Answer:
option b
Explanation:
high compressibility is not a property of metal.
b) Explain how a burette and a conical flask should be rinsed before a titration experiment?
[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
If you rinse the burette with the solution to be used, then any tiny amounts of liquid remaining are the same as the solution used to fill the burette, so they will not change the concentration of the solution in any way. This is to prevent contamination.
~⭐Hope it helps you ⭐~
Question 1 (4 points)
Using the 4 pictures below, write a lab safety rule that could go with EACH of the pictures. You should have 4 rules in total (one for each picture)
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Blank # 1 - keep safe distance from the burner
Blank # 2 - Place the equipments on the right place after use
Blank # 3 - perform experiments with proper lab equipment and safety tools
Blank # 4 - Don't break any test tube or lab equipment
(maybe it can be hazardous)
EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)
Answer:
Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.
The process of burning means to react a substance with:
If you tum out all of the lights in a room and shine a green flashlight on to a red apple, what color will you see?
Answer:
black
Explanation:
In white light, a red apple absorbs all the colors (including green) of the spectrum except red, which it reflects.
A green filter absorbs all the colors of the spectrum except green, which is transmitted through the filter (and comes through as green light).
When the green light shines on a red apple, the red apple absorbs the green light.
Since there is no red light shining on the apple, there is no red light to reflect, so the apple appears black.
Hope this helps!
the electron pair geometry around the central iodine in I3- is
The electron pair geometry around the central iodine in I3- is trigonal bipyramidal.
The shapes of molecules is determined by the Valence Shell Electron Pair Repulsion theory (VSEPR). According to this theory, The shape of a molecule depends on the number of electron pairs that surround the valence shell of the central atom in the molecule.
In the structure I3-, the iodine is sp3d hybridized and has a bond angle of 180°. There are three iodine atoms. The central iodine atom is surrounded by two bond pairs and three lone pairs. The electron pair geometry around the central iodine in I3- is trigonal bipyramidal.
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how long does it take cream cheese to get to room temperature?
Since cream cheese has such a high fat content, it doesn't take long to come to room temperature if the room is relatively warm. It takes about thirty minutes on the counter to soften significantly, and about an hour to fully come to room temperature again, depending on the temperature outside and in your kitchen
Which is one factor that adds to the greenhouse effect?
a decrease in the amount of dust in the atmosphere
a decrease in the amount of water on Earth’s surface
an increase in gases in the atmosphere that absorb heat
an increase in the amount of solar radiation that reflects into space
Answer:
C
Explanation:
Edge 2022 trust the process
Knowing about the greenhouse effect we have that what intensifies this effect is an increase in gases in the atmosphere that absorb heat.
What is the greenhouse effect?Greenhouse effect is a natural atmospheric phenomenon responsible for the maintenance of life on Earth. Without the presence of this phenomenon, the temperature on Earth would be very low, around -18ºC, which would make the development of living beings impossible.
Thus, the main cause of the greenhouse effect is industrialization. Due to this process, the burning of fossil fuels has intensified in recent centuries. The main products of the combustion reaction of these reagents are the gases mentioned above as the main ones for the greenhouse effect.
See more about greenhouse effect at brainly.com/question/1577730
Why is lead(II) nitrate: “Pb(NO3)2” and not “Pb3NO2”?
Just a bit confused because it looks a bit funny compared to how I learned how to write compounds.
Explanation:
this is because the combining capacity, ie valency, of Pb is 2 of which NO3 is 1. So, when they will combine by cross method, the compound become Pb(NO3)2 (lead II nitrate).
hope this helps you.
A spoon. A beaker partially filled with liquid. A stirring rod. A graduated cylinder. Distilled water in a spray bottle. Which of the following tools could have become cross-contaminated during the experiment if you had not cleaned them carefully between successive tests? Spoon Beaker Stirring Rod Graduated Cylinder Distilled water in spray bottle.
Answer:
A,B,C,D
Explanation:
Answer:
A,B,C,D
Explanation:
Proof
what is the mass percent of hydrogen in water
Answer:
11.11%
Explanation:
The percentage of an element in a compound is 100 times the fraction, so for water the mass percent hydrogen is 11.11%
Hope this helps :)
can someone help me please
so basically i have to match the vocabulary terms with their definitions
Explanation:
Electrical energy: Kinetic energy caused by moving electrons
Example of energy: lighting
Chemical energy: Energy stored in matter
Example of energy: natural gas
Light energy: a kind of kinetic energy that moves in waves and can be seen
Example of energy: stars
Mechanical energy: Is the sum of an object's kinetic energy and potential energy
Example of energy: dart guns
Answer: Q1.) electrical enegry
Q2.) light energy
Q3.) chemical energy
Q4.) mechanical energy
Explanation:
Q.1) kinetic energy caused by moving electrons ?
eletrical energy
Q2.) what kind of kinetic energy that moves in waves and can been seen?
light energy
Q3.) energy stored in matter ?
chemical energy
Q4.) the sum of an object's kinetic and potential energy ?
mechanical energy
Which of the following is/are considered alcohols?
a CH3OH
b CH3CH2OH
C CH3CH2CH2OH
d All of the above
Answer: THE ANSWER IS D
Explanation:
an alcohol is a hydrocarbon chain with an hydroxyl group (OH)
A, B, AND C ARE ALL ALCOHOLS, SO THE ANSWER IS D
what is the mass of the ice (in kg) composing the iceberg?
Answer:
picture pls
Explanation:
Look at the three kinds of houses shown in the simulation. Which house do you think will best resist damage from a tsunami? Which house will suffer the most damage from a tsunami? Do you think any of the houses will survive a large tsunami? Write down your predictions. https://app.edmentum.com/redirect//358692this link will help the people answer my question the link
Answer:
all the houses will be damaged
Explanation:
i voted for it
Which statements accurately describe elements? Check all that apply.
Elements are made up of two or more types of atoms.
Elements are made up of only one type of atom.
Each element has a unique chemical symbol.
Elements can be identified by their atomic number.
One element cannot be combined with another element.
Answer:
Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.Explanation:
Which of the following elements has the lowest first ionizition energy ?
1 ) Li
2)Mg
3) Na
4) Al
Answer:
I think Mg is correct I am not sure
Rock candy is composed of large sugar crystals, which are made of sugar molecules. Growing the crystals in water with food dyes makes colored crystals. A friend has a plan to make jewelry using rock candy and claims that the jewelry will look like and last as long as jewelry made from gemstones. Use evidence about the bonding in ionic and molecular compounds to evaluate this claim.
It is possible to form jewelry from rock candy that will look like and last as long as jewelry made from gemstones since the both materials contains a crystalline lattice.
Ionic bonding comprises of units cells of oppositely charged ions that come together to form a crystal lattice. Molecular compounds such as gemstones are also composed of unit cells which also give a well defined crystal lattice.
We must note that the strength of these materials come from the fact that all have a well defined crystal lattice in which particles are well ordered. It is possible to form jewelry from rock candy that will look like and last as long as jewelry made from gemstones since the both materials contains a crystalline lattice.
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What results when oxygen reaches a burning splint?
Answer:
Hydrogen (H2) When a burning splint is introduced to a sample of pure hydrogen gas, it will burn with a popping sound. Oxygen (O2) When a smoldering splint is introduced to a sample of pure oxygen gas, the splint will reignite.
Answer:
The burning splinter makes hydrogen and oxygen react and you hear a pop sound.
Explanation:
Two students, Janelle and Corey, are ready to test their designs.
Janelle made her solar oven by lining a piece of poster board with aluminum foil, shaping it into a cone, and placing it over a piece of black paper in an empty box. The food will go in a plastic sandwich bag on top of the black paper in the center of the cone. The image shows Janelle's cone oven.
cone shaped solar oven
Corey made his solar oven by lining the inside of a shoe box with black paper, placing a piece of plastic wrap over the bottom of the shoe box, and lining the lid of the box with aluminum foil. He used a pencil to prop the lid open at an angle. The food will go on the black paper under the plastic wrap. The image shows Corey's shoe box oven.
shoe box solar oven
Janelle's and Corey's designs both use aluminum foil, black paper, and either a plastic bag or plastic wrap. What is the purpose of each of these materials in the designs?
Anwser
my anwser is both will absorb and the will retain
Janelle made her solar oven by lining a piece of poster board with aluminum foil, shaping it into a cone, and placing it over a piece of black paper in an empty box. The food will go in a plastic sandwich bag on top of the black paper in the center of the cone. The image shows Janelle's cone oven.
cone shaped solar oven
Corey made his solar oven by lining the inside of a shoe box with black paper, placing a piece of plastic wrap over the bottom of the shoe box, and lining the lid of the box with aluminum foil. He used a pencil to prop the lid open at an angle. The food will go on the black paper under the plastic wrap. The image shows Corey's shoe box oven.
shoe box solar oven
Janelle's and Corey's designs both use aluminum foil, black paper, and either a plastic bag or plastic wrap so that means that they both absorb and they will retain and is u ever do it do not put it under a shave
The height that mercury reaches in the tube of a manometer ................on the diameter of the tube.
Answer:
does not depend
Explanation:
Answer:
DO NOT DEPENDEDExplanation:
I hope it's help u
Study the chemical equation.
Na + Cl2 → NaCl
Is the chemical equation properly balanced?
A clasping handshake may be used as an analogy for an enzyme-catalyzed reaction because it represents the specific manner in which an enzyme ________. folds to form secondary and tertiary structures interacts with water binds substrate is denatured by low pH
A clasping handshake is similar to the way in which enzymes bind to substrates in enzyme-catalyzed reactions.
Enzymes are biological catalysts that speed up the rates of biological reactions by lowering the minimum energy required by reactants in order to arrive at products.
Enzymes are able to achieve this feat by substrate-enzyme binding. The substrate binds to the enzyme in its active site, becomes products, and the products are released from the active site of the enzyme. Thus, the enzyme is free for the binding of another substrate.
More on enzyme-catalyzed reactions can be found here: https://brainly.com/question/6658074
diagram of paper chromatography from a chemistry textbook
Calculate the mass of iron formed when 299g of iron (ii) oxide is reduced by excess carbon monoxide
Answer:
Mass = 88.12 g
Explanation:
Given data:
Mass of iron oxide = 126 g
Mass of iron formed = ?
Solution:
Chemical equation:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Number of moles of iron oxide:
Number of moles = mass/molar mass
Number of moles = 126 g/ 159.69 g/mol
Number of moles = 0.789 mol
Now we will compare the moles of iron with iron oxide.
Fe₂O₃ : Fe
1 : 2
0.789 : 2/1×0.789 = 1.578 mol
Mass of iron:
Mass = number of moles ×molar mass
Mass = 1.578 mol × 55.84 g/mol
Mass = 88.12 g
1. How much energy is required to heat 32.5g of water from 34°C to 75°C?
Answer:
5.850 kJ (of heat energy)
Explanation:
What we need:
[] The mass of the material = m = 32.5g
[] The temperature change that occurs = ΔT = 43
() 75 - 34 = 43
[] The specific heat capacity of the material = c
() This is the amount of heat required to raise 1 gram of that substance by 1°C
() For water, this is 4.186Jg°C
The equation to use:
Q = m * c * ΔT
Q = 32.5 * 4.186 * 43
Q = 5849.935 J
Q = 5.850 kJ
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Answer:
[tex]\boxed {\boxed {\sf 5569.85 \ Joules}}[/tex]
Explanation:
We are asked to find how much energy is required to heat a sample of water.
We will use the following equation:
[tex]q= mc \Delta T[/tex]
The mass of the water is 32.5 grams. The specific heat capacity of water is 4.18 Joules per gram degree Celsius.
The change in temperature is the difference between the final temperature and the initial temperature. The water's temperature is raised from 34 degrees Celsius to 75 degrees Celsius.
ΔT= final temp - inital tempΔT = 75 °C - 34 °C = 41 °CNow we know all three variables:
m= 32.5 g c= 4.18 J/g °C ΔT = 41 °CSubstitute the values into the formula.
[tex]q= (32.5 \ g)(4.18 \ J/g \textdegree C)(41 \ \textdegree C)[/tex]
Multiply the first 2 numbers together. The units of grams cancel.
[tex]q= 135.85 \ \ J/ \textdegree C(41 \ \textdegree C)[/tex]
Multiply again. This time, the units of degrees Celsius cancel.
[tex]q= 5569.85 \ J[/tex]
5,569.85 Joules of energy are required.
If an organic compound has a carbonyl group and a hydroxyl group, with the carbonyl group connected to two R groups, is it considered an alcohol or a ketone? Or can it have properties of both?
Answer:
A carboxyl group (COOH) is a functional group consisting of a carbonyl group (C=O) with a hydroxyl group (O-H) attached to the same carbon atom. Carboxyl groups have the formula -C(=O)OH, usually written as -COOH or CO2H.
Which animal resembles their parents already after being born or hatched?
10m/s for 30 seconds
Answer:
300 meters for 30 seconds
Explanation:
10*30= 300 therefore giving you your answer.
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EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
Answer:
Again, Microscopes discovered a lot of things in biology like the prokaryotic cells, Bacteria and Archaea, aswell as parts of an organelle/cell.