Answer:
O = 94.117%
H = 5.882%
Explanation:
Hydrogen peroxide (H202) Molar Mass = 34g
OH 1- 17g/mol
H 1+ = 1g/mol
O = 16g/mol
2 Grams H
32 grams O
Percentage composition of Hydrogen peroxide
O = 32/34 = 94.117%
H = 2/34 = 5.882%
Which of the following processes requires more heat energy?
a. raising the temperature of 100.g of water by 10.0 °C
b. raising the temperature of 50. g of water by 10.0 °C?
Who arranged the first periodic table.
Answer/Explanation:
Dimitri Ivanovich Mendeleev
Please mark me BRAINLIEST! please!
Please say which is the anode (oxidation) and which is the cathode (reduction)
2H+ + 2e- ➖> H2 (g)
2I- ➖> I2 + 2e-
Explanation:
1st one will be cathodic reaction and reduction will occur since electrons are being gained and hydrogen goes from +1 to zero oxidation state.
2nd one will be anodix reaction and oxidation will take place because Iodide ion's oxidation number increases from -1 to 0
All the elements in this group form __________ ions with a positive _________ charge. _____________ is the most reactive element in the group.
(group 2-alkaline earth metals)
Answer:
1) positive
2)2
3)strontium
Explanation:
3. How many moles of each type of atom are in 1.0 mol of C6H12O6?
4. How many molecules are in 16.8 mol of H2O?
5. How many moles are present in 100.0 g of Al?
How do ethics affect scientific research?
A. Scientists should be forced to ignore their own ethical values
when doing research.
B. Scientists should not be allowed to conduct research that is
harmful to others.
C. Scientists should not let ethical issues limit scientific
advancement.
D. Ethics should be discussed in religion or philosophy but not in
science.
SUBMIT
Answer:
The answer is B.
Explanation:
Ethical concerns affect scientific research when scientists or groups of scientists let their personal bias or political persuasions affect the research being conducted. Scientific ethics involve doing experimentation and analysis of data without bias no matter what the conclusions point to.
Ethical principles dictate that researchers have a responsibility to ensure that their work does not cause harm to human beings, animals, or the environment. The correct answer is B. Scientists should not be allowed to conduct research that is harmful to others.
Research involving human subjects, for example, must adhere to strict ethical guidelines, such as informed consent and minimizing risks. Ethical review boards or committees often evaluate research proposals to ensure that potential harm is minimized or avoided.
Ethics significantly affect scientific research by guiding researchers to conduct their work responsibly, ensuring the well-being of individuals and society, and addressing potential conflicts between scientific advancement and ethical principles.
Therefore, the correct answer is B. Scientists should not be allowed to conduct research that is harmful to others.
For more details regarding ethical principles, visit:
https://brainly.com/question/30441909
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what radius (mm) must a steel (iron) ball bearing have if it is to have a mass of 3.25g? density of iron = 7.86g/cm3 V=4/3 pie r3
Answer:
Radius of the steel ball is 4.6mm
Explanation:
Hello,
To find the radius of the steel, we'll have to calculate it from it's volume which can be gotten from the density of the material.
Data;
Mass = 3.25g
Density = 7.86g/cm³
Density = mass / volume
Volume = mass / density
Volume = 3.25 / 7.86
Volume = 0.413cm³
Volume of a steel = 4/3πr³
0.413 = 4/3 × π × r³
0.413 = 1.33 × 3.14 × r³
0.413 = 4.1762r³
r³ = 0.413 / 4.1762
r³ = 0.099
Take the cube root of both sides
r = 3√(0.099)
r = 0.46cm
From metrics table
1cm = 10mm
0.46cm = x mm
x = (0.46 × 10)
x = 4.6mm
The radius of the steel ball is 4.6mm
1 Point
What energy conversion in your body enables you to get out of bed in the
morning?
O A. Chemical energy to kinetic energy
O B. Kinetic energy to potential energy
O C. Chemical energy to heat energy
O D. Heat energy to kinetic energy
SUBMIT
Answer:
KINETIC ENERGY
Explanation:
oswald avery helped build our understanding of genetics by showing that
With phenol the formaldehyde forms a polymer that is part of the plastic bakelite. Okay, but what is the equation????? I can’t find it
Answer:
Phenol reacts with formaldehyde to form Phenol-formaldehyde resins which is used to make plastic bakelite. Phenol-formaldehyde resins are made through a step-growth polymerization reaction.
equation of polymerization reaction in which Phenol (HOC6H5) reacts with formaldehyde (CH2O) is as following:
1. HOC6H5 + CH2O => HOC6H4CH2OH (hydroxymethyl phenol)
hydroxymethyl phenol then reacts with another hydroxymethyl group in next two steps and form methylene bridge (at firs) and ether bridge (secondly)
2. HOC6H4CH2OH + HOC6H5 => (HOC6H4)2CH2 + H2O
3. 2 HOC6H4CH2OH => (HOC6H4CH2)2O (bisphenol F) + H2O
Bisphenol F is the the diphenol (HOC6H4)2CH2 that is formed as the result and used to produce epoxy resins.
What is the basic unit of energy?
Answer:
The basic unit of energy is the joule, also known as SI unit
Explanation:
The molarity of a solution containing 7.1 g of sodium sulfate in 100 mL of an aqueous solution is
Answer:
0.5 M
Explanation:
First we have to start with the molarity equation:
[tex]M=\frac{mol}{L}[/tex]
We need to know the amount of moles and the litters.
If we have 100 mL we can convert this value to “L”, so:
[tex]100~mL\frac{1~L}{1000~mL}[/tex]
[tex]0.1~ L[/tex]
Now we can continue with the moles, for this we have to know the formula of sodium sulfate [tex]Na_2SO_4[/tex], with this formula we can calculate the molar mass if we know the atomic mass of each atom on the formula (Na: 23 g/mol, S: 32 g/mol, O: 16 g/mol). We have to multiply each atomic mass by the amount of atoms in the formula, so:
[tex]molar~ mass~=~ (23*2)+(32*1)+(16*4)= ~ 142~ g/mol[/tex]
In other words:
[tex]1~mol~ Na_2SO_4=~142~g~ of~Na_2SO_4[/tex]
Now we can calculate the moles:
[tex]7.1~g~ of~Na_2SO_4\frac{1~mol~ Na_2SO_4}{142~g~ of~Na_2SO_4} [/tex]
[tex]0.05~mol~ Na_2SO_4 [/tex]
Finally, we can calculate the molarity:
[tex]M=\frac{0.05~mol~ Na_2SO_4 }{0.1~ L}[/tex]
[tex]M=0.5[/tex]
I hope it helps!
Answer:
0.50M of solution
Explanation:
Molarity is defined as the ratio between moles of solute (In this case, sodium sulfate, Na₂SO₄) per liter of solution.
Moles of 7.1g of Na₂SO₄ (Molar mass: 142g/mol) are:
7.1g Na₂SO₄ × (1mol / 142g) = 0.05 moles of Na₂SO₄.
In 100mL = 0.100L:
0.05 moles Na₂SO₄ / 0.100L = 0.50M of solution
10. How any grams of N He are required to produce 120 grams of HNO3, assuming H2O2 is present in
excess?
N2H4 + 7 H2O2 → 2 HNO3 + 8 H2O
H2O2
N2H4
32
HNO3
63
H2O
18
34
Molar Mass
(g/mol)
Answer:
30.48g of N2H4
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
N2H4 + 7H2O2 → 2HNO3 + 8H2O
Step 2:
Determination of the mass of N2H4 that reacted and the mass HNO3 produced from the balanced equation. This is illustrated below:
Molar mass of N2H4 = (14x2) + (4x1) = 32g/mol
Mass of N2H4 from the balanced equation = 1 x 32 = 32g
Molar Mass of HNO3 = 1 + 14 + (16x3) = 63g/mol
Mass of HNO3 from the balanced equation = 2 x 63 = 126g
Summary:
From the balanced equation above,
32g of N2H4 reacted to produce 126g of HNO3.
Step 3:
Determination of the mass of N2H4 required to produce 120g of HNO3. This is illustrated below:
From the balanced equation above,
32g of N2H4 reacted to produce 126g of HNO3.
Therefore, Xg of N2H4 will react to produce 120g of HNO3 i.e
Xg of N2H4 = (32 x 120)/126
Xg of N2H4 = 30.48g
Therefore, 30.48g of N2H4 is required to produce 120g of HNO3.
Which polymer exists in both synthetic and natural form
8.
A sheep owner is caring for a sick lamb that has a severe navel infection. He gives the
lamb 2 cc of Ampicillin 4 times a day for three days. If each cc contains 125 mg of Ampicillin what is
the total number of mg of Ampicillin given to the lamb?
Answer:
900 mg
Explanation:
Do household items tend to be more acidic or basic? Are you surprised? Why or why not?
Answer:
they tend to be base
Explanation:
this because when they are manufactured they dont tend to use acid solution
What is the study of how matter and energy interact? A. Biology B. Chemistry C. Planetary science D. Physics
Answer:
Chemistry
Explanation:
Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy
Answer:
D. Physics
Explanation:
First, let's define all the answer choices.
Biology: Biology is the study of life and living things. Biology deals with the function, growth, origin and more of organisms.
Chemistry: Chemistry is the study of matter, elements, atoms, compounds, molecules and more. Chemistry is also concerned with chemical reactions.
Planetary science: Planetary science is basically the study of planets. This is the study of planets, moons and planetary systems.
Physics: Physics is the study of matter, energy, and their interactions. This helps us to explain and understand things that happen in the universe.
The best choice is D. Physics. Physics is the study of how matter and energy interact.
Compare and contrast analog and digital signals
Answer:
ones analog and ones digital.
Explanation:
The difference between the two are that one loses quality but is easier to transfer, however digital takes longer to transfer, however this makes the quality the same.
convert 5.68g of NaCl to moles
Answer:
The answer is 0.10026903242265733
In a single displacement reaction between sodium phosphate and barium, how much of each product (in grams) will be formed from 10.0 grams of barium?
Answer:
A. 3.36g of Na.
B. 14.62g of Ba3(PO4)2.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
3Ba + 2Na3PO4 → 6Na + Ba3(PO4)2
Next, we shall determine the mass of Ba that reacted and the mass of Na and Ba3(PO4)2 produced from the equation.
This is illustrated below:
Molar Mass of Ba = 137g/mol
Mass of Ba from the balanced equation = 3 x 137 = 411g
Molar mass of Na = 23g/mol
Mass of Na from the balanced equation = 6 x 23 = 138g
Molar mass of Ba3(PO4)2 = (3 x 137) + 2[31 + (4x16)] = 411 + 2[31 + 64] = 601g/mol
Mass of Ba3(PO4)2 from the balanced equation = 1 x 601 = 601g
Summary:
From the balanced equation above,
411g of Ba reacted to produce 138g of Na and 601g of Ba3(PO4)2.
A. Determination of the mass of Na produced by reacting 10g of Ba.
From the balanced equation above,
411g of Ba reacted to produce 138g of Na.
Therefore, 10g of Ba will react to produce = (10 x 138)/411 = 3.36g of Na.
Therefore, 3.36g of Na is produced.
B. Determination of the mass of Ba3(PO4)2 produced by reacting 10g of Ba.
From the balanced equation above,
411g of Ba reacted to produce 601g of Ba3(PO4)2.
Therefore, 10g of Ba will react to produce = (10 x 601)/411 = 14.62g of Ba3(PO4)2.
Therefore, 14.62g of Ba3(PO4)2 is produced.
What is the molality of a solution containing 5 moles of a solute and 13 kg of a solvent?
Answer:
Morality of a solution = 0.38461
Explanation:
Given:
Amount moles in solution = 5 moles of solute
Amount of solvent = 13 kg
Find:
Morality of a solution.
Computation:
⇒ Morality of a solution = Amount of mole solute / Amount of solvent
⇒ Morality of a solution = 5 / 13
⇒ Morality of a solution = 0.38461
⇒ Morality of a solution = 0.385 (Approx)
What kind of solution would have a ka value that is much less than 1?
A. A weakly basic solution
B. A strongly basic solution
C. A strongly acidic solution
D. A weakly acidic solution
Answer:
D. A weakly acidic solution.
Name the region of the atom where electrons are located.
Answer:
The electrons are found on the atomic nucleus.
Explanation:
1. Chlorobenzene, C6H5C1, is used in the production of chemicals such as aspirin
and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6.
with chlorine gas according to the following BALANCED equation.
C6H6 (1) + Cl2 (g) → C6H5Cl (s) + HCI (g)
Does this make a reaction? Because both products are soluble.
Answer:
Yes.
Explanation:
It will react. Because they are compounds
The following reaction shows the products when sulfuric acid and aluminum hydroxide react
Answer:
I can't see the picture so I'm not able to help you.
Explanation:
I'm incredibly sorry. Try to have a blessed day.
What is the formula for carbon dioxide?
Answer:
The molecular formula of Carbon Dioxide is CO2
what was Rudolf Virchow trying to prove through his work
Answer:
Rudolf Virchow was trying to prove through his work that spontaneous generation didn't happen.
Explanation:
Rudolf Virchow was trying to prove through his work that spontaneous generation didn't happen.
What is the mass of 1.450 mol Cd3N2?
124,2 g
234.7 g
529.6 g
738.9 g
529.6 g Cd₃N₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
1.450 mol Cd₃N₂
Step 2: Identify Conversions
Molar Mass of Cd - 112.41 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of Cd₃N₂ - 3(112.41) + 2(14.01) = 365.25 g/mol
Step 3: Convert
[tex]\displaystyle 1.450 \ mol \ Cd_3N_2(\frac{365.25 \ g \ Cd_3N_2}{1 \ mol \ Cd_3N_2} ) = 529.613 \ g \ Cd_3N_2[/tex]
Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
529.613 g Cd₃N₂ ≈ 529.6 g Cd₃N₂
Answer:
529.6 g
Explanation:
i took the test
71 points Chemistry tritiation please help me
If 30mL of 0.5M NaOH(aq) was used to neutralize 10mL of HCl(aq), what is the concentration of the acid? Show work.
Answer:
Answer in the picture
Explanation: