Answer:
$55.998
Explanation:
Given data:
Total yard in blanket = 1531 yard
Price of 2.00×10² m = $7.99
Total cost for blanket = ?
Solution:
As it is given in question that,
1 yard = 0.9144 m
1531 × 0.9144 m = 1399.95 m
Total number of meters = 1399.95 m
Price of 2.00×10²(200) m = $7.99
Cost of one meter:
$7.99 / 200m = 1 m / x
x = $0.04
Now we will calculate the price of 1531 yard,
1399.95 m × $0.04 / 1m = $55.998
To make the blanket requiring 1531 yards of yarn using a speciality yarn sold in 200 meter hanks priced at $7.99 each, it would cost $55.93 after converting yards to meters and calculating the number of hanks needed.
The cost of making a blanket using the given yarn, we need to convert the required yarn from yards to meters to match the unit in which the speciality yarn is sold. Then, we can determine how many hanks of yarn are needed and calculate the total cost.
Conversion of Yards to Meters
Firstly, we convert the needed yarn for the blanket from yards to meters using the conversion factor 1 yard = 0.9144 meters.
1531 yards * 0.9144 meters/yard = 1400.0844 meters
Calculating the Number of Hanks Needed
Now, we calculate how many 2.00 x 102 meter hanks are required:
1400.0844 meters / (2.00 x 102 meters/hank) = 7 hanks (rounding up since you can't purchase a fraction of a hank)
Total Cost Calculation
Finally, the total cost is:
7 hanks * $7.99/hank = $55.93
Therefore, it would cost $55.93 to make the blanket out of this speciality yarn.
12. Penny can knit 4 rows of a sweater in 5
minutes. How many hours will it take her
to knit 300 rows?
Answer:
6.25 hours
Explanation:
From the question;
Penny can knit 4 rows in 5 minutesWe need to determine the time it will take for her to knit 300 rows
4 rows = 5 minutes
300 rows = ?
= (300 × 5 ) ÷ 4
= 375 minutes
But, 1 hour = 60 minutes
Therefore;
= 375 ÷ 60
= 6.25 hours
Thus, it will take penny 6.25 hours to knit 300 rows
It will take her 6.25 hours to knit 300 rows.
Given:
Penny can knit 4 rows in 5 minutes
4 rows = 5 minutes
To find:
Time for knitting 300 rows=?
Calculation for time:Time = (300 × 5 ) ÷ 4
Time = 375 minutes
As we know, 1 hour = 60 minutes
Thus,
Time= 375 ÷ 60
Time= 6.25 hours
So, it will take 6.25 hours to knit 300 rows.
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The total resistance in this circuit is
ohms.
The battery voltmeter should read
volts.
Explanation:
In the given figure we need to find the total resistance and total voltage .
We know that :
In series total R =R1 +R2 ...In parallel total R formula is : 1/R=1/R1 +1/R2.....We also know ohm's formula is : V=IRSo, in this circuit : R1=12 ohm
R2=8 ohm
R3=10 ohm
Ammeter reading = 10A
so, they are in series therefore ,
Total R = R1 + R2 +R3
R=12 +10+8=30 ohm
To find voltage we have : V=IR
V =10 x 30=300Volts
Answer:
The total resistance in this circuit is 30 ohms.
The battery voltmeter should read 300 volts.
Explanation:
I got it right. hope this helps !! :DD
What is the balanced product of Ba(CN)2+(NH4)2SO4
Answer: Ba(CN)2 + (NH4)2SO4 => BaSO4 + 2 NH4CN
Explanation: The reaction will produce BaSO4 Barium sulfate and NH4CN Ammonium cyanide.
Which factor MOST directly affects the flow of ocean currents?w of ocean currents?
The flow of ocean currents is most directly affected by winds, with the Coriolis Effect also playing a significant role. Other factors like seawater density, affected by temperature and salinity, as well as geographical features and the conservation of potential vorticity, also influence current patterns.
The factor that most directly affects the flow of ocean currents is the wind. Surface ocean currents are primarily driven by prevailing winds, which are influenced by global weather patterns and the Earth's rotation, an effect known as the Coriolis Effect. These currents are responsible for transporting heat from tropical regions towards higher latitudes and affect regional weather cycles.
Moreover, the density of seawater, determined by temperature and salinity, influences the movement of deep ocean currents, known as thermohaline circulation. Changes in the water's density, such as from melting ice caps and warming surface waters, can disrupt this circulation and impact climate and weather patterns globally, which is part of the larger Global Conveyor Belt system.
Another aspect is the geographical configuration of coastlines and the seafloor, which can lead to the creation of unique patterns such as gyres and eddies. These physical features can redirect the flow of currents and lead to the convergence or divergence of water masses.
Moreover, the vorticity of water, which is a measure of the local rotation at a certain point in the fluid, can influence ocean currents through mechanisms like the conservation of potential vorticity and the interplay with underwater landscapes.
Overall, while winds are the primary driver of surface currents, the interplay of multiple factors such as the Earth's rotation, temperature, salinity, geological features, and vorticity all contribute to the complex flow patterns of ocean currents.
The correct answer is B differences in temperature is the factor that MOST directly affects the flow of ocean currents.
The temperature variations are the most fundamental factor that sets the ocean in motion, creating density differences and driving the circulation patterns that we see as ocean currents.
The other option is incorrect:
Option A is wrong because Differences in pressure: While pressure differences can influence currents, they are often a result of temperature variations.
Option C is wrong because Earth's revolution round the Sun: Earth's revolution does have some influence on tides and ocean movements, but its effect on overall current flow is less direct.
Option D is wrong because The Moon's revolution round Earth: the Moon's gravity plays a major role in tides, but its influence on overall current flow is less significant compared to temperature variations.
The complete question is
Which factor MOST directly affects the flow of ocean currents?
A) differences in pressure
B) differences in temperature
C) Earth's revolution round the Sun
D) The Moon's revolution round Earth
What is the correct answer?
Answer:
Bleach and seawater are identified wrong.
Explanation:
Acids have an pH that is lower than 7 and bases have a pH of higher than 7 and (pH 7 is neutral)
We can observe from the table that bleach has a pH of 13 which is higher than 7 and shows basic characteristics
As for seawater the table shows it has a pH of 8 which is also a base. Therefore the answer is 3rd option "Bleach and seawater should be identified as bases".
how many moles of aluminum atoms are in one aluminum can
How do you distinguish a chemical change from a physical change
Answer:
One distinguishing feature between physical and chemical changes is that a physical change can be reverse or turn back to its original form, but chemical change cannot be return to its form because the material change.
Explanation:
2. What's the kinetic energy of an object that has a mass of 12 kilograms and moves with a velocity of 10 m/s?
Explanation:
Energy
It is ability to do work .
There are so many forms of energy .
out of which mechanical energy is also one of the form .
Mechanical energy
It is the energy possessed by the body by virtue of its motion and state .
It is of two types :
Kinetic energy Potential energyKinetic energy
It is the energy possessed by the body by virtue of its motion .
Its expression is :
K.E=1/2mv²
Here in above question it is given that :
mass = 2Kg
V=10m/sec
K.E will be = 1/2 x 2 x 10 x 10
K.E=100 J
if Gregory starts with 2.5 grams of CuO, how many grams of N2 can he theoretically form?
Answer:
0.2934 g of N₂
Explanation:
The balance chemical equation for given reaction is as follow;
2 NH₃ + 3 CuO → 3 Cu + N₂ + 3 H₂O
Step 1: Calculate Moles of CuO as;
Moles = Mass / M.Mass
Moles = 2.5 g / 79.54 g/mol
Moles = 0.0314 moles of CuO
Step 2: Find out moles of N₂ as;
According to equation,
3 moles of CuO produced = 1 mole of N₂
So,
0.0314 moles of CuO will produce = X moles of N₂
Solving for X,
X = 0.0314 mol × 1 mol / 3 mol
X = 0.0104 moles of N₂
Step 3: Calculate Mass of N₂ as;
Mass = Moles × M.Mass
Mass = 0.0104 mol × 28.01 g/mol
Mass = 0.2934 g of N₂
Which statement is correct?
.
O
The volume of 1 mol of CO2 is greater than that of 2 mol of Oz.
The volume of 1 mol of CO2 is greater than that of 1 mol of Nz.
The volumes of 2 mol of O2 and 1 mol of N, gases are the same.
The volumes of 1 mol of CO2 and 1 mol of N, gases are the same.
Answer:
The volumes of 1 mol of CO2 and 1 mol of N2, gases are the same.
Explanation:
1 mole of a gas occupy 22.4L at stp. This is true for all gases. So,
1mol of CO2 = 22.4L
1mole of N2 = 22.4L
From the above illustration, 1mole of CO2 and 1mole N2 have the same volume at stp
Answer: The volumes of 1 mol of CO2 and 1 mol of N, gases are the same.
Explanation:
Percentage Yield
The idea here is to determine how much product should be formed, given the amount of limiting
reactant and the balanced equation. Then you run the reaction and weigh how much was really
formed Divide the real by the ideal, multiply by 100, and you have the % yield.
So let's suppose you are making calcium oxide by decomposing calcium carbonate:
You have 20.0 g of Caco. You decompose it by heat, and weigh the calcium oxide that
remains. You have 10.3 grams. What is the % yield?
A) always write a balanced equation first:
B) then look at the mole relationship of reactant and product
C) then calculate the number of grams of product (Cao) you should get.
D) divide real by predicted amount and multiply by 100. Make sure it makes sense.
Sample problem: A student makes sodium chloride by buming 2.3 grams of sodium in chlorine
gas. If the yield is 90%, how much sodium chloride is made?
Problem 2: For the chemical reaction Mg(s) + 2 HCl(aq) - H, (9) + MgC1, (aq), calculate the
% vield if 100. Grams of magnesium react with excess HCl to produce 310 grams of MgCl,
Q.No. 1:
You have 20.0 g of CaCO₃. You decompose it by heat, and weigh the calcium oxide that remains. You have 10.3 grams. What is the % yield?
Answer:
%age Yield = 92.37 %
Solution:
The balance chemical equation for given decomposition reaction is;
CaCO₃ → CaO + CO₂
Step 1: Calculate Moles of CaCO₃:
Moles = Mass / M.Mass
Moles = 20.0 g / 100.08 g/mol
Moles = 0.199 moles of CaCO₃
Step 2: Calculate theoretical amount of CaO produced;
According to equation,
1 moles of CaCO₃ produced = 1 mole of CaO
So,
0.199 moles of CaCO₃ will produce = X moles of CaO
Solving for X,
X = 0.199 mol × 1 mol / 1 mol
X = 0.199 mol of CaO
Also,
Mass = Moles × M.Mass
Mass = 0.199 mol × 56.07 g/mol
Mass = 11.15 g of CaO
Step 3: Calculate %age Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
%age Yield = 10.3 g / 11.15 g × 100
%age Yield = 92.37 %
___________________________________________
Q.No. 2:
A student makes sodium chloride by buming 2.3 grams of sodium in chlorine gas. If the yield is 90%, how much sodium chloride is made?
Answer:
Actual Yield = 5.785 g of NaCl
Solution:
The balance chemical equation for given decomposition reaction is;
2 Na + Cl₂ → 2 NaCl
Step 1: Calculate Moles of Na:
Moles = Mass / M.Mass
Moles = 2.3 g / 23 g/mol
Moles = 0.10 moles of Na
Step 2: Calculate theoretical amount of NaCl produced;
According to equation,
2 moles of Na produced = 2 moles of NaCl
So,
0.10 moles of Na will produce = X moles of NaCl
Solving for X,
X = 0.10 mol × 2 mol / 2 mol
X = 0.10 mol of NaCl
Also,
Mass = Moles × M.Mass
Mass = 0.10 mol × 58.44 g/mol
Mass = 5.844 g of NaCl
Step 3: Calculate Actual Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
Or,
Actual Yield = %age Yield × Theoretical Yield ÷ 100
Actual Yield = 99 × 5.844 g ÷ 100
Actual Yield = 5.785 g of NaCl
___________________________________________
Q.No. 3:
For the chemical reaction Mg(s) + 2 HCl (aq) → H₂ (g) + MgCl₂ (aq) calculate the % yield if 100 grams of magnesium react with excess HCl to produce 310 grams of MgCl₂.
Answer:
%age Yield = 79.13 %
Solution:
The balance chemical equation for given decomposition reaction is;
Mg + 2 HCl → MgCl₂ + H₂
Step 1: Calculate Moles of Mg:
Moles = Mass / M.Mass
Moles = 100 g / 24.30 g/mol
Moles = 4.11 moles of Mg
Step 2: Calculate theoretical amount of MgCl₂ produced;
According to equation,
1 mole of Mg produced = 1 mole of MgCl₂
So,
4.11 moles of Mg will produce = X moles of MgCl₂
Solving for X,
X = 4.11 mol × 1 mol / 1 mol
X = 4.11 mol of MgCl₂
Also,
Mass = Moles × M.Mass
Mass = 4.11 mol × 95.21 g/mol
Mass = 391.73 g of MgCl₂
Step 3: Calculate %age Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
%age Yield = 310.0 g / 391.73 g × 100
%age Yield = 79.13 %
how does freezing affect the volume of water?
Answer:When frozen, water molecules take a more defined shape and arrange themselves in six-sided crystalline structures. The crystalline arrangement is less dense than that of the molecules in liquid form which makes the ice less dense than the liquid water. When water freezes, the volume expands by approximately 9%.
Explanation:
Circle the term or phrase in parentheses that makes each statement true.
• 1. A substance that produces hydrogen ions in solution is (an acid, a base).
Is it an acid or a base
Answer:
A substance that produces hydrogen ions in solution is AN ACID.
Explanation:
Question 5 (1 point)
Your television converts
energy into ___
____ and sound energy.
chemical, electrical
Olight, electrical
O
electrical, light
O heat, light
Answer:
(a bit of heat) and light
Explanation:
it has the resistance in it so it will give heat when surpassed by a high tension
How can crossing over lead to the expression Of new traits
Answer:
Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
Explanation:
What is Crossing over?
Crossing over, or recombination, is the exchange of chromosome segments between non-sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.How can crossing over lead to the expression of new traits?
During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material. Gametes gain the ability to be genetically different from their neighboring gametes after crossing over occurs.Due to crossing over, the genetic recombination, the offspring have a different set of alleles and genes than their parents do.Learn more:
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In two or more complete sentences explain how to balance the chemical equation,
Ca + N2 ⟶ Ca3 + N2 and include all steps.
The balanced reaction is 3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s ).
Explanation:
A chemical equation is said to be balanced when the total number of atoms present on the reactants side is equal to the total number of atoms present on the product side.
The unbalanced chemical equation is as follows,
Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
To balance this equation, you need to look at how many atoms of each element are present on each side of the chemical equation.
Calcium has 1 atom on the reactant and 3 on the products side. To balance the reaction we need to multiply the calcium atom by 3 on the reactants side.
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
Now Nitrogen has a coefficient of 2 on both sides of the reaction. Hence the balanced chemical equation will thus be
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
PLEASE ANSWER
Based on the chart below order each of the substances according to how fast sound waves would travel through them (1 fastest- 5 slowest):
Answer: fastest through steel
Explanation:
Sound waves travel fastest through solids, basically the one with the most density.
So fastest through steel
Then Al
Then water
Then ethanol
Then air
Which of the following cells is formed by meiosis?
A.a bacterial cell
B. A egg cell
C. A stem cell
D a brain cell
Answer:
it could be a B. egg cell or C. A stem cell but im pretty sure the answer is egg cell
hopes it helps!
The cell which is formed by the process of Meiosis is called as an egg cell. The correct option is B.
What is Meiosis?Meiosis is a type of cell division that produces four daughter cells, each with half the number of chromosomes as the original cell. This process is essential for sexual reproduction, where haploid gametes, such as egg and sperm cells, are produced. Meiosis is called as reductional division type of cell division.
Through the process of Meiosis, four daughter cells are formed which are not exactly same or identical to the parent cell.
Bacterial cells do not undergo meiosis as they reproduce asexually through binary fission. Stem cells and brain cells are also not formed by meiosis but by mitosis, a type of cell division that produces identical daughter cells with the same number of chromosomes as the original cell.
Therefore, the correct option is B.
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Using the equation below, calculate the number of grams of CO that can react completely with 78.9 g Fe2O3
Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)
Answer:
41.51 g of CO
Explanation:
The balance chemical equation for given double displacement reaction is,
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Step 1: Calculate moles of Fe₂O₃:
Moles = Mass / M.Mass
Moles = 78.9 g / 159.68 g/mol
Moles = 0.494 moles
Step 2: Calculate moles of CO:
According to equation,
1 mole of Fe₂O₃ reacted with = 3 moles of CO
so,
0.494 moles of Fe₂O₃ will react with = X moles of CO
Solving for X,
X = 0.494 mol × 3 mol ÷ 1 mol
X = 1.482 moles of CO
Step 3: Calculate Mass of CO as:
Mass = Moles × M.Mass
Mass = 1.482 mol × 28.01 g/mol
Mass = 41.51 g of CO
Describe the electrochemical series and why it’s important in understanding metals.
Answer:
The electrochemical series is an arrangement of metals in such order that any metal in the list is displaced from its compounds by any metal above it, but displaces any metal below it. The higher up the list a metal is, the greater its activity. Knowing a metal’s placement on this chart can help you understand the activity of the metal, especially in regard to its ability to displace hydrogen in acids. Any items on the list far above hydrogen will do a good job at displacing it, those near it won’t do such a good job, and those below it won’t displace it from acids at all.
Explanation:
I got this answer straight from Penn foster.
Electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
Electrochemical series has been the arrangement of the metals in the order of decreasing order of the reactivity. The arrangement has been mediated in the metals arranged above are more reactive and able to displace the lower metals in the series.
The electrochemical series has been important for understanding metals as for the reaction, the compound formed and most reactive compound has been determined easily.
Thus, electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
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How many moles of O2 will be produced if you react 6 moles of KCIO3 ?
Answer:
12
Explanation:
2x6
Answer: 18 moles
Explanation:
in order to find that u need to take the coefficents of each of the compounds. that gives a ratio of 2:3.
now we find out how many each unit is: 2x = 12x = 6
now, we multiply it by 3 to find the number of moles of O23(6) = 18 mol O2.
Select the correct statement to describe when a sample of water vapor condenses into liquid water.
Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined Temperature decreases, molecular motion increases, volume decreases, and shape becomes less defined Temperature increases, molecular motion decreases, volume decreases, and shape becomes less defined Temperature decreases, molecular motion increases, volume increases, and shape becomes more defined
Answer:
Explanation:
Final answer:
When water vapor condenses into liquid water, A) Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined compared to the gas.
Explanation:
The correct statement to describe when a sample of water vapor condenses into liquid water is A) Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined. When water vapor cools down, the molecules lose kinetic energy and move less vigorously, which allows them to come closer together and form liquid water, a process known as condensation. This is also associated with a decrease in volume since the molecules are now more closely packed than they were in the gaseous state. Additionally, the shape becomes more defined because liquids have a definite volume but no definite shape, conforming to the shape of their container, unlike gases that fill the entire space available to them.
Solar energy received by the Earth's surface causes the Earth's surface to heat up during the day. Which of the following heat transfer mechanisms is the main cause of the surface gaining heat? A. radiation B. convection C. conduction D. advection
Answer:
radiation
Explanation:
When humans burn fuel or
cut down trees, they (increase/decrease)
levels of carbon dioxide in the atmosphere.
Answer:
when humans burn fuel or cut down trees , the increase level of carbon dioxide in the atmosphere
Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm^3, what is the sample’s volume
Answer:
v = 10 cm³
Explanation:
Given data:
Mass of sample = 80 g
Density of sample = 8 g/cm³
Volume of sample = ?
Solution:
We will calculate the volume by rearranging the density formula,
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
d =m/v
d = density
m =mass
v = m/d
Now we will put the values in formula,
v = 80 g / 8 g/cm³
v = 10 cm³
Large crystals are formed when _____. igneous rocks cool very quickly metamorphic rocks change into igneous rock sedimentary rock is eroded igneous rocks cool very slowly
Large crystals are formed when igneous rocks cool very slowly.
Answer:
igneous rocks cool very slowly
Explanation:
Hope this helps√
What is the valency of CH3COO
Answer:
The valency is 1.
Explanation:
How much heat is required change the temperature of 167 g of ice from -20.0 oC to -5.0 oC? (c= 2.093 J/goC for ice)
Answer: 5,242 J
Explanation:
Step by step:
The formula for this is Q=mcΔT
Find out your values and then plug-and-play.
Q= unknown (energy amt we need to find out)
m= 167g
c= 2.093 J/go°C
ΔT= -20.0° + 15° would give you -5.0°
Plug into the equation for Q=(167g)(2.093 J/g°C)(15°C).
Solve and you get 5,242 J.
hope this helps!!
The heat required to change the temperature of 167 g of ice from -20.0 °C to -5.0 °C is approximately 5246.2 Joules.
Explanation:To find the amount of heat required to change the temperature of an object, we use the formula:
q = mcΔT
where:
- q is the heat energy (in joules),
- m is the mass of the substance (in grams),
- c is the specific heat capacity of the substance (in J/g°C), and
- ΔT is the change in temperature (in °C).
Here, the mass of the ice (m) is 167 g, the specific heat capacity of ice (c) is 2.093 J/g°C, and the change in temperature (ΔT) is -5.0°C - (-20.0°C) = 15.0°C.
Substitute the values into the formula:
q = (167 g)(2.093 J/g°C)(15.0°C) = 5246.205 J
Therefore, the heat required is about 5246.2 Joules.
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What do all forms of electromagnetic radiation have in common?
A. Their strength in the atmosphere
B. Their frequency
C. Their wavelength
D. Their speed in a vacuum
Answer:
D. Their speed
All forms of electromagnetic radiation, regardless of their differences in frequencies and wavelengths, share the common quality of having the same speed in a vacuum, which is approximately 3.00 x 10^8 meters per second.
Explanation:All forms of electromagnetic radiation, regardless of their different frequencies or wavelengths, share one common quality: their speed in a vacuum. When traveling through a vacuum, all electromagnetic waves move at the constant speed of about 299,792 kilometres per second (or equivalently, about 186,282 miles p/s), commonly approximated as 3.00 x 10^8 meters per second. This trait applies to all kinds of electromagnetic radiation, including visible light, X-rays, microwaves, and radio waves.
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-brass cap
-bitumen (pitch)
-carbon and manganese oxide
-carbon rod
-ammonium chloride
-zinc case
Classify all of the substances named as an element, compound or a mixture
Element
=
Compound
=
Mixture
=
Answer:
Element:
Zinc case
Carbon rod
Compound:
Bitumen
ammonium chloride
Mixture:
Brass cap
carbon and manganese oxide
Explanation:
Elements are considered as pure substances that are made up of only one atom. A zinc case is made up of the metal zinc, which has a negative electrical polarity, that works as the anode in a battery. The carbon rod is also a component you can find in a battery that serves as the cathode.
Compounds are pure substances as well that are made up of two or more atoms chemically bonded. They cannot be separated through physical means. Examples would be bitumen (pitch) which is a hydrocarbon. Ammonium chloride, is an inorganic compound. It is a salt that can be used as a diuretic.
Mixtures are made up of two or more substances or solutions. They are not chemically bonded, so that means that there are physical ways to separate them. A brass cap is a mixture of different metals, specifically zinc and copper.
Carbon and manganese is a powdered mixture that can be found inside a battery or a dry cell as well. When the battery is powered up, this mixture is then converted into a compound called manganese dioxide.