Answer:
urban and private sector
Explanation:
how many lone pairs are on the central atom in GeH4?
If it takes 75.0 mL of 1.5 M HNO3 solution to completely neutralize 125 mL of Ca(OH)2, what is the concentration of the Ca(OH)2 solution?
Answer:
0.45 M
Explanation:
The reaction that takes place is:
2HNO₃ + Ca(OH)₂ → Ca(NO₃)₂ + 2H₂OFirst we calculate how many HNO₃ moles reacted, using the given concentration and volume:
75.0 mL * 1.5 M = 112.5 mmol HNO₃Then we convert HNO₃ moles into Ca(OH)₂ moles, using the stoichiometric coefficients:
112.5 mmol HNO₃ * [tex]\frac{1mmolCa(OH)_2}{2mmolHNO_3}[/tex] = 56.25 mmol Ca(OH)₂Finally we calculate the concentration of the Ca(OH)₂ solution:
56.25 mmol Ca(OH)₂ / 125 mL = 0.45 MThe elements least likely to form bonds are found in which group?
15
16
ОО
17
18
Answer:
Group 18
Explanation:
do you think hunter-gatherers are still around today? what makes you think that?
Answer:
yes
Explanation:
some cultures in Tanzania are still follow the old ways
is Pb --> PbSO4 reduction half reaction?
Answer:
No its is the oxidation half
Explanation:
Because Pb lost [tex]2e^{-}[/tex]
and oxidation is losing, I abbreviate it in (OIL) not oil that used in kitchen
OIL=Oxidation Is Losing electrons
If 85.6 grams of water are produced by the reaction then how many grams of calcium hydroxide did you start with?
Answer:
I think it would double it's self
A student performed a similar experiment we have done, with Ag and O to produce silver oxide.
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Mass of crucible, lid, and silver oxide: 31.080 g
Use the above data to calculate the moles of the metal used in this experiment. your answer must include correct significant figures and unit.
Answer:
0.0153 mol
Explanation:
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Number of moles = Mass /Molar mass
Mass of Silver = Mass of crucible, lid, and silver - Mass of crucible and lid
Mass of siilver = 30.958 g - 29.307 g
Mass of silver = 1.651 g
Molar mass of silver = 107.868 g/mol
Number of moles = 1.651 g / 107.868 g/mol
Number of moles = 0.0153 mol
Which characteristic is a property of water
Please help! Will give brainliest
Answer:
Letter C is the answer Hope it helps!
You add 0.300 moles of an acid to enough water to get a total of 0.500 liters of solution. Your molar concentration is?
Formula for diphosphorus decoxide ? And explain
Answer:
It can be represented using the chemical formula P 20 5.It has a molecular weight of 141.945 grams per mole and its density is about 2.39 G/cm 3.It can also be termed as Diphosphorus Pentoxide, Phosphorus(V) Oxide,
Phosphoric Anhydride, Tetraphosphorus Decaoxide, Tetraphosphorus Decoxide.
Take your time please.
Answer:
1.) Eyewash station --> D
2.) Absorbent material --> G
3.) Fire extinguisher --> F
4.) Safety Shower --> E
5.) Biohazard container --> J
6.) Broken glass container --> I
7.) Safety goggles --> C
8.) Lab apron --> H
9.) asbestos gloves --> A
10.) Latex gloves --> B
Explanation:
In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.
These equipments include:
--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.
--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.
--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.
--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.
--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.
--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.
--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.
--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.
--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.
--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards
[tex]Answer :—✔[/tex]
THE OTHER PERSON GAVE THE CORRECT ANSWERWhat is the molarity of a solution that contains 2.14 moles (CH3)2SO in 2.00 L solution?
1.07 M
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Molarity = moles of solute / liters of solutionExplanation:Step 1: Define
[Given] 2.14 moles (CH₃)₂SO
[Given] 2.00 L
[Solve] Molarity
Step 2: Solve
Substitute in variables [Molarity]: x M = 2.14 moles (CH₃)₂SO / 2.00 L solution[Molarity] Divide: x = 1.07 MWhich sentences describe decomposers in a food chain?
They are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic matter. Plants
produce food or energy from raw materials. Plants are also known as autotrophs because they can produce organic compounds from inorganic
chemicals. Bacteria, fungi, worms, and snails recycle the garbage of dead matter and give back nutrients into the ecosystem.
Answer:
hey are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic mattet.
Explanaticuz im naruto uzamaki
1. What is the relationship between a DNA molecule, a gene and a protein?
Explanation:
for example, one gene will code for the protein insulin, which is important role in helping your body to control the amount of sugar in your blood. Genes are the basic unit of genetics. Human beings have 20,000 to 25,000 genes.
PLEASE HELP! How does one determine how much of a molecule is produced in a reaction?
A. The mass of the products is determined by adding the mass of the
reactants.
B. Oxidation states are used to calculate the number of product
molecules.
C. The coefficients and molar masses are used to calculate amounts
of molecules.
D. The molar masses of the molecules tell how many grams of
product will form.
21.Total mass of reactants always equals the total mass of the products true or false
Answer:
True
Explanation:
because its the law of conservation of mass
In the reaction, 2H2(g) + O2(g)
which the reactants appear is:
2H2O(1), the phase of matter in
a) solid.
b) liquid.
c) gas.
d) plasma.
Answer:
b liquid
Explanation:
2H
2
(g)+O
2
(g)⟶2H
2
O(l) is the correction reaction as during formation of water both hydrogen and oxygen are in gaseous form and produces water in liquid form.
Fill in the blanks to complete each statement about the heating of Earth's surface
Earth takes in thermal energy from the Sun in a process called blank.
Sunlight strikes Earth's surface at different angles. This angle is called the angle of blank
Answer: Absorption and insolation
Explanation:
Answer:
what the person above said
If a ball rolling down a hill is half way between the top and bottom, how much potential energy does the ball have compared to kinetic energy?
Answer:
The gravitational potential energy and kinetic energy of this ball should be equal (assuming that there is no energy loss due to friction.)
Explanation:
The ball loses gravitational potential energy as it rolls down the hill. At the same time, the speed of the ball increases, such that the ball gains kinetic energy.
If there is no friction on this ball (and that the ball did not deshape,) all the gravitational potential energy that this ball lost would be converted to kinetic energy.
If the gravitational field strength [tex]g[/tex] is constant throughout, the gravitational potential energy of an object in that gravitational field would be proportional to its height.
If [tex]m[/tex] denote the mass of this ball, the gravitational potential energy ([tex]\rm GPE[/tex]) of this ball at height [tex]h[/tex] would be [tex]{\rm GPE} = (m \cdot g) \cdot h[/tex], which is proportional to [tex]h\![/tex].
The value of [tex]g[/tex] near the surface of the earth is indeed approximately constant (typically [tex]g \approx 9.8\; \rm m \cdot s^{-2}[/tex].)
At halfway between the top and bottom of this hill, the height of this ball would be [tex](1/2)[/tex] of its initial value (the value when the ball was at the top of the hill.) Because the [tex]\rm GPE[/tex] of this ball is proportional to its height, at halfway down the hill, the [tex]\rm GPE\![/tex] of this ball would also be [tex](1/2)\![/tex] its initial value.
However, if there was no friction on this ball (and that the ball did not deshape,) that [tex](1/2)[/tex] of the initial [tex]\rm GPE\![/tex] of this ball was not lost. Rather, these [tex](1/2)\![/tex] of the initial [tex]\rm GPE[/tex] would have been converted to the kinetic energy ([tex]\rm KE[/tex]) of this ball.
Hence, when the ball is halfway down the hill:
[tex]\displaystyle \text{GPE halfway down the hill} = \frac{1}{2}\, \text{Initial GPE}[/tex].
[tex]\begin{aligned}& \text{KE halfway down the hill}\\ &= \text{Initial GPE} - \text{GPE halfway down the hill}\\ &= \text{Initial GPE} - \frac{1}{2}\, \text{initial GPE}\\ &= \frac{1}{2}\, \text{Initial GPE}\end{aligned}[/tex].
Therefore:
[tex]\begin{aligned}& \text{GPE halfway down the hill} \\ &= \frac{1}{2}\, \text{Initial GPE} \\ &= \text{KE halfway down the hill}\end{aligned}[/tex].
In other words, under these assumptions, when this ball is halfway down the hill, the gravitational potential energy and the kinetic energy of this ball would be equal.
chemical energy comes from...
1. chemical change
2. physical change
Answer:
1
Explanation:
Physical change does not cause chemical energy.
An earthquake creates a type of wave that shakes the ground. If a large earthquake occurs in Greece, how can the waves be felt across the sea in Italy?
A.
Waves can be transformed into strong winds that travel across the sea.
B.
Waves do not travel through water, but they can crash the sea into land far away.
C.
Waves can cause a series of earthquakes around the world.
D.
Waves can travel through different media including solid land and water.
How could a solid result from the mixing of two liquids?
Answer:
Combining the two clear colorless liquids is a chemical change because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically. Insoluble means that the solid will not dissolve.
Explanation:
50 POINTS!! PLZ HELP! SCIENCE QUESTION!
Answer:
C im pretty sure
Explanation:
Because it is facing the opposite direction with opposite colors.
3- Write the chemical formula of Alanine and find to which food category it belongs.
Answer:
C3H7NO2
Explanation:
The chemical formula of Alanine is C3H7NO2 and it belongs to almost all food category because it is present in one food of each food category such as dairy products, meat, nuts, soy, and whole grains etc. Alanine is a nonessential amino acid means that it does not directly obtained from the diet but it can be produced by the body using raw materials present in the food.
How much Oxygen would be required to react with 101 g of Methane?
A.101 g
B.202 g
C.303 g
D.404 g
Answer:
404g
Explanation:
4 NH3 +5 02 +4NO + 6H2O
When 70.25 grams of NH3 react, how many moles of H20 are produced?
Answer:
6.19 mol H₂O
Explanation:
4 NH₃ + 5O₂ → 4NO + 6H₂OFirst, we convert 70.25 grams of NH₃ into moles, using its molar mass:
70.25 g ÷ 17 g/mol = 4.13 mol NH₃Then we convert 4.13 moles of NH₃ into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:
4.13 mol NH₃ * [tex]\frac{6molH_2O}{4molNH_3}[/tex] = 6.19 mol H₂OWhy is the law of conservation of mass law and not a theory?
Answer:
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
Explanation:
That is what I think on the subject
A law is more specific, such as this particular description of matter, whereas a theory can be more general and often includes more of a why. Atomic Theory explains why the law of conservation of matter exists; in chemical reactions, atoms simply rearrange and have the same mass before and after.
What is a theory?A theory is a well-thought-out elaboration for natural-world anecdotes that has been built using the methodological approach and incorporates many facts and hypotheses.
A scientific law, in overall, is a description of an observed phenomenon. It does not explain why or what causes the phenomenon.
A scientific theory is an explanation for a concept. It is a common misconception that with enough research, theories can become laws.
A law is more precise, such as this detailed definition of matter, whereas a theory is more general and frequently includes more of a why.
Atomic Theory explains why the law of conservation of matter exists; atoms simply rearrange and have the same mass before and after chemical reactions.
Thus, that's why, the law of conservation of mass law and not a theory.
For more details regarding law of conservation of mass, visit:
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most bones are connected at Joints by
Answer:
Los huesos se mantienen unidos a otros huesos a través de unas largas tiras fibrosas llamadas ligamentos. El cartílago, una sustancia flexible y elástica que contienen las articulaciones, sujeta los huesos y los protege en los puntos donde varios huesos friccionan entre sí.
During the intrusion of the Palisades Sill, contact metamorphism changed sandstone and shale into?
a) diorite
b) marble
c) limestone
d) hornfels
Answer:
i believe it's c but I'm not one hundred percent sure
Explanation: