Answer:
We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.
Explanation:
have a good day
help help help please!!
Answer:
The correct answer is D hydrogen and chlorine need to be balanced there's an equal amount of magnesium on each side. I just took the test and got the correct answer.
Explanation:
2. What is the density of an object with a mass of 400 g and a volume of 112 mL?
[tex]\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}[/tex]
[tex]\\ \sf\longmapsto Density=\dfrac{400}{112}[/tex]
[tex]\\ \sf\longmapsto Density=3.57g/mL[/tex]
How many grams of CO2 are produced from 18.6 g of oxygen gas?
Answer:
C + O2 ⇒ CO2
mole of O2: 18.6/32=0.58125= mole of CO2
⇒ gram of CO2: 0.58125*(12+32)=25.575
Explanation:
25.9cm^3 divided by 6.32 g/cm^3
Answer:
clock it'll luck is be FL KS Fb it to KS go out to if go off to kg HR to kg to if he do well all
Answer:
This is the answer.
Explanation:
Do you think more foam will form if the ice cream is added to the glass before the root beer or after the root beer? Explain.
Answer:This is a very interesting question. I think of it like this. You have a piece off ice floating in the water. Let's say a portion off. It is submerged. No. If this the portion off the sub marched portion has a volume be, it means that the buoyant force will be times the density off water times G. Now this will be equal to the point force, which is equal to the weight off the ice block. Now, once I this ice turns into water, it will still have the same rate. But now its density will be equal to that of water. So it's wait will be saying mass times G. Now you can cancel T on mass is equal to three times rope. Now, this week is this volume and if you notice, row is also the density of water, which means this mass of water contains will help this volume. It means once the ice becomes water, it perfectly fits into this volume, which means the water level's stays exactly the same. It's almost magical, but what happens if there isn't a butt in a bubble? You can think off it in a slightly mathematical way, If you have an air bubble in on Ice Cube, it's total density. Its average density will be less than the density off ice, but an easier way to think about it is like this. You have a piece off ice, which has in a bubble in it on dhe, obviously that it's water here and now. Once the ice melt, the amount of water displaced will be. The volume of the water displaced will equal the weight off the ice. So the what? The water in the ice, if it's exactly in this volume, so it must still be the same. But the answer will be different if you have a great off sandal. If you have a grain of sand, let's say somewhere over here the total density off the ice cube will be larger. The average density on once the ice melt the sand simply false down, which means this ice this piece off ice was further down than it for the lower in the water than it would have been if it was simply made off ice. So to make up for that, when the ice melts, the amount off the volume off the water will be less than the amount of water displaced, so the level of water will decrease if it were if there were a grain of sand in the ice, so you would expect that the water level would tries if, uh, in the case off the air bubble. But it's the identity of baby. It is so small that it simply doesn't count.
Explanation:
why copper and chromium having Anamalous electronic configuration?
Answer:There are two main exceptions to electron configuration: chromium and copper. See below
Explanation:
These two elements are exceptions because it is easier for them to remove a 4s electron and bring it to the 3d subshell, which will give them a half filled or completely filled subshell, creating more stability.
Perform the following calculation and report the answer with the correct number of significant figures.
4.40 X 8.0 =
Answer:
4.40 X 8.0 =35.2
Explanation:
multiply it
The greater your capacity to love, the greater your capacity to feel the pain.
Answer:
that's true
Explanation:
Draw an energy diagram showing the process involved in the production of an absorption spectrum. Use this diagram to help you construct a step-by-step written description of what is happening at the atomic level. Make sure to label the axis, energy levels, and cause of the electron transition.
At the atomic level, electrons absorb a particular wavelength of energy and move from a lower to a higher energy level.
In the absorption spectrum, energy is absorbed causing a specie to move from a lower to a higher energy level. This is shown in the diagram attached to this answer.
At the atomic level, electrons absorb a particular wavelength of energy and move from a lower to a higher energy level.
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BWrite true or false.
1) Digestion of starch starts in the stomach.
2) Temperature is measured in centimeter.
3) Tooth decay is caused by the presence of base.
4) Formation of manure from leaves is a physical change.
5) Air moves from the region of low pressure to region of high pressure.
Answer:
1). True
2).True
3).false
4).true
5).true
Answer:
FalseFalseFalseFalseFalseThe worldwide record of earthquake activity indicates that _____.
a. the frequency of activity is stable (constant)
b. the frequency of activity is diminishing
c. the frequency of activity is slowly increasing
d. the frequency of activity is increasing rapidly
Answer:
My answer is d. hope this'll help
What is made when certain wavelengths of light, or colors, are given off by hot gases and can be thought of like a fingerprint for elements?
constellations
nebulae
supernovas
emission lines
The emission lines of an element is characteristics of the element and can be thought of like a fingerprint for elements. Emission spectra is used to identify the elements.
What is emission spectrum ?The electromagnetic radiation spectrum produced when an electron changes from a high energy state to a lower energy state is known as the emission spectrum of a chemical element or chemical compound.
The energy difference between the two states is equal to the photon energy of the emitted photon. Each atom contains a large number of potential electron transitions, and each transition has a distinct energy difference.
An emission spectrum is made up of a variety of transitions that result in various radiated wavelengths. The emission spectra of each element is distinct. Therefore, option d is correct.
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1. Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)(1 point)
A) O=C–O
B) O=C=O
C) C=O–O
D) C–O–O
2. Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?(1 point)
A) Yes, there is because they form a long chain in order to all have stable outer energy shells.
B) Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.
C) No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
D) No, there is not because it would form H2 instead of methane if hydrogen-bonded with itself.
3. In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?(1 point)
A) H–O–O–H
B) O–H–O–H
C) H–O–H–O
D) O–H–H–O
From the fact that oxygen is in group 16 and carbon is in group 14, the structure of CO2 must be O=C=O. In methane, there is no bond between any of the hydrogen atoms. The structure of H2O2 is H–O–O–H.
Carbon is in group 14 hence it has four valence electrons and oxygen is in group 16 hence it has six valence electrons. This implies that each oxygen atom will share four electrons with carbon in a covalent bond to form the structure O=C=O.
In CH4, we know that carbon is tetravalent so it forms for bonds. Therefore, there is no bond between hydrogen atoms so it bonds with each hydrogen atom; hydrogen only forms one bond.
In H2O2, there is the peroxide ion that has the structure O-O. Hence, the correct structure of H2O2 is H–O–O–H.
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50 Points Help Me ASAP
change the following to the appropriate unit
1. 9.63 x 10–2 m ==> nm
2. 6.02 x 103 ks ==> s
3. 8.9 x 108 microgram ==> centigram
4. 4.12 x 10–4 Mg ==> g
5. 7.33 x 10 -2 TL ==> dL
6. 0.73 kL => L
7. 5.93 cm3 => m3
8. 498.82 cg => mg
[tex]\\ \sf\longmapsto 9.63\times 10^{-2}m=9.63\times 10^{-2}\times 10^{-9}m=0.0963\times 10^{-9}m=0.0963nm[/tex]
[tex]\\ \sf\longmapsto 6.02\times 10^3ks=6.03\times 10^6s[/tex]
[tex]\\ \sf\longmapsto 8.9\times 10^8\mu g=8.9\times 10^4cg[/tex]
[tex]\\ \sf\longmapsto 4.12\times 10^{-4}Mg=4.12\times 10^{-1}g=0.412g[/tex]
[tex]\\ \sf\longmapsto 7.33\times 10^{-2}Tl=7.33\times 10dL=73.3dL[/tex]
[tex]\\ \sf\longmapsto 0.73kL=0.73(1000)L=730L[/tex]
[tex]\\ \sf\longmapsto 5.93cm^3=0.00000593m^3[/tex]
[tex]⇒9.63 \times {10}^{ - 2} m = 9.63 \times {10}^{ - 2} \times {10}^{9} = 9.63 \times {10}^{ 7} nm \\ [/tex]
[tex]⇒6.02 \times {10}^{3} ks = 6.02 \times {10}^{3} \times {10}^{3} = 6.02 \times {10}^{6} s \\ [/tex]
[tex]⇒8.9 \times {10}^{8} \mu g = 8.9 \times {10}^{8} \times {10}^{ - 4} = 8.9 \times {10}^{4}cg \\ [/tex]
[tex]⇒4.12 \times {10}^{ - 4} mg = 4.12 \times {10}^{ - 4} \times {10}^{3} = 4.12 \times {10}^{ - 1}g \\ [/tex]
[tex]⇒7.33 \times {10}^{ - 2} TL = 7.33 \times {10}^{ - 2} \times {10}^{13} = 7.33 \times {10}^{ 11} dL\\ [/tex]
[tex]⇒0.73kL = 0.73 \times {10}^{3} = 730L[/tex]
[tex]⇒5.93cm {}^{3} = 5.93 \times 10 {}^{6} = 5.93 \times 10 {}^{6}m {}^{3} \\ [/tex]
[tex]⇒498.82cg = 498.82 \: \times 10 = 4988.2 \: cg \\ [/tex]
How many mass would be contained in 0.01mol of NaOH
Answer:
Explanation:
1mol NaOH---->40
0.01mol NaOH------>x
X=40×0.01=0.4
Beautiful vases, figurines, and plate are some of the households which are useful. These objects are produced from a special kind of mixture. What kind of mixture do they possess?
Solution
Suspension
Colloid
Particles
Beautiful vases, figurines, and plate are a kind of mixture called colloid.
A colloid comprises of the dispersion of one substance in another. Therefore in a colloid there must be;
The dispersed substanceThe dispersing mediumThese beautiful vases, figurines, and plate are made of ceramics. In ceramics, composite materials and fibers are dispersed in a polymer matrix. Hence these beautiful vases, figurines, and plate are made of colloids.
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What is the name of this compound?
Answer:
hexagon
Explanation:
Answer:
um how is this a question? is there no info on how many protons neutrons electrons and what elements are in the compound. how do you find out a compound if you don't know what the elements in it are
Several septic systems from a
rural area are leaking into the
surrounding waterways. This is
considered as?
Answer:
contamination
Explanation:
What's the mass shown?
Answer:
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same.
Explanation:
Zinc nitrate can be produced by reacting an acid and a metal oxide.
Name the acid and the metal oxide used to produce zinc nitrate.
Answer:
The acid is Nitric Acid and the metal zinc
Explanation:
would the [H+] for the 1.0M HNO3 be greater than , less than, or equal to 1.0M
Answer:
Equal
Explanation:
Nitric Acid is a strong acid and therefore completely disassociates.
Any five uses of solution.....
Household cleaners like bleach are solutions, they help us to make our houses clean. Beverages such as fizzy drinks, mineral water and tea are solutions. 3.. In hydroponics, the roots of plants are immersed in solutions containing dissolved mineral salts
Explain the difference between accuracy and precision.
Answer:
Accuracy is the degree of closeness to true value.
Precision is the degree to which an instrument or process will repeat the same value.
Hope it helps....
Answer:
Accuracy and precision are alike only in the fact that they both refer to the quality of measurement, but they are very different indicators of measurement. Accuracy is the degree of closeness to true value. Precision is the degree to which an instrument or process will repeat the same value
Unit 2 Atomic Theory. Please help will give as much points as possible.
#1
Subtract no of electrons from no of protons
A=8-10=-2B=9-10=-1C=11-10=+1D=12-10=+2Ion A has -2 charge
#2
Carbon has a atomic mass=12uNo of protons=6
No of electrons=6
Answer is GCavendish bananas are a popular species among banana growers because there predictable . All these bananas are grown to have the exact same genetic structure. How's this possible? A.. The grow in the same ecosystem . B They are clones of the parent plant . C They got equal amounts of nutrients.D They grow only one time of the year. E They form from sexual reproduction
Answer:
B. They are clones of the parent plant
Explanation:
Question
Arrange the elements according to atomic radius.
Largest radius to Smallest radius
Answer Bank
K
Ca
Ga
Ge
As
Sc
Br
Kr
The elements according to the decreasing atomic radius are arranged as-
K, Ca, Sc, Ga, Ge, As, Br, Kr
An atomic radius is half the distance between adjacent atoms of the same element in a molecule. It is a measure of the size of the element’s atoms, which is typically the mean distance from the nucleus centre to the boundary of its surrounding shells of the electrons.
An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements. The atomic radius decreases on moving from left to right across a period.
Thus the elements according to the decreasing atomic radius are arranged as -
K, Ca, Sc, Ga, Ge, As, Br, Kr
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A bottle contains 75 mL of ethyl chloride. The density of ethyl chloride is 0.765 g/mL, what is the mass of ethyl chloride in the bottle?
Answer:
[tex]51y6. \times { \times }^{2} [/tex]
In Part A, you found the number of moles of product (1.80 mol P2O5 ) formed from the given amount of phosphorus and excess oxygen. In Part B, you found the number of moles of product (1.40 mol P2O5 ) formed from the given amount of oxygen and excess phosphorus.
Thủy phân hoàn toàn 62,5 g dd saccarozo 17,1%, trong môi trường axit
vừa đủ ta thu được dung dịch X. Cho AgNO,NH, vào dd X và đua nhẹ thu
được khối lượng Ag là
Answer:
có trong vietjack nè má, vô coi đi
Explanation:
https://khoahoc.vietjack.com/question/7374/thuy-phan-hoan-toan-62-5-gam-dung-dich-saccarozo-17-1-trongmoi-truong-axit
Please do 20 and 21 I will give you extra points!!!
Answer: #20
Explanation:
if the sun got dimmer then plants would that need a high tempature would not be able to grow it would also be very cold