Answer:
Mass = 22.1 g
Explanation:
Given data:
Mass of nitrogen = 25.0 g
Mass of hydrogen = 4.02 g
Mass of ammonia formed = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Number of moles of nitrogen:
Number of moles = mass/molar mass
Number of moles = 25.0 g/ 28 g/mol
Number of moles = 0.89 mol
Number of moles of nitrogen:
Number of moles = mass/molar mass
Number of moles = 4.02 g/ 2 g/mol
Number of moles =2.01 mol
now we will compare the moles of nitrogen and hydrogen with ammonia.
H₂ : NH₃
3 : 2
2.01 : 2/3×2.01 = 1.3 mol
N₂ : NH₃
1 : 2
0.89 : 2/1×0.89 = 1.78 mol
hydrogen produced less number of moles of ammonia it will act ae limiting reactant.
Mass of ammonia:
Mass = number of moles × molar mass
Mass = 1.3 mol × 17 g/mol
Mass = 22.1 g
Explain how you know it must be oxygen. Where did the oxygen come from?
Answer:
Copper oxide is the only product, and it contains copper and oxygen.
One of the reactants is copper, so the other reactant must be oxygen.
The copper metal must have combined with something in the air.
Explanation:
Calculate the mass of sodium bromide dihydrate is required to prepare 250 mL of a 0.00600 M solution
Answer: The mass of sodium bromide dihydrate is 0.208 grams
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml = 250 ml
moles of [tex]NaBr.2H_2O[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{138.92g/mol}[/tex]
Now put all the given values in the formula of molality, we get
[tex]0.00600=\frac{x\times 1000}{138.92\times 250}[/tex]
[tex]x=0.208[/tex]
Therefore, the mass of sodium bromide dihydrate is 0.208 grams
Imagine you leave a bottle of something toxic to humans open overnight in a sealed laboratory.
The levels of solution drastically drop, and you do not know if it is harmful or not with your
knowledge of the ideal gas law, explain how you can determine whether it is safe or not in the
laboratory Use a simple experimental setup to support your argument
Answer:
Argument: It is not Safe
Further support to the argument is given below.
Explanation:
Solution:
Argument: It is not Safe
First of all, we all know the ideal gas law:
PV = nRT
And the Boyle's Law states that , if the pressure is increased then, volume will decrease. and if the volume is increased then pressure will decrease.
V is inversely proportional to Pressure of the gas.
So, in this case, Let's suppose we have toxic solution of methyl alcohol in the bottle which is tightly closed. It means pressure in the bottle is high, hence the volume is less.
If in this scenario someone, leave the bottle open in the laboratory and as it is given that the level of solution will drastically decrease. It means it is volatile in nature and is converted into gaseous form and we know now that the open bottle has now less pressure. Hence the volume of the gas will be higher and now it can spread to every corner of the laboratory. And it is very dangerous.
Beth heats a pot of water to cook pasta.
What may happen as a result of adding heat?
Answer: i’m taking a test w this question rn and i think the best answer is D. When the water begins to boil, some of the water molecules will gain enough energy to change into a gas. i could def be wrong tho
What type of sugar derivative has the aldehyde group (-CHO) of an aldose replaced by a carboxylic acid group (-COOH)
Answer:
Aldonic acids
Explanation:
Aldonic acids are a group of sugar acids which are derived from the oxidation of the aldehyde group (-CHO) of an aldose to a carboxylic acid group (-COOH).
The aldehyde group of monosaccharides is easily oxidized to the carboxylic acid group by relatively mild oxidizing agents such as copper (ii) ions and the products are called aldonic acids. This oxidation of monosaccharides such as glucose and other reducing sugars is the basis for the test for reducing sugars using the Fehling's reagent, whereby blue copper (ii) ions in solution are reduced to red copper (i) oxide which precipitate out of solution. The most common oxidizing agent used in preparation of aldonic acids is bromine. For example, oxidation of D-glucose by bromine water at C1 yields D-gluconic acid.
Aldonic acids do not usually exist in hemiacetal ring forms but are generally found in their lactone form which are cyclic structures formed by an ester linkage between the carboxylic group and one of the hydroxyl groups of the same molecule.
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Explanation:
im bumb like really bumb
What would happen if the kinetic energy of the reactants was not enough to provide the needed activation energy
Answer:
The products would not be formed or the reaction could not be carried out.
Explanation:
Sometimes in these situations it is chosen to place a chemical compound that accelerates the reaction and increases the kinetic energy of the reactants, without altering their chemical composition, and this is called a catalyst, which can be anything from a protein to a macromolecule.
Use your periodic table to complete the table below. The first one has been done for you.
Element
Atomic #
Mass
Protons
Neutrons
Electrons
Symbol
Iodine
53
127
53
74
54
I1-
35
17
Cl1-
Hydrogen
1
1
0
35
45
36
5
11
B3+
Oxygen
16
8
10
Element
Atomic #
Mass
Protons
Neutrons
Electrons
Symbol
Nitrogen
7
7
10
Aluminum
27
10
56
26
24
29
35
Cu1+
64
29
27
Match each of the positive ions listed with the total number of electrons that ion contains. Use your periodic table. The same answer may be used more than once.
A) 2 B) 10 C) 21 D) 23 E) 24
F) 25 G) 36 H) 48 I) 76 J) 81
____ Al+3 ____ Fe+3 ____ Mg+2 ____ Sn+2
____ Li+1 ____ Cr+3 ____ Rb+1 ____ Pt+2
Answer: my epic on fortnite is
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6. A. If 4.50 mols of ethane, C2H6, undergoes combustion according to the unbalanced equation
C2H6 + O2 ----------> CO2 + H2O
how many moles of oxygen are required?
B. How many moles of each product are formed?
Answer:
for one mole of C2H6 there are 7/2 mole of O2 required. so for4. 50 moles you require 4.50 x 7/2 = 15.75 moles of O2.
Explanation:
i hope it's helpful
2. Using a heater to heat up your cold room is an example of...
Hot air
rises
Air cooled
by room
sinks
Gravity
furnace
Conduction
Convection
Radiation
Answer:
Convection. Happens when air surrounding the heater is heated
5 Cu3(PO4)2
Which of the following is the coefficient?
Answers:
A.) 5
B.) 3
Sometimes atoms form molecules by sharing two pairs of valence electrons. When this occurs, the atoms are said to be joined by...
Answer:
A double covalent bond
Explanation:
A double covalent bond is a situation where we have two pairs of electrons shared together between the atoms instead of just one pair. Oxygen gas is an example of a simple molecule that contains double bonds.
In other words, it is a type of chemical bond that has 2 electron pairs shared between two atoms.
where do convection currents occur
Answer: Lava lamps, Earth's mantle, and the Earth's atmosphere.
Explanation: Convection occurs when denser elements sink while less dense elements rise due to difference in density caused by heat.
The wax in lava lamps rises when heated up since their density decreases. The same is for the Earth's mantle, where hotter materials rise, while the cooler ones sink.
how do I connect a nuclear transfer pipe to an energy condenser that is connected to a tessoract?
Answer:
Yes You use the nuclear transfuser to do that
Explanation:
Answer:
tessoract? also why did you stael my name?
Explanation:
A chemist adds of a potassium permanganate solution to a reaction flask. Calculate the mass in grams of potassium permanganate the chemist has added to the flask
Answer:
3.41 g
Explanation:
A chemist adds 260.0 mL of a 0.0832 M potassium permanganate solution to a reaction flask. Calculate the mass in grams of potassium permanganate the chemist has added to the flask.
Step 1: Given data
Volume of the solution (V): 260.0 mL (0.2600 L)Molar concentration of the solution (C): 0.0832 M (0.0832 mol/L)Step 2: Calculate the moles (n) of potassium permanganate added
We will use the following expression.
n = C × V
n = 0.0832 mol/L × 0.2600 L = 0.0216 mol
Step 3: Calculate the mass corresponding to 0.0216 moles of potassium permanganate
The molar mass of potassium permanganate is 158.03 g/mol.
0.0216 mol × 158.03 g/mol = 3.41 g
What would happen if the earths orbit was longer or shoter?
Answer:
If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.
Explanation:
Hope this helped! Please give brainly if you want!
Explanation:
If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.
A(n) _______________ holds municipal solid waste, construction debris, and some types of agricultural and industrial waste.
Answer:
sanitary landfill
Explanation:
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If an element has three isotopes with known masses, what other information
is needed to find the average atomic mass of the element?
A. The number of neutrons in each isotope
B. The average mass of the isotopes
C. The atomic number of each isotope
D. The abundance percentage of each isotope
Answer: D
Explanation: Hope this helps!
Which finding would have disproved Virchow’s hypothesis?
a. Animalcules are not organisms.
b. Animals are made of non–cell-based matter.
c. Plants are made of non–cell-based matter.
d.Cells can generate from nonliving matter.
Answer:
DJSZJDSFRBGUEJD HVCX
Explanation:
Determine the number of valence electrons for the following: [kr] 5s2 4d6
A)5
B)2
C)4
D)7
E)8
F)6
Answer: B) 2 (as indicated by electron distribution shown), but taking into account the real properties of this element, 4,7,8 also occur (see below).
Explanation:
This is the electron complement/atomic number of ruthenium, which actually has the structure [Kr] 5s1 4d7
Nevertheless, Ru does not form Ru(I) compounds and few Ru(II) compounds (RuCl2, RuBr2, RuI2). It also forms Ru(III)Cl3 and a larger number of Ru(IV) compounds, e.g. RuO2, RuS2. It also forms RuO4
What coefficient of 02 should be added so the number of atoms of oxygen is conserved on both sides of the reaction equation
Answer:
5
Explanation:
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Which section of a narrative shows the protagonist deciding to solve a problem?
Climax
Exposition
Resolution
Rising action
Which statement best describes a waxing gibbous moon?
The moon has moved past the new moon and is moving toward the first quarter.
The moon has moved past the first quarter and is moving toward the full moon.
The moon has moved past the third quarter and is moving toward the new moon.
The moon has moved past the full moon and is moving toward the third quarter.
the second option is best described
Explanation:
.
How many electrons can fit in the second electron shell?
Question 3 options:
2
6
8
4
Answer:
C. 8
Explanation:
The second shell can hold a maximum of eight electrons. When this is filled, electrons go into the third shell, which also holds a maximum of eight electrons. Then the fourth shell begins to fill. A lithium atom, for example, has three electrons.
PLEASE HELP I WILL MARK BRAINLIEST!!!
Reactions In Our World Lab Report
Reactions in our natural world range from classical chemical reactions to nuclear reactions.
What is a chemical reaction?A classical chemical reaction is a natural process that occur when one or more elements called reactants change to form one or more products.
Chemical reactions can be speed up by the action of enzymes, which are biological catalysts capable of lowering the activation energy of the reactions.
On the other hand, nuclear reactions occur when atoms react among them to generate new elements.
Nuclear reactions can be classified into fusion reactions where atomic nuclei fuse and fusion reactions where an atomic nucleus gives rise to two different atoms.
In conclusion, Reactions in our natural world range from classical chemical reactions to nuclear reactions.
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If earth is 1.50 x 10^8km from the sun what is the distance in Mm?
The distance of the earth to the sun in Mm = 1.5 x 10⁵
Further explanationGiven
The distance of the earth to the sun : 1.50 x 10⁸ km
Required
The distance in Mm
Solution
In converting units we must pay attention to the conversion factor.
the conversion factor :
1 kilometer(km) = 10⁻³ megameter(Mm)
So the distance conversion :
1.5 x 10⁸ x 10⁻³ = 1.5 x 10⁵ Mm
What happens when sodium undergoes a chemical reaction with chlorine? A The two substances form a heterogeneous mixture B. The two substances form a homogenous mixture C A new compound is formed – salt D The two substances undergo various physical changes
Answer:
C.) A new compound is formed - salt
Explanation:
Na is a metal
Cl is a nonmetal
When they are combined, they form ionic bonds as they seek to fill their octets. Salts are ionic compounds.
When sodium undergoes a chemical reaction with chlorine, a new compound is formed known as sodium chloride or common table salt. The correct option is C.
Chemical reaction is a chemical process, which involves the transformation of one or more substances, called reactants, into new substances, called products. These reactions occur when atoms or ions or molecules rearrange their bonds to form different chemical compounds.
The reaction between sodium and chlorine is highly exothermic (releases heat energy) and produces a violent reaction, resulting in the formation of a stable ionic compound.
The balanced chemical equation for this reaction is:
[tex]2Na + Cl_2\rightarrow 2NaCl[/tex]
In this reaction, the sodium atoms (Na) lose one electron each to achieve a stable electron configuration, forming sodium ions (Na+), while the chlorine molecules [tex](Cl_2)[/tex] gain one electron each to form chloride ions (Cl-). The resulting sodium ions and chloride ions attract each other due to their opposite charges, forming a three-dimensional crystal lattice of sodium chloride.
Therefore, when sodium undergoes a chemical reaction with chlorine, a new compound is formed that is salt. Option C is the correct answer.
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a gas expands from 266 mL to 983 mL at constant temperature. calc the work done (in joules) by the gas if it expands against a vacuum. also call the work done (in joules) by the gas if it expands against a constant pressure of 4.09 atm.
Answer:
w₁ = 0 J
w₂ = -297 J
Explanation:
Step 1: Given data
Initial volume: 266 mL (0.266 L)
Final volume: 983 mL (0.983 L)
Step 2: Calculate the work done (in joules) by the gas if it expands against a vacuum
We will use the following expression.
w₁ = -P₁ × ΔV
Since the gas expands against a vacuum, P₁ = 0. Thus, w₁ = 0 J
Step 3: Calculate the work done (in joules) by the gas if it expands against a constant pressure of 4.09 atm
We will use the following expression.
w₂ = -P₂ × ΔV
w₂ = -4.09 atm × (0.983 L-0.266 L) = -2.93 atm.L
Then, we convert w₂ to Joule using the conversion factor 1 atm.L = 101.325 J.
-2.93 atm.L × 101.325 J/1 atm.L = -297 J
Which structures allow communication between plant cells?
The cells in both plants are animals are connected together and communicate through some specified structures. In plants cells are connected by a tubular structure called plasmodesmata.
What are cells?Cells are the basic units of every lives. A cell contains a nucleus which is the center of a cell and regulates the overall functions of the cell. The cytoplasm of cells are connected for communication by some structure which are different for plants and animals.
In the case of plants, the cells junction or the structure which connects adjacent cell is called plasmodesmata which links the endoplasmic reticulum, cytoplasm and plasma membranes of the plant cells.
Through these microscopic channels transport of smaller ions and signals are passed to adjacent cells. A typical plant cell might have about 100000 plasmodesmata connecting the cells.
Plasmodesmata appears to be continuous extension of the cell membrane. Hence, the structures that allow communication between plant cells is Plasmodesmata.
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classify the sentences based on the chemical reactions they describe.
