Answer:
D.
Explanation:
A. is double replacement. Ex. AX + BY -> AY + BX
B. is synthesis Ex. A + B -> AB
C. is synthesis
D. is Single replacement -> A + BX -> Ax + B
- Study definitions and examples of these and that will help.
When zinc react with sulfuric acid, then zinc sulphate is formed. Zn + H₂SO₄ → ZnSO₄ + H₂ this reaction is replacement reaction.
What is replacement reaction ?One element in a molecule is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.
One element in a compound is switched out for another in a single replacement reaction. In a double-replacement process, the anions or cations of two ionic compounds are switched. In a double-replacement reaction known as a precipitation, a solid precipitate is one of the products.
One ingredient replaces another comparable element in a compound in a single-replacement reaction.
Thus, option D is correct.
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please help me with answering this question :( asap!!
Answer:
32. CnH2n+2
33. Ester
34. Water and corbondioxide.
35. dibromoethane
help me slove this question
which places have more kinetic energy than potential energy
Answer:
usually at a higher place or height as in at the highest point on a roller coaster.
Explanation:
8. In
studies, scientists do not interfere with what is going on.
Answer:
Observational
Explanation:
This is the answer because researchers or scientist observe the effect of a diagnostic test, treatment or other intervention without trying to change anything.
What is the name of the ionic compound LigPO,?
lanthanum phosphide
lanthanum phosphide
lithium phosphate
lanthanum phosphate
lithium phosphate hope this helps
CONCLUS Your conclusion will include a summary of the lab results and an interpretalion of the results. Please answer al questions in complele sentences using your own words Using two to three sentences, summarize what you investigated and observed in this lab What I observed in this lab was what materials to use for different things. I also learned how to make things sturdier. 2 What building malerial did you use to build your house? My house is made.autof brick and/or clay brick and wood. 3 Did your results support or fail to support your hypotheses? Type Here IN 4 What were the densities of the malerials you chose for the was ond floor for the home in Thy Worlar Type Here Why do you think a building material's density is important when building homes or architectural structures? Type Here Why wouldn't you choose wood or aluminium for the lalches on your house? Type Here Help Improve Office Notes
Answer:
Here’s the answer
Explanation:
what does the chemical formula Ba(HCO3)2 tell us about number of atoms of each element present
Answer: The chemical formula is Ch(HCO3)2 and Cn(HO3)2
Explanation:
There is 1 atom of Ba, 2 atoms of hydrogen, 2 atoms of carbon, and 6 atoms of oxygen.
What are molecules?The smallest particle of a substance has all of the physical and chemical properties of that substance.
The chemical formula Ba(HCO3)2 tells us about the number of atoms of each element present as follows:
1 atom of Ba
2 atoms of hydrogen
2 atoms of carbon
6 atoms of oxygen.
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Which of the following example(s) from everyday life are made possible by modern chemistry?
If you could help me out I would really appreciate it. Thank you!
Answer:
I believe it is c
Explanation:
........................
From everyday life the following have been made possible by modern chemistry:
b. wearing a synthetic spandex athletic shirt
c. taking a pill to get relief from a cold
d. getting a boost of energy by eating an apple
Modern chemistry is a branch of chemistry that deals with the identification of structure, composition, physical as well as chemical properties of the substances that can help modern day humans to deal with their day to day problems like poor health, meeting energy requirements and others. Spandex is a material that has a chemical nature of absorbing the sweat from the body of athlete so this can be a part of modern chemistry. The chemical formulation of pill will help in fighting with the cold causing infecting agent in the body so it will help in overcoming the ill effects of cold thus helping mankind, so it is the part of modern chemistry. Apple is a source of sugar when it is metabolically broken in the body it releases energy which can be utilized by the body as a source of energy so it is a part of modern chemistry. Observing the sky at night during campaign is a physical phenomena.Hence, use of spandex in athletics shirt, pill for overcoming cold and apple as source of energy are parts of modern chemistry.
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Electrons are in regions around the nucleus called energy levels. The first
energy level
Answer:
can only accommodate 2 electrons
what is the chemical name of C9F7
Answer:
Chlorogenic acid.
Explanation:
Answer:
chlorofluorocarbons
Explanation:
trial 2, 2.68 g/cm/3 trial 3, 2.84g/cm/3. aluminum has a density of 2.70g/cm/3 calcute the percent error for each trial.
Answer:
trial 2: 0.74
trial 3: 5.19
I think but the equation for sloving percent error is:
(true value - determined value)/true value * 100
Explanation:
Forming a hypothesis is accomplished through___ reasoning
The density of liquid mercury is 13.6 g/mL. What is the mass of a 175 mL sample of mercury?
Answer:
The answer is
2380 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of mercury = 13.6 g/mL
volume = 175 mL
The mass of the metal is
mass = 13.6 × 175
We have the final answer as
2380 gHope this helps you
PLEASE HELP ME QUICK
When an iron nail is ground into powder, its mass ____.
a. stays the same
b. decreases
c. increases
d. cannot be determined
When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?
a. a physical change
b. a chemical change
c. neither a physical change nor a chemical change
d. both a physical change and a chemical change
Answer:
1.It stays the same
Explanation:
because its only the natural stature of it has changed
Which atom has a configuration that ends in 5s 2?
Answer: Zirconium [Kr]4d :)
Explanation:
Which mineral is found in almost every type of rock?
Answer:
Olivine
Explanation:
Hope this helps! :) x
Approximately how tall is Baker Hill? Don't forget your unit
Answer:
the elevation is 1,539
Explanation:
can someone please help me
Answer:
GoldExplanation:
A single atom of silver has a total of 47 protons and electrons and 61 neutrons. ... Therefore, gold has a density of 19.32 g/cm3 whereas silver has a density of only 10.49 g/cm3. Thus, a 1 oz bar of gold will be almost half as large as a 1 oz bar of silver1.
What is the chemical symbol for silver?
Answer:
Explanation:
Ag
The sum of two integers is -4. Can the two integers both be positive?
Answer: No.
Explanation: A negative integer can only be made with 2 negative integers or 1 positive and 1 negative integer.
Boron (B) has two Isotopes, boron-10 and boron-11. The atomic weight of boron is the
A. combined masses of boron-10 and boron-11
B. average number of neutrons in boron-10 and boron-11
C. weighted average of the masses of boron-10 and boron-11
D. mass of boron-10 minus the mass of boron-11
Answer:
C. is the correct answer
Explanation:
I just completed this question and got it correct.
A student is measuring the volumes of nectar produced by a flowering plant for an experiment. He measures nectar from 50 flowers using a graduated cylinder that measures to the nearest millilitre (mL). Which statement describes a change that can help improve the results of his experiment?
A.) His measurements will be more precise if he takes measurements from an additional 100 flowers. B.) His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. C.) His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL. D.) His measurements will be more accurate if he takes measurements from an additional 100 flowers.
NEED HELP NOW PLEASE!!!
Answer:
His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL.
Explanation:
His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. The correct option is B.
The closeness of a measurement to the real or recognised value is referred to as accuracy.
The learner can achieve more exact measurements and eliminate the possibility of rounding mistakes by using a graduated cylinder that measures to the closest tenth of a millilitre.
This enhanced precision will help to improve measurement accuracy. Taking measurements from more flowers (options A and D) will expand the sample size but will not enhance accuracy unless the measuring device is updated.
Option C recommends improving precision but does not address accuracy.
Thus, the correct option is B.
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(01.04 MC)
Describe two distinct ways in which the skin could help cool the body on a hot day. (5 points
kate and williams wedding cost about 21,000,000 english pounds how much is this in american dollars if
Answer:
2$
Explanation:
bru
How do you convert 8.5600x[tex]10^{2}[/tex] from scientific notation to standard notation?
Answer:
856.00
Explanation:
just move the decimal two places to the right :)
Read the time line. A timeline. The timeline lists the following years: 100 B C E, 1 C E, 100 C E, 200 C E, 300 C E, 400 C E, 500 C E. What time intervals are used on the time line? one year one hundred years five hundred years one thousand years
100 years
There's 100 years in between each listed year.
Answer:
A 100
Explanation:
Which would be an example of a homogeneous mixture?
Question 10 options:
Sprite
marinara sauce
air
ranch dressing
Answer:
Air
Explanation:
Air is an homogeneous mixture because it contain gaseous samples that have the same proportion throughout it's given sample. Air is a mixture of gaseous substances of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, 1% of water vapor and small amounts of other gases in same proportion.
What characteristic of an epic hero does this passage
show?
the ability to embark on a long journey
the ability to receive help from a supernatural force
the ability to speak with confidence
The ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.
What is confidence?
The feeling or emotion or belief that one or a person can have faith in or trust on someone or for something that he or she is doing or about to do and the hero are the inspiration for the society.
In other words a feeling or emotion of self-assurance or self believe arising or rises from an appreciation or motivation of one's own abilities or qualities or performance.
Therefore, ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.
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Answer:
B
Explanation:
Cuz
Which molecule is sometime referred to as “the recipe book for how to make a protein"?
Answer:
RNA molecules
Explanation:
RNA molecules carry the instructions that are necessary to create proteins
Answer:
RNA molecules
Explanation:
RNA molecules carry the instructions that are necessary to create proteins
If 5.0 g of copper cools from 35.0oC to 22.6 oC and loses 23.6 J of heat, what is the specific heat of copper? a. 0.038 J/(g. oC) b. 0.62 J/(g. oC) c. 0.076 J/(g. oC) d. 0.38 J/(g. oC)
Answer:
c = 0.38 J/(g-°C)
Explanation:
Given that,
Mass of copper, m = 5 g
Initial temperature, [tex]T_i=35^{\circ} C[/tex]
Final temperature, [tex]T_f=22.6^{\circ} C[/tex]
When copper cools, it looses 23.6 J of heat. We need to find the specific heat of copper. The heat lost is given by :
[tex]Q=mc\Delta T[/tex]
c is specific heat
[tex]c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{23.6}{5\times (22.6-35)}\\\\c=0.38\ J/g-^{\circ} C[/tex]
Hence, the correct option is d.
how many valence electrons are in the element gallium? explain how you determined the number.
Gallium has three valence electrons.
Elements in the periodic table are classified into groups and periods. Elements in a given group have the same number of valence electrons on their outermost shell while the elements in a period have the same number of shells.
All the elements in group 13 have three electrons in their outermost shell. Gallium is an element of group 13. This means that gallium also has three electrons in its outermost shell(valence electrons).
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Gallium has 3 valence electrons (1 electron in the 4p orbital and 2 electrons in the 4s orbital) because the valence electrons are those located in the outermost energy level of an atom.
Gallium has an atomic number of 31, which means it has 31 electrons in total. The electron configuration of gallium can be represented as [Ar] 3d¹⁰ 4s² 4p¹.
Within the n=4 shell, gallium has electrons in the 4s and 4p orbitals. The 4s orbital can hold a maximum of 2 electrons, while the 4p orbital can hold a maximum of 6 electrons. In the case of gallium, there is 1 electron in the 4p orbital.
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