Answer:
method used is decomposition
Explanation:
Hydrogen Peroxide (H2O2) will decompose rapidly in the presence of Manganese Dioxide, acting as the catalyst, to produce Oxygen gas and water.
When the Hydrogen Peroxide and Manganese Dioxide are mixed, Oxygen gas bubbles should be seen coming from the mixture. One can collect this Oxygen gas produced over water (through water-displacement) and store it inside a bottle for later use.
Calculate the wavelength of a photon of light having a frequency of 3.50 x 1015 Hz. A. 1.05 x 1024 m B. 1.33 x 1016 m C. 8.57 x 10-8m D. 1.17 x 107 m
Answer:
1.17x107m
Explanation:
0.20dm
2. How many grams of salt, NaCl need to be dissolved in 0.50dm of solution to
make a 0.20moldm solution?
Answer:
I don't no sorry. ਕਿਉੁਂਕਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ 478figxigxurRyyv ਸ੍
i need help to pass my class
Answer:
B
Explanation:
The attraction is stronger when the magnet is closer so moving it away would decrease the strength.
how much is 3.5 gallons in cups
Answer:
3.6 gallons are equal to 56 cups
Explain what is meant by the natural abundance of isotopes. Can someone help me to answer this plz
Which statement best explains why aluminum is a pure substance? Group of answer choices Aluminum is one type of atom and its composition is always the same. Aluminum has a composition that is evenly mixed. The aluminum atom cannot be seen with a microscope. Aluminum contains substances that are not bonded together.
Answer:
The best explanation for both the first and second claims is that aluminum is a pure substance: Aluminum is one form of atom and its structure is always the same. Aluminum has an evenly blended composition.
Explanation:
Aluminum is one type of atom and its composition is always the same, this statement also gives the property of a pure substance . In fact, pure substances are often homogeneous and contain only one form of atom or molecule.
One of a pure substance's key characteristics is that it has a uniform composition that is homologous in nature, and can be mixed uniformly throughout. ALUMINUM's second statement notes the property of a pure substance. Aluminum is also homologous in terms of occurrence.
The atoms are very small and have a diameter of around 1 x 10-10 meters. It's difficult to view them using a light microscope due to their limited size. Although it may not be possible to view an atom using a light microscope, a number of techniques have been developed, such as electron microscopy, to observe and research the structure of atoms. Therefore, the statement that the aluminum atom can not be seen through a microscope does not explain the pure content of aluminum.
This argument - 'Aluminum contains substances which are not bound together' does not explain the fact that it is a pure material as it notes that the property of a pure material does not exist in relation to its chemical bonds.
.Therefore, the first and second aluminum statements give the best description of a pure material.
Looking at the periodic table, which of theses elements has the smallest atomic radius (A. Sodium B. potasaium C. Hydrogen D. LithIum)
Answer:
The answer is C. Hydrogen
Explanation:
It has a radius of 53 pm calculated.
What is the relationship between the temperature and the rate of the reaction?
negative
neutral
positive
i think it would be neutral
When measuring the volume of a liquid, why is it best to use a measuring container that is narrow?
Answer:
n the sciences, the “tools” for measuring the volumes of liquids are generally made from glass, plastic or occasionally metal, although professionals referred to all of them as “glassware.” Scientists, and chemists in particular, have a variety of glassware at their disposal for measuring volumes. The particular piece of glassware chosen in any situation will depend primarily upon two factors: the required volume and the accuracy required for the measurement.
Explanation:
Hope this helps leave a heart c:
If 5,800 j of energy are applied to a 15.2 kg piece of lead, by how much does the temp change if the specific heat of lead is 0.128
Answer:
The answer will be 2.98K
Explanation:
Using the formula:
Q = mc∆T
Q= 5,800 (heat in joules)
m= convert 15.2kg to g which is 15200g (mass in grams)
c= 0.128 J/g °c (Specific heat capacity)
∆T= what we need to find (temperature change)
5800J = 15200g x 0.128 x ∆T
= 2.98K
what is one way that the thermal energy of a system may be changed?
Answer:
In a open system, the thermal energy of a system may be changed by adding or removing matter with a different temperature.
Explanation:
The thermal energy of a system can be changed when a new substance of different temperature is introduced into the system
The thermal energy of a system is the amount of heat energy contained in that system.
The quantity of heat in a system is given as;
[tex]Q = mc \Delta \theta[/tex]
where;
[tex]\Delta \theta[/tex] is the change in the temperature of the system
When a new substance is introduced into the system, the temperature of the resulting system changes.
For example;
a hot iron introduced into a cold water, will increase the temperature of the water thereby increasing the thermal energy of the water.Thus, the thermal energy of a system can be changed when a new substance of different temperature is introduced into the system.
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An irregular object with a mass of 18.00 kg displaces 2.50 L of water when placed in a large overflow container. Calculate the density of the object.
Answer:
7.20 kg/L
Explanation:
Density is mass (kg) / volume (L).
18.00kg/2.50L = 7.20 kg/L
If you need it in g/mL this is the equation:
[tex]\frac{7.20kg}{L} *\frac{1000g}{1kg} *\frac{1L}{1000mL} = 7.20g/mL[/tex]
What is the difference between a physical and a chemical property? (please hurry)
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. ... A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
Which one of the following is an alkane?
A. C2H4
B. C5H10
C. C3H8
D. C4H6
What is the density of a sample of lead that has a mass of 4.85 kg and a density of 280 cm ^3?
Answer:
The answer is 0.017 kg/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 4.85 kg
volume = 280 cm³
We have
[tex]density = \frac{4.85}{280} \\ = 0.01732...[/tex]
We have the final answer as
0.017 kg/cm³Hope this helps you
1pt According to Einstein's theory of gravity, the more mass an object has, the
O A. denser it will be
O B. more it will warp space
C. faster it will rotate
OD. more moons will circle it
Answer:
B. more it will warp space
Explanation:
what is kwaishokor?
Answer:
Kwaishokor is a form of severe protein malnutrition characterized by edema and an enlarged liver with fattty infiltrates.
Explanation:
what are class C fire extinguishers used for
how many unpaired electrons does calcium have
Answer:
0
Explanation:
The number of unpaired electrons in is 0
Answer:
4 unpaired electrons
Explanation:
becausd it have 4 unpaired electros it is paramagnetic
What is the correct formula for calcium dihydrogen phosphate?
A) CaH2PO4
B) Ca(H2PO4)2
C) Ca(H2HPO4)2
D) Ca2H2PO4
Answer:
B) Ca(H2PO4)2
Explanation:
To solve this we must be knowing each and every concept related to chemical formula. Therefore, the correct option is option B among all the given options.
What is chemical formula?The chemical formula is indeed a means of expressing information about just the chemical proportion of atoms that comprise a certain chemical compound as well as molecule through the use of chemical element numbers and symbols.
Furthermore, the molecular formula does not contain any words and does not serve as a chemical name. However, it just indicates basic chemical structures and is not the same as the entire chemical structural formula. The correct formula for calcium dihydrogen phosphate is Ca(H[tex]_2[/tex]PO[tex]_4[/tex])[tex]_2[/tex].
Therefore, the correct option is option B among all the given options.
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why do astronomers use frequencies other than the visible ones when they are investigating the universe?
25 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer:
Answers in explanation.
Explanation:
30. A (A chemical changes changes the chemical properties)
31. C (rusting is an example of a chemical change
32. B (A reaction requires energy, so some energy will be expelled)
33. B (Color change is an example of a chemical change)
34. A (The law of the conservation of mass: Mass and Energy cannot be created nor destroyed)
i will give brainliest and lots of points
Answer:yyyyyyyyyeeeeeeetttttt you will figure it out
Explanation:
Which of the following is an example of the Law of Conservation of Mass?
Answer:
C.
Explanation:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Answer:
C, since matter cannot be created or destroyed the same number of particles must be present on both sides of the equation. Hence why all chemical reactions must be balanced.
Explanation:
Who wants to do my acellus work? Or know how to get the answers ?
im just answering questions to get points Explanation:
i dont know what points do
Answer:
Hello I passed my Chemistry exam (Acellus) in the beginning of June:)
Explanation:
Why do you think many metals are good at conducting electricity?
Hurry, please!!!
Which of the following represents a pair of isotopes?
A. Ca+2, Be+2
B. 12C, 14C
C. Fe+2, Fe+3
D. 7N, 8O
We have that
the Carbon isotopes represents a pair of isotopes
12C, 14COption B
From the question we are told
Which of the following represents a pair of isotopes?
A. Ca+2, Be+2 B. 12C, 14C C. Fe+2, Fe+3 D. 7N, 8OGenerally
Isotopes
This is defined as variant forms of an element with variant atomic mass but same proton number
Therefore
the Carbon isotopes represents a pair of isotopes
12C, 14C
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Which pair of elements have the same number of atomic orbitals?
A.
Silver and strontium
B.
Sodium and strontium
C.
Silver and sulfur
D.
Sulfur and strontium
Answer:
B I think
Explanation:
Answer:
B, I'm guessing by their characteristics
Calculate the following expression and round your answer to the correct number of significant figures.
52.6cm x 1.214cm
Answer:
63.9 cm
Explanation:
4. How does the water vapor change as altitude increases?
Answer:
it drifts through the atmosphere and the vapor absorbs heat then the warm air rises up therefore leaving the planet's surface and releasing the heat back into the upper part of the atmosphere
