Answer:
Gravity force (friction towards Marek ).
Explanation:
According to the situation, Marek try to push the box which contains some mass because of sports equipment
Marek tries to push the box, but gravity tries to the down box on the floor.
So, box and floor create friction towards Marek
.
Answer:
Gravity force
Explanation:
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:
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.
Hi All,
What are good Science Questions for:
- Chemical Reactions
- Space
- Ecology
Please help.
Answer:Combination.
Decomposition.
Single displacement.
Double displacement.
Combustion.
Redox.
Explanation:
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. :)
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:
What are the Functional properties of boiled rice?
Please if you can write it in your words.
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 .
What is the 10th element of the periodic table?
Answer:
Neon
Explanation:
Answer:
Neon
Explanation:
Open this periodic table and you can see the names and numbers of every element
Hope it helps! :)
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
the reaction below shows a system in equilibrium how would an increase in the concentration of chemicals affect this reaction?
Answer:
Option B. The equilibrium of the reaction would shift to the right.
Explanation:
According to Le Chatelier's principle, when an external constrain such as change in concentration, temperature or pressure is imposed on a chemical system in equilibrium, the equilibrium position will shift in order to neutralize the effect.
Now, let us answer the question above.
From the question given above, the equation is:
A + B <===> C + D
Increasing the concentration of A will shift the equilibrium position to the right.
This is true because increasing the concentration of A means having more reactants in the system. So the reactants react to produce more product thereby shifting the equilibrium position to the right.
How long will it take the Sun to go around the galaxy once? a. 200 million years c. 100 thousand years b. 10 years d. 5 billion years
What does X represent for this transmutation?
96/242Cm + X→ 98/245Cf + 01n
gamma
+10e
24He
−10e
Answer:
2 4He
Explanation:
Please see attachment for explanation.
Answer:2/2 he
Explanation:
In 1990, the northern spotted owl was listed as endangered. Because of this, millions of acres of forests in the Pacific
Northwest became protected habitat. This stopped the timber industry from being able to cut down trees there. Which
of these was MOST LIKELY responsible for this?
A)
Clean Air Act
Eliminate
B)
Species Survival Plan
C)
Endangered Species Act
D)
Resources Conservation and Recovery Act
Answer:
the endangered spices act
Explanation: The US Endangered Species Act (ESA) is our nation's most effective law to protect at-risk species from extinction, with a stellar success rate: 99% of species listed on it have avoided extinction.
Answer:
C
Explanation:
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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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:
Who arranged the first periodic table.
Answer/Explanation:
Dimitri Ivanovich Mendeleev
Please mark me BRAINLIEST! please!
To build a boat in which material strength is the greatest concern, the best material to use would be?
A) PVC
B) aluminum
C) copper
D) There is not a clear choice.
Thank you
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 polymer exists in both synthetic and natural form
oswald avery helped build our understanding of genetics by showing that
Name the region of the atom where electrons are located.
Answer:
The electrons are found on the atomic nucleus.
Explanation:
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:
Urgent. Please help. I need the correct answer
Answer:
1. B - Both are monbasic.
B - Both are monbasic.2. B - fast but contains more water than acid
B - Both are monbasic.2. B - fast but contains more water than acid3. D - Acids made from oxides of non metals
B - Both are monbasic.2. B - fast but contains more water than acid3. D - Acids made from oxides of non metals4. C. Zn(OH)2
B - Both are monbasic.2. B - fast but contains more water than acid3. D - Acids made from oxides of non metals4. C. Zn(OH)25. C - Neutralization
B - Both are monbasic.2. B - fast but contains more water than acid3. D - Acids made from oxides of non metals4. C. Zn(OH)25. C - Neutralization6. B - H3O+
Explanation:
According to reaserch,
According to reaserch,An neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products. In a neutralization reaction, there is a combination of H+ ions and OH– ions which form wa acid anhydride is an acid anhydride that is an organic compound.
According to reaserch,An neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products. In a neutralization reaction, there is a combination of H+ ions and OH– ions which form wa acid anhydride is an acid anhydride that is an organic compound. An acid anhydride is a compound that has two acyl groups bonded to the same oxygen atom.
What is the formula for carbon dioxide?
Answer:
The molecular formula of Carbon Dioxide is CO2
What is observed when a solution of potassium iodide is added to silver nitrate solution ? a) No reaction takes place (b) White precipitate of silver iodide is formed (c) yellow precipitate of Agl is formed (d) Agl is soluble in water.
Answer:
c) yellow precipitate of Agl is formed
Explanation:
KI + AgNO3 = AgI (s)+ KNO3
c) yellow precipitate of Agl is formed
When k-37 undergoes positron emission what is the resulting atom
Answer:
The resulting atom is argon
Explanation:
Positron emission is a type of radioactive decay known as beta plus decay. This reaction is characterized by an element having an increase in the number of neutrons and a decrease in the number of protons.
This affects the atomic number in which it is decreased by one while the mass number remains unchanged.
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 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 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?
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)
