Answer:
9.1g
Explanation:
Given parameters:
Mass of copper sulfate heptahydrate = 43.2g
Mass of water lost = 34.1g
Unknown:
Mass of copper sulfate = ?
Solution
The copper sulfate heptahydrate is made up of the copper sulfate and water of crystallization which makes it wet.
Mass of copper sulfate heptahydrate = mass of copper sulfate + mass of water
Mass of copper sulfate = mass of copper sulfate heptahydrate - mass of water
Mass of copper sulfate = 43.2g - 34.1g = 9.1g
The mass of copper sulphate that is produce from a wet 43.2 g sample of copper sulphate heptahydrate that is heated until only copper sulphate remains (mass of water lost is 34.1 g) is 9.1 grams.
Using the law of conservation of matter, the mass of the reactant is equals to the mass of the product.
Therefore,
CuSO₄7H₂O → CuSO₄ + 7H₂O
mass of CuSO₄7H₂O = 43.2 g
mass of CuSO₄ = x
mass of H₂O = 34.1 g
mass of CuSO₄ = 43.2 - 34.1
mass of CuSO₄ = 9.1 g
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A compound is made of two or more different atoms joined together. which image would best fit
Answer:
Where is your images?
Explanation:
cant solve the prblm without ur images
if a star were 36 trillion miles from the earth it would be about ___ light years from the earth
Answer:
6.12light years
Explanation:
Given parameters:
Distance of star from earth = 36 trillion miles
Unknown:
Distance in light years = ?
Solution:
A light year is the distance light travels in one year.
1 mile = 1.7 x 10⁻¹³ light years
36 trillion miles = 36 x 10¹² x 1.7 x 10⁻¹³ light years
= 6.12light years
Question: How hot is the sun?
Answer:
5,778 K
Explanation:
which statement below best describes the movement of particles in a gas?
A- the particles vibrate in a fixed position
B-the particles slide easily past one another
C- the particles move freely and are well separated
D- the particles move freely with little free space between the particles.
Answer:
c the particles are spaced out and move freely
Explanation:
Answer:
C). The particles move freely and are well separated
Explanation:
show how acid and base given below dissociates in water
Answer:
HOME is acid
KOH is base
What percentage of Carbon (C) is present in one molecule of
Dichlorodifluoromethane (CF2Cl2), commonly known as Freon, an anti-freezing agent
used in automobiles.
Please round everything to whole numbers for this question. Use the following
masses in your calculations:
C = 12
F = 19
Cl = 35
The percentage of Carbon (C) present in one molecule of
Dichlorodifluoromethane (CF₂Cl₂) : 10%
Further explanationProust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements
With this law, we can calculate how many grams an element is needed to make a compound with a certain mass, as desired
MW Dichlorodifluoromethane (CF₂Cl₂) :
=12+2.19+2.35=120 g/mol
[tex]\tt \%mass~C=\dfrac{12}{120}\times 100\%=10\%[/tex]
which is not a redox reaction?
a. Formation of ammonium sulphate from ammonia and sulphuric acid
b. formation of nitrogen monoxide from ammonia
c. formation of sulphuric acid from sulphur
d. formation of zinc from zinc sulphide
help me please
Answer:
D. formation of zinc from zinc sulphide
Explanation:
A redox reaction could be explained as an artificial reaction in which electrons are moved between two reactants partaking in it. This substitution of electrons can be recognized by examining the variations in the oxidation states of the reacting classes. The generation of hydrogen fluoride is an illustration of a redox reaction. We can crack the reaction down to investigate the oxidation and loss of reactants.
Under a certain set of conditions, the percent yield of a reaction that produces carbon dioxide is 75.0%. What mass in grams of CO2 will actually be recovered if the theoretical yield is 26.7 grams?
Answer:
Actual yield = 20.03g
Explanation:
[tex]% yield = 100.\frac{actual yield}{theoretical yield}[/tex]% [tex]yield[/tex] = [tex]100. \frac{actual \ yield}{theoretical \ yield}[/tex]
Actual yield = % yield.(theoretical yield) / 100
Actual yield = 75.26.7/100
Actual yield = 20.025
Answer: I got 20.025 and then I rounded it to 20.0
Explanation:
What is a non-example of a nucleus? Please give me a non-living thing.
Answer:
They are prokaryotes and both have tough cell walls. ◦ The cytoplasm contains ribosomes, but no organelles. ◦ There is no nucleus for organisms in this category.
Explanation:
Answer:
rock- non living
( Prokaryotes don't have a nucleus)
Explanation:
The volume of an object is 55mL in this city is 30g/mL. what is its mass
Answer:
Mass = 1650g
Explanation:
30g per mL is the density I suppose...
Solve for m!
30g/mL = m/55mL
Multiply by denominator to get numerator!
30* 55 =1650g
m = 1650g
Brainliest Appreciated!
what particles are arranged in a regular pattern
Explanation:
Phases of Matter
Question Answer
Vaporization that occurs at and below the surface of a liquid boiling
A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern crystalline solid
A solid made up of particles that are not arranged in a regular pattern amorphous solid
7. The atomic number equals the number of blank or blank in a stable atom of an element.
Answer:
Atomic Number
Neutral atoms of an element contain an equal number of protons and electrons. The number of protons determines an element's atomic number (Z) and distinguishes one element from another.
Explanation:
Match the term (exothermic) with the correct definition.
energy goes into the chemical and cool downs the surrounding area.
energy leaves the chemical and cools down the surrounding area
energy leaves the chemical and heats up the surrounding area
Answer:
energy leaves the chemical and heats up the surrounding area
Explanation:
What is the volume of a 25 g object with a density of 9.1 g/mL? please help me
Answer:
The answer is 2.75 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{25}{9.1} \\ = 2.747252...[/tex]
We have the final answer as
2.75 mLHope this helps you
Use your answers from questions 1–3 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this experiment and how it was completed. Outline the steps of the procedure in full sentences. It also provides potential answers (your hypothesis/es) relative to what you expected the experiment to demonstrate. This section should be 1–3 paragraphs in length.
Answer:
1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…." 2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.
Explanation:
Answer: the correct answer is A
Explanation:
Chemistry, please help
Answer:
Name ; Nickel(ii)Hydroxide
Formula;NI3O6
Explanation:
Meg used two examples to represent two different states of matter.
Example 1: Young children dancing slowly around one another
Example 2: Newborn babies sitting in their given spots in a crib
Which statement is correct? (1 point)
a
Example 1 represents a gas and Example 2 represents a liquid.
b
Example 1 represents a liquid and Example 2 represents a gas.
c
Example 1 represents a liquid and Example 2 represents a solid.
d
Example 1 represents a solid and Example 2 represents a liquid.
Answer:
c Example 1 represents a liquid and Example 2 represents a solid.
Explanation:
Example 1: Young children dancing slowly around one another
The young children dancing slowly around one another can be pictured as the flow of liquid. In liquids, the molecules are held about weakly and they slide on top of each other. They are held by weak attractive forces. This is clear picture of a liquid.
Example 2: Newborn babies sitting in their given spots in a crib
This is clear example of a solid. In a solid the molecules are held about a fixed spot. The attractive forces in liquids is very great and the molecules therein do not move about randomly.
will give brainliest if answered correctly
Subject is SCIENCE
Answer:
Gram
Centi-
Centimeter
Kilogram
Decimeter
Liter
Decimal System
Kilo-
Kilometer
Area
Which statement describes a positive effect of selective breeding? A. Some desirable traits in a population can disappear. B. Offspring can be prone to genetic diseases. C. Parents can pass on useful traits to offspring, D. A population can end up with a lack of genetic diversity .
Answer:
C. Parents can pass on useful traits to offspring
Explanation:
Answer:
The Answer is C
Explanation:
1. H2SO4, sulfuric acid, contains three different types of atoms: hydrogen (H), sulfur (S), and oxygen (O). Each of these atoms represents a different . Since the three types are combined in a fixed ratio, this means that H2SO4 is a(n) molecule. 2. The smallest unit of matter that retain all of the physical properties of that type of matter is a(n) atom. 3. is anything that occupies space and/or has any substance. 4. If two or more atoms are bonded together, they form a(n) . 5. The scientific study of matter is called . 6. Within a plant, water (H2O) and carbon dioxide (CO2) can be combined (using the energy of sunlight) to produce glucose (C6H12O6) and oxygen (O2). If you were to write out this chemical reaction, water and carbon dioxide are each an example of a(n) while glucose and
Answer:
The blanks can be completed with words in the following sequence
1) elements
compound
2) atom
3) matter
4) compound
5) chemistry
6) reactants
product
Explanation:
In H2SO4, atoms of hydrogen, sulphur and oxygen represent different elements that are combined to form the compound.
The smallest indivisible unit of matter that still retains all the properties of matter is an atom. Matter is anything that has weight and occupy space.
Atoms combine in fixed ratios to form compounds. Chemistry studies matter scientifically and pays specific attention to the changes that matter undergoes.
Considering the reaction of photosynthesis, water and carbon dioxide combine to give glucose so the water and carbon dioxide are reactants while the glucose is the product of the reaction.
What are the alkaline earth metals?
A. Group 2 elements
O B. Group 18 elements
C. The transition metals
D.
up 1 elements
Which subatomic particles are found in the nucleus of an oxygen atom?
F Neutrons and Electrons
G Electrons and Protons
H Protons and Neutrons
J Protons, Neutrons, and Electrons
Answer:
the answer is protons and neutrons
Explanation:because
The subatomic particles are found in the nucleus of an oxygen atom are Protons and Neutrons. Thus, option H is correct.
What are subatomic particles?An electron is defined as a subatomic particle which is charged negatively either bound to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.
The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.
The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.
Therefore,The subatomic particles are found in the nucleus of an oxygen atom are Protons and Neutrons. Thus, option H is correct.
Learn more about subatomic particles here:
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With over 6 billion people living on Earth, it is common for two people to have the same DNA.
True
ОR
False
A wave with a small wavelength has a high frequency.
options:
True
False
What is the name of the group that contains potassium?
O Noble Gases
O Halogens
O Alkaline Earth Metals
O Alkali Metals
Transition Metals
Answer:
Alkali Metals
Explanation:
Which statement correctly describes a characteristic that a scientific measurement tool should have
Answer:
to be procice, it must use small units to take mesurements
Explanation:
a.pex
which bond is the strongest
Answer:
C
Explanation:
When two atoms share electrons, a covalent bond is formed. The more electrons shared between atoms, the stronger the bond. Single bonds have two electrons shared, double bonds have four electrons shared, and triple bonds have six electrons shared.
Therefore, triple bonds are the strongest as they require more energy to break.
Hope that helps.
How many atoms of nitrogen are in the chemical formula Ni(NO3)2?
Answer:
2
Explanation:
bc the 2 that's after a bracket refers to both oxygen and nitrogen, making oxygen 6 bc it already has a 3(3×2=6)
Answer:
2
Explanation:
explain why the reaction between lead (II) nitrate and concentrated sulphuric (VI) acid starts and stops immediately?
Answer:
The reaction produces insoluble lead (II) sulphate which coats the surface of lead (II) nitrate [Pb(NO3)]
which of the following metals are more reactive than mercury? Select all that apply
a. silver
b. iron
c. lithium
d. potassium