Answer:
b
b
Explanation:
Help please!
1. L
2. M
3. X
4. Z
2 points
Identify the basic law on the behavior of matter: States that mass is
neither created nor destroyed in a chemical reaction or physical changes.
Law of conservation of mass
Law of definite proportions
Law of multiple proportions
Identify the scientist that contributed to the atomic theory: He conducted 2 points
d the nucleus has a nositive charge.
Answer:
Law of conservation of mass
Ernest Rutherford
Explanation:
The basic law of behavior of matter that states that "mass is neither created nor destroyed in a chemical reaction or physical change".
This is the law of conservation of mass. It is very essential in understanding most chemical reaction. Also, in quantitative analysis, this law is pivotal.
Ernest Rutherford was the scientist that stated that the nucleus is made up of positive charge. It was not until James Chadwick in 1932 discovered the neutron that we had an understanding of this nuclear component.
Rutherford surmised from his experiment that because most the alpha particles passed through the thin Gold foil and just a tiny fraction was deflected back, the atom is made is made up of small nucleus that is positively charged.
What are some facts about light?
Answer:
A neon lamp was switched on during the Great Depression and continued to burn until it was discovered some 77 years later. The electricity bill came up to a whopping $17 000!
Explanation:
how does the periodic table tell me if a element is solid, liquid, gas, or man made?
Answer:
if you search up the periodic table and go to any website it will let you press on the element and it will say if it is a gas,solid or liquid and it might say if it is man made!
Explanation:
i really hope this helps:)
Look at the equation below.
O2 + CS2 → CO2 + SO2
Which of the following shows the equation balanced?
A.
4 O2 + 4 CS2 → 4 CO2 + 4 SO2
B.
3 O2 + CS2 → CO2 + 2 SO2
C.
3 O2 + CS2 → 2 CO2 + SO2
D.
O2 + CS2 → CO2 + SO2
Answer:
B.
3 O2 + CS2 → CO2 + 2 SO2
Explanation:
study island
What makes a metal and a non metal most
reactive? Where in the PT will you find the most
reactive metal and the most reactive non metal.?
Answer:
Explanation:
The reactivity of elements in the periodic table is based on the number of electrons in there outermost shell. Elements (metals) that have few electrons in there outermost shell are highly reactive because it is easier to lose fewer number of electrons (in the outermost shell during a reaction) than to lose more electrons in the outermost shell - thus metals that have one electron in there outermost shell are most reactive and are more reactive than those that have two electrons in there outermost shell. Hence, metals in group 1 are the most reactive metals because they all have one electron in there outermost shell.
Non-metals that have fewer electrons to complete there octet configuration are highly reactive because it is easier to gain fewer number of electrons (in the outermost shell during a reaction) than to gain more number of electrons - thus nonmetals that have seven electrons in there outermost shell are more reactive than nonmetals that have six electrons in there outermost shell. Hence, nonmetals in group 17 are the most reactive nonmetals because they contain seven electrons and have just one electron left to complete there octet configuration.
Is boiling point and melting point are physical properties? (Answer quicklyyyyy)
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.
2AgNO3 + BaCl2 → 2AgCl + Ba(NO3)2
How many grams of AgCl, silver chloride, are produced from 5.0 g of AgNO3, silver nitrate?
4 g AgCl
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN] 2AgNO₃ + BaCl₂ → 2AgCl + Ba(NO₃)₂
[Given] 5.0 g AgNO₃
Step 2: Identify Conversions
[Reaction - Stoich] 2AgNO₃ → 2AgCl
Molar Mass of Ag - 107.87 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of AgNO₃ - 107.87 + 14.01 + 3(16.00) = 169.88 g/mol
Molar Mass of AgCl - 107.87 + 35.45 = 143.32 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 5.0 \ g \ AgNO_3(\frac{1 \ mol \ AgNO_3}{169.88 \ g \ AgNO_3})(\frac{2 \ mol \ AgCl}{2 \ mol \ AgNO_3})(\frac{143.22 \ g \ AgCl}{1 \ mol \ AgCl})[/tex]Multiply/Divide: [tex]\displaystyle 4.21533 \ g \ AgCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 1 sig fig.
4.21533 g AgCl ≈ 4 g AgCl
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes
the reaction?
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in
the
products
The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the
products
The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the
products
The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the
products
Answer:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products
Explanation:
The expression that best describes this reaction is that the same amount of carbon will be found in the reactants as in the products.
During the process of photosynthesis, carbon dioxide combines with water using solar energy to produce glucose and oxygen.
It can expressed as depicted below:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
To validate our choice;
This is a balanced chemical equation:
6 moles of carbon is found on the reactant side and also, 6 mole of carbon on the product side.
But Glucose is not found on both sides of the expression
Answer:
answer 1
Explanation:
The law of conservation of energy establishes that the masses are not destroyed, they can only be transformed.
Therefore the mass of carbon in the reactants (CO2 and H2O) must be in the products (glucose and oxygen)
so the correct statement is the first
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.
( I know this an old post but uhhh points)
What kind of reaction is this?
Answer:
Single replacement
Explanation:
Chemical equation:
2Al(NO₃)₃ + 3Ca → 3Ca(NO₃)₂ + 2Al
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
All other options are incorrect because,
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AD +CB
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
AB → A + B
Combustion reaction:
Reaction in substance react with oxygen and form carbon dioxide and water.
500 gramos de un mineral con una riqueza en cinc del 65 % se hacen reaccionar con una disolucion de acido sulfurico de riqueza 96 % en peso y densidad 1823 kg/m3 . Calcula:
Answer:
Ver explicación abajo
Explanation:
LA pregunta esta incompleta, pero logré conseguir un ejercicio muy parecido a este con datos similares, y la pregunta que falta como tal son estas:
"a) La cantidad de sal producida.
b) Moléculas de hidrógeno obtenidas a 25 ºC y 740 mm Hg.
c) El volumen de la disolución de ácido necesario para la reacción."
Asumiendo que estos son los datos faltantes, hay que ver como resolver por parte:
a) Cantidad de sal producida.
En este caso debemos plantear la reacción que se lleva a cabo. Es un mineral que tiene Zinc y reacciona con acido sulfurico, por tanto la reacción que se lleva a cabo en teoría es:
Zn + H₂SO₄ -----------> ZnSO₄ + H₂
Entonces, queremos saber la cantidad de ZnSO₄ que se formó.
Para eso, debemos calcular primero cuantos gramos de zinc hay originalmente en la muestra, que son los que reaccionaron para formar esta sal, y luego los moles para que por medio de estequiometría, calculemos los moles de la sal.
Para la masa de Zinc, sabemos que el mineral contiene 65% de zinc o 0,65 entonces:
mZn = 0,65 * 500 = 325 g
Calculamos los moles usando la masa molecular de Zinc que es 65,37 g/mol:
moles = 325 / 65,37 = 4.97 moles
Ahora bien, como la reacción de arriba está bien balanceada, podemos asuimr por estequiometría que la relación Zn / ZnSO₄ es 1:1, asi que los moles de Zn serán los mismos de la sal por tanto:
moles Zn = moles ZnSO₄ = 4,97 moles
Calculando la masa molecular de ZnSO₄:
MM ZnSO₄ = 65,37 + 32 + (16 * 4) = 161,37 g/mol
Finalmente la masa de la sal es:
m ZnSO₄ = 4,97 * 161,37
mZnSO₄ = 802,01 gb) Moléculas de hidrógeno obtenidas
PAra este caso, ya tenemos los moles de Zn, y por estequiometría, todas las especies presentes están en relación 1:1, así que los moles de hidrógeno son los mismos de zinc. No es necesario el dato de temperatura y presión acá pues ya tenemos los moles.
Para conocer el número de moléculas, necesitamos el número de abogadro que es 6.02x10²³ por lo tanto las moléculas de hidrógeno:
Moléculas de hidrógeno = 6,02x10²³ * 4,97
Moléculas de hidrógeno = 2.99x10²⁴ moléculas de H₂c) Volúmen de ácido empleado
Finalmente para el ácido, como ya conocemos los moles empleados, podemos calcular la masa del ácido usando su peso molecular:
MM H₂SO₄ = (2*1) + 32 + (4*16) = 98 g/mol
m H₂SO₄ = 4,97 * 98 = 487,06 g
Ahora que ya sabemos su masa, solo calculamos la masa realmente usada (pues su %p/p es 96%) y con la densidad calculamos el volumen:
d = m/v
v = m/d
m H₂SO₄ (puro) = 487,96 * 0,96 = 467,58 g
El volumen será:
V = 467,58 g / 1,823
V = 256,49 mLEspero que esto te sirva, o te ayude como impulso a tu ejercicio real.
If an atom has an atomic number of 17 and a mass of 35, how many neutron does it have?
Will give brainliest
Answer:
18
Explanation:
(atomic number = protons) mass minus protons= neutrons.
Cu2+ br1- ionic formula
Answer:
yes
Explanation:
When discussing distances between objects in the solar system, which term do you use? (2 points)
Group of answer choices
Actual distance
Apparent brightness
Relative brightness
Relative distanc
When discussing distance in the solar system,you use Relative Distance.This tells you the space between two objects with location.
D. Relative distance
The relative distance is the distance that you are felt to cover up, taking the time used to obtain there. Distance relative to a particular reference point, typically one in motion.
Relative distance is calculated measuring distance, using metrics such as time, effort, or cost.
In space, Relative distance means how far apart the planets are when compared to each other and the sun.
Thus, the correct option is D.
Learn more:
brainly.com/question/16347919
Why does the flow rate of a fluid with large particles increase?
NEED ANSWER ASAP!!!
Answer:
The viscosity of intestinal contents should define the mixing, diffusion and flow of nutrients and other materials in digesta (1–4). The viscosity of intestinal contents has been measured only after the removal of solid particles by centrifugation (5,6), under the assumption that particles or insoluble fibers in the diet do not affect the viscosity of gut contents (7). However, the complete removal of solid particles considerably reduced the coefficient of viscosity of pig cecal contents and changed the contents from a non-Newtonian to a Newtonian fluid in our recent study
Which is the soft stone??
Answer:
Various soft stones were employed, the most popular being lime- stone basalt.
Explanation:
Which is not an indicator for a chemical change?
A. Dissolving sugar
B. Unexpected temperature change
C. Unexpected color change
D. Combustion
Answer:
A
Explanation:
Because it does not change entirely.
Help please Where does your water come from? Your tap or a bottle is not a valid answer.
where the water is actually collected, where it comes from originally, and how it actually gets
delivered to our houses in Southern California
Answer:
-water is collected from nearby water holes and put in a water tower after it's clean
Answer:
Your water comes from rivers and streams.
Explanation:
The water is collected from rivers and stream and gets delivered from the storage tank to the pipes of our house
what us energy stored in an object called
Answer:
potential energy
Explanation:
Answer:
Potential energy is the energy stored within an object, due to the object's position, arrangement or state. Potential energy is one of the two main forms of energy, along with kinetic energy.
Explanation:
*CHEMISTRY*
*WILL GIVE BRAINEST*
A 5-liter sample of gas initially at 50°C is observed to expand to 5.5 liters when the temperature is raised to 100°C. After further increase in temperature, the volume is 6 liters. What is the approximate temperature (within 50 degrees) of the final state of the gas?
O 50°C
O 100°C
O 150°C
O 200°C
Answer:
150
Explanation:
.5 liter increase every temperature 50°C.
5 liter= 50 C
5.5 liter= 100 C
6 liter= 150 C
Explain an example of how energy is transferred from one form to another
Answer:
Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. Similarly, purchased electricity goes into an electric bulb and is converted to visible light and heat energy.
Answer:
Energy is transferred from one this to another in multiple forms, but mostly kinetic.
Explanation:
A certain element is a clear, stable gas at room temperature. An atom of this element has 7 protons, 7 electrons, and a mass number of 15. How many neutrons are in this atom?
Number of neutrons = 8
Further explanationGiven
7 protons, 7 electrons, and a mass number of 15.
Required
Number of neutrons
Solution
Within the atom there are subparticles, namely protons, neutrons and electrons
Protons and neutrons are present in the atomic nucleus, while electrons surround the atomic nucleus in the atomic shell
Atomic number = number of protons = number of electrons
Mass number= number of protons + number of neutrons
15 = 7 + number of neutrons
number of neutrons = 8
magsulat sa iyong sailing lyrics na kanta the tune of meron leron sinta
Answer:
I am sailing
I am sailing
Home again
'Cross the sea
I am sailing
Stormy waters
To be near you
To be free
I am flying
I am flying
Like a bird
'Cross the sky
I am flying
Passing high clouds
To be with you
To be free
Can you hear me, can you hear me
Through the dark night, far away
I am dying, forever crying
To be with you, who can say
Can you hear me, can you hear me
Through the dark night far away
I am dying, forever crying
To be with you, who can say
We are sailing, we are sailing
Home again
'Cross the sea
We are sailing
Stormy waters
To be near you
To be free
Oh Lord, to be near you, to be free
Oh Lord, to be near you, to be free
Oh Lord, to be near you, to be free
Oh Lord
Explanation:
I hope this is the right one
PLEASE HELP I CAN NOT FAIL THIS TEST I REALLY NEED HELP ASAP
Which of the body's systems directly tells the heart when to beat?
OA. the circulatory system
OB. the nervous system
OC. the respiratory system
OD. the digestive system
Answer:
OB. the nervous system
Explanation:
The Medulla Oblongata helps to regulate important functions such as heartbeat and breathing.
1. Define modern periodic Table.
2. Write group names of Halogens and Noble gaises.
3. What is the position of Hydrogen in the periodic Table?
4. Write 2 features of Modern periodic table.
5. Define ‘law of octaves’.
Answer:
The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Columns of the periodic table are called groups. Elements in the same group have similar properties
Answer:
the table used to organize all the known elements is called periodic table.
I don't know other answers...hope my ans have helped you!!
explain
diffusion in solids
have a great day
Answer: Well,diffusion does not happen in solids because the particles are not free to move around and so they cannot inter-mix.
I need help with science pls help me!
PLEASE HURRY THIS IS TIMED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
How many molecules are in 3.0 moles of Carbon Dioxide (CO)?
a 1.8 X 10
c. 2.0 X 1024
24
b. 2.4 x 1023
d. 2.6 X 1024
Answer:
if i remember correctly i beleive its A 1.8 x 10^24
but im not for sure also i think you forgot the 24
Explanation:
What did Dalton's atomic theory teach?
A. The smallest unit of matter is the atom.
B. Atoms can be split into even smaller particles.
C. All matter comes from one kind of atom.
D. All science can be explained by the existence of atoms.
Answer:
C. All matter comes from one kind of atom
I think
Explanation:
Answer: A. the smallest unit of matter is an atom.
Explanation:
just got it right
Help me with this please don’t scam me
Answer:
A is the answer it is correct
Answer:
A
Explanation:
trust me