Answer:
Introduction to Basic Microscopy. Microscopes are specialized optical instruments designed to produce magnified visual or photographic (including digital) images of objects or specimens that are too small to be seen with the naked eye.
Microscope are the important tools which are used by scientist. For example, in material science, medicine, mineralogy and microbiology.
Light microscope is able to send light. Light is being focused in a tight breath whereby that light passes through a sample which later it is able to create an image. This image passes to different lenses which magnifies it until it reaches the camera.
There are different types of microscope for example, Compound light microscope, Simple light microscope, and monocular microscope.
In simple light microscope only one lens which which is being used to magnify an object and it is not able to reach to a higher magnification.
In compound light microscope it uses two lenses to produce image. For example eyepiece lens and objective lens.
Explanation:
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Answer:
whatttttttttttttttttttttttt
Answer:
Breaking glass - chemical change
popsicle - physical
milk - chemical
bread - physical
roasting - chemical
egg - chemical
fireworks - chemical
mixing something with water - chemical
popcorn - chemical
colouring hair - physical
melting chocolate - physical
crumpled paper - physical
rusted nails - chemical
crushed can - physical
cooked egg - chemical
bending metal - physical
melting ice - physical
bleaching clothes - chemical
If u want to differentiate between chemcial and physical change u need to remember this-
physical change - no new substance is formed (Even for melting of ice it's still water) and it can be reversible, except for some cases like tearing of paper
chemical change - a new substance is formed
15.24. Calcium hydroxide, also known as slaked lime, is used in industrial processes in which low concentrations of base are required. Only 0.16 g of Ca(OH)2 dissolves in 100 mL of water at 25°C. What is the concentration of hydroxide ions in 250 mL of a solution containing the maximum amount of dissolved calcium hydroxide?
The concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M
We'll begin by calculating the number of mole of in 0.16 g of Ca(OH)₂. This can be obtained as follow:
Mass of Ca(OH)₂ = 0.16 g
Molar mass of Ca(OH)₂ = 40 + 2[16 + 1] = 74 g/mol
Mole of Ca(OH)₂ =?Mole = mass / molar mass
Mole of Ca(OH)₂ = 0.16 / 74
Mole of Ca(OH)₂ = 0.00216 mole Next, we shall determine the molarity of the stock solution of Ca(OH)₂.Mole of Ca(OH)₂ = 0.00216 mole
Volume = 100 mL = 100 / 1000 = 0.1 L
Molarity of Ca(OH)₂ =?Molarity = mole / Volume
Molarity of Ca(OH)₂ = 0.00216 / 0.1
Molarity of Ca(OH)₂ = 0.0216 MNext, we shall determine the molarity of the diluted solution. This can be obtained as follow:Volume of stock solution (V₁) = 100 mL
Molarity of stock solution (M₁) = 0.0216 M
Volume of diluted solution (V₂) = 250 mL
Molarity of diluted solution (M₂) =?M₁V₁ = M₂V₂0.0216 × 100 = M₂ × 250
2.16 = M₂ × 250
Divide both side by 250
M₂ = 2.16 / 250
M₂ = 0.00864 MThus, the molarity of the diluted solution is 0.00864 M
Finally, we shall determine the concentration of the hydroxide ions, OH¯ in the diluted solution. This can be obtained as follow:Ca(OH)₂(aq) —> Ca²⁺(aq) + 2OH¯(aq)
From the balanced equation above,
1 mole of Ca(OH)₂ contains 2 moles of OH¯
Therefore,
0.00864 M Ca(OH)₂ will contain = 2 × 0.00864 = 0.01728 M OH¯
Thus, the concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M
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What is it about water that makes it able to dissolve both polar covalent and iconic substances
Answer:
A solvent is simply a substance that can dissolve other molecules and compounds, which are known as solutes. ... Because of its polarity and ability to form hydrogen bonds, water makes an excellent solvent, meaning that it can dissolve many different kinds of molecules.
Explanation:
serve(s) to increase cellular surface area.
O plasma membranes
O integral proteins
O microvilli
o intracellular fluid
16 A particular light source gives off light waves with a measured wavelength of 2.0 x 10-7 m.
What is the frequency of the light source?
А 6.67 X 10-15 Hz
B 6.0 x 1011 Hz
с 1.5 x 1015 Hz
D Not enough information
Refer to the attachment
Light waves are part of the electromagnetic spectrum. The frequency of light therefore is 1.5 * 10^15 Hz.
What is light?
Light is an electromagnetic wave and we know that the speed of light is a constant which is 3 * 10^8 m/s.
Knowing this; v = λ * f
λ = wavelength
f= frequency of light
v = seed of light
f = v/λ
f = 3 * 10^8 m/s/2.0 x 10-7 m
f = 1.5 * 10^15 Hz
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what type of reaction mechanism is operative in the conversion of 2-methyl-2-butanol into 2-chloro-2-methylbutane?
Answer:
Below
Explanation:
The reaction is a Substitution SN1 mechanism
Which statement accurately describes the bond that forms between carbon and oxygen to create carbon dioxide
Answer:
the bond that forms between carbon and oxygen to create carbon dioxide
A polar covalent bond
what is the purpose of an auxiliary complexing agent?
Answer:
prevent hydroxide formation
Explanation:
Which choice can be classified as a pure substance?
A. heterogeneous mixture
B.solution
C. Homogeneous mixture
D. compound
Answer:
d. compound
Explanation:
compound and elements are pure substances
Give example of 1 solid, 1 liquid and 1 gas solution.
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Relate how a household sponge and water can be used to model
the concept of an unsaturated solution, a saturated solution, and a supersaturated
solution.
The sponge is unsaturated when it is taking in more water. It becomes saturated when it stops taking in water. It is supersaturated when water starts oozing out from the sponge.
A saturated solution contains just as much solute as it normally hold at a particular temperature. An unsaturated solution contains less solute than it can normally hold at a particular temperature. A supersaturated solution contains more solute than it can normally hold at a particular temperature.
We can use a sponge to model these three scenario as follows;
Water continues to enter into the sponge when it is unsaturated, this continues until the sponge becomes saturated with water and takes in no more water. When the sponge becomes supersaturated, water begins to ooze out from the sponge because it can no longer hold more water.
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Oxygen cannot be broken
down into a different
substance. What can we call
oxygen?
Answer:
• Oxygen is an element
Answer:
We can call it an element.
Some substances like chalk, duster, paper, wood, air are not found in the periodic table. why?
Answer:
They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)
If a tissue needs its cells to communicate regularly, then ______ will be most prevalent [occur most often)
O desmosomic junctions
O tight junctions
O gap junctions
O con junctions
There are many different ways that cells can connect to each other. The three main ways for cells to connect with each other are: gap junctions, tight junctions, and desmosomes. These types of junctions have different purposes, and are found in different places.
an increase in enzyme or substrate concentration will
Answer: It will increase the rate of reaction
Explanation:
An increase in enzyme or substrate concentration will increase the rate of reaction.
What is an enzyme?An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell.
Initially, an increase in substrate concentration leads to an increase in the rate of an enzyme-catalyzed reaction. As the enzyme molecules become saturated with substrate, this increase in reaction rate levels off.
The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme.
Hence, an increase in enzyme or substrate concentration will increase the rate of reaction.
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why are protons and electrons attracted to each other
Answer:
Protons have a positive charge. Electrons have a negative charge. The charge on the proton and electron are exactly the same size but opposite. Since opposite charges attract, protons and electrons attract each other.
Explanation:
What happens if metal is in acid?
I'm having a blank
Answer:
it dissolves or disintegrates
Explanation:
what process in the natural world converts radiant energy into chemical energy?
Answer:
Photosynthesis
Explanation:
Photosynthesis is the process in which plants collect radiant energy (from the Sun) and transform it into chemical energy.
Answer:
Photosynthesis is the process in which plants collect radiant energy (from the Sun) and transform it into chemical energy.
Explanation:
BECAUSE I SAID, btw its right i promise
When acids dissolve in water, what is released into the resulting solution?
H+ and OH-ions equally
H+ (hydrogen) ions
OH- (hydroxide) ions
Answer:
H+ (hydrogen) ions
Explanation:
Answer:
H+ (hydrogen) ions
Explanation:
A____ and _______ takes the shape of their containers
Answer:
liquid
gas
Explanation:
liquid has an indefinite shape
gas has an indefinite shape
Answer:
gas and liquid
Explanation:
gas and liquid flow around and take the shape of their containers because the molecules are more spread apart
On the 14 point pH scale, soaps and cleaning solutions are typically -
Question 7 options:
8-14
7
Answer:
I believe the answer is ;_; 8-14
Im sorry if im wrong
Answer: 8-14 is the right answer
Explanation:
What letter represents the critical temperature?
Answer:
b
Explanation:
aluminum can be used to make soft drink cans because of which property?
A. It can be hammered into a thin sheet (malleability)
B.it can reflect light (shininess)
C.It can be drawn into long wires(ductility)
Answer:
A
Explanation:
Malleability describes the property of a metal's ability to be distorted below compression. It is a physical property of metals by which they can be hammered, shaped and rolled into a very thin sheet without rupturing. A soda can's walls are very thin, and therefore express the malleability of aluminum.
what is the potential energy of a 3 kg box lifted to 12.5 meters high?
Answer:
367.5 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 3 × 9.8 × 12.5 = 367.5
We have the final answer as
367.5 JHope this helps you
feeling generous today thank you guys so much
Answer:
16
Explanation:
you can line up the fareinheit and celsius and see that the celsius is 16
Answer:
15 and 290 for the first question, if it drops 30 it will get to be 30 f, -0 c and 273 k
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Earth science
Help plz!
Which piece of information could a person obtain from a contour map?
1.the mineral composition of a mountain
2. the elevation of a mountain 3.the speed of water flow in a river
4.the amount of water in a river
Answer:
2 Elevation of a mountain.
Explanation:
Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes.
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Identify the name of the ionic compound with the formula MgS. Group of answer choices magnesium sulfide magnesium sulfite magnesium sulfate magnesium sulfur
MgS → Mg²⁺ + S²⁻
S²⁻ is known as the sulfide ion. That makes MgS Magnesium Sulfide.
For consideration:
magnesium sulfide MgS
magnesium sulfite MgSO₃
magnesium sulfate MgSO₄
magnesium sulfur Mg & S
Magnesium sulfide is an inorganic compound with the formula MgS.
What is Magnesium sulfideMagnesium sulfide (MgS) is an concerning ancient culture compound made by the consolidation of magnesium (Mg) cations and sulfide (S2-) anions. It is calm of individual magnesium ion (Mg2+) and individual sulfide ion (S2-).
In the formation of magnesium sulfide, magnesium drops two electrons to solve a constant eight of something configuration, making a absolutely loaded magnesium ion (Mg2+). Sulfur, in another way, gains two electrons to complete its outer energized matter structure, happening in a negatively loaded sulfide ion (S2-).
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classical,alchemical,medical and technological traditions were chemistry forerunners. identify the contributions which of these made to the development of chemistry
Answer:
The term “alchemy” brings to mind a cauldron-full of images: witches hovering over a boiling brew, or maybe sorcerers in smoky labs or untidy libraries. Despite these connotations of the mythic and mystical, alchemical follow contend a crucial role within the evolution of contemporary science.
Historically, alchemy refers to each the investigation of nature and an early philosophical and religious discipline that combined chemistry with metal work. Alchemy additionally encompassed physics, medicine, astrology, mysticism, spiritualism, and art.
Alchemy was scientific however it absolutely was additionally a religious tradition. a number of its practitioners had selfless intentions. for example, if alchemists might learn the key of “purifying” base metals into gold, they could gain the flexibility to purify the human soul. At an equivalent time, alchemy has typically been seen as a get-rich-quick theme and plenty of alchemists as charlatans and pretenders. however several alchemists were really serious-minded practitioners whose work helped lay the groundwork for contemporary chemistry and medication.
Explanation:
Alchemy for short answer if needed.
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AMSWER :
CHEMICAL FORMULA :
• WATER - H2O
• CARBONDIOXIDE - CO2
• SODIUM HYDROXIDE - NaOH
• SULPHURIC ACID - H2SO4
• SODIUM CHLORIDE - NaCI
• SODIUM BICARBONATE - NaCHO3
The speed of light is 300,000,000 m/s. What is the frequency of a wave with a wavelength of 6 meters?
Answer:
50,000,000 Hz
Explanation:
Rearrange the formula:
wave speed = frequency × wavelength → frequency = wave speed ÷ wavelength
wave speed = 300,000,000m/s
wavelength = 6m
Substitute in the values:
frequency = 300,000,000 ÷ 6
frequency = 50,000,000 Hz
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