Answer:
H O
Explanation:
Here we are given that the percentage of ,
Oxygen = 94.10% Hydrogen = 5.90%And we need to find out the Empirical formula of the compound .
Firstly divide the given percentage by the atomic mass of the compound . Here this is followed in the fourth column of the table , which will give the relative number of atoms .Secondly , divide the value obtained by the smallest value among them .Say if we got the relative number of atoms as 4 , 3 and 2 , then divide all three numbers by 2 . ( follówed in 5th column below .)Finally write the Empirical formula of the compound by writing the ratio obtained as the subscript of respective compounds .Let's make a table ,
[tex]\boxed{\begin{array}{c|c|c|c|c} \underline{\bf Element} & \underline{\bf Percentage} & \underline{\bf Atomic \ Weight } &\underline{\bf No. \ of \ atoms_{relative} } &\underline{\bf Ratio } \\\\ \sf O & \sf 94.10 &\sf 16 &\sf \dfrac{94.10}{16}=5.88 &\sf \dfrac{5.88}{5.88}=1 \\\\\sf H &\sf 5.90 &\sf 1 &\sf \dfrac{5.90}{1}=5.90&\sf \dfrac{5.90}{5.88}\approx 1 \end{array}}[/tex]
Hence from this table we see that the ratio of oxygen and hydrogen is 1:1 . Therefore the Empirical formula of the compóund will be ,
[tex]\longrightarrow\underline{\boxed{\bf Empirical \ formula = H_1 O_1 = H \ O }}[/tex]
The empirical formula for the compound is OH
Data obtained from the question Oxygen (O) = 94.1%Hydrogen (H) = 5.90%Empirical formula =? How to determine the empirical formulaDivide by their molar mass
O = 94.1 / 16 = 5.88
H = 5.90 / 1 = 5.9
Divide by the smallest
O = 5.88 / 5.88 = 1
H = 5.9 / 5.88 = 1
Thus, the empirical formula for the compound is OH
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2. Fluorine gas exerts a pressure of 1.2 atm. When the
pressure is changed to 1.50 atm, its volume is 250 mL.
What was the original volume?
Answer:
look at the photo........................
Explain why it is advantageous that water does not evaporate quickly on earth
PLEASE HELP!!
Answer:
When the humidity is 100 percent, the air is saturated with water. Air pressure also affects evaporation. If air pressure is high on the surface of a body of water, then the water will not evaporate easily. The pressure pushing down on the water makes it difficult for water to escape into the atmosphere as vapor.
Explanation:
It is advantageous that water does not evaporate quickly on Earth because the soil and Earth water will be conserved.
What is evaporation?Evaporation is a process by which a liquid is converted to the gaseous state.
The water on the Earth surface in liquid form is evaporated with an increase in heat.
However, it is advantageous that water does not evaporate quickly on Earth because the water on the Earth surface will be conserved i.e. available for future use.
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For which pair of functions is the exponential consistently growing at a faster rate than the quadratic over the interval mc015-1. Jpg? mc015-2. Jpg mc015-3. Jpg mc015-4. Jpg mc015-5. Jpg.
Quadratic equation is a polynomial equation of the second degree.
What is a quadratic equation?The term quadratic equation refers to an equation of the type ax^2 + bx +c. It is a polynomial of degree 2. The highest power of x therein is only 2.
The question is incomplete hence we can't really tell which of the pair of functions in which the exponential is consistently growing at a faster rate than the quadratic over the interval.
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Answer:C
Explanation:
When cleaning a buret, begin by coating the inside with:.
Answer:
I think the answer is distilled water...
Explanation:
A 7.50g mass of compound A was added to 35.0g of water and it is found that the freezing point has decreased by 3.14°C. What is the molar mass of A?
This problem is providing us with the mass of an unknown compound, the mass of water it was added in and the change (decrease) in the freezing point the solution exhibited. Thus, the problem requires the molar mass of the compound, and at the end, the result turns out to be 126.7 g/mol, according to:
Freezing point depression:In chemistry, colligative properties are used to understand how the properties of a solvent change as a solute is added, forming a solution. In this case, we can use the following formula, since the solute decreased water's freezing point:
[tex]\Delta T_m=-m*Kf[/tex]
Where the molality is the first variable for us to calculate given the other two:
[tex]m=\frac{-3.14\°C}{-1.86\°C/m} =1.69m[/tex]
Thus, since this molality is in moles of solute per kilograms of solvent (water), one can find the former by multiplying the 35.0 g of water, but in kilograms:
[tex]n=\frac{1.69mol}{kg} *35.0g*\frac{1kg}{1000g} =0.0591mol[/tex]
Finally, we compute the molar mass as required:
[tex]M=\frac{7.50g}{0.0591mol}\\ \\M=126.9g/mol[/tex]
As we assumed this solute is nonionizing.
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exothermix reaction if you touched a flask where such a reaction was occurring, it would feel
It feel hot and feel warmer than before the reaction started.
A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a.
Answer:
Identify the disaccharide that fits each of the following descriptions: a. not a reducing sugar b. composed of two glucose units c. also called milk sugar d. hydrolysis gives glucose and fructose
naming compounding
N2O
Answer:
Nitrogenous oxide/ nitrogen oxide
Explanation:
N2O is nitrogen oxide
1. Explain again the
difference between
heat energy and
temperature.
Answer:
Heat describes the transfer of thermal energy between molecules within a system and is measured in Joules. Heat measures how energy moves or flows. ... Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R).
Explanation:
I hope it's helpful for you
Answer: Heat Energy/Thermal Energy is not the same as temperature. You mesure how hot or cold it is with a thermometer and it shows the temperature in either Fahrenheit or Celsius. Temperture is a way to measure the warm or coldness of a object. But it is a manifestation of heat energy. "is a physical quantity that expresses the degree of hotness or coldness of a substance. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter.. Temperature is measured with a thermometer."
Explanation:
Which of the following is true about this lever?
It will rotate clockwise.
It will rotate counter-clockwise.
It is balanced and will not rotate
it will rotate clock wise
What would be the answer could someone please help me?
Answer:
I think the answer could be A.
Explanation:
But i'm not sure.
Which of the following types of energy is potential energy?
Answer:
if you would like a proper answer you need to give us the options otherwise we can't help you?
Explanation:
When atoms lose electrons and form negatively charged ions, they always become smaller for two reasons.
True or false
Answer:
true, I've seen this before, it's true
What does the law of conservation of energy imply?
O A. That energy within matter can never be released
O B.
B. Tihin atoms will always combine to give off energy
Tuhin atoms
O c. That energy can only be converted between different forms
O D. That kinetic energy can only be converted to heat
Answer:
B. That energy can only be converted between different forms
Explanation:
The law of conservation of energy implies that energy can only be converted between different forms but can neither be created nor destroyed.
Energy is the ability to do work. It is very important physical quantity that is essential to all life forms.
Energy according to the law of conservation of energy is not produced neither is it destroyed.
Energy is simply transformed from one form to another.
A 25. 0-ml sample of 0. 150 m hydrocyanic acid is titrated with a 0. 150 m naoh solution. What is the ph beforeany base is added? the ka of hydrocyanic acid is 4. 9 × 10-10.
Answer:
stars,auroras,a neon sign
Explanation:
just did it
The release of water vapor from sweat glands when we are not sweating is a process called:.
From what we know, we can confirm that the release of water vapor from sweat glands when we are not sweating is a process called insensible perspiration.
What is insensible perspiration?This is a process by which we emit water in the form of vapor from our skin. This process is not to be confused with normal sweating. This happens at a near-constant rate in the human body and is not perceivable. The loss of water through this method also helps the body to maintain its homeostasis levels.
Therefore, we can confirm that the release of water vapor from sweat glands when we are not sweating is a process called insensible perspiration.
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Alkali metals are not reduced,why?
Alkali metals are not reduced because they are obtained by chemical reduction of their oxides.
Examine the snapshot of sedimentary layers shown here. Which statements accurately describe the relationship between these organisms? Select ALL that apply. A) Species B is more primitive than species C. B) Species A is more primitive than species B. C) Species C is more primitive than species B. D) Species B is more primitive than species A. E) All three species likely lived at the same time.
Answer:
The answer is: Species A is more primitive than species B.
Explanation:
Species A has worse genetics than all the other fishes.
What are some examples of the Law of Conservation of Mass ?
Answer:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted.
how to calculate formal charge on a lewis structure
Answer:
count how many electrons it 'owns'
How does a virus cause a disease?
A. They release toxins that poison your body's cell's
B. They use your body's cells to multiply
C. They break down your body's cells for food
D.They rob nutrients from your body's cells
B.
Explanation:
Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick.
Determine the molarity of a solution with a volume of 435. mL and 0.550 mol of solute dissolved.
Answer:
M = 1.26
Explanation:
Molarity = mole of solution/liters of solution
435mL/1000 = .435L
Plugging in the numbers into the formula, we get:
Molarity = .550 mol/.435L = 1.26 M
One reaction step in the conversion of ammonia to nitric acid involves converting NH3 to NO by the following reaction:
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
If 1.50 g of NH3 reacts with 2.75 g O2, then:
1. Which is the limiting reactant?
2. How many grams of NO and H2O form?
3. How many grams of the excess reactant remain after the limiting reactant is completely consumed?
the answer would be 2.75 x 4 nh3
The table shows the amount of radioactive element remaining in a sample over a period of time.
Radioactive Decay Rate
Amount of Radioactive Sample(grams)
45.0
31.8
22.5
15.9
11.3
Time(years)
0
11
22
33
44
Part 1: What is the half-life of the element? Explain how you determined this.
Part 2: How long would it take 308 g of the sample to decay to 4.8125 grams? Show your work or explain your answer
1. The half-life of the element is 22 years
2. The time taken for 308 g of the sample to decay to 4.8125 g is 132 years
Definition of half-lifeHalf-life is simply defined as the time taken for half of a material to decay.
1. How to determine the half-life Original amount (N₀) = 45 gHalf of the original amount = 45 / 2 = 22.5 gFrom the diagram, the time for 22.5 g is 22 years.
Thus, the half-life of the element is 22 years
2. How to determine the time i. Determination of the number of half-lives Original amount (N₀) = 308 gAmount remaining (N) = 4.8125 gNumber of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 308 / 4.8125
2ⁿ = 64
2ⁿ = 2⁶
n = 6
ii. Determination of the time Number of half-lives (n) = 6Half-life (t½) = 22 yearsTime (t) =?t = n × t½
t = 6 × 22
t = 132 years
See attached photo for diagram
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Please help it’s due tomorrow morning and I def want to sleep today
Answer:
Nitrogen: N3-
Aluminum: Al3+
Fluorine: F-
Sulfur: S2-
Oxygen: O2-
Argon: Ar
Explanation:
Argon is a noble gas, so it doesn't have a normal ionic charge.
Which statement is true?
Ozone is always good because it is made from oxygen.
Ozone is good in the stratosphere and bad at ground level.
Ozone is bad no matter where it is.
Answer: the second one for sure HOPE IT HELPD HAVE A AWSOME DAY :))))))))
Explanation:
Which one of the following states that energy can be transformed in different ways but can never be created or destroyed?
A. Charles's Law
B. Second law of thermodynamics
C. Entropy
D. First law of thermodynamics
Answer:
D. first law of thermodynamics
Acetic acid (CH3COOH) reacts with water to form the acetate ion and the hydronium ion: Upper C upper H subscript c upper C upper O upper o upper H (a q) plus upper H subscript 2 upper o (l) double arrow upper C upper H subscript 3 upper C upper o upper O superscript minus (a q) plus upper H subscript 3 upper o superscript plus (a q). At equilibrium, the concentration of CH3COOH is 2. 0 × 10–1 M, the concentration of CH3COO– is 1. 9 × 10–3 M, and the concentration of H3O is 1. 9 × 10–3 M. What is the value of Keq for this reaction? 1. 8 × 10–5 5. 5 × 104 9. 5 × 10–3 1. 1 × 102.
The value of Keq for this reaction is [tex]\bold{1.8 \times 10^-^5}[/tex]
The correct option is (A).
What is acetic acid?Acetic acid is an organic compound also called ethanoic acid. It is a colorless liquid with a chemical formula [tex](CH_3COOH)[/tex].
It has antibacterial and antifungal properties.
When acetic acid is reacted with water, it completely dissolves in it.
Thus, the correct option is A, [tex]\bold{1.8 \times 10^-^5}[/tex].
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Changes to Earth's Surface
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The image below shows part of a rounded ridge formation called an esker. This esker extends for several miles in an area that is
mostly flat plains. At one time, this ridge shape was occupied by a stream that flowed underneath a large glacier
Which of the following describes how the esker most likely formed?
ОА
As the glacier receded, the sediments in the stream built up to result in the formation
Св.
The glacier eventually melted and the water eroded the areas on both sides of the ridge
C. As the glacier receded, tectonic forces formed volcanoes, which spewed lava and formed igneous rock
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Answer: As the glacier receded, the sediments in the stream built up to result in the formation.
Explanation: study island
observation when hydrogen burns in the air
