to stir between drops
For each of these reactions, calculate the mass (in grams) of the product formed when 4.00 g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant.
Answer:
For Each Of The Reactions, Calculate The Mass (in Grams) Of The Product ... Assume That There Is More Than Enough Of The Other Reactant. ... grams) of the product formed when 3.09g of the underlined reactant completely reacts.
Explanation:
What do you call a question that can be answered through an investigation
Answer:
Indepent variable
Answer:
Scientific Question. A scientific question can be answered through an investigation. What is tested? Scientists call this an independent variable.
Explanation:
Which Group 2A element would you expect to be the most reactive?
beryllium (Be)
calcium (Ca)
barium (Ba)
radium (Ra)
Answer:
Calcium
Explanation:
It has the largest atom
What volume of "laughing gas" (N2O) will be produced from 60 g of nitrogen gas (N2) and 85 g of oxygen gas (O2)? How much of the excess reactant will be left? 2N2 + O2 -> 2N2O
Answer:
94.16g of N2O
50.88g of O2
Explanation:
O2 reacts with N2 as follows:
2N2 + O2 → 2N2O
To find moles of N2O produced we need to convert the mass of each gas to moles to find limiting reactant and the moles of N2O that could be produced:
Moles N2 (Molar mass: 28g/mol):
60g N2 * (1mol / 28g) = 2.14 moles N2
Moles O2 (Molar mass: 32g/mol):
85g O2 * (1mol / 32g) = 2.66 moles O2
For a complete reaction of 2.14 moles of N2 are needed:
2.14 mol N2 * (1mol O2 / 2 mol N2) = 1.07 moles of O2.
As there are 2.66 moles of O2, reactant in excess is O2 and will remain:
2.66 moles - 1.07 moles =
1.59 moles O2. The mass is:
1.59 moles O2 * (32g / mol) =
50.88g of O2And there are produced:
2.14 mol N2 * (2 moles N2O / 2 moles N2) = 2.14 moles N2O.
The mass is (44g/mol for N2O):
2.14 moles N2O * (44g/mol) =
94.16g of N2OWhy do planets rotate around our sun
Answer:
the most basic way i can put it is..
Explanation:
the planets rotate around the sun is because the gravity of the sun keeps them in their orbits. if the sun wasnt there, the earth would literally just travel in a straight line. but the gravity of the sun alters its course, making it travel around the sun.
A student was given a piece of metal with a mass of 85.0 g. She placed it
into a graduated cylinder containing exactly 150 mL of water. When she put
the metal into the water, the water level rose to 172 mL.
What is the volume of the piece of metal?
Answer:
22mL
Explanation:
What is the frequency of a particular type of electromagnetic
radiation with a wavelength of 5.00 x 10-8 m?|
Answer:
f = 0.6× 10¹⁶ Hz
Explanation:
Given data:
Wavelength of radiation = 5.00 × 10⁻⁸ m
Frequency of radiation = ?
Solution:
Formula:
Speed of light = wavelength × frequency
speed of light = 3 × 10⁸m/s
Now we will put he values in formula.
3 × 10⁸m/s = 5.00 × 10⁻⁸ m × f
f = 3 × 10⁸m/s / 5.00 × 10⁻⁸ m
f = 0.6× 10¹⁶ s⁻¹
s⁻¹ = Hz
f = 0.6× 10¹⁶ Hz
PLEASE HELP ASAP
What process is represented by this redox equation?
-
6H20 + 6CO2
C6H1206 +602
A. Cellular respiration
B. Rusting
C. Photosynthesis
D. Combustion
The process representing 6CO₂+6H₂O→C₆H₁₂O₆+6O₂.6CO₂+6H₂O→C₆H₁₂O₆+6O₂ is Option C , Photosynthesis.
What is Photosynthesis ?Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates.
It produces oxygen and glyceraldehyde-3-phosphate (G3P or GA3P), simple carbohydrate molecules that are high in energy and can subsequently be converted into glucose, sucrose, or other sugar molecules.
These sugar molecules contain covalent bonds that store energy.
Organisms break down these molecules to release energy for use in cellular work.
The energy from sunlight drives the reaction of carbon dioxide and water molecules to produce sugar and oxygen, as seen in the chemical equation for photosynthesis.
Though the equation looks simple, it is carried out through many complex steps.
The chemical equation for photosynthesis is
6CO₂+6H₂O→C₆H₁₂O₆+6O₂.6CO₂+6H₂O→C₆H₁₂O₆+6O₂
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a man bought two watches for Rs 2500 each.He sold one of them at 10% . profit and the other at 4% loss.what was his gain or loss percent on the whol
Answer:
Selling price of watch A and watch B= Rs. 425
Let cost price of watch A=x
Profit =10%
∴
100
110
x=425
x=386.36
Let cost price of watch B=y
Loss =10%
∴
100
90
y=425
y=472.22
Net cost price =x+y=858.5858
Net selling price =850
Loss%=
858.58
858.5858−850
×100=1%
Explanation:
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How do you differentiate a neutral solution like water and a strong acid solution like battery acid?
Answer:
If the pH of a solution is less than 7, the solution is called acidic; if the pH is about 7, the solution is neutral; if the pH is greater than 7, the solution is is called basic. In an acidic solution, then, the concentration of hydrogen ions is greater than the concentration of hydroxide ions.
Explanation:
Not sure about the context of the question, but you can check with a ph scale tester.
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Answer:
The formation of natural diamonds requires very high temperatures and pressures. These conditions occur in limited zones of Earth's mantle about 90 miles (150 kilometers) or more below the surface, where temperatures are at least 2000 degrees Fahrenheit (1050 degrees Celsius) [1].
Explanation:
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3. Description of which organelle betul "Creates a physical barrier ;
Regulates the flow of materials into and out of the cell. Recognizes
chemical signals; Creates structure"
A. vacuoles
B. prokaryotic cells
C. cell membrane
Is buoyancy a physical or chemical property?
For each of the following, highlight the element which has the highest:
Atomic Radius: F, Cl, Br
Ionization Energy: K, Ca, Sc
Electronegativity: C, Si, P, N
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Look at the equation for a displacement reaction below. What lost electrons in the reaction? Give the full name, not the symbols.
Answer:
Cupric ions
Explanation:
In the single displacement reaction shown, the cupric ions lost two electrons.
Cu²⁺ + 2e⁻ → Cu
The replacement of a metallic ion in solution by a metal atom higher in the activity series than than the metal in solution falls into this category of reactions.
Since Zn higher in the series, it displacements the cupric ions.
Answer: copper or copper ion
Explanation: The copper ions (Cu2+) gained 2 electrons to form copper atoms.
In 2011, a computer named Watson competed against two humans on a popular television quiz show and won. Watson listened to each question and responded.
1. What similarities and differences are there between a computer like Watson and the human nervous system?
Answer: The Computer: Similarities and Differences. Both use electrical signals to send messages. The brain uses chemicals to transmit information; the computer uses electricity. Even though electrical signals travel at high speeds in the nervous system, they travel even faster through the wires in a computer
Explanation: I hoped that helped. -wear,mask
place the steps of the scientific method in order
make observation
ask a question
develop a hypothesis
analyze data
design experiment
draw conclusions
Which statement accurately describes an object's weight and mass?
A. Both its weight and its mass are the same everywhere in the
universe.
B. Its weight is the same everywhere in the universe, but its mass is
not.
C. Its weight changes with gravitational force, but its mass does not.
D. Its mass changes with gravitational force, but its weight does not.
The statement accurately describes an object's weight and mass is option C. Its weight changes with gravitational force, but its mass does not.
What is gravitational force ?Gravitational force is the force by which an object attracts other objects into its center of mass. Earth attracts every objects into the ground by gravitational pulling. That is why we are all standing on earth's surface.
The mass of an object is the total amount of it. It is fixed and does not change any where. However, the weight we experience on earth is due to the gravity. The weight of object is the product of the mass and acceleration due to gravity of the planet.
Weight of an object will vary from planet to planet with the change in the acceleration due to gravity. The weight we experience in moon is very less compared to that in earth. However our mass is constant. Hence, option C is correct.
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2. Why do bond angles compress when unbonded electrons are present around the central atom?
Answer:
Electron repulsion
Explanation:
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Answer:
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Answer:
are you increasing your followers
Explanation:
if yes then I will follow you
When balancing a chemical reaction what are the small numbers that we do not change?
Answer:
Subscripts
Explanation:
Example:
H2O
2 is the subscript and does not change
An object with a mass of 2.0 kg accelerates 2.0 m/s^2 when an unknown
rce is applied to it. What is the amount of the force?
*
Answer:
The answer is 4 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2 × 2
We have the final answer as
4 NHope this helps you
If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the
element?
Answer:
Explanation:
uestion
If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the
element?
PLEASE HELP!!!!!
What is the most important inorganic compound necessary for all chemical reactions in our body to take place?
1) Water
2)lipid
3)carbohydrates
4)protein
