Answer:
Direct Redox Reactions. When a strip of zinc metal is placed into a blue solution of copper(II) sulfate ( Figure below ), a reaction immediately begins as the zinc strip begins to darken. If left in the solution for a longer period of time, the zinc will gradually decay due to oxidation to zinc ions
Explanation:
We need to balance the equation then can we say
[tex]\\ \rm\Rrightarrow CuSO_4+Zn\longrightarrow Cu+ZnSO_4[/tex]
It's already balancedZn does the reaction so zinc is the limiting reagent ,
Until zinc is present the reaction continues
ammonia gas is used as refrigerant 0.474 atm. Pressure is required to change 2000 cm3 sample of ammonia initially at 1.0 atm to 4.22 dm3 at constant temperature. Show this data in boyles law
Answer: The pressure required is 0.474 atm
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}V}[/tex] (At constant temperature and number of moles)
The equation is,
[tex]{P_1V_1}={P_2V_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 1.0 atm
[tex]P_2[/tex] = final pressure of gas = ?
[tex]V_1[/tex] = initial volume of gas = [tex]2000cm^3[/tex]
[tex]V_2[/tex] = final volume of gas = [tex]4.22dm^3=4220cm^3[/tex] ([tex]1dm^3=1000cm^3)[/tex]
Now put all the given values in the above equation, we get:
[tex]{1.0\times 2000}={P_2\times 4200}[/tex]
[tex]P_2=0.474atm[/tex]
The pressure required is 0.474 atm
An atom is determine to have 17 protons, 18 electrons, and 18 neutrons. What are the mass number and charge of this atom or ion
Answer:
Mass # = Protons + Neutrons= 35
The charge is -1 because 17 protons arent equal to the 18 electrons each has a -1 charge
Explanation:
I need help with this please! and thank you. if you don't know, don't comment please.
Answer:
S4O5
Explanation:
2 points
Al + HCI—_AICI:
+_H2
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
Mood stabilizers may be used to treat (2 points)
Group of answer choices
schizophrenia
bipolar disorder
major depression
ADHD
Answer:
A
Explanation:
it can be help to remove mood swing
Answer:
Bipolar disorder
Explanation:
People with bipolar disorder face extreme episodes of different moods, so mood stabilizers help calm those extremes down and allow the person to retain a consistent mood.
Someone who is good in chemistry please help.
Answer:
2.0×10⁻⁶ mol
Prefix = (2)
exponent = (-6)
Explanation:
Given data:
Number of molecules of water = 1.23×10¹⁸ molecules
Number of moles of water = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
1.23×10¹⁸ molecules × 1 mol / 6.022 × 10²³ molecules
0.20×10⁻⁵ mol
2.0×10⁻⁶ mol
Prefix = (2)
exponent = (-6)
to measure out a volume of liquid, start by choosing the appropriate graduated cylinder and moving the bumper to the
To measure out a volume of liquid, start by choosing the appropriate graduated cylinder and moving the ____ Bumper__ to the top ___of the graduated cylinder to protect it from breakage. Then, pour the liquid into the graduated cylinder until the__ bottom___ of the meniscus aligns with the desired volume marking when you look at the graduated cylinder from ___eye level___
Bumper to the top, until the bottom aligns, look from eye level
To measure out a volume of liquid, start by choosing the appropriate graduated cylinder and moving the bumper to the Bumper to the top of the graduated cylinder to protect it from breakage. Then, pour the liquid into the graduated cylinder until the untill the bottom aligns of the meniscus aligns with the desired volume marking when you look at the graduated cylinder from look from eye level
What is Volume of liquid ?A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Although there are many additional units that can be used to indicate volume, the most used ones are litres, cubic metres, gallons, millilitres, teaspoons, and ounces.
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Complete Question
To measure out a volume of liquid, start by choosing the appropriate graduated cylinder and moving the bumper to the ___ of the graduated cylinder to protect it from breakage. Then, pour the liquid into the graduated cylinder until the ___ of the meniscus aligns with the desired volume marking when you look at the graduated cylinder from ____.
What’s the answer????
What happens to most of the radiant energy that is not converted to thermal energy?
a. It is used in photosynthesis.
b. It is reflected into space.
c. It is converted to electricity.
d. none of the above
6 Apply fill in the genotypes and phenotypes of the
parents and offspring in this Punnett square. Sketch
the resulting offspring possibilities in the white boxes
below. (Hint: Assume complete dominance.)
Key:
R Round pea
Genotype:
Phenotype:
allele
r Wrinkled
pea allele
R
O
O
R
Genotype:
Phenotype:
Genotype:
Phenotype:
Genotype:
Phenotype:
O
mis on :3
Genotype:
Phenotype:
Genotype:
Phenotype:
In your own words, please write a paragraph explaining what chemical and physical properties of elements mean.
Answer:
If this anwser helped you mark it the brainest please
Explanation:
Properties are features, qualities or characteristics of an item. Properties shall be used to classify the components. Properties are the attributes of a material that separates it from another substance. These properties are called physical properties and chemical properties in chemistry.
The colored circles below represent three fake elements A, B
and C.
The fake elements combine to form the following compound.
What is the chemical formula for the compound shown above?
The chemical formula for the compound is AB₂C₄.
What are chemical formula?A chemical formula is define as a formula which identifies each constituent element by its chemical symbols, and indicate the proportionate number of atom of each elements.
Chemical formula is can also be called as empirical formula.
Example - Chemical formula for water is H₂O.
Chemical formula provides chemical composition of a compound.
Chemical formula of a compound is crucial when it represents a chemical equation.
Thus, the chemical formula for the compound is AB₂C₄.
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similar
ffer.
jum
eride
Which statements are true regarding these two
compounds? Check all that apply.
Acetone is a covalent compound, while
sodium chloride is an ionic compound.
Ionic compounds conduct electricity well in
their solid (pure) form.'
Covalent compounds have weak attractions
between molecules, resulting in low melting
points.
ECI
1°C
olid
Answer:
-Acetone is a covalent compound, while sodium chloride is an ionic compound
-covalent compounds have weak attractions between molecules, resulting in low melting points
Explanation:
Answer: A and C mah dudes
Explanation: Edgy 2020 <3
The process of fermentation involves chemical reactions that convert solid glucose (C6H12O6) into aqueous ethanol and carbon dioxide gas. Suggest how the speed of reaction alters as the temperature changes from 60C to 30C.
Explanation:
The glucose molecules changes as following:
C6H12O6 —> C2H5OH + CO2
There are 12 atoms of H on the left side and 6 atoms of the right side. It can be balance by putting 2 in front of C2H5OH as shown below:
C6H12O6 —> 2C2H5OH + CO2
There are 6 atoms of C on the left side and 5 atoms on the right side. It can be balance by putting 2 in front of CO2 as shown below:
C6H12O6 —> 2C2H5OH + 2CO2
which element will chemically combine with fluorine to form a salt?
a. carbon
b. lithium
c. neon
d. oxygen
Solve these problems remember significant figures
Answer:
56) 5,722 mL
57) 750 meters
58) 88 km/hr
59) 88 km/? (I can't give you a complete answer if there's no other unit)
60) 5,169g
61) 53.1m/sec
Explanation:
When you are doing sig figs you do its operations normally. However the way you round depes on the operation;
When you are adding or subtracting sig figs you round to the least number of decimal places. In the case where there is no decimal place keep it the same
When you are multiplying or diving sig figs you round to the least amount of sig figs
The work is in the picture
Balance the equation with the correct coefficients. 2 3 4 5
(KCIO3-------> ( )KCI+( )O2
Answer:
2(KCLO3) - - - - > (2)KCL + (3)O3
Explanation:
MARK MY ANSWER AS BRAINLIEST AND THANK ME
How many molecules are in 1 mole of nitrogen sulfide
Answer:
46.07
Explanation:
im not 100 sure this is right almost tho
please mark brainliest
When mercury oxide is heated, it decomposes into mercury and oxygen. If 28. 4 g of mercury oxide decomposes, producing 2. 0 g of oxygen, what is the percent by mass of mercury in mercury oxide?.
In mercuric oxide percent by mass of mercury is 93 %.
The mercuric oxide molecular formula is HgO. When mercury is reacted with oxygen, then it forms the product mercuric oxide. Mercuric oxide has a molecular mass of 216 g/mol. It has a melting point of 500°C.
The balance equation for the reaction of decomposition of mercury oxide into mercury and oxygen is,
[tex]2HgO (s)→ 2Hg (l) + O _{2}(g)[/tex]
Mass of mercury oxide = 28.4 g
Mass of the oxygen = 2 g
In mercuric oxide percent by mass of mercury is,
[tex]Mass ℅= \frac{Mass \: of \: Mercury }{Mass \: of \: Mercury \: oxide} \times 100[/tex]
[tex]= \frac{28.4 - 2}{28.4} \times 100[/tex]
= 93 %
Therefore, in mercuric oxide percent by mass of mercury is 93 %.
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YOU BETTER NOT PASS THIS!! NEED ANSWERS NOW
What are you separating when you use the process of distillation? DESCRIBE how you would separate a mixture using distillation.
Answer:
the process of separating several mixtures of coal with the process of fractional distillation
Explanation:
Read the dictionary entry. The adjective radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. Releasing heat 2. Made of radiation 3. Filled with light or very bright The noun radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. The origin of a meteoric shower Read the sentence. She looked at the nighttime sky and saw the silver moon's radiant glow. Which dictionary definition best describes how the word "radiant" is used in this sentence? releasing heat made of radiation filled with light or very bright the origin of a meteoric shower
Answer:
Filled with Light or Very Bright
Explanation:
I took the quiz.
Answer:
your answer is the third one filled with light and very bright
Explanation:
i got it right on the quiz hope it helps
What mass of hydrogen peroxide is produced when 1. 46 g of barium peroxide react with 30. 0 ml of nitric acid solution that contains 0. 0754 g of the acid per ml?
When 1. 46 g of barium peroxide reacts with 30. 0 ml of nitric acid solution that contains 0. 0754 g of the acid per ml, the mass of the hydrogen peroxide it will produce is 0.293 g.
If the nitric acid solution contains 0.0754g of the acid per ml. then 30 ml of this contains a mass of:
mass of nitric acid = (0.0754g acid/ml) x 30 ml
mass of nitric acid = 2.262 g
Determine the number of moles of each reactant.
barium peroxide : moles = mass/MM = 1.46g/169.33 g/mol = 8.622216973 x 10-3
nitric acid : moles = mass/MM = 2.262g/63.01 g/mol = 0.03589906364
The reaction of barium peroxide with nitric acid follows the balanced chemical reaction below:
BaO2 + 2(HNO3) = H2O2 + Ba(NO3)2
1 mole of Barium peroxide reacts with 2 moles of nitric acid will produce 1 mole of hydrogen peroxide and 1 mole barium nitrate.
Using the stoichiometry, or the relationship between the amounts of substances that are involved in the chemical reaction, we can determine how much hydrogen peroxide will be produced.
If there is 8.622216973 x 10-3 moles barium peroxide, then it needs twice as much nitric acid.
moles nitric acid = 2(8.622216973 x 10-3)
moles of nitric acid = 0.01724443395
Since the amount of nitric acid we have for the reaction is greater than the calculated moles of nitric acid needed, all the barium peroxide will be used.
moles of nitric acid needed < moles of nitric acid we have
0.01724443395 < 0.03589906364
Since the barium peroxide is the limiting reagent, we will use its amount as reference.
8.622216973 x 10-3 moles barium peroxide
reacts with
0.01724443395 moles nitric acid
will produce
8.622216973 x 10-3 moles hydrogen peroxide
and
8.622216973 x 10-3 moles barium nitrate
To solve for the mass of the hydrogen peroxide, multiply its amount to its molar mass.
mass of hydrogen peroxide = 8.622216973 x 10-3 mol(34.0147g/mol)
mass of hydrogen peroxide = 0.2932821237 g
mass of hydrogen peroxide = 0.293 g
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In Philip’s French class, the students are learning how to pronounce closed vowels and open vowels. The students are most likely studying French __________. A. syntax B. phonemes C. semantics D. morphemes
Answer:
It sounds like they are studying French phonemes
Explanations:
I just learned this.
The students were most likely studying French phonemes.
Words are distinguished from each other by respective sounds of the vowels in the word. There are open vowels and there are closed vowels. These exist in every language.
The part of language learning that has to do with the differentiation of pronunciation of sounds is called phonemes. This means that the students were most likely studying French phonemes.
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ellis measured the mass of five samples of quartz. his results were 39.75 g, 38.91 g, 37.66 g, 39.75 g, and 39.55 g. what was the mean mass of the samples? (p. 37
The mean mass of the given sample is 39.12g
The mean is the average of the values in the given set. It indicates that values in a particular data set are distributed equally.mass of first sample = 39.75g
mass of second sample = 38.91g
mass of third sample = 37.66g
mass of fourth sample = 39.75g
mass of fifth sample= 39.55g
Total mass of the sample = 39.75 g + 38.91 g+ 37.66 +39.75 g + 39.55 g = 195.62 g
Number of samples = 5
MEAN = SUM OF MASS OF GIVEN SAMPLES / TOTAL NUMBER OF SAMPLE= 195.62/5= 39.12gTherefore mean mass of the samples = 39.12g
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If the length of a cube is 2.5 cm, the width is 2.5 cm, the height is 2.5 cm and the mass of the
cube is 157 grams. What is the density of the cube? Round answer to the nearest tenth.
(Bonus) What is the most likely charge for a strontium (Sr, #38) ion? (1 pt)
*
1 point
-1
+1
-2
+2
-3
+3
+2 is the most likely charge for a strontium.
What is a charge?Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction.
An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.
A strontium cation, a divalent metal cation, and a monoatomic dictation are all parts of strontium(2+). It plays the part of a cofactor.
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example of a man-made object that has been changed by weathering
Answer: A man-made object that has been changed by weathering is the pyramids. The pyramids in Egypt have weathered slowly because of the dryness of the desert, but they have indeed weathered throughout the years.
what is the formula of nitrous acid
Answer:
HNO2
Explanation:
It is a pale blue solution and it is only known in solution and gas form.
An -ite or -ate ending on the name of a compound indicates that the compound:
Explanation:
I'm not sure what it is
What kind of bonding holds together
the atoms in a sample of pure zinc
Answer:
Metallic Bonding
Explanation:
Zinc is a metal, as such it's atoms are held together by the metallic bond. Metallic bond is a type of chemical bond formed between positively charged ions in which there is a collective sharing of a sea of valence electrons.