Answer:
PLEASE MARK AS BRAINLIEST!!
Explanation:
Apply rubbing alcohol, hairspray, or hand sanitizer to dilute the stain, making it easier to remove during the wash. These solvents help tackle most types of ink stains, but remember to test the stained garment for colorfastness first, as they can also attack fabric dyes and cause further damage.
The following compounds will
decompose on heating except
A Ag2CO3.
B. CaCO3.
C. K2CO3
D. PbCO.
E. ZnCO3
AnsThe option C is correct
Divergent tectonic plate boundaries most commonly form one: A non-volcanic islands. B ocean trenches C continental mountains D ocean ridges
Answer:
D. ocean ridges
Explanation:
Answer:
I think A
Explanation:
Most volcanoes form at the boundaries of Earth's tectonic plates. ... The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries
Is 2CO + O2 -> 2CO2 A balanced or unbalanced equation
Answer:
It is balanced.
Explanation:
You have the same amount of atoms on both sides. 2 carbon and 4 oxygen.
Choose all the answers that apply.
Argon (Ar) is in group 18. Argon _____.
forms a salt when combined with a metal
has 18 electron shells
has properties similar to other elements in group 18
does not react readily with other elements
is part of the noble gas group
!(more than one answer)!
Answer: has properties similar to other elements in group 18, does not react readily with other elements, is part of the noble gas group
Explanation: I’ve done on edg before
How is a doorbell an example of an electrical transformation
23. Soluble salts can be prepared using
the following methods except by
A. action of dilute acids on
metals.
B. action of dilute acid on an
insoluble base.
C. direct combination of
constituent elements.
D. neutralization reactions.
E. precipitation from solutions,
help ple*zzzz*zzz*
Answer:
I think crystallization is a write answer for this question
Explanation:
but according to this (E is the write answer)
HELPPPPPPPPPP:-( :-( :-( :-(
DETERMINE THE MASS NUMBER OF EACH OF THE ISOTOPES OF LITHIUM
Answer:
6u and 7u
Explanation:
no of neutrons in 1= 3
no of protons in 1=3
mass=3+3=6
same method applies to the 2nd one
Complete the chart below for a patient that has diabetes. Use the words
Low, Normal, High, and None.
Body Part and System
Test Results
Mouth (digestive system)
Starch:
Oxygen:
Glucose:
Small intestine (digestive system)starch:
Oxygen
Glucose:
Lungs (respiratory system)
Starch:
Oxygen:
Glucose:
Cells
Starch:
Oxygen:
Glucose:
Answer:
It picked out for the best time for man to the earth for the earth and the earth in the moon to moon earth earth moon earth and moon earth moon and moon earth lord earth moon earth lord moon earth moon and earth moon earth lord lord moon earth moon lord moon earth lord moon lord
Explanation:
In a living cell which process uses up atp
Answer:
Metabolism
Explanation:
because energy change takes place
SOLVE THIS ASAP!!!!!!!!!
and yes iknow this is not chem don't come at me u_u
What is the life cycle of an average sized star?
Answer:
The Middle Years
Explanation:
Depending on the size of the star, the period of which thermal energy is created through the process of nuclear fusion can vary. However, for the life cycle of an average star, this can be roughly a few billion to 10 or even 15 billion years
Nuclear fusion reactions release more energy than fission reactions while also generating less waste. However, nuclear fusion reactors are not currently used to generate electricity.
What is the main reason for this?
Nuclear fusion reactions release high energy and required tremendous temperature of nuclear reactors is the main reason for not used to generate electricity.
What are nuclear reactions?Nuclear reactions are those reactions which are taking place in the nucleus of any unstable atom and produces energy.
As in the question it is given that nuclear fusion reactions releases more energy and less wastage, but this energy are releases in the tremendous amount which can be proved harmful for the environment and the humans. To carry out this reaction we have to maintain the very high temperature of nuclear reactors of about 6 times greater than sun's temperature, which is not possible manually.
Hence, high temperature of nuclear reactors and high amount of energy released is the main reason.
To know more about nuclear reactions, visit the below link:
https://brainly.com/question/984564
Which of the following is the correct word equation for the reaction described below?
Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water.
calcium hydride + hydrogen → calcium hydroxide + water
calcium hydride + water → calcium hydroxide + hydrogen
calcium hydroxide + hydrogen → calcium hydride + water
calcium hydroxide + water → calcium hydride + hydrogen
Explanation:
calcium hydride + water → calcium hydroxide + hydrogen
hope it helps!
Answer:
B
Explanation:
got it right on edg
Where are chlorofluorocarbons (CFCs) found? Why were they banned?
Answer:
A gaping hole in the ozone layer over Antarctica was discovered in the mid 1980s. The international community agreed the Montreal Protocol in 1987, which banned most of the offending chemicals.
Hope this helps..According to Le Chatelier's principle, what happens to the equilibrium constant (K) when the concentration of the reactants is doubled? The value of the equilibrium constant (K) is doubled. The value of the equilibrium constant (K) is halved. The value of the equilibrium constant (K) remains the same. The value of the equilibrium constant (K) changes unpredictably.
Answer:
The value of the equilibrium constant (K) remains the same.
Explanation:
A state of dynamic equilibrium is said to have been achieved in a reaction system when the rate of forward reaction equals the rate of reverse reaction.
At equilibrium, doubling the initial concentration of reactants have no effect on the equilibrium constant K. The equilibrium will rather shift to the left or right as required in order to annul the constraint.
Answer:
C
Explanation:
What is the coordination number for Potassium Nitrate?
Answer:
The coordination number is 8
Potassium nitrate has an octahedral coordination structure
Which of the following methods can be used to completely separate a solution containing alcohol and water?
A) Evaporation and distillation
B) Filtration
C)Floatation or centrifuge
D) Magnetism
20 POINTS PLEASE HURRY At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.
How many neutrons does this atom have?
4
6
10
14
Answer:
6
Explanation:
because newtrons dont have a charge so the red ones in the middle count those and you get 6
Answer:
The answer is 6
Explanation:
A pharmacist mixed some 10%-saline solution with some 15%-saline solution obtain 100 mL of a 12%-saline solution. How much of the 10-saline solution did the pharmacist use in the mixture
Answer:
10%-saline solution = 60mL
15%-saline solution = 40mL
Explanation:
Let
10%-saline solution = x
15%-saline solution = y
x + y = 100
0.1x + 0.15y = 100*0.12
x + y = 100 (1)
0.1x + 0.15y = 12 (2)
from (1)
x = 100 - y
Substitute x = 100 - y into
0.1x + 0.15y = 12
0.1(100 - y) + 0.15y = 12
10 - 0.1y + 0.15y = 12
- 0.1y + 0.15y = 12 - 10
0.05y = 2
y = 2 / 0.05
y = 40mL
Substitute y = 40 into
x + y = 100
x + 40 = 100
x = 100 - 40
x = 60mL
10%-saline solution = 60mL
15%-saline solution = 40mL
Which element in Group 18 of the Periodic Table has the highest lonization energy?
all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness
what did bohr consider electrons as?
A. Discrete particles
B. Continuous particles
C. Particles with zero energy
D. None of the above
Answer:
D?
Explanation:
I think D hmm is the answer if I am wrong pls anyone or someone type the right answer but for me is d
Answer:
NOT D!!!!
Explanation:
I am taking the quiz on ck12, it is NOT "none of the above"
Why reaction between phosphorus and oxygen produces four atoms of phosphorus and five atoms of oxygen
Answer:
Reaction between an oxygen and a phosphorus will produce oxides of phosphorus.
Explanation:
Reaction between oxygen and phosphorus produces four atoms of phosphorus with five atoms of oxygen. Sometimes it produces two atoms of phosphorus and five atoms of oxygen and sometimes four atoms of phosphorus and six atoms of oxygen. It does so depending upon the availability of oxygen. The size of phosphorus atom interferes with the ability to form a double bonds to the other elements, such as nitrogen, oxygen, etc.
What are the two ways ocean acidification affects marine life?
Answer:
1) harm life forms that rely on carbonate-based shells and skeletons, 2) harm organisms sensitive to acidity
Explanation:
Answer:
Ocean acidification can negatively affect marine life, causing organisms' shells and skeletons made from calcium carbonate to dissolve.
Explanation:the more acidic the ocean, the faster the shells dissolve.
It takes 7.21 1019 J of energy to remove an electron from an iron atom. What is the maximum wavelength of light that can do this
Answer:
2.75 × 10^-45 m
Explanation:
From;
E= hc/wavelength
h= Plank's constant= 6.6 × 10^-34 Js
c= speed of light=3× 10^8 ms-1
Wavelength = 6.6 × 10^-34 × 3× 10^8/7.21 × 10^19
Wavelength= 2.75 × 10^-45 m
The Earth's _____ provides protection from meteorite impacts by causing them to _____.
please leave a simple answer
Answer:
atmosphere, break up
Explanation:
Answer:
Atmosphere, break up
Explanation:
Why do commercial airliners encounter very little turbulence above 25,000 feet?
Group of answer choices
There are no clouds above 25,000 feet.
Water vapor has mostly disappeared at colder elevations and its effect on weather turbulence.
The air is so thin at altitudes above 25,000 feet that turbulence has much less effect.
The jet stream produces a much smoother flow of air.
Answer:
Water vapor has mostly disappeared at colder elevations and its effect on weather turbulence.
Explanation:
Answer:
B. Water vapor and its effect on weather turbulence has mostly disappeared at colder elevations.
Explanation:
Hope this helps
7. Some products or processes claim to be "chemical free" or say "no chemicals added." Based on your understanding of chemistry, what are the arguments for and against such statements?
Please i need help
The meaning behind the statement is that the products does not contains any synthetic and harmful chemicals such as colourants, preservatives etc.
What are synthetic chemicals?All natural products or materials contains certain kind of chemicals which are naturally made in them. Such chemicals are natural chemicals and does not harm the living or causes any unwanted reaction.
The chemicals which are made by humans for specific purposes are called synthetic chemicals. Which can be of toxic and hazardous. Almost all materials we use everyday such as toothpastes, shampoo, food items, dyes, medicines and the fertilizers and pesticides we use in agriculture are all chemicals.
These chemicals helps in some way but they can be harmful to life in other way. Some products claim that they are chemical free, may true or not they intending to clear that the product does not contain any synthetic chemical except the required natural chemicals.
To find more about synthetic chemicals, refer the link below:
https://brainly.com/question/19938248
#SPJ2
An 80 gram sample of a radioisotopes decayed to 40 grams in 3 days how many grams of the original sample would remain after 9 days
Answer: 10 grams
Explanation: Original sample is 80 gram and every three days half of its composition decays so 80 down to 40 in the first 3 days, 20 in the next three days, and 10 in the last three days
List all the layers of the atmosphere and give one SENTENCE description or characteristic for each layers.
Answer:
Troposphere, stratosphere, mesosphere, and thermosphere.
Explanation:
Troposphere - It is the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.
Stratosphere - It is the layer of the earth's atmosphere above the troposphere, extending to about 32 miles (50 km) above the earth's surface (the lower boundary of the mesosphere).
Mesosphere - It is the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
Thermosphere - It is the region of the atmosphere above the mesosphere and below the height at which the atmosphere ceases to have the properties of a continuous medium. The thermosphere is characterized throughout by an increase in temperature with height.
Answer:
The First layer is the troposphere. The troposphere is what we live in. It creates weather for us. Second layer is the Stratosphere. You will find the ozone layer in it. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Third layer is Mesosphere. The Mesosphere is very important for earth's protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. Fourth layer is Thermosphere. The Thermosphere absorbs the sun radiation making it very hot.
Explanation:: I don't know if you include this one but the fifth layer is the Exosphere. Although the exosphere is the most distance layer of earth's atmosphere it is the layer that is the planet's first line of defense against the sun's rays. It is also the first layer to come into contact and protect the earth from meteors, asteroids, and cosmic rays.
why Sodium and phosphorus are in the same period, but they have different atomic radii?
Answer:
Because sodium is on the left side of the PT and phosporus is on the right side. And atomis radius decreases from left to right.
Explanation: