Answer:
rust
Explanation:
Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. An excess of AgNO3 is present. The balanced chemical equation is shown below.
Cu + 2AgNO3 Right arrow. Cu(NO3)2 + 2Ag
The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from reaction of 31.75 g of Cu?
26.95
107.9
215.91
431.82
Answer:
107.9g
Explanation:
Given parameters:
Molar mass of Cu = 63.5g/mol
Molar mass of Ag = 107.9g/mol
Mass of reacting Cu = 31.75g
Unknown:
Mass of Ag produced = ?
Solution:
The reaction equation is given as;
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
The equation is balanced.
We start by find the number of moles of the known;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles of Cu = [tex]\frac{31.75}{63.5}[/tex] = 0.5moles
From the balanced equation;
1 mole of Cu produced 2 moles of Ag;
0.5 mole of cu will produce 0.5 x 2 mole of Ag = 1 mole of Ag
Now;
Mass of Ag = number of moles x molar mass
Mass of Ag = 1 mole of Ag x 107.9g/mol = 107.9g
Answer:
107.9
Explanation:
Which describes a step in the process of forming an ionic bond?
A metal atom loses electrons and becomes a positive ion.
A metal atom gains electrons and becomes a negative ion.
A nonmetal atom loses electrons and becomes a negative ion.
A nonmetal atom gains electrons and becomes a positive ion.
Answer:a metal loses electrons and becomes a positive ion
Explanation:
The answer option which describes a step in the process of formation of an ionic bond is: A. A metal atom loses electrons and becomes a positive ion.
In Chemistry, the three (3) fundamental types of chemical bonds are:
Hydrogen bondsCovalent bondsIonic bondsAn ionic bond can be defined as a type of chemical bond which involves a metallic element transferring one or more electrons to a non-metallic element, in order to become a positive ion.
This ultimately implies that, the formation of an ionic bond typically involves a metal atom losing its electrons to a non-metallic element, in order to become a positive ion.
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How do the products of the reaction relate to the phenol red test and the splint test?
which are geologic evidence?
What element has 47 protons in its nucleus?
a.) sulfur
b.) silver
c.) gold
d.) potassium
NEED ASAP PLZZ!!!
Answer:
b). silver (Ag)
Explanation:
If you look at the periodic table, you just need to look at the atomic number of the element, because the atomic number tells you how many protons there are in the nucleus of the element.
But do be careful because some periodic tables have the molar mass at the top left corner, but the one I use has the atomic number at the top left corner, so make sure you look for the atomic number and not the molar mass.
A clear colorless liquid, Barium Chloride (BaCl), is added
to a clear blue solution of copper sulfate (CuSO4). The
solution tums pale blue and cloudy. After a while, the
cloudy substance all sinks to the bottom of the test tube.
Physical or chemical change and explain.
Answer:true
Explanation:
This statement is correct
Which statement describes the earliest model of the atom?A.An atom is an indivisible hard sphere.B.An atom has a small, dense nucleus.C.Electrons are negative particles in an atom.D.Electrons in an atom have wave-like properties.
Answer:
A). An atom is an indivisible hard-sphere.
Explanation:
The 'Atomic Theory' of Dalton is characterized as the earliest model(came in 1803) which described the atoms as the indivisible and resistant spheres. He used the example of watermelon to elaborate that the atoms of a specific element share similar characteristics and the atoms of distinct elements differ in their mass as well as their size. Thus, option A is the correct answer.
The statement that describes the earliest model of the atom is: A. An atom is an indivisible hard sphere.
An atom can be defined as the smallest, indivisible, basic unit of matter that forms all chemical elements. Thus, an atom is the fundamental (basic) building blocks of matter i.e all physical and chemical substances.
Additionally, an atom defines or determines the structure of a chemical element.
Basically, an atom comprises three (3) main particles and these are;
Neutrons.Protons. Electrons.The earliest (first model) of an atom was proposed by a notable English chemist called John Dalton. In the early 1800s, John Dalton adopted Democritus' theory to formulate the earliest (first model) of an atom.
Dalton's atomic theory described the atom of a chemical element as an impenetrable, movable, indivisible, very small (tiny) but movable hard sphere i.e it cannot be divided into subatomic or very tiny particles.
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several different amino acids join together to form a protein. how do any two types of amino acids differ from one another?
Answer:
It all really depends on the side group the amino acid is on! For instance, out of the 20 side groups used to make proteins, there are only two main groups: polar and non-polar
Why are 99.9% of metals (pure) way more expensive than 95% metals?
Answer:
A pure metal is any metal that has not been joined with any other metal
Explanation:
Answer:
Be cause of The fat
Explanation:
It’s just fat
4. Describe the landforms created at a subducting plate boundary and those created
at a convergent plate boundary between two continental plates. Explain why the
landforms are different.
Answer:Plate Tectonics : Different Plate Boundaries Create Different Landforms and ... Plate Boundary: CONVERGENT ... As the MORE DENSE oceanic plate (OP) subducts under ... Illustration of what is happening ... Two continental plates (CP) move away from each other ... Sea Floor spreading occurs at these mid-ocean ridges.
Explanation:
The landforms created in the subducting plate boundary are mid ocean ridges, fold mountains and islands. Volcanoes and earth quakes are common in these regions.
What is convergent boundary?Plate boundaries are regions of intersections between two tectonic plates. There are three different type of plate boundaries, namely convergent boundaries, divergent boundaries and transform boundaries.
In convergent plate boundaries, two tectonic plates moves close to each other and converge. These plate boundaries gives rise to different types of land forms such as fold mountains, islands etc.
Earthquakes and volcanoes are common in convergent plate boundaries. These type of plate movement is caused by the convection currents in the mantle.
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Choose all the correct answers.
The Jovian planets include:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Choose all the correct answers.
The terrestrial planets include:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Answer both please
Who had a good thanksgiving :D!!!
Answer:
I had a amazing thanksgiving thanks for asking
Explanation:
The relationship between an object's mass (m), its acceleration (a), and the applied force (F) is described in which of Newton's Laws?
A:First Law
B:Second Law
C:Third Law
Answer: so the answer is A
Explanation: The relationship between an object's mass (m), its acceleration (a), and the applied force (f) is F=ma. ... This law requires that the direction of the acceleration vector is in the same direction as the force vectors.
If 76g of sodium reacts with chlorine to produce 214g of sodium chloride, how many grams of chlorine reacted?
Answer:
138g
Explanation:
According to this question, sodium reacts with chlorine to form sodium chloride as follows:
Na(s) + Cl(g) → NaCl (aq)
According to the law of conservation of mass, matter can neither be created nor destroyed, but can only be transferred from one form to another. This means that the mass of the reactants in a chemical reaction must equate the mass of products of that reaction.
Hence, If 76g of sodium reacts with chlorine to produce 214g of sodium chloride, this means that to obey the law of conservation of mass, the mass in grams of chlorine that reacted is 214g - 76g = 138g
In this sense, the combined 76g of sodium and 138g of chlorine (reactants) will equate the 214g of sodium chloride (products) in obeisance to law of conservation of matter.
Which diagram demonstrates active transport?
a. A
b. B
C.
C
d. None of the above
Answer:
c
Explanation:
Diagram C represents active transport which is a type of facilitated diffusion.
What is diffusion?
Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.
There are 2 main types of diffusion:
1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.
2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.
There are 2 types of facilitated diffusion one is osmosis and dialysis.
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Which of the following best describes the difference between the mass of a balloon and the mass of a bowling ball?
Answer:
Explanation:m
At 1 atm and 300 K, this gives n/V = 0.0406 mol/l. For air, which has a molar mass of 29.0 g/mol, this gives a density of 1.18 g/l. Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l. Thus, a one-liter balloon of helium can lift a mass of (1.18-0.164) = 1.02 g. In science, the standard unit of mass is the kilogram (kg). A bowling ball has a mass of about 5 kilograms. Bowling ball weights range from 6 lbs. To 16 lbs. in most cases males will use weights ranging between 12 lbs. and 16 lbs. You might calculate volume using the sphere's radius, circumference or diameter. You can also submerge the sphere in water to find its volume by displacement. Once you know the volume, you can multiply by the density to find the mass.
Hope That Helps
Which of the following is the largest atom?
Na
Al
P
Cl
Answer:
Explanation:
The correct answer is sodium (Na)
HELP!!!!!!!!!
what characteristics of an object is doubled has the greatest effect on the gravitational force between them.
a. their speed of motion
b. their masses
c. their distance from each other
d. their inertia
Answer:
a
Explanation:
is my lucky guess im sorry if im wrong good luck
J.J. Thomson's model of the atom includes all BUT ONE of these features. That is
es )
A)
electrons radiated throughout the positive sphere.
B)
an atom contains both positive and negative charges
C)
the positive atomic charge is spherically distributed.
D)
electrons revolved around the positive nuclear sphere.
Answer:
D
Explanation:
usa testprep!!!!!
_________are horizontal rows on the Periodic Table.
Help me is due tomorrow
What did sewage treatment in Ancient Rome and 19th century London have in common?
Answer:
The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely.
Explanation:
is this Ionic, Covalent, or Metallic?
Answer:
Covalent
General Formulas and Concepts:
Chemistry - Compounds
Ionic Bonds - Forming between a metal and nonmetal Covalent Bonds - Forming between 2 nonmetals Metallic Bonds - Forming between 2 metalsExplanation:
Step 1: Define
NCl₃ - Nitrogen Trichloride
Step 2: Identify
Nitrogen is a nonmetal
Chlorine is a Halogen Gas
Step 3: Confirm
Nitrogen and the 3 Chlorines will have to share electrons and form a Covalent bond.
Answer:
The bond is ionic.
Explanation:
If a nonmetal and a metal bond, it's known as a characteristic of an ionic bond.
The answer above is false, Google "Is nitrogen trichloride an ionic compound" in order to find out why.
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Predict the missing particle or nuclide.
239 Np -> 239 Pu + ?
93 94
Select one:
a. alpha emission
b. beta migus emission
c. positron emission
Answer:
beta minus emission
Explanation:
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
²³⁹₉₃Np→ ²³⁹₉₄Pu + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Circle the elements with similar properties. why did you Circle those?
fluorine, chromium, barium, bromine, chloride, iodine, lithium.
Answer:
bromine, iodine, chlorine, flourine
Explanation:
thdy are all diatomic elements- meaning they can only exust with 2 elements. other diatomic elements include: (theres 7 btw)
-Bromine
-Iodine
-Nitrogen
-Chlorine
-Hydrogen
-Oxygen
-Flourine
Which statement best describes what is happening when water is thrown on a wood fire?
The water transforms the thermal energy to chemical energy.
The water causes a chemical change of the wood which reduces the fire.
The water releases its thermal energy to the fire.
The water absorbs the thermal energy of the fire.
Again, don't answer if you don't know.
Answer:
The water absorbs the thermal energy of the fire.
Explanation:
Thermal energy a form of energy that is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. It is a form of energy which involves the transfer of energy from regions of higher heat content to regions of lower heat content.
A burning wood fire has a higher heat content than water. Therefore, when water is thrown on a wood fire, the water will absorb the heat from the burning wood fire in order to raise its own heat content. since the wood fire has lost heat to water, it would eventually stop burning, whereas the water whose heat content has been raised may have some of its molecules absorbing so much heat that a change of phase occurs to the liquid phase.
what scientists added negatively-charged particles to the model of the atom?
Answer:
J.J.Thomson discovered negatively charged particles by cathode ray tube experiment in the year 1897. The particles were name electrons.
4.00 moles of an ideal gas was found to occupy a volume of
100. L at a pressure of 99.1 kPa and at a temperature of 25.0
°C.
Answer: 8.31
Explanation: they told me it was correct
The value of R for 4.00 moles of an ideal gas at 25°C, 100L of volume and pressure of 99.1 kPa is 99.1 kPa.L / mol.°C.
What is ideal gas equation?Ideal gas equation is a hypothesis which tells about the behavior of gas at different conditions and it is represented as:
PV = nRT, where
P = pressure of ideal gas = 99.1 kPa
V = volume of ideal gas = 100 L
n = moles of ideal gas = 4 moles
T = temperature ideal gas = 25 °C
R = universal gas constant = ?
On putting these values on the above equation, we get
R = (99.1)(100) / (4)(25)
R = 99.1 kPa.L / mol.°C
Hence value of R for ideal gas is 99.1 kPa.L / mol.°C.
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Answer the questions attached in the image below:
.
.
.
.
.
{No spams}
Answer:
vinegar is acidic
water should be neutral but people say since it's pH 7,it will be more alkaline
salt solution is acidic
lemon juice is acidic
sugar solution is alkaline
soap is alkaline
Methyl orange will turn red with grapefruit juice.
Methyl orange will turn yellowish orange or lemme say red with oven cleaner
The addition of pure water to methyl orange will not have an effect on the color and the solution will still be around neutral pH and yellow in color.
Explanation:
Working on number 7
The crystal lattice is a three-dimensional structure.
O True
O False
Answer:
True
Three-Dimensional Lattice
The unique arrangement of atoms or molecules within a crystalline solid is referred to as the crystal structure of that material. ... The crystal lattice represents the three-dimensional structure of the crystal's atomic/molecular components.
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Help question in picture
—————-
Answer:
Ca=2,8,8,2
Ne=2,8
S=2,8,6
Explanation:
bc Ca valance no is 20
Ne """""""""""""""""10
S """""”"""""""""* 16