The amount of heat which is released during the given change is -1,369.68 Joules.
How do we calculate the required heat?Required amount of heat in any chemical reaction will be calculated as:
Q = mcΔT, where
m = mass = 4.25 + 60 = 64.25g
c = specific heat = 4.18 J/g. degree C
ΔT = change in temperature = 16.9 - 22 = -5.1 degree C
On putting values, we get
Q = (64.25)(4.18)(-5.1) = -1,369.68 J
Hence released heat in the reaction is -1,369.68 J.
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What does an embryo do in a seed
Answer:
The embryo, endosperm, and seed coat are the three major parts of a seed. An embryo is the young multicellular organism formed before it emerges from the seed. A seed is an embryonic plant, which stores food and is enclosed in a protective outer covering, which give rise to a new plant.
16. What part of the atom does radioactivity involve?
O Outer energy shells
Nucleus
O Entire atom
Inner energy shells
Answer:
inner energy shells are involved in radioactive activity
Answer: I think its NUCLEUS
Explanation: Good luck yall
A+certain+protein+was+found+to+contain+0. 579%+zinc+by+mass. +determine+the+minimum+molecular+mass+of+the+protein
Molecular mass is the total of the atomic masses of all the atoms in the molecule. The minimum molecular mass of the protein is 11,363.64 g/mol.
What is the percent by mass?The percent by mass is the percentage composition of the mass of the solute in the mass of the solution.
As the percent by mass of zinc is 0.579 then in 100 gm of substance 0.579 gm zinc will be present. The molar mass of zinc is 65.38 u. Moles of zinc will be calculated as:
[tex]\begin{aligned} \rm moles &= \rm \dfrac {mass}{molar\; mass}\\\\&= \dfrac{0.579}{65.38}\\\\&= 0.0088\;\rm moles\end{aligned}[/tex]
So, the molecular mass of the protein will be:
[tex]\dfrac{100}{0.0088} = 11,363.64 \;\rm g/mol[/tex]
Therefore, 11,363.64 g/mol is the minimum molecular mass of the protein.
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The process due to which a solid directly changes into its vapours.
Help please
Answer:
Sublimation
Explanation:
Most lakes have rivers flowing out of them, carrying water to the ocean. However, some lakes, including the Great Salt Lake and the Dead Sea, have no outlet. Water flowing into these lakes leaves only through evaporation. Considering that the water flowing into the lakes contains many dissolved substances, how does the lack of an outlet affect the composition of these lakes? What would you expect to happen after many more years of inflow and evaporation?
The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.
What is a lake?Lake is a small stream of running water or a channel for water.
Lakes are usually a standing body of water or slow moving. This means that some lakes, including the Great Salt Lake and the Dead Sea, have no outlet.
The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.
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Select the terms that describe a mind map.
detailed
detailed
graphic
graphic
colorful
colorful
textual
textual
unordered
unordered
creative
creative
linear
All these terms describe a mind map detailed graphic , colorful , unordered and creative
What is a mind map ?A mind map is a diagram used to visually organize information into a hierarchyIt shows relationships among pieces of the whole.It is often created around a single concept, drawn as an image in the center of a blank page, to which associated representations of ideas such as images, words and parts of words are added. Major ideas are connected directly to the central concept, and other ideas branch out from those major ideas.The terms that describes a mind map are detailed , as lots of detailing is done using connection symbols
Graphic , they are graphical representation of an information
Colourful , They are colourful as to make it more visually interesting .
Unordered , They information might not be in sequence and so can be called unordered also
Creative , Yes it is creative as it brings out the artist inside you and you think more ideas to make it look more beautiful and understandable .
So All these terms describe a mind map detailed graphic , colorful , unordered and creative.
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Which sample has the largest volume? the density of aluminum is 2. 7 g∙cm–3, and the density of copper is 9. 0 g∙cm–3
The sample which has the largest volume is 5 grams of aluminum.
What is density?Density is the mass of per unit volume.
Given, density of aluminum is 2.7 g.cm
The density of copper is 9. 0 g.cm
Step1: Calculate the volume
a. volume of copper of 1.0 gram
[tex]\dfrac{mass}{density} = \dfrac{1}{9} = 0.112[/tex]
Volume of copper of 5.0 gram
[tex]\dfrac{mass}{density} = \dfrac{5}{9} = 0.55[/tex]
b. aluminum of 1 gram
[tex]\dfrac{1}{2.7} = 0.370[/tex]
Aluminum of 5 gram
[tex]\dfrac{5}{2.7} = 1.851[/tex]
Thus, 5 gram of aluminum has the largest volume.
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Two popular antacids tablets are tums and maalox. the active ingredient in both of these anttacids is calcium carbonate, caco3. tums regular strength tablets contain 0. 747 g and maaloz tablets contain 0. 600 g of calcium carbonate. compare the number of formula units of calcium carbonate in both tums and maalox
The number of formula units of CaCO₃ in Tums is 1.25 times the formula units in Maalox
Avogadro's hypothesis1 mole of CaCO₃ = 6.02×10²³ formula units
But
1 mole of CaCO₃ = 100 g
Thus,
100 g of CaCO₃ = 6.02×10²³ formula units
How to determine the number of formula units in both tabletsFor Tums
100 g of CaCO₃ = 6.02×10²³ formula units
Therefore,
0.747 g of CaCO₃ = (0.747 × 6.02×10²³) / 100
0.747 g of CaCO₃ = 4.50×10²¹ formula units
For Maalox
100 g of CaCO₃ = 6.02×10²³ formula units
Therefore,
0.6 g of CaCO₃ = (0.6 × 6.02×10²³) / 100
0.6 g of CaCO₃ = 3.61×10²¹ formula units
ComparisonFormula units in tums = 4.50×10²¹ formula unitsFormula units in maalox = 3.61×10²¹ formula unitsComparison =?Comparison = Tums / Maalox
Tums / Maalox = 4.50×10²¹ / 3.61×10²¹
Tums / Maalox = 1.25
Cross multiply
Tums = 1.25 × Maalox
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Make a comparison between all five states of matter
Class 9
Answer:
States of Matter
Solid has fixed volume.
Solid has fixed shape.
Solid has high density.
Solids are heavy.
Solid does not flow.
i need a chemistry questions about separating method
How many ions are there in 13grms of K+ ions (k=39,L=6.0by10 raised to power23
Answer:
1) k2O = 2K(1+) + O(2-)This is, every molecule of K2O
Explanation:
hope this helps if not let me know have a blessed day
How does an increase in temperature affect a gas when the volume is fixed? (Fixed means it stays the same.)
Question 13 options:
The molecules have the same kinetic energy, the same distance between particles, and the same pressure
The molecules have a lower kinetic energy, causing a decrease in distance between particles and a decreased pressure
The molecules have higher kinetic energy, causing an increase in distance between particles which causes increased pressure
An increase in temperature at constant volume will increase the kinetic energy and the distance. Thus, option c is correct.
What is Gay-Lussac's law?Gay-Lussac's law is the ideal gas law that defines the direct relation of the temperature to the pressure of the gas at a constant volume.
With an increase in the temperature of the gas, the pressure also rises causing the distance between the particle to expand by the increase in the kinetic energy.
Therefore, option c. the kinetic energy, particle distance, and the pressure increases with tempearture rise.
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Which conclusion is supported by the information in the graph?
Timed!!! 56 minutes left!!!!
The cost of producing a kilowatt of power with a fuel cell will be less than $30 in 2015.
Fuel cell cars are unlikely to be affordable in the near future.
The rate of emissions is decreasing because of inexpensive fuel cell technology.
The environment is unlikely to improve as a result of cheap fuel cell technology.
Answer:
A. The cost of producing a kilowatt of power with fuel cell will be less than $30 in 2015
Why did the United States cut off trade and diplomatic relations with Cuba?
Answer:
It was retaliation for the nationalization of U.S. corporations property by Cuba.
Explanation:
Answer:
Cuba created a communist government and a dictatorship made by Fidel Castro. USA obviously did not approve of this so they responded by severing trade and diplomatic relations with Cuba.
*
Determine the electronegativity difference (AEN) and the type of bond formed
(ionic, polar, non-polar).
BaCl2
Nyour answer
the electronegativity difference (AEN):
<0.5: covalent (non polar)
0.5- 1.7: covalent (polar)
> 1.7 : ionic
BaCl₂
Ba = 0.9
Cl = 3
Cl - B = 3 - 0.9 = 2.1 (ionic)
Can someone help me with my chemistry problem?
Answer:
D. 108g of water
Explanation:
16g CH4 produces 2(18)g of H20
1g CH4 produces [tex]\frac{36}{16}[/tex]g of H2O
48g CH4 produces [tex]\frac{36}{16}[/tex]×48
108g of H20
Answer:
D. 108g of water
Explanation:
When different parts of the oceans are heated unevenly this causes the water to?
Answer:
move in convection currents
Explanation:
When different parts of the oceans are heated unevenly this causes the water to move in convection currents.
For the molecule c3h9n, draw a structural formula and its lewis dot structure
For the molecule propylamine, structural formula and its Lewis dot structure is attached below in image.
What is Lewis dot structure?Lewis structures, or electron dot structures, are diagrams that show how electrons are shared and distributed around atoms. Lone pairs are electrons that belong to a single atom and are represented by dots.
In normal structural formula of propylamine only bonds are showing and in Lewis dot structure with bonds number of lone pair of electrons or charge present on any atom is also showed. Each single bond present in the structure is formed by the sharing of 2 electrons and it is shown in the attached image.
Hence structural formula and Lewis dot structure is attached in the image.
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The molar mass of kcl is 74.55 g/mol. if 8.45 g kcl are dissolved in 0.750 l of solution, what is the molarity of the solution? use molarity equals startfraction moles of solute over liters of solution endfraction.. 0.113 m 0.151 m 6.62 m 11.3 m
Answer: 0.151 M
Explanation:
We first need to convert the amount of KCl into moles. This is 8.45/74.55 = 0.113 moles.
So, the molarity is 0.113/0.750 = 0.151 M
elements was not easily spotted by ancient cultures?
Answer:
Bromine (Br)
Explanation:
Im assuming thats the answer you are looking for since you didnt include any options :,)
paragraph about what has caused co2 levels to rise / will give brainliest
Answer: We may only emit about 4% of total emissions, while the natural environment emits the other 96%. But the thing is the natural environment adds and takes out CO2 from the system in roughly equal amounts (at least in the short and medium term). We only add it. We are adding so much of it that the environment can only absorb about half of it, thus the rapid increase in CO2 levels, thus the rapid increase in temperatures.
Explanation:
Which substance is a mixture of two or more metals?.
The substance which is mixture of two or more than two metals is called as alloy. Alloy is metallic mixture of any elements.
What is alloy ?Alloy is the mixture of two or more than two metal . This mixture may be homogenous or heterogenous ,in both of the phase alloy mixture occur. It may be solid or mixture of many phases.
Alloy are classified into two parts i.e. substitutional alloy and interstitial alloy. An example of alloy is red gold which is the mixture of copper and gold. and there is mixture of silver and gold to make an alloy.
There are different types of alloy present in environment like nickel alloy, zinc alloy, bronze alloy , stainless steel alloy. I an alloy contain ferrous metal it will be rust.
Thus, Alloy is the mixture of two or more than two elements.
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where do most of the elements on the periodic table come from?
Stars
All the elements on earth have been cooked from billions of years in stars and the released in the universe through super-nova explosions
What are the formulas to go back and forth from concentration to pH?
Answer:
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+].
Explanation:
What is the function of the seed in the plant? can’t copy and paste what the internet has
Answer:
Seed is the actual medium of reproduction in plants. It could be considered as the result of gametic stage of reproduction producing the basic and fundamental prototype of the parent plant called embryo covered inside a hard protective coat I.e. testa
I read this in 6th std
Aeronautical researchers have developed three different processes to pack a parachute. They want to compare the different processes in terms of time to deploy and reliability. There are 1,200 objects that they can drop with a parachute from a plane. Using a table of random digits, the researchers will randomly place the 1,200 items into three equally sized treatment groups suitable for comparison.
Which design is the most appropriate for this experiment?
Randomly number each item with 1, 2, or 3. Assign the items labeled 1 to the process 1 group, assign the items labeled 2 to the process 2 group, and assign the items labeled 3 to the process 3 group.
Number each item from 1 to 1,200. Reading from left to right from a table of random digits, identify 800 unique numbers from 1 to 1,200. Assign the items with labels in the first 400 numbers to the process 1 group. Assign the items with labels in the second 400 numbers to the process 2 group. Assign the remaining items to the process 3 group.
Number each item from 0000 to 1199. Reading from left to right on a random number table, identify 800 unique four-digit numbers from 0000 to 1199. Assign the items with labels in the first 400 numbers to the process 1 group. Assign the items with labels in the second 400 numbers to the process 2 group. Assign the remaining items to the process 3 group.
Select an item, and identify the first digit reading from left to right on a random number table. If the first digit is a 1, 2, or 3, assign the item to the process 1 group. If the first digit is a 4, 5, or 6, assign the item to the process 2 group. If the first digit is a 7, 8, or 9, assign the item to the process 3 group. If the first digit is a 0, skip that digit and move to the next one to assign the item to a group. Repeat this process for each item.
The best design for this experiment is to number the items from 1 to 1,200 and then choose random numbers in the table of random digits (second option).
How to use a table of random digits?These tables are used to randomly assign items or subjects into groups when experimenting. The best way to use these tables are:
Give each item or participant a number.Take a lot at the table and choose a number.If this number is the same that the number assigned to an item or participant classify it in the first group.Keep selecting.Based on this, for this experiment the steps are:
Number the items from 1 to 1,200. Identify numvers in the table.Assign the first 400 items to the process 1 group. Repeat the process for the other two groups.Learn more about experiments in: https://brainly.com/question/11256472
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Answer:
b. Number each item from 1 to 1,200. Reading from left to right from a table of random digits, identify 800 unique numbers from 1 to 1,200. Assign the items with labels in the first 400 numbers to the process 1 group. Assign the items with labels in the second 400 numbers to the process 2 group. Assign the remaining items to the process 3 group.
Explanation:
Statistics A edg. 2023
A stock solution is made by dissolving 66.05 g of (nh4)2so4 in enough water to make 250 ml of solution. a 10.0 ml sample of this solution is then diluted to 50.0 ml. given that the molar mass of (nh4)2so4 is 132.1 g/mol, what is the concentration of the new solution? use m subscript i v subscript i equals m subscript f v subscript f. and molarity equals startfraction moles of solute over liters of solution endfraction.. 0.400 m 1.60 m 5.00 m 10.0 m
The concentration of the new solution of the ammonium sulphate, (NH₄)₂SO₄ given the data is 0.4 M
How to determine the mole of (NH₄)₂SO₄Mass of (NH₄)₂SO₄ = 66.05 gMolar mass of (NH₄)₂SO₄ = 132.1 g/mol Mole of (NH₄)₂SO₄ =?Mole = mass / molar mass
Mole of (NH₄)₂SO₄ = 66.05 / 132.1
Mole of (NH₄)₂SO₄ = 0.5 mole
How to determine the molarity of (NH₄)₂SO₄Mole of (NH₄)₂SO₄ = 0.5 mole Volume = 250 mL = 250 / 1000 = 0.25 L Molarity of (NH₄)₂SO₄ =?Molarity = mole / Volume
Molarity of (NH₄)₂SO₄ = 0.5 / 0.25
Molarity of (NH₄)₂SO₄ = 2 M
How to determine the molarity of the diluted solution Volume of stock solution (V₁) = 10 mL Molarity of stock solution (M₁) = 2 MVolume of diluted solution (V₂) = 50 mLMolarity of diluted solution (M₂) =?M₁V₁ = M₂V₂
2 × 10 = M₂ × 50
20 = V₂ × 50
Divide both side by 50
M₂ = 20 / 50
M₂ = 0.4 M
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Answer:
A: 0.400 M
Explanation:
What type of sugar is characterized as best for meringue and some cakes because it dissolves more easily?
Answer:
granulated sugar
Explanation:
the rate of dissolving can be increased by mixing stirring and agitating the
solution. hope this answers your question
Name these compounds according to IUPAC.
The IUPAC names of the compound 8 is propional and compound 9 is propanone or ethyl methyl ketone.
What is IUPAC name?International Union of Pure and Applied Chemistry, IUPAC, is naming of the organic compound by the rules of chemistry.
There are some rules, like identifying the functional group, to find the longest carbon chain.
Thus, the IUPAC names of the compound 8 is propional and compound 9 is propanone or ethyl methyl ketone.
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What is [tex]K_c[/tex] for the following equilibrium concentration of each substance is :
[tex]2SO_2(g)+O_2\rightleftharpoons2SO_3(g)[/tex]
As per the question ,
[tex]2SO_2(g)+O_2\rightleftharpoons2SO_3(g) [/tex] (given)
[tex]\: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
[tex]K_c = \frac{[SO_3]^2}{[SO_2]^2[O_2]}[/tex]
[tex]\: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
[tex] \: \: \: \: \: = \frac{ ( 1.9)^2M^2}{(0.6)^2(0.82)M^3} [/tex]
[tex]\: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
[tex] \: \: \: \: = 12.229 M^{ - 1}[/tex] (approximately)
[tex]\: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
Hence , K for the equilibrium is [tex]12.229M^{-1}[/tex]
