Answer:
The law of conservation of mass states that mass is neither created nor destroyed but the mass of the system must remain constant over time. The total number of atoms in the reactants is equal to the total number of atoms in the product. Therefore, this chemical equation shows that energy is conserved and demonstrates the law of conservation of mass.
The given chemical equation, the total number of the magnesium, hydrogen, oxygen and nitrogen in the reactant is same in the product too.
Law of conservation of mass:
Mass is neither created nor destroyed but the mass of the system is always remain constant in the reaction.
The total number of atoms in the reactants must be equal to the total number of atoms in the product of a reaction.
For example-
[tex]\bold {Mg(OH)_2 + 2HNO_3 \rightarrow Mg(NO_3)_2 + 2H_2O}[/tex]
The total number of the magnesium, hydrogen, oxygen, and nitrogen in the reactant is same in the product too.
Therefore, the given chemical equation, the total number of the magnesium, hydrogen, oxygen and nitrogen in the reactant is same in the product too.
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Explain why it is difficult to classify selenium as either a metal or a non-metal
Answer:
The melting/ boiling point of selenium is closer to that of sulphur (a non-metal), compared with metals and metalloids. This shows selenium is more likely to be a non-metal, just like sulphur.
Selenium is classified as a metalloid. It has properties of both metals and non-metals, making it difficult to classify as either a metal or a non-metal.
Selenium is generally considered a non-metal, but it has some characteristics of metals as well. It is a semiconductor and an excellent conductor of electricity. Selenium has six valence electrons, which is one less than a typical non-metal, but it is also not a typical metal. Its properties place it in the intermediate category of metalloids.
A type of chemical element known as a metalloid possesses a significant number of properties that fall somewhere in between those of metals and nonmetals or are a combination of them. There is no universal definition of a metalloid, and there is no consensus regarding which elements constitute metalloids.
Metalloids are typically solid at room temperature and are brittle, somewhat shiny substances. Electronic band structures of metalloids are known to be comparable to those of semiconductors or semimetals. Amphoteric or weakly acidic oxides are known to form from metalloids.
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Used when your body moves. *
A. nuclear energy
B. radiant energy
C. chemical energy
Answer:
Hello! I think it is chemical energy. Nuclear energy can be ruled out and radiant energy is energy transfered using electromagnetic radiation. I hope this helped. Have a great day!
what happens to the joints when you move the bones of the tight or wings?
Answer:
Ligaments are composed of strong fibrous connective tissue that connects bones. Your ligaments can be tight and may pop when you suddenly move or rotate at an unusual angle. This can cause a jolt of pain, or it may not cause any pain at all.
Explanation:
PA BRAINLIEST
What is the definition of Feild
Answer:
the printed pattern from a reticle
Explanation:
field, In physics, a region in which each point is affected by a force.
Marking as brainliest!
Answer:
A) Ionic Compound Formula: LiBr
B) Ionic Compound Formula: MgCl2
Ionic Compound Name: Magnesium Chloride
C) Cation: Cu+2
Anion: F-1
Ionic Compound Name: Copper (II) Flouride
D) Cation: Fe+3
Anion: O-2
Ionic Compound Formula: Fe2O3
Explanation:
I hope these answers help. If there is any that's wrong please tell me.
Using the first equation in HQ11.43, how grams of O2(g) will be needed to produce 55.0 kJ of heat if reacted in excess H2(g)
A reduction in the mass of oxygen available to react with the hydrogen,
reduces the heat produced.
The mass of O₂(g) needed to produce 55.0 kJ if reacted in excess H₂(g) is approximately 3.08 grams.Reasons:
The chemical equation for the reaction obtained online is presented as
follows;
[tex]\displaystyle H_2(g) + \frac{1}{2} O_2 (g) \longrightarrow H_2O(g), \ \Delta H^{\circ} = -285.82 \, kJ[/tex]
From the above equation, one mole of H₂ reacts with half [tex]\left(\dfrac{1}{2} \right)[/tex] mole of O₂
to produce 285.82 kJ.
Therefore;
[tex]\displaystyle 55.0 \, kJ \ will \ be \ produced \ by \ \dfrac{55.0}{285.22} \times\dfrac{1}{2} = \frac{1375}{14291} \approx 9.62 \times 10^{-2} \ moles \ of O_2[/tex]
Molar mass of O₂ = 31.999 g/mol
Mass = Number of moles × Molar mass
Mass of oxygen gas, O₂, required, m, is therefore;
m = 9.62 × 10⁻² moles × 31.999 g/mol ≈ 3.08 grams
The mass of O₂(g) needed to produce 55.0 kJ if reacted in excess H₂(g), m ≈ 3.08 gramsLearn more here:
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The equation in HQ 11.43 as obtained online is presented as follows;
[tex]\displaystyle H_2(g) + \frac{1}{2} O_2 (g) \longrightarrow H_2O(g), \ \Delta H^{\circ} = -285.82 \, kJ[/tex]
A foliation
B. grains
C. igneous rock
D. lava
E lithification
1. a naturally occurring solid mixture made of
minerals, rock fragments, organic matter, or glass
2. the individual particles in rocks
3. type of rock that forms when magma or lava
cools and hardens
4. molten rock found inside Earth
5. molten rock that erupts onto Earth's surface
6. type of rock made of layers that are pressed or
cemented together
7. process through which sediment turns into rock
8. type of rock that results from changes that occur
in existing rocks
9. name for the original rocks that are changed into
metamorphic rocks
10. Metamorphic rock sometimes has this layered
appearance.
F.
magma
G. metamorphic
H. parent rock
i rock
J. sedimentary
Answer:d
Explanation:
tu sabias que existe el automovil que funciona solo con agua y hay otro que solo funciona con h2? pero lastimosamente estados unidos matò al creador para que no quebraran las petroleras con sus intereses
Dios mío, vaya, eso es una locura, no lo sabía, pero gracias por la información. :)
A product has a ingredients of: Aqua, Isopropyl Alcohol, Betaine, Tocopheryl Acetate, Niacinamide, Sodium Starch Octenylsuccinate, Calcium Patothenate, Maltodextrin, Sodium Ascorbly, Phostate, Pyridoxine Hydrochloride, Silica, Poly(hexamethylenebiguanide) Hydrochloride, fragrance.
List three (3) elements present and write it's electron configuration.
Answer:
Explanation:
NUMBER ELEMENT ELECTRON CONFIGURATION
1 Hydrogen 1[tex]1s^{1}[/tex]
2 Helium [tex]1s^{2}[/tex]
3 Lithium [Helium] [tex]2s^{1}[/tex]
3. When Group 2 elements form ions, they
A. gain two electrons
B. lose two electrons
C. gain two protons
D. lose two protons
Answer:
don't understand make it clear
how can you use plate in a sentence?
Answer:
my food was on the plate
Explanation:
Answer: Pointing his fork at her plate , he spoke sternly. ...
He set his plate on the table and dropped into the chair. ...
I have enough on my plate already. ...
"Well," Bordeaux conceded, sliding his plate away. ...
"I suppose not," he finally said as he spooned mashed potatoes into his plate .
Explanation:
How many atoms of each element in the following chemical equation:
3 CO + 8 H2O + 4 SO2
+
C =
0 =
H =
S =
C-3
(3CO)
O-19
(3CO)+(8H²O)+(4SO₂)
H-16
(8H₂O)
S-4
4(SO₂)
Due Tomorrow: What element is in group 14, period 5
Answer: Lead (Pb)
Explanation: lead is in the 14th column (group) and 5th row along (period) on the periodic table of elements
A kind of kinetic energy that moves in waves and can be seen
Answer:
Radient energy
Explanation:
Radiant energy is the type of energy that travels by waves.
I want help solving this question
Answer:
1.04 is the amount he should take every day but it is not in the options, so estimate to the nearest value.
Explanation:
It is Option C If C is 1.0.
it is probably option A as it is the closest to 1.04.
you must clarify the question And options more.
If an element has Atomic number 25, and Atomic mass 55. What element is this one? Write the name and the symbol
Answer:
Manganese
Explanation:
Mn
What is the charge of the ion formed when nitrogen obeys the octet rule?
The octet rule is the understanding that most atoms seek to gain stability in their outer most energy level by filling the s and p orbitals of the highest energy level with eight electrons.
Nitrogen has an electron configuration of 1s²2s²2p³ this means that nitrogen has five valence electrons 2s²2p³ .
Nitrogen seeks out three additional electrons to fill the p orbital and gain the stability of a noble gas, 1s²2s²2p⁶ .
However, now nitrogen has 10 electrons and only 7 protons making it a -3 charge anion
N−³.
HELP ME PLSSSS
The table lists some compounds found in foods and their formulas. Based on this information, which of these statements is NOT true?
A) A molecule of maltitol has twice as many atoms as a molecule of glucose does.
B) A molecule of xylitol contains half as many atoms as a molecule of glucose does.
C)A molecule of sucrose has twenty-three more atoms than a molecule of xylitol does.
D) A molecule of glucose has the same number of hydrogen atoms as a molecule of glucose does.
Answer:
B
Explanation:
B is not true
that is the answer
Answer:
answer Is B. "A molecule of xylitol contains half as many atoms as a molecule of glucose does."
Explanation:
name the type of reaction involved in the conversation of ethanol to Ethan
False and Ture
Air is denser
near Earth's
surface than
high in the
atmosphere.
Answer:
Wind is the movement of air from an area of low pressure to an area of high pressure. TRUE. As you move upward from Earth's surface, wind speeds increases because the air meets with less friction from Earth's surface.
Question 14 of 25 A certain mass of nitrogen gas occupies a volume of 4.44 L at a pressure of 5.80 atm. At what pressure will the volume of this sample be 6.82 L? Assume constant temperature and ideal behavior.
When converted to a household measurement, 9 kilograms is approximately equal to a) 9000 grams. b) 9000 ounces. 19.8 ounces. d) 19.8 pounds.
Answer:
D 19.8
Explanation:
1kg in household measurement is equal to 35.274 Oz 35.274*9=317.466 Oz
1 KGS is also equal to 2.205 lbs 9*2.205=19.8416
When converted to a household measurement, 9 kilograms are approximately equal to 19.8 pounds. Therefore, option D is correct.
What is pound ?The British imperial and American customary systems of measurement both utilize the pound as a unit of mass. It is stated that a kilogramme (kg) weighs 2.2 times more than a pound (represented as lbs). As a result, 2.26 pounds equal one kilo of mass.
The pound has strong connections with Britishness, yet it also has roots in continental Europe. Its name, Libra Pondo, which translates as "a pound weight," comes from the Latin word Libra, which means weight or balance.
Approximately 0.45359237 kilogrammes make up one pound (kg). The provided pound value is multiplied by 0.45359237 to convert a pound to kilograms. Additionally, a kilogramme is about equivalent to 2.2046226218 pounds.
1kg in household measurement = 35.274 Oz 35.274 * 9
=317.466 Oz
1 KGS = 2.205 lbs 9 * 2.205
= 19.8416
Thus, option D is correct.
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A student wants to perform an experiment to study the relationship between the temperature and pressure of an enclosed gas. In one or two sentences, describe two assumptions that must be made in performing this experiment.
Given what we know about the relationship between the pressure and temperature of an enclosed gas, two assumptions we can make about the experiment performed by the student is that the volume of the enclosure will remain constant and that the amount of gas between each trial will also remain constant.
When performing an experiment to study the pressure-temperature relationship of a gas, we can always assume that the factors mentioned above will remain constant. In order to measure the data desired by the student, he will have to use the Ideal Gas law formula.
Given that this formula includes:
PressureTemperatureVolumeAmount of gasas variables to be considered in order to make calculations, we must assume that volume and the amount of gas will remain constant. Otherwise, the results will not be accurate as we will not know if these changes affected the pressure or temperature the student has measured.
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Answer:
the volume of the enclosure will remain constant and that the amount of gas between each trial will also remain constant.
Explanation:
What causes anions to have a negative charge a the gaining of electrons b the loss of electrons c the gaining of protons d the loss of protons
Answer:
Anions. Some atoms have nearly eight electrons in their valence shell and can gain additional valence electrons until they have an octet. When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons. Negatively charged ions are called anions.
World War 2 was a
war.
continental
civil
global
Pls helppppp
Answer:
so slaves can have there own rights,so the states can still be united and it would be backwards to only have 7 8 9 states
Explanation: please mark me as brainlist
There are eight elements in the second row (lithium to neon) of the periodic table.
Answer:
lithium, beryllium, boron, carbon, oxygen, fluorine and neon
Explanation:
There are eight elements in the second row (lithium to neon) of the periodic table as the second row can has 2 shells and second shell has maximum capacity of 8 electrons.
What is periodic table?Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
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plate movements on earths crust creates?
Answer:
Earthquakes and Volcanos?
Explanation:
I'm a little unsure about my answer, however, I do have some insight backing my answer. Earthquakes happen when the plate tectonics shift into each other, causing them to collide. Then for volcanos, the plate tectonics shift from convection current and molten rock from the mantle come to the surface.
The first eight ionization energies of a third row element are 578, 1817, 2745, 11577, 14842, 18379, 23326, and 27465 kJ/mol. Identify the element.
The only group three element in period 3 is aluminium. Therefore, the element is aluminium.
First Ionization energy is defined as the energy required to remove the first electron from the valence shell of an atom. We know that there are n ionization energies for an atom where n = number of electrons in the atom.
If we look at the eight ionization energies listed; 578, 1817, 2745, 11577, 14842, 18379, 23326, and 27465 all in kJ/mol, we will discover that there is a quantum jump between the third and the fourth ionization energy which indicates that the fourth electron is being removed from an inner shell.
The valence shell therefore must contain three electrons. Since the element is in period 3, the only group three element in period 3 is aluminium. Therefore, the element is aluminium.
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Help me out please !!
What is the force required to pull a spring 0.5m if the spring constant is -3N/m
Answer:i think its right because i had this one before
2u+3u+8u=0
