Answer:
212 degrees
Explanation:
Answer:
212 degrees Fahrenheit
Explanation:
Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor. Changes in the phase of matter are physical changes, not chemical changes.
copper sulphate solution turns the colour of litmus into red but litmus changes into blue with baking soda solution although both are salts. Give reason why?
Answer:
Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4
Litmus has a red colour in acidic solutions:
Conclusion: Acidic copper sulphate solution turns blue litmus to red
Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH
Litmus has a blue colour in basic solutions:
Conclusion: basic baking soda solution turns red litmus to blue
Which of the following statements BEST describes a mixture?
А
Carbon dioxide is an example of a heterogeneous mixture.
B
A compound and a mixture are the same type of substance.
Two elements that are in the area but not chemically combined can be a mixture.
D
A mixture is unable to be separated because the molecules have been chemically combined.
Answer: C) Two elements that are in the area but not chemically combined can be a mixture
==============================================================
Explanation:
An example of a mixture would be salt and water. The salt particles dissolve into the water but no chemical change has happened. I mean that no new chemical compound is made and also heat/energy is not given off. Furthermore, we can separate the two items (for instance through evaporation) and those two items retain their original properties. This helps show that the salt and water particles don't form a bond and we can separate those particles apart so to speak.
Another example of a mixture is iron and plastic. We can pull out the iron through using a strong magnet. Whether or not the iron is with the plastic, the iron retains its properties. The same can be said of the plastic. The two materials just happen to occupy the same space or volume or area.
If you have two chemicals react in some way to form a new chemical, then this is not a mixture. For instance if we combine vinegar and baking soda, it produces carbon dioxide and water. There isn't a process to undo this to get the vinegar and baking soda back (like there was a process to get the iron separated).
Calvin shines a thin beam of light onto a material, and the light refracts. Which diagram best shows what happens to the light?
og in
Answer:
In goes in fractures (looks like broken angle)
Explanation:
Answer:
Has a broken angle and there are three arrows
Explanation:
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q=The+diagram+below+represents+the+building+block+of+a+DNA+molecule+which+is+a+type&rlz=1CATPIA_enUS942&sxsrf=ALeKk02q0TrtMmY64OTcRfnI6UtHtyfVwg:1614616724451&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi2l7yCxI_vAhVjg-AKHXaSCVcQ_AUoAXoECBIQAw&biw=1517&bih=726#imgrc=YTAoiVTgM8UvnM
Answer:
we need to see the diagram
Explanation:
What name is given to this type of diagram
Answer:
There's no graph attached to the question
How do animal behaviors, such as hibernation or migration, enhance their survival?
Answer:
the reason a lot of animal ether hibernate is because they are escaping the cold or looking for food and the only reason we Humans don't hibernate is for two reasons. Firstly, our evolutionary ancestors were tropical animals with no history of hibernating: humans have only migrated into temperate and subarctic latitudes in the last hundred thousand years or so.
Explanation:
All generators need some source of energy to rotate the coil or magnets.
True or False
.energy mechanical needs it Answer:
Yes.
Explanation:
Balance the folowing equation.
S + 02
ws
SO:
Answer:
s+o2=so2
Explanation:
i hope it will help u
A light-year is a way to measure ______ in space.
O time
Odistance
PLS HELPPPPPPPPPPPPPPPPPPPPPPPPPLLLLLPL
Answer:
Distance
Explanation:
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year.
Answer:
distance pooh <3
Explanation:
A small amount of liquid bromine is added to a container which is then sealed.
Br2 (l) " Br2 (g)
Answer:
This answer is....
Br2 (l)
how many atoms are in 3.5 moles of arsenic atoms?
Answer:
1 mol of atoms = 6.022 ×1023 atoms. 3.5mol × 6.022 × 1023 atoms 1mol = 2.11 × 1024 atoms =.........
Explanation:
2160.64 atoms!
Select all the correct answers.
Why do the atoms in a piece of copper metal have no net charge?
1.The charges of the positive and negative copper ions cancel each other out.
2.The number of electrons surrounding each copper nucleus doesn’t change.
3.Copper atoms can’t lose electrons without a substance present to gain electrons.
4.When a copper atom loses electrons, it also loses a corresponding number of protons.
5.The copper atoms exchange neutrons instead of electrons.
Answer:
The correct answer is the charges of the positive and negative copper ions cancel each other out.
Explanation:
A copper metal having no net charge means that it is a neutral atom. A neutral atom means that total number of protons is equal to the total number of electrons.
How many grams of sand (SiO,) would need to be weighed out to equal 0.3 moles?
CO2
What is the type of bond
Which elements are;
a)solids,
b)liquids
c)gases
at 25°C
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Which of the following best describes the distribution of the world’s food supply? Select all that apply.
Still unevenly distributed leaving millions starving to death.
Quickly changing to be evenly distribute based on humanitarian efforts.
Slowly changing to be slightly more evenly distributed based on humanitarian efforts.
Evenly distributed throughout the population of the world now.
Answer:
Slowly changing to be slightly more evenly distributed based on humanitarian efforts. Still unevenly distributed leaving millions starving to death.
Explanation:
What are three facts about facilitated diffusion?
Answer:
you need my help come over
Explanation:
the particle that move around the nucleus is are
Answer:
electrons
The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge
Explanation:
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Carbon’s valence?Thanks for answer
Answer:
as in valence electrons? 5.
Answer:
Carbon has 4 Valence electrons
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CONVERT 65 GRAMS OF OXYGEN TO MOLES.
IM CONFUSED !
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4 moles
64 grams of oxygen contains 4 moles
Answer:
4 moles
64 grams of oxygen contains 4 moles
Explanation:
[H+] for a solution is 1 x 10^-7 M. This solution is _____________.
A. acidic
B. basic
C. neutral
Answer:
the answer is C neutral
Explanation:
if the ph is lower then 7 its acidic
if its higher then 7 its basic
and a ph of 7 is neutral
What chemicals must be cycled through a Martian environment in order for the planet to be habitable for life? Describe how scientists intend to make those resources available in such a harsh environment.
A brand of soda has one of the highest quantities of sugar among popular soda drink packing 52 grams into each 12 oz can how many molecules of sugar are in one can of this soda
Answer:
9.0 × 10²² molecules of sugar (sucrose)
Explanation:
Step 1: Given and required data
Mass of sugar in each can of soda (m): 52 gMolecular formula of sugar (sucrose): C₁₂H₂₂O₁₁Molar mass of sucrose (M): 342.3 g/molStep 2: Calculate the moles of sugar (n) in each can
We will use the following expression.
n = m/M = 52 g / (342.3 g/mol) = 0.15 mol
Step 3: Calculate the molecules corresponding to 0.15 moles of sugar
We will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
0.15 mol × 6.02 × 10²³ molecules/1 mol = 9.0 × 10²² molecules
The following equation represents what type of chemical reaction?
2Ag + H2S → Ag2S + H2
A. Double Replacement
B. Single Replacement
C. Decomposition
D. Synthesis
Answer:
single replacement
Explanation: N/A
If we start with 20 atoms of plutonium – 239, how many would remain after 48,240 years?
The amount of atoms of plutonium – 239 that would remain after 48240 years is 5 atoms
How to determine the number of half-lives Half-life (t½) = 24100 yearsTime (t) = 48240 yearsNumber of half-lives (n) =?n = t / t½
n = 48240 / 24100
n = 2
How to determine the amount remaining Original amount (N₀) = 20 atomsNumber of half-lives (n) = 2Amount remaining (N) = ?N = N₀ / 2ⁿ
N = 20 / 2²
N = 20 / 4
N = 5 atoms
Learn more about half life:
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Please please please someone give me the answers to all of these our teacher is very bad at explaining things and we are all confused i really need the answers please
Answer: #1 2Al + 2S - Al2S2
Explanation: You have to make sure there are 2 of each on each side
butane reacts with chlorine to form two isomers of chlorobutane. What type of reaction is this?
Which of the following DOES NOT belong to the group?
A.eyes
B.mouth
C.large intestine
D.stomach
Answer:
eyes
Explanation:
It is because the mouth, large intestine and stomach comes in the digestive system abd eyes doesn't.
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Answer:
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