Answer:
The mass of copper piece is 44.8 grams
Explanation:
Density is defined as amount of mass present in the unit volume of the substance.
Mathematically written as:
[tex]\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}[/tex]
We are given:
Density of copper, d =[tex]8.96 g/cm^3[/tex]
Mass of copper piece = M
Volume of the copper piece = V = [tex] 5.0 cm^3[/tex]
Putting values in above equation, we get:
[tex]8.96 g/cm^3=\frac{M}{ 5.0 cm^3}[/tex]
[tex]M=8.96 g/cm^3\times 5.0cm^3=44.8 g[/tex]
Hence, the mass of copper piece is 44.8 grams
is the equation 2C2H2+5O2=4CO2+2H20 A BALANCED EQUATION
If 1.98 moles of C are reacted with an excess of Cu2O how many moles of CO would be produced? moles
Using the balanced chemical equation 2C + Cu2O → 2CO + 2Cu, it can be determined that 1.98 moles of carbon will produce 1.98 moles of carbon monoxide (CO) when reacting with an excess of copper(I) oxide.
Explanation:The subject of this question is Chemistry, specifically dealing with stoichiometry which involves the calculation of the amounts of reactants and products in chemical reactions. Given that 1.98 moles of carbon (C) react with an excess of copper(I) oxide (Cu2O), we need to know the balanced chemical equation to find the amount of carbon monoxide (CO) produced.
The chemical equation for the reaction between carbon and copper(I) oxide to produce carbon monoxide and copper would be:
2C + Cu2O → 2CO + 2Cu
From this balanced equation, we can see that 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we start with 1.98 moles of carbon, we will also produce 1.98 moles of CO, since the ratio of carbon to carbon monoxide is 1:1.
When 1.98 moles of C are reacted with an excess of Cu2O, it would produce 1.98 moles of CO assuming the reaction follows the stoichiometry of 2 moles of C producing 2 moles of CO.
Explanation:If 1.98 moles of C are reacted with an excess of Cu2O, the number of moles of CO produced can be determined by using stoichiometry and the balanced chemical equation for the reaction. Unfortunately, the actual balanced chemical equation is not provided in the question. However, a typical reaction between carbon and copper (I) oxide might look like this:
2C(s) + Cu2O(s) → 2CO(g) + Cu(s)
According to this balanced equation, 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we have 1.98 moles of carbon, it would produce 1.98 moles of CO, assuming carbon is the limiting reactant and since there's an excess of Cu2O.
Classify these elements by whether they get oxidized or reduced in the reactions shown here: 2Ca(s)+ O 2 (g) F 2 (g)+2Li(s) → → 2CaO(s) 2LiF(s
Calcium and lithium are oxidized and Florine and oxygen are reduced.
What are oxidizing agent?Oxidizing agent are defined as a substance or component that participates in an oxidation-reduction reaction and receives electrons from a separate species. The oxidizing agent, often referred to as the electron acceptor, is typically in one of its higher oxidation states since it will receive electrons and be reduced.
Reducing agent are defined as a reactant in an oxidation-reduction reaction that decreases another reactant by discharging electrons to that reactant. Reducing one's consumption of energy-dense foods and canceling undesired magazine subscriptions are two examples. Another example of reduction is to turn off the water when brushing your teeth rather than letting it run the full two minutes.
Thus, calcium and lithium are oxidized and Florine and oxygen are reduced.
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Two hundred grams of a substance requires 0.52 kJ of heat to raise its temperature from 25°C to 45°C. Use the table to identify the substance. q = mC▲T. Mass (m) is in grams. Temperature is in degrees Celsius.
Substance: Specific Heat (C) in joules per gram/degrees centigrade:
Water (ice) 2.05
Iron 0.46
Aluminium 0.90
Gold 0.13
Copper 0.39
Ammonia (liquid) 4.70
Ethanol 2.44
Gasoline 2.22
Water (liquid) 4.18
Water (vapor) 2.08
Air (25 degrees Celsius) 1.01
Oxygen 0.92
Hydrogen 14.30
Question options:
water
gasoline
ammonia
gold
Answer:gold
Explanation:
Planetesimal definition
What was the hiker's average velocity during part B of the hike? In Part A, a hiker travels four kilometers east from nine to nine-forty-five a.m. In Part B, a hiker travels six kilometers south from nine-forty-five to ten-forty-five a.m. In Part C, a hiker travels four kilometers west from ten-forty-five to eleven-fifteen a.m. In Part D, a hiker travels six kilometers north from eleven-fifteen a.m. to twelve p.m.
You have this in Chemistry. It should be in physics, but never mind that.
A
d = 4 km due east. See note for part B.
t = 45 minutes = 3/4 hour
v = ??
d = v * t
4 = v * (3/4)
v = 4/(3/4) = 4 * 4/3 = 16/3 = 5 1/3
So his rate of travel is 5 1/3 km/hr due east. If you do not give the direction when it says velocity, you are wrong. Velocity has direction.
B
10 45 to 11 45 is 1 hour.
d = v * t
d = 6 km due south (this is actually a displacement which also has direction).
t = 1 hour
6 = v * (1)
6/(1) = v
6/(1) = v
v = 1 km/ hr due south
Why is it not a good idea to use a stopper when combining two unknown substances in test?
If a light bulb is missing or Broken in a parallel circuit,will the other bulb light
Which of the following elements is the most reactive?
Chlorine
Bromine
Fluorine
Helium
Answer:
Fluorine is the most reactive element in this list
Explanation:
what kind of tide does the observer experience when he is between tidal bulges?
The force that slows down and eventually stops a ball you roll across the pavement is called A) kinetic force. B) friction force. C) the slow force. D) potential force.
The ball stops moving because of friction force. Friction is the force that opposes all motion. Therefore, the answer is friction force...
Answer:
friction
Explanation:
took test
which of the following is not an example of a music parameter
Answer:
Fragmentation
Explanation:
APEX
During a phase change the temperature of a substance
Answer:
remains constant
What unit of time on Earth is based on the rotation of the Earth? A. month B. day C. year D. hour
What has cells that are dried out?
2. What charge does an electron have? a. Positive b. Negative c. Neutral d. No charge
1.the water on the surface of the earth
2. a solution that will conduct an electric current
3. process used by plants to make simple sugars and starches
4. process used to produce fresh water from saline
photosynthesis
desalination
hydropshere
electrolyte
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PLEASE HELP ME!?!?! What technology did scientists use in the mid-1900s to map the mid-ocean ridge
How many atoms are in 5.03 moles of silicon dioxide
Which of the following is a true statement about heat transfer through conduction, convection, or radiation? A. Heat ALWAYS flows from warmer objects to cooler objects. B. Heat is NOT related to temperature differences. C. Heat NEVER travels in a similar pattern. D. Heat ALWAYS flows from cooler objects to warmer objects.
Answer: Option (A) is the correct answer.
Explanation:
When we place two objects of different temperature adjacent to each other then there will occur transfer of heat from hotter object to colder object till their temperature becomes equal.
This process is known as conduction.
For example, a metal spoon placed in hot coffee cup then heat will flow from coffee to the cup.
Convection is defined as the process in which a fluid (liquid or gas) when heated then more dense (cooler) substance sinks ate the bottom whereas less dense (hotter) substance will rises at the top.
This intermixing of the substances tends to generate convection currents and this process is known as convection.
Radiation is defined as an electromagnetic energy which travels in space in the form of waves or particles.
This means that heat energy will always travel from a warmer object to a colder object.
Thus, we can conclude that heat ALWAYS flows from warmer objects to cooler objects, is a true statement about heat transfer through conduction, convection, or radiation.
The statement 'heat ALWAYS flows from warmer objects to cooler objects' is TRUE about heat transfer through conduction, convection, or radiation (Option A).
Heat transfer refers to the field that studies how heat is generated, converted, and exchanged between different physical objects.When two different materials that have different temperatures enter in contact, the heat is always transferred from the warmer to the cooler.This principle about heat transfer can also be applied when two objects/materials are mixed.In conclusion, the statement 'heat ALWAYS flows from warmer objects to cooler objects' is TRUE about heat transfer through conduction, convection, or radiation (Option A).
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which two factors determine sound intensity
Factors that determine
sound intensity are amplitude and the distance.
Amplitude
Amplitude depends on the starting energy of the sound wave. If the amplitude is high
then the intensity will be high.
Distance
Distance is the measure of how far does the sound wave travel
from its source. If the distance is high then the intensity will be low.
The force produced by the pull of the earth's gravity on an object is called what?
yeah weight is the answer
Organisms that can survive well in conditions with changing salinity are well adapted to live in _____.
A) An internal zone
B) The abyssal or deep ocean
C) The pelagic zone
D) Zones with high density
Why do submarines have to be built with such strong, thick walls, compared to ships? Explain in as much detail as you can using ideas about water pressure.
How does the potential energy of an object change as its distance from the ground changes?
You notice that heat is released during a chemical reaction. This reaction is a(n) _______ reaction.
The temperature of an object is directly related to A. the volume of the object. B. the motion of its particles. C. the potential energy of its chemical bonds. D. the mass of the object.
Answer: Option (B) is the correct answer.
Explanation:
In a solid object, molecules are closely packed together due to strong intermolecular forces between them. So, when heat is provided to the object then forces between the atoms decreases and as a result, atoms start to move from their initial place.
Hence, atoms gain kinetic energy due to increase in their motion.
For example, when ice is heated it changes into liquid state of water.
Also, K.E = [tex]\frac{3}{2}kT[/tex]
where k = Boltzmann constant
T = temperature
Hence, kinetic energy is directly proportional to temperature.
Thus, we can conclude that the temperature of an object is directly related to the motion of its particles.
Blank is the theory that explains how large pieces of earths outermost layer move and change shape
you see a coin at the bottom of a fountain of water but when you reach for it it is in another place than it appears to be
A 1.0 mole sample of HNO3 is added to water. The final volume of the solution is 1.5 L. Calculate the pH of the Solution
The pH of the solution is 1.12.
HNO₃ is a strong acid, which means it completely dissociates in water to form H⁺ and NO₃- ions.
The number of moles of HNO₃ added is 1.0 mole.
The final volume of the solution is 1.5 L, so the concentration of HNO₃ can be calculated as:
[HNO₃] = number of moles / volume (in liters) = 1.0 mole / 1.5 L = 0.67 M
Since HNO₃ is a strong acid, it completely dissociates to form H+ ions. Therefore, the concentration of H⁺ ions is equal to the concentration of HNO₃:
[H⁺] = [HNO₃] = 0.67 M
Now, we can calculate the pH using the following equation:
pH = -log[H⁺] = -log(0.67) = 1.12
Therefore, the pH of the solution is 1.12.