there are 12 atoms of mg in the following equations
Answer:
[tex]\boxed {\boxed {\sf 12 \ Mg \ atoms }}[/tex]
Explanation:
We are given this formula:
[tex](Mg_3N_2)_4[/tex]
We want to find the number of magnesium atoms. We can see that there is a subscript of 3 after the magnesium, so there are 3 magnesium atoms in 1 molecule of the compound.
However, there is a subscript of 4 that comes after the entire compound, so there are actually 4 molecules, with each molecule containing 3 magnesium atoms. Multiply 4 and 3.
3 Mg * 4 = 12 MgThere are 12 magnesium atoms.
Who want a brainliest? You do? Oh ok. Technically I have to write a question, so answer these...
1 + 1 =
2 + 2 =
4 + 4 =
7 + 7 =
8 + 8 =
(Hint: none of the answers are numbers ;)
Answer:
so wat is it in?.....????
1. too
2. for
3. ate
4.for teen
5. suck`s teen
did i get it right?
An oven cleaning solution is 40.0% by mass NaOH. If one jar of this product contains 454 g of solution, how much NaOH does it contain?
Answer:
182 g NaOH
Explanation:
NaOH= (0.400)(454g)
Can someone please help me with this I’ll mark brainliest
Answer:
for instance when you exercise your muscles increase heat production nudging your body temperature upward.
similarly when you drink a glass of fruit juice your blood glucose goes up
homeostasis depends on that ability of your body to detect and oppose these changes
1. A wave has a frequency of 800 Hz and a wavelength of 2000 cm. What speed
is this wave traveling?
Answer:
V=f*(wavelength)
V= (800)(20m)
16000m/s
Explanation:
how do i make chrystals using home suppplies
You could use sodium accetate a put it in water...
PLEASE HELP ME ASAP!!!!!! YOU GET 10 POINTS!!!!!!
For reaction below, describe how its equilibrium could be shifted in the indicated direction.
1. H2(g)+C12(g)<---------->2HC1(g)+thermal energy: shift to the left
2.C(s) +O2(g)<---------->CO2+thermal energy: shift to the right
Answer:
Here is the ANSWER KEY, it may also has other of the questions you don't know :)
Explanation:
https://sciencewithhorne.weebly.com/uploads/5/7/3/5/57358947/unit_11_hw_key.pdf
I’ll mark BRAINLIEST! Please help!
Answer:
theirs nothing there?!!!??!?!?!??!!?!?!?!?!??!?!??!?!?!??!?!
Explanation:
whys it just a blank picture
Why does the spoon handle look broken where it enters the surface of the water?
Answer:
The spoon appears to be broken because of refraction. Refraction happens when light travels from one medium to another and changes speed and bends. This also causes objects to look different sizes and shapes when they are submerged in water.
Explanation:
To solve this, we must know the concept behind refraction. Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.
What is refraction?Refraction is the bending of a wave as it travels through different media. The two materials' different densities are what lead to the bending. Anytime a light beam enters a material with a differing refractive index at an angle, it refracts. This increase in speed causes a shift in direction.
Due of refraction, the spoon seems to be shattered. When light moves from one medium to another, its speed and direction shift, causing refraction. When items are submerged in water, this also makes them appear to be of varied sizes and forms.
Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.
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what is an epicenter of an earthquake
Answer:
It's the epicenter of an earthquake!
p.s. basically that means it's the center
Answer:
the epicentre of an earthquake is the location directly above the hypocenter the surface of the earth (p.s the hypocenter is the location where an earth quake starts )
Fluorine-21 has a half life of approximately 12 seconds. What fraction of the original nuclei would remain after 1 minute?
Answer:
The correct answer would be = 1/32.
Explanation:
The half-life is the time required for a quantity to reduce to half of the initial value of an object or element.
it is given that Fluorine-21 has a half-life time = 12 seconds
then in a minute the number of half-lives,
12 seconds = 12/60 of a minute or 1/5 of a minute
This means in 1 minute we will half the sample 5 times.
(1/2)^5 = 1/32 is the fractional remainder
Thus, the correct answer would be 1/32.
En una planta de energía, se produce CO2 gracias a la reacción de combustión del material orgánico con oxígeno para producir CO2, SO2, SO3, NO, NO2 y H2O que son los causantes del efecto invernadero, el SO2 reacciona con H2O para formar H2SO3, causante de la lluvia ácida. En condiciones de gas ideal el SO2 se encuentra a una temperatura de 100°C y 0,5 atm de presión, el volumen ocupado generalmente es de 25 L. 5. La ecuación para hallar el número de moles debe ser: a. Gases ideales: relación entre todas las variables que influyen sobre los gases b. Boyle: relación entre volumen y presión c. Charles: relación entre el volumen y la temperatura d. Gay Lussac: relación entre la presión y la temperatura
Answer:
a. Gases ideales: relación entre todas las variables que influyen sobre los gases
Explanation:
La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.
Según la ecuación del gas ideal; PV = nRT
P = presión del gas
V = volumen del gas
n = Número de moles del gas
R = constante de gas
T = temperatura del gas
El número de moles de SO2 se obtiene de;
n = PV / RT
n = 0,5 * 25 / 0,082 * 373
n = 12,5 / 30,586
n = 0,41 moles
The number of protons is equal to
a the number of neutrons.
b the atomic mass.
c the number of electrons.
d the atomic number.
Answer:
c the number of electrons
What is an adaptation?
A.characteristic that has been passed down
B.characteristic that has been recently learned
C.characteristic that has been passed down or recently learned to help survive its environment
D. characteristics that help attract pollinators
Answer:
C
Hope that helps!
Explanation:
Answer:
C. characteristics that has been passed down or recently learned to help survive its environment
list 2 ways mechanical energy can be transformed into non-mechanical energy ?
Answer:
One is the classic example of friction. When two surfaces rub together, they generate thermal energy, or heat. This is a transformation of the mechanical kinetic energy of the objects into the thermal non-mechanical energy (which is small-scale kinetic energy).
Mechanical energy can be used to overcome friction or lost in form of heat in machine parts. Friction and heat are two non-mechanical energy.
Transformation of mechanical energy into non mechanical energy
Based on the principle of conservation of energy, energy can neither be created nor destroyed but can be transformed from one form to another.
Two ways mechanical energy can be transformedThe two ways mechanical energy can be transformed include the following;
FrictionHeatMechanical energy can be used to overcome friction or lost in form of heat in machine parts, in this process, the mechanical energy (kinetic energy) would be converted into other forms of energy such as heat.
Learn more about conservation of energy here: https://brainly.com/question/166559
1. Calculate the mass of alumina (A1203) produced when 250 g of aluminum burns in oxygen.
Answer:
4Al + 3O2 ------> 2Al2O3
the mole ratio is 4:2
you divide 250 by 2
you get 125 and that's the mass produced
If magnesium and nickel were used as electrodes to construct an electrochemical cell like the one shown at right, which metal would form the anode and which the cathode?
anode:
cathode:
Answer:
anode: magnesium
cathode: nickel
Explanation:
edg. 2021
True or False; the atomic number always equals the number of protons, neutrons and electrons found in an atom.
"" ANSWER""
Protons are values of atomic numbers that do NOT change, that is, they are located inside the nucleus of the atom, whereas electrons are located in the electrosphere that can gain or lose electrons, the electron has a negative charge and the Proton positive, that is, if in any atom it wins an electron the atom will be negative and if the atom loses it will be positive because we already know that the number of protons does not change. To calculate the number of neutron we have to make the number of rounded atomic mass which becomes mass less the number of protons for example oxygen gas has 8 protons which is the atomic number and has atomic mass 15,999 which rounding up to 16 to find the number of neutrals we do 16-8 = 8 so now we know that oxygen has: 8 protons, 8 electrons and 8 neutrons but the values will not always be the same but the possibility of protons and neutrals having the same value is 75% by my count .
● ○ ● RULES ○ ● ○ ●
Atomic number = number of protons
Atomic mass ROUNDNESS = mass
Number of neutrons = number of protons - mass number
OBSERVATION- EXPLANATION FOR STUDENTS OF 9 YEARS BECAUSE IN THE HIGH SCHOOL UP SOME CHANGES CHANGE.
■■ GOOD STUDIES ■■
What does chemistry mean?
Answer:
The definition of chemistry is a branch of science that deals with the form and properties of matter and substances or the interaction between individuals.
Pls 50 points right answer gets brainliest
Explain the meaning of thermal energy transfer and give specific examples of conduction, convection, and radiation.
Answer:
Thermal energy transfer involves the transfer of internal energy. The three types of thermal energy transfer are conduction, convection and radiation. ... Those are both good examples of convection, the movement of warm particles from warmer to cooler locations, Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.
Explanation:
Hope this helps!
Answer:
thermal energy: the part of total internal energy that can be transferred (a portion of the kinetic energy)
heat is the thermal energy that flows from one substance to another due to a temperature difference.
Thermal energy is measured in temperature change.
Thermal energy transfer stops when thermal equilibrium is achieved (Both substances at the same temperature).
conduction: Transfer of thermal energy through a solid object like heat transferring up a metal spoon from a hot cup of coffee.
convection: the transfer of thermal energy due to the movement of a liquid or gas caused by differences in temperature. Only in a fluid (liquid or gas). Breezes, ocean currents.
radiation: Transfer energy with or without matter. Warming from the Sun, microwave oven.
What is the percent composition of Mg in the compound Mg3(PO4)2?
Question 8 options:
A. 23.57%
B. 21.92%
C. 27.74%
D. 32.32%
Answer:
c
Explanation:
trust me its reasonanle
Per cent composition of Magnesium (Mg) in Magnesium Phosphate compound ie [tex]Mg_3(PO_4)_2[/tex] is 27.74%. Hence, option C is correct.
What is per cent?Percent is from the Latin adverbial phrase per centum meaning “by the hundred.”
Determination of the percentage composition of Mg in Mg₃(PO₄)₂
Molar mass of Mg₃(PO₄)₂ = 262 g/mol
Mass of Mg in Mg₃(PO₄)₂ = 24×3 = 72 g
Percentage composition of Mg =?
[tex]Percentage = \frac{Mass \;of \;elements x 100}{Mass \;of \;compound}[/tex]
[tex]Percentage = \frac{72 X 100}{262}[/tex]
27.74%.
Hence, option C is correct.
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Using the chemical formulae alone, how can you differentiate between Type I Ionic, Type II Ionic, Type III Ionic, and Covalent compounds?
Explanation:
Type I
These are compounds in which the cation (metal ion) has a fixed charge.
Examples are;
MgO. NaCl
Type II
These are ionic compounds in which the cation (metal ion) has a variable charge.
Examples are;
FeCl3, PbS2
Type III
These are covalent molecules with no cation.
Examples are;
SO3, N2O5
:)
Why is water called.compound
Answer:
because it's composed of two elements, hydrogen and oxygen. water is technically a molecular compound tho, for it has two hydrogens.
Joy mixes one cup of sugar and one cup of lemon juice into three cups of water. The solvent in this recipe is the?
Answer: Water is the solvent in this recipe.
Explanation: A solvent is " a molecule that has the ability to dissolve other molecules". Lemon juice and sugar are solutes.
Why is it important to know characteristics that matter undergoes in chemistry? How can we analyze the relationships between chemical and physical changes and properties?
Extension Questions: What is the study of Chemistry? Who are some of the important people who have contributed to the field? How do regular Americans interact with Chemistry around them?
How can we understand the historical development of the Periodic Table and apply its predictive power?
Extension Questions: Describe different chemical principles and systems. How does the layout of the periodic table allow you predict other element's properties? Consider all types and groups of elements.
Why is it important to know and understand the historical development of atomic theory?
Extension Questions: How does the atom relate to the elements of the periodic table? What are your most common models and how do they relate to the current atomic model? What theories don’t hold true today if any?
How do atoms combine to form ionic, covalent, and metallic bonds?
How can we write and balance chemical equations using the law of conservation of mass?
Answer:
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.
Which of the following elements will have its valence electrons represented in figure B?
A. Boron
B. Phosphorus
C. Chlorine
D. Manganese
Answer:
Answer is B
Explanation:
i need help with d and e
Answer:
D: False
E: Ethane
Explanation:
13.0 g of ammonium chloride in 500 g of water. What is the new BP? (NH,CI=53.491g/mol)
Answer:
hwjwjwkwjwnwnnwnw wiwjwjejejejeje
Directions Identify the reactants and product in the following reaction.
4A1+302 → 2A1203
When collecting temperature as a function of time for the reaction of KOH with HCL, which time is most significant
Answer:
At the completion of reaction.
Explanation:
The time when the reaction take places is the most significant time for measuring temperature of the solution because on this time the temperature will decrease or increase. Some reactions releases heat energy upon completion we called them exothermic reactions whereas some absorb heat energy from the surrounding, decreases the temperature which is known as endothermic reaction so measuring temperature at the completion of reaction is the correct time.
Crossing a Dd parent with another Dd parent results in