Answer:
Plastic is an insulator
Explanation:
This enables you to touch it without burning yourself because it does not conduct heat easily.
ughh please help me
Answer:
Substance 2
Explanation:
The stronger the intermolecular forces are, the more energy is required, so the higher the melting point is.
Answer:
Substance 2
Explanation:
I know this because substances with a stronger molecular attraction are less susceptible to melting quicker than substances who have a weaker attraction with each particle. Therefore, substance 2, which melted after substance 1, has a stronger molecular attraction then substance 1.
(copy and paste above if you want)
How can we separate a homogenous mixture (a solution)? For example, how can we separate salt that has been dissolved in water?
Answer:
Well, to separate salt from water, you would stir the two together to create a homogenous mixture. Then you would boil the mixture; all the water would evaporate, leaving behind the salt
Explanation:
PLEASE HELP ASAP WILL GIVE Brainlist
Answer:
3 5 5 3
Explanation:
Not 100% sure on this question
The amount of matter in a given amount of volume is referred to as
A. Weight
B. Mass
C. Density
D. Volume^2
Answer:
It would be Density because:
Density= mass/ volume
Density refers to the amount of matter or mass of a substance over a volume
How much Ag can be produced if one is given 64 g of Ag2O?
mass Ag = 59.5 g
Further explanationGiven
64 g of Ag2O
Required
Mass of Ag
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements
mass of Ag in Ag2O :
= ((2 x Ar Ag)/molar mass Ag2O )x mass Ag2O
[tex]\tt mass~Ag=\dfrac{2.Ar~Ag}{MW~Ag_2O}\times mass~Ag_2O[/tex]
Ar Ag : 107,8682 g/mol
MW Ag₂O = 231,735 g/mol
Input the value :
mass Ag = ( (2 x 107,8682 g/mol )/ 231.735) x 64 g
mass Ag = 59.5 g
Or we can use reaction
2Ag₂O ⇒ 4Ag + O₂
mol Ag₂O :
= 64 : 231.735
= 0.276
mol Ag :
= 4/2 x moles Ag₂O
= 4/2 x 0.276
= 0.552
mass Ag :
= 0.552 x 107,8682 g/mol
= 59.54 g
Which of the following is a strong acid?
Answer:
C. HCl
Explanation:
HCl is a strong acid because it dissociates almost completely.
During the summer months, glaciers at the poles melt, delivering fresh water to the ocean. What does this do to salinity? (giving 17 points for this one)
Question 3 options:
lowers salinity
it does not change the salinity
raises salinity
Answer:
lowers salinity
Explanation: I did the quiz on k-12 hope this helps good luck
In an ecosystem with glaciers its melting lowers salinity of the ocean ,delivering fresh water to the ocean.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
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Answer answer answer answer answer answer answer
Answer:
if she did it immediately and then weighed it all it would b
Explanation:
Answer:
The answer is B
I saw this question in class today
Explanation:
Balance the following Equation:
___Zn + ___HCl --> ___ZnCl2 + ___H2
50g of zinc are reacted with 50g of hydrogen chloride. What is the limiting reactant?
Group of answer choices
HCl
ZnCl2
Zn
H2
Answer:
HCl
Explanation:
Given data:
Mass of Zn = 50 g
Mass of HCl = 50 g
Limiting reactant = ?
Solution:
Chemical equation:
Zn + 2HCl → ZnCl₂ + H₂
Number of moles of Zn:
Number of moles = mass / molar mass
Number of moles = 50 g/ 65.38 g/mol
Number of moles = 0.76 mol
Number of moles of HCl:
Number of moles = mass / molar mass
Number of moles = 50 g/ 36.5 g/mol
Number of moles = 1.4 mol
Now we will compare the moles of Reactant with product.
Zn : ZnCl₂
1 : 1
0.76 : 0.76
Zn : H₂
1 : 1
0.76 : 0.76
HCl : ZnCl₂
2 : 1
1.4 : 1/2×1.4 = 0.7
HCl : H₂
2 : 1
1.4 : 1/2×1.4 = 0.7
Less number of moles of product are formed by HCl it will act limiting reactant.
what kinds of things could a magnet make another object or magnet do without touching it?
Answer:
Magnets can be used to make other magnets and things made of iron move without being touched. Something that has been electrically charged can make other things move without touching them.
Explanation:
(can someone help me with my question?)
Which of the following chemical reactions is balanced?
Answer:
a
Explanation:
The sum of 4.824 + 2.03 + 4.72319 + 123.4567 + 111.1 expressed to the
proper number of significant figures is
Answer:
246.13389
Explanation:
Simplify the expression.
How many moles are in 9.63 x 10^22 atoms of Ar?
Answer:
0.16 moles of Ar
Explanation:
One mole is equal to 6.022×10^23 atoms
9.63 x 10^22 atoms * 1 mol/6.022×10^23 atoms = 0.15991364995 moles
I WILL GIVE YOU BRAINLY PLSS!!! :(
Budding is a form of ______________ reproduction in which a new ______________
develops from a bud or outgrowth due to _________ division. The new organism remains
attached as it grows, separating from the ___________________ only when it is mature.
3. Vegetative reproduction is a form of _____________ reproduction in ___________ .
It is a process by which new organisms are produced without _______________ or
_______________ . It can occur naturally or be induced by ______________________ .
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Which statement best explains how the gases of the atmosphere affect the temperature of Earth?
A
The gases reflect all of the heat from the Sun, preventing it from reaching Earth's surface.
B
The gases absorb all of the heat from Earth's surface, preventing it from radiating into space.
С
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface.
D
The gases reflect some of the heat from Earth's surface, holding it away from the surface in space.
Answer: The answer is c
Explanation:
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
What is atmosphere?Atmosphere is defined as a layer of gas that surrounds a planet and is kept there by the gravitational pull of the planetary body. The atmosphere of the earth shields its people by absorbing dangerous sun rays and preserving a constant temperature. It protects Earth from many space hazards and enables life there. As a result, it is crucial for regulating climate and a source of life on planet.
The majority of the infrared energy from the Sun is absorbed and re-emitted in all directions by greenhouse gas molecules and clouds, creating the greenhouse effect. This causes the lower atmosphere and the Earth's surface to warm.
Thus, the gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
To learn more about atmosphere, refer to the link below:
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HELP PLEASEEEEEEEE HELPPPPPPP (IMAGE)
Question 1 options:
solid
liquid
gas
Question 2 options:
solid
liquid
gas
Question 3 options:
solid
liquid
gas
Which list of features describes an economy based on free enterprise?
government control of trade, laws that favor business, labor guilds
government ownership of factories, law that favor workers, limited trade with other countries
no government intervention, law of supply and demand, open trade with other countries
some government intervention, minimum wage laws, price setting
Answer:
no government intervention, law of supply and demand, open trade with other countries
Explanation:
A free enterprise system is an economy that is free from any type of government intervention.
Also, I took the quiz :)
The sample is made up of neutral atoms. Using the information in the diagram shown, determine the number of protons, neutrons, and electrons found in each atom of your sample
Explanation:
Atoms are generally made up of three fundamental particles which are the protons, neutrons and electrons.
Protons are the positively charged particles within an atom.
Electrons carry negative charges.
Neutrons do not carry any charges.
When an atom is neutral, the number of protons and electrons within the atom is the same.
A charged atom will have a difference in the number of protons and electrons they contain.
help pleaseeeeeeee eee
bee (b)
give brainliest now or u will never get brainliest :)))))) jkjkjkjkjkjkk
why was the turtle shy at the party?
Answer:
Because he likes someone named shelly?
Solutions of a halogen and a sodium halide are mixed which mixture darkens in colour because a reaction occurs
Answer:
Chlorine and sodium iodide. (see options attached)
Explanation:
Options:
(A) bromine and sodium chloride (B) bromine and sodium fluoride (C) chlorine and sodium fluoride (D) chlorine and sodium iodide
In the reactivity series, chlorine would displace all the other halogens down the group. The order goes:
The order of reactivity is chlorine > bromine > iodine.
Of all the halogens, iodine is the darkest in colour. Hence, the most likely mixture to give off dark coloration after displacement reaction would be that of chlorine and sodium iodide.
I hope this explanation was easy to understand.
what kind of oxide is formed when a piece of sodium is dropped in the water
Answer:
Sodium oxide is the product
Explanation:
4Na+O2->2Na2O
A covalent compound contains 2 atoms of nitrogen and 4 atoms of oxygen. What is the percent by mass
composition of nitrogen?
(I’ll mark you as brainlister)
The percent by mass composition of nitrogen:
Given information :Nitrogen- 2 atomsOxygen-4 atomsMass of oxygen-16Mass of nitrogen -14Solution :
Total mass = Nitrogen + Oxygen
Total mass= 2*14+4*16Total mass= 92Percent mass composition of nitrogen =mass of nitrogen*2/ total mass*100
Percent mass composition of nitrogen=28/92*100Percent mass composition of nitrogen=30*.4The percent by mass composition of nitrogen is 30.4.
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which of the following uses mechanical energy to function?
A. computer
B. battery
C. microwave oven
D. windmill
Do you know this Ca(NO2)2 ? It's not calcium nitrate
Answer:
The answer is, in fact, Calcium Nitrate. I even looked it up to make sure, and according to PubChem, it is Calcium Nitrate. I suggest asking your teacher what this question is trying to ask because if it says it is not Calcium Nitrate, someone got it wrong.
Explanation:
The only other name I can think of, though, is Calcium Dinitrite.
Which salt(s) has an exothermic enthalpy of solution? Check all that apply.
Answer: it’s the bottom 2
Explanation: I just took the test and was able to see the answer. :)
Answer:
Chemistry makes no sense. See below for answer.
Explanation:
Which of these is an example of genetic variation?
A. Two lizards are fighting and one loses its tail.
B. Bacteria reproduce asexually and produce two clones.
C. Two sisters are born with brown hair and one dyes their hair blonde.
D. In butterflies, some are born with more dark colored spots than others.
Answer:
D. in butterflies, some are born with more dark colored spots than others.
Explanation:
hope this helps my friend
based on the balanced equation: 2 K + Cl2 --> 2KCl what is the mole ratio of K to KCl
Answer:
2 : 2
Explanation:
The balanced chemical equation is given as:
2K + Cl₂ → 2KCl
From the balanced reaction equation, we can conclude that;
2 moles of K will react with 1 mole of Cl₂ 2 moles of K will produce 2 moles of KCl 1 mole of Cl₂ will produce 2 moles of KClTherefore, the mole ratio is 2:2 or 1:1 in the simplest form.
Headphones take in sound waves. This is an example of ...
A)reflection
B)absorption
C)transmission
D)refraction
Complete the Lewis structures for diazine (C5H4N2) showing the two most common resonance forms. Draw the Lewis structures with the formal charges minimized.
Answer:
See explanation and image attached
Explanation:
Lewis structures dot structures that show the number of valence electron in a molecule. Sometimes, we show bonded electrons using a single line as in the image attached.
Two images are shown. They are the both resonance structures of diazene. The both structures only differ in the arrangement of electrons as we can see from the image.