What is the basic unit of energy?
Answer:
The basic unit of energy is the joule, also known as SI unit
Explanation:
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.
Which would slow down a reaction that is occurring in a solution at 25 degrees Celcius?
Question 11 options:
increase the air pressure above the solution
add a catalyst
put the solution over ice
add 10mL of water at 30 degree Celcius
Answer:
put the solution over ice.
Which element has a lower first ionization energy than aluminum (AI)?
The Periodic Table
A. Sodium (Na)
B. Neon (Ne)
C. Sulfur (S)
D. Boron (B)
Answer:sodium(a)
Explanation:
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.
Hi All,
What are good Science Questions for:
- Chemical Reactions
- Space
- Ecology
Please help.
Answer:Combination.
Decomposition.
Single displacement.
Double displacement.
Combustion.
Redox.
Explanation:
What is the formula for carbon dioxide?
Answer:
The molecular formula of Carbon Dioxide is CO2
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:
Give examples of other amino acids that serve as precursor and state for what?
Explanation:
Congenital erythropoietic porphyria, for example, prematurely ... Uroporphyrin I, coproporphyrin I, and other symmetric .
Who arranged the first periodic table.
Answer/Explanation:
Dimitri Ivanovich Mendeleev
Please mark me BRAINLIEST! please!
9. Which series shows levels of organization in order from the smallest to the largest
structure?
and Chemical
e
A cell, atom, molecule, organism
7s
B atom, molecule, cell, organism
and pH
C molecule, atom, cell, organism
D cell, molecule, atom, organism
Life
lasic Units of Life
Answer:
B. Atom, molecule, cell, organism
Explanation:
Atoms make up molecules. Molecules make up cells. Cells make up tissue. A number of tissues working together creates an organ. Multiple organs working together creates an organ system. Organ systems working together creates one happy, functioning organism. :)
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.
At STP, the element oxygen can exist as either O2 or O3 gas molecules. These two forms of the element have (1) the same chemical and physical properties (2) the same chemical properties and different physical properties (3) different chemical properties and the same physical properties (4) different chemical and physical properties
Answer:
O2 and O3 are allotropes of Oxygen, therefore they have (4) different chemical and physical properties.
Explanation:
What is Ky for H2BO3(aq) = H+(aq) + H2B03 (ag)?
А. К. :
[H,BO, 1
[H+ ][H,80,)
В. К.
[H+ ][H,BO,
[H,B03]
C. Ka = [H2B03][H+][H2B031
D. Ka = [H+][H2B031
Answer:
The answer is option c.
Hope this helps.
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.
Name the region of the atom where electrons are located.
Answer:
The electrons are found on the atomic nucleus.
Explanation:
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?
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)
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)
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:
Which polymer exists in both synthetic and natural form
Ni + F2 --> NiF2, Identify what's being oxidized, what's being reduced, the oxidizing agent, and the reducing agent.
Plz help ill give brainiest.
Answer:
hope this is correct
The oxidizing agent is F and The reducing agent is Ni.
What is meant by Oxidizing agent?An oxidizing agent also known as an oxidant, oxidizer, electron recipient, or electron acceptor is a substance in a redox chemical reaction that gains or "accepts"/"receives" an electron from a reducing agent called the reductant, reducer, or electron donor.
What is meant by Reducing agent?In chemistry, a reducing agent also known as a reductant, reducer, or electron donor is a chemical species that "donates" an electron to an electron recipient called the oxidizing agent, oxidant, oxidizer, or electron acceptor.
The oxidizing agent is F and The reducing agent is Ni.
To learn more about Oxidizing agent and Reducing agent refer:https://brainly.com/question/3123245
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What is the volume of a 4.0M solution that contains 374 grams of KNO3?'
Answer:
0.93L
Explanation:
We'll begin by calculating the number of mole of present 374g of KNO3. This is illustrated below:
Mass of KNO3 = 374g
Molar mass of KNO3 = 39 + 14 + (16x3) = 101g/mol
Number of mole of KNO3 =..?
Mole = Mass /Molar Mass
Number of mole of KNO3 = 374/101 = 3.7 moles
Now, we can calculate the volume of the solution as follow:
Mole of KNO3 = 3.7 moles
Molarity = 4M
Volume =..?
Volume = mole /Molarity
Volume = 3.7/4
Volume = 0.93L
Therefore, the volume of the solution is 0.93L
Answer:
THE VOLUME OF A 4 M SOLUTION THAT CONTAINS 374 g OF KNO3 IS 0.93 L
Explanation:
Number of moles = concentraion * volume
Number of moles can also be written as:
number of moles = mass / molar mass
Calculate the molar mass of KNO3 where (K = 39, N = 14, 0=16)
molar mass of KNO3 = (39 + 14 + 16*3) = 101 g/mol
So therefore:
mass / molar mass = concentration * volume
where;
mass = 374 g
molar mass = 101 g/mol
concentration = 4 M
volume = unknown
Hence,
374 / 101 = 4 * V
V = 374 / 101 * 4
V = 374 / 404
V = 0.9257 dm3
The volume of a 4M solution that contains 364 g of KNO3 is approximately 0.93 L
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
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.
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:
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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:
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
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