Answer:
sugar dissolving in water
Explanation:
at the end mixing 2 substances and not get a new substance is not a chemical change. the sugar is still sugar even when its in water.
collectiveness leads to a good society? how
Answer:
A good society has a transparent talk, they share all matters related to the society, hence everyone knows what's going on. This is why collectiveness leads to a good society.
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Click the picture please
Answer:
A chemical change can be indicated by a change in color, change in temperature (exothermic or endothermic), change in smell, formation of a precipitate, or the formation of gas bubbles.
Explanation:
this should work
perform the following operation and express the answer in scientific notation
Answer:
2×10⁻⁴
Explanation:
Given data:
2.8 ×10⁻⁶ + 1.4×10⁻²
Solution:
2.8 ×10⁻⁶ + 1.4×10⁻²
2×10⁻⁶⁺²
2×10⁻⁴
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be places in orbit around Earth in order to observe short-wavelength radiation?
Answer: gamma-ray telescopes
Explanation:
this is the answer because the question is asking what telescope must be
placed to observe SHORT-WAVELENGTH radiation. Gamma-rays have very short wave-lengths so therefore it would be gamma-ray telescopes. visible, infrared, and radio all have long wave-lengths, so we can instantly eliminate them.
The Earth's atmosphere is known to be able to blocks all X-rays from space. telescopes must be places in orbit around Earth in order to observe short-wavelength radiation is gamma-ray telescope.
X-rays is known to have high energy that are in reflecting telescope. Gamma rays from space is commonly blocked by the Earth's atmosphere as the radiation is lethal.
Gamma-ray telescope is known to be an instrument that is created to detect and resolve gamma rays from space. that is beyond Earth's atmosphere.This rays are able too be detected by the optical flashes that they emit when interacting with the material in a particular defined instrument.
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If an ion gains one or more electrons, it becomes a
Answer:a negative charge
Explanation:
while an atom that gains electrons and becomes negatively charged is known as an anion.
explain how you would obtain pure water from tap water.Your answer must include reference to the principles involved under the topic separating mixture
Answer:
Simple distillation
(02.01 LC)
Which landform represents a large area of thick ice that moves slowly?
Answer:
Glacier
Explanation:
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Answer: Nitrogen
Explanation:
When a 0.4500 g sample of impure potassium chloride was dissolved in water and treated with an excess ofsilver nitrate, 0.8402 g of silver chloride was precipitated. Calculate the percentage KCl in the original sample.
Answer:
97.78% KCl in the original sample
Explanation:
The % of KCl in the original sample would be as follows:
[tex]97.78[/tex]%
Given that,
Amount of sample of impure Potassium Chloride [tex]= 0.4500 g[/tex]
Amount of Silver Nitrate precipitated [tex]= 0.8402g[/tex]
Now,
Molarity of KCl = [tex]74.5 g/mol[/tex]
Minimum moles required for reaction [tex]= 0.0059 mol[/tex]
Final number of moles [tex]= 0.0059 mol[/tex]
So,
Concentration = Number of moles * Molarity
[tex]= 0.0059 mol * 0.74.5 g/mol\\= 0.440g[/tex]
Therefore,
% of KCl in the original Sample = Weight of Pure KCl/Weight of Impure KCl
[tex]= 0.440/0.450[/tex] × [tex]100[/tex]
[tex]= 97.78[/tex]%
Thus, [tex]97.78[/tex]% is the correct answer.
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Please help me It would mean everything!!
1. high
You are correct.
Cold region have more air pressure because air is denser.
6. Write the full symbol for an atom with 1 proton, 2 neutrons, and 0 electrons.
Answer:
The element hydrogen has the simplest atoms, each with just one proton and one electron. The proton forms the nucleus, while the electron orbits around it.
Explanation:
the diagram below shows three containers of gas.
Which list correctly describes the gases in containers R, S, and T?
a R= element s = compound t = mixture
b R= compound s = element T= mixture
cR= element s = mixture t= compound
d r = mixture s= emelem t = compound
ASAP
Answer:
d
Explanation:
The correctly describes the gases in containers R, S, and T is R = mixture S = element and T = compound. Hence option d is correct.
What are gases?Gases are defined as the state of matter where particles often travel very swiftly, far apart from one another, and with little or no attraction to one another. They take up much more space than the liquids or solids from which they are formed, are simple to compress, and expand to fill their containers.
Particles make up all matter; these particles can be single atoms or atoms that have been chemically combined to form molecules. This fact allows us to divide matter into three general categories: elements, compounds, and mixtures. All the atoms in an element are of the same kind. A compound is created when more than one kind of atom is chemically bonded.
Thus, the correctly describes the gases in containers R, S, and T is R = mixture S = element and T = compound. Hence option d is correct.
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Why are ocean currents important to coastal regions?
Answer:
Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region.
Explanation:
Ocean currents are important to coastal regions for a number of reasons.
What are the importance?Distribute heat. Ocean currents distribute heat around the globe, which helps to moderate the climate in coastal regions. For example, the Gulf Stream brings warm water from the Gulf of Mexico to the coasts of Europe, which helps to keep Europe's climate warmer than it would be otherwise.
Transport nutrients. Ocean currents transport nutrients from the ocean's depths to the surface, which supports marine life. For example, the California Current brings nutrients from the deep ocean to the surface, which supports a rich marine ecosystem off the coast of California.
Diversify marine life. Ocean currents help to diversify marine life by transporting different species to different parts of the ocean. For example, the Kuroshio Current brings warm water from the western Pacific Ocean to the eastern Pacific Ocean, which has helped to diversify the marine life in this region.
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secondary alcohol (X) reacts with PCL5 to give alkyl halide (Y) which on dehydrohalogenation yield an alkene(Z).The alkene upon ozonolysis gives the mixture of ethanal and methanal.Identify X ,Y ,Z
Answer:
X = 2-propanol
Y = 2-chloropropane
Z = propene
Explanation:
Secondary alcohol is an alcohol in which the carbon that the functional group (OH group) is attached to is also attached to two alkyl group. Examples are 2-propanol and 2-butanol.
The secondary alcohol referred to in the question here is 2-propanol and it reacts with PCl₅ as seen below
H₃C-CH-CH₃ + PCl₅ ⇒ H₃C-CH-CH₃ + HCl + POCl₃
| |
OH Cl
The alkylhalide produced there is 2-chloropropane. Thus, we can see that X is 2-propanol and Y is 2-chloropropane.
When this 2-chloropropane undergoes dehydrohalogenation (removal of hydrogen and halogen) an alkene is formed. The reaction is seen below
H₃C-CH-CH₃ (-HCl) ⇒ H₃C-CH=CH₂
|
Cl
The alkene produced (as seen above) is propene.
Confirmation: When propene undergoes ozonolysis, the compounds produced are ethanal and methanal as seen in the equation below
O
/ \
H₃C-CH=CH₂ + O₃ ⇒ H₃C - CH CH₂ [-O] ⇒ CH + CH₂
|| || || ||
O O O O
The final products as seen above are methanal and ethanal
What liquid is the most vicious ?
A) water
B) skim milk
C)salt water
D) pancake syrup
6th grade science i mark as brainliest
Record the mass of the object based on the reading from the triple-beam balance. The mass of the object is ____ grams.
Hello!
[tex]\large\boxed{167g}[/tex]
Looking at the balance, we see that:
The middle beam reads 100g.
The top beam reads 60g.
The bottom beam reads 7g.
Add all of the numbers together to get the total mass:
100 + 60 + 7 = 167g.
The mass of the object is 167 grams.
Explanation:
A triple beam balance is a mass measuring instrument used in labs to measure the mass of a substance. It unit in which it measures is grams. It consists of three beams which are: The middle beam has Increments of 100 grams The front beam has Increments from 0 grams to 10 grams The farther beam has Increments of 10 gramsGiven :
Readings of all the scales of three beams of the triple beam balance of an object.
To find :
The mass of object whose reading on triple beam balance is given.
Solution:
Middle beam reader at 100 grams
Front beam reader at 7 grams
Farther beam reader at 60 grams
The mass of object:
[tex]100 grams + 7 garms + 60 grams = 167 grams[/tex]
The mass of the object is 167 grams.
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im not sure for this one please help me
Answer:
Fairly certain it is the tension of the string
Answer:It would be C
1. How many times will a mole of paperclips (think giant paperclip chain) stretch around the equator of the
earth? (1 paperclip = 0.030 m, Earth's circumference = 4.00 x 10m)
Calculate the molecular mass of the following mass of the following chemical compound
C6H12O6
24 G/mol
180 gmol
155 g/mol
19 g/mol
Answer:
132g/mol
Explanation:
Given compound:
C₆H₁₂O₆
Molecular mass of the compound.
This is the sum of the atomic masses of the given elements in the compound;
C = 12
H = 12
O = 6
Molecular mass = 6(12) + 12(1) + 6(16) = 180g/mol
BRAINIEST IF ANSWERED which of the following is a molecule ( A.HCl B.HK C.MgCl2 D.Kl)
Answer: A.HCI
Explanation:
What types of atoms will experience radioactivity?
Answer:
Alpha particles, Beta particles, Gamma rays
Alpha Is the least harmful
Beta is second most harmful
Gamma is most dangerous
Explanation:
We breathe it out and it takes it in. Your next clue is where photosynthesis begins.
Answer:
Carbon Dioxide?
Explanation:
When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.
HELP PLEASE!!!!!!!!
(b) A atom T has atomic number 11 and mass number 23. How many (I) protons does it have?
Answer:
There are 11 protons in an atom T.
Explanation:
In chemistry, the scientific word for proton is also known as atomic number so the proton number will be 11.
Answer:
11
Explanation:
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Answer:
Gas, liquid, and plasma
Explanation:
Answer:
Liquid, Gas and Plasma
Explanation:
➨Think about it like this if you put a material made out of these and flipped it over which one would have the most effect of change in shape?
▶Liquid molecules slide past each other meaning they are not held in place.
▶Gas molecules are "excited" they bounce around everywhere meaning they are not held in place.
▶Plasma has no fixed shape or volume so it cant be held in place!
▶Solid molecules have a fixed shape so they cannot move on their own.
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How do i caculate speed
Answer:
Speed uses the same units as velocity, which is meters divided by seconds (m/s)(It doesn't need to be m/s, but it's the most common unit. It's basically any unit of length divided by any unit of time)
hope this helps and good luck
Answer/Explanation:
Speed is a force and is solved by using acceleration.
You can use the problem to solve for force:
F= MA or Force equals mass times acceleration.
Which of the following best describes a vacuum?
Hot
Cold
Shiny
Empty
Answer:
hot
Explanation:
Answer:
The Answer is (Empty)
If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is decreased to 20.0 mL?
Which equation should you use?
use B.
✔ 5000
kPa
Answer:
P₂ = 5000 KPa
Explanation:
Given data:
Initial volume = 2.00 L
Initial pressure = 50.0 KPa
Final volume = 20.0 mL (20/1000=0.02 L)
Final pressure = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
50.0 KPa × 2.00L = P₂ × 0.02 L
P₂ = 100 KPa. L/0.02 L
P₂ = 5000 KPa
What is the name of the group that contains potassium?
O Noble Gases
O Halogens
O Alkaline Earth Metals
O Alkali Metals
Transition Metals
Answer:
Alkali Metals
Explanation: