Answer:
5.15 moles
Explanation:
2zn + o2 = 2zno
5.15 2.57 5.15 moles
nzno=500/(16x2+65)= 5.15 moles
-> nzn = 5.15 x 2 ÷ 2 = 5.15 moles
what is the common and IUPAC name for Oxygen?
Answer:
International Union of Pure and Applied Chemistry (IUPAC) justified ways how to name organic compounds [ hydrocarbons ].
Oxygen has only a molecular name which is dioxide
What is the difference between a theory and a scientific law?
Think of it like theory and physics.
A theory is an idea that needs to be tested.
Scientific law is something that cant be proven wrong.
Explain how conditions in the mantle crate a conventional current
Answer:
As the warmer material rises, it also cools, eventually pushed aside by warmer rising material and sinking back toward the core. Mantle material flows slowly, like thick asphalt or mountain glaciers. While the mantle material remains solid, the heat and pressure allow convection currents to move the mantle material
Please help! How do you calculate the "average percent yield"? I just need the formula.
I already know how to find the theoretical yield and percent yield, I just don't know how to find the average or what it means by average.
Answer:
First make sure the both weights have the same units.
Take your experimental yield and divide it by the theoretical yield.
Multiply this value by 100 to find the percent yield.
Explanation:
For the Average. Add up the two percent yields that you found and divide by 2.
3. Which statements are true based on the Bohr model of the atom? Select all that
apply.
encore
a. Atomic emission spectra are due to electrons losing energy and changing
energy levels
b. The energy of transition for n=3 to n=4 would be the same as n=5 to n=6
c. The first energy level is set at zero energy
d. Electrons lose energy as they travel around the nucleus
e. Each energy level has a specific energy value
The model of Neils Bohr postulates that electrons in atoms are found in specific energy levels. Transition from a higher to a lower energy level produces an emission spectrum characteristic of elements.
According to Bohr's model of the atom, an electron in atom exists in distinct energy levels. Electrons can be promoted from lower to higher energy levels when they absorb energy. The electrons are unstable in this higher energy excited state hence they quickly return to the ground state emitting energy. This emission is characteristic of elements.
The following statements are true based on the Bohr model;
Atomic emission spectra are due to electrons losing energy and changing energy levels.Each energy level has a specific energy valueLearn more: https://brainly.com/question/24556237
6Na(s) + N2(g) --> 2Na3N(s)
Answer:
80.0 g Na and 20.0 g N2.
Explanation:
This means the limiting reactant determines the maximum mass of the product formed.
HELP LAST ATTEMPT !?!!
Answer:
111Cd 12.80% stable
Explanation:
Maybe?
The mass of 1 mole of phosphorus atoms is how many
grams.
Answer:
approximately 30 g.
The mass of 1 mole of phosphorus atoms is approximately 30 g.
Explanation:
Hope this helps.
Calculate the heat produced by hydrolysis of 65 kg of ATP (the molecular weight of ATP is 507.18 g/mol).
The heat produced by hydrolysis of 65 kg of ATP is -6.8 kJ.
Let's consider the thermochemical equation for the hydrolysis of ATP.
ATP + H₂O ⇒ ADP + Pi ΔG = -57 kJ/mol
We will convert 65 kg of ATP to moles using its molecular weight (507.18 g/mol).
[tex]65 \times 10^{3} g \times \frac{1mol}{507.18g} = 1.2 \times 10^{2} mol[/tex]
57 kJ of heat are released by the hydrolysis of 1 mole of ATP. The heat released by the hydrolysis of 1.2 × 10² moles of ATP is:
[tex]1.2 \times 10^{2} mol \times \frac{(-57kJ)}{1mol} = -6.8 \times 10^{3} J = -6.8 kJ[/tex]
-6.8 kJ is the heat produced by hydrolysis of 65 kg of ATP.
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How much heat is necessary to 20g of water at 100*C into steam at 100*C?
Answer:
To convert 100.0 g of water at 20.0 °C to steam at 100.0 °C requires 259.5 kJ of energy.
The amount of heat which is required for a phase change of a substance without any change in temperature is known as latent heat. Here the amount of heat required is 10,800 calories.
What is heat capacity?The heat capacity of a substance or a system is defined as the amount of heat required to raise its temperature through 1°C. It is denoted by C. The specific heat capacity is the amount of heat required to raise the temperature of 1 gram of the substance through 1°C.
The equation to calculate the heat required is:
Q = mc (T₂ - T₁) + mL₁
L = Latent heat of vaporization of water
m = mass
c = specific heat capacity
T₂ = Final temperature
T₁ = Initial temperature
T₂ - T₁ = 100 - 100 = 0°C
Q = 20 g × 1 cal /g°C × 0°C + 20 g × 540 cal/g
Q = 10,800 calories
Thus the amount of heat required is 10,800 calories.
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If an ionic compound has a 2- charge how does that affect the total number of electrons in a Lewis structure
In the situation where an ion has a charge of -2, the Lewis structure is affected because it must add two additional electrons.
The Lewis structure is a term to refer to the graphical representation that shows the pairs of electrons in dashes or points of bonds between:
The atoms of a moleculeThe lone electron pairs that may existAdditionally, the charge of an ionic compound is calculated using the difference in electrical charge between the electrons. On the other hand, an ion is formed by adding or removing electrons, so the magnitude of the resulting charge depends on the number of electrons added or removed.
According to the above, if an ionic compound has a -2 charge, the Lewis structure must add two electrons.
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Convection currents in the atmosphere influence many weather patterns. What property of the air has the most influence on convection currents?
1. The direction of the wind
2. The velocity of the wind
3. The temperature of the air
4. The mass of the air
Convection currents are largely influenced by air temperature. A low-pressure area is produced when air is heated because it becomes less dense and rises.
What effect on the climate does convection have?For instance, the air above the Earth heats and rises as its surface warms from the sun. This air may continue to rise while cooling and producing cumulus clouds if the conditions allow.
How do air masses respond to convection currents?Climate-affecting wind patterns are driven by convection currents. Convection currents are used to shift air masses. There are two different kinds of air masses: warm and cold. From higher latitudes to lower latitudes, cold air masses travel.
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calculate the pH of the following
A.0.02mol/L HCI
B. 0.1 mol/L NaOH
Answer:
A.
Explanation:
hope it helps
Who created the planetary model of the atom?
Question 1 options:
Democritus
Dalton
Rutherford
Bohr
A basketball weighing 0.5 kg is flying through the air at 10
m/s. What is its kinetic energy?
Enter the answer
Check it
Improve this questio
Answer:
25J
Explanation:
Kinetic energy = (mv^2)/2. So (.5)(10^2)/2 = 25 J
Giving brainliest!!!!!!!!!!!!!
I am the first one to comment, please give me the brainliest <3
What's the study of earth and its atmosphere ?
Answer:
Meteorology is the science dealing with the atmosphere and its phenomena, including both weather and climate
Answer: Meteorology I believe
Explanation:
Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.
2NaClO3 --> 2NaCl +3O2
How many moles of O2 were produced by 2 moles of NaClO3? Round your answer to the nearest whole number.
Explanation:
3 moles of O2 will be produced from 2moles of NaCLO3.
hope this helps you.
Balance an equation
Answer:
no
Explanation:
s ss s s s s s s s s s s s s ss s s s s dkfkf f f f f f f f
who do you think has the problem in this communication process
Answer:
what
Explanation:
i d k what this question is
Explain why “advancing water contact angles are more sensitive to the hydrophobic property of a surface whereas receding water contact angles are more sensitive to the hydrophilic property of a surface”.
Answer: Surface tension has a more complicated effect on capillary pressure: on the one hand, capillary pressure is directly proportional to surface tension. High surface tension liquids, on the other hand, typically have higher contact angles, which lowers capillary pressure.
Explanation: Does this help??
✞how are snythetic detergents better than soap??⭐⭐㋛
Answer:
Advantages of synthetic detergents over soaps: Detergents can work with hard water too while soaps cannot. Synthetic detergents are stronger cleansing agents than soaps.
Explanation:
sorry if I'm wrong
MARKING BRAINLIEST! HURRY!!
Read the following list of objects:
a flying insect, a stretched elastic band, a falling stone, a flowing river, a coiled spring
Which of the objects have only potential energy?
A flying insect, a coiled spring
A stretched elastic band, a coiled spring
A falling stone, a flying insect
A flowing river, a flying insect
Answer:
a coiled spring
Explanation:
Noble gas:
Oxygen
Chlorine
Or Krypton
Answer:
Krypton
Explanation:
Answer:
C
Explanation:
trust me :)
How would a descriptive model of Earth's layers be categorized?
a. abstract model
b. prototype model
c. concrete model
d. conceptual model
The Earth can be divided into one of two ways – mechanically or chemically. Mechanically – or rheological, meaning the study of liquid states – it can be divided into the lithosphere, asthenosphere, mesospheric mantle, outer core, and the inner core.
Explanation:
The theory of spontaneous generation states that *
A. Even though higher level organisms cannot be created from inanimate objects, it is possible for microorganisms
B. Living organism can be created from nonliving matter
C. Life is created by other living things
D. Only living humans can create other living creatures
Answer:
B. Living organism can be created from nonliving matter
Explanation:
The theory of spontaneous generation states that life could come from non-living things.
A 200.0 ml beaker filled with oil has a mass of 293.2 g. The mass of just the beaker is 130.2
g. What is the density of the oil?
Answer in a complete sentence. Show your work. Your final answer should have the cor-
rect number of sig figs. show work!
Answer:p=m/v
p=(292.2-130.2)/200
p=0.8100g/ml
Explanation:
Density of a substance is the ratio of its mass to volume. The density of the oil filled in a 200.01 ml beaker is 0.815 g/ml.
What is density?Density of a substance is the mass per volume. Thus we het how much of its particles are located per one unit of volume.
Mathematically density can be written as mass/ volume. The mass of the beaker containing oil is given as 293.2 g. The mass of beaker itself is 130.2 g. Hence, mass of oil is 293.2 - 130.2 = 163 g.
Volume of the oil is 200 ml. Thus density is 163 g/200 ml = 0.815 g/ml.
Hence, the oil in the beaker with 200 ml volume and 163 g mass have a density of 0.815 g/ml.
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Planets, asteroids, and comets orbit the Sun in our solar system because the Sun is the__________
Strongest magnetic field in the solar system
Most massive object in the solar system
Answer:
strongest magenetic field in the solar system
Explanation:
Aluminum reacts with chlorine gas according to the following equation shown below. How many
moles of Cl2 are required to react with 0.062 mol of Al?
2 Al(s) + 3 Cl2(g) → 2 AIC13()
_mol
Answer:
nCl= 0,062x3/2=0,093(mol)
Explanation:
CFCs (or halocarbons) are ____ - _____ (range) times as powerful a GHG as CO2.
A) 1,000 - 15,000
B) 2,000 - 25,000
C) 5,000 - 65,000
D) 500 - 5,000
CFCs are 1000-15000 times powerful as compared to greenhouse gas such as CO2.
Chlorofluorocarbons are present in less amount or less abundant than carbon dioxide gas in the atmosphere but they are 10,000 times more powerful as a greenhouse gas.
These CFCS gases can remain in the atmosphere for more than 45 to 100 years. CFCS gases greatly damaged the ozone layer by reacting with it that leads to increase in the diseases such as skin cancer so we can conclude that CFCs are more powerful as compared to carbondioxide gas.
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