How does the study of science benefit society
Answer:
Study of science benefits society in a various ways such as it help the society to improve the condition by creating awareness and knowledge, it also helps the society to meet the global challenges and provide improvement in the education field.
Explanation:
The study of science benefit society in a various ways
Science is used everywhere in society such as in industry, research and in solving human problems.Study of science benefits society by creating awareness and knowledge to react to the societal requirements. It also helps the society to meet the global challenges and provide improvement in the education field.Science has played a significant role in improving the condition of society and understanding the cultural.Convert 30 g/L to the unit g/mL.
A) 30,000 g/mL
B) 300 g m/L
C) 0.03 g/mL
D) 0.0003 g/mL
Anouk does 150 J of work using a hammer to pull a nail out of a piece of wood, and the hammer does 105 J of work on the nail. What is the efficiency of the hammer? 1.4% 7% 70% 143%
Answer:
70%
Explanation:
105 divided by 150 equal to 0.7. then u multiply 0.7 by 100. equal 70. so its C because efficiency = (effective work)/(executed work) * 100%
hope it helped :3
Answer:
70%
Explanation:
105 divided by 150 equal to 0.7. then u multiply 0.7 by 100. equal 70. so its C because efficiency = (effective work)/(executed work) * 100%
15) Which of the these is a balanced chemical equation?
A) CO(g) + O2(g) → CO2(g)
B) CO(g) + 2O2(g) → 2CO2(g)
C) 2CO(g) + O2(g) → 2CO2(g)
D) 2CO(g) + 2O2(g) → 2CO2(g)
Answer:
c
Explanation:
A chemist mixes oxygen gas and hydrogen gas to form water, which is composed of one oxygen and two hydrogen atoms per molecule. What has occurred?
Answer:
A chemical change.
Explanation:
I just took the test and got it right.
when hydrogen peroxide bubbles, it is undergoing a chemical change. which statement best describes what is happening?
which best explains why sawdust burns more quickly than a block of wood equal mass under the same conditions
Sawdust burns more quickly than a block of wood because it has a higher surface area, which allows more oxygen to come into contact with the wood particles and accelerate the combustion reaction. Larger blocks have less surface area exposed to oxygen, so they burn more slowly. High surface area is also the reason why powdered substances, like flour in mills, can be hazardous.
The reason why sawdust burns more quickly than a block of wood of equal mass under the same conditions can be attributed to the difference in surface area. Sawdust consists of tiny particles, each with its own surface exposed to the oxygen in the air. This increased surface area allows for more oxygen molecules to come in contact with the wood particles simultaneously, thus speeding up the combustion reaction.
Larger pieces of wood, such as blocks, have a lower surface area relative to their mass because much of the wood's material is inside the block, where oxygen cannot easily reach. As a result, the reaction takes place more slowly. When more surface is exposed, as with sawdust, there is a greater likelihood for the wood particles to come in contact with the oxygen required for burning, leading to a faster reaction rate.
Examples of this can be seen when starting a fire; kindling with a high surface area is used to initiate the fire due to its ability to burn more rapidly. Additionally, this principle demonstrates why powdered substances can be more hazardous, as seen in the explosion risk in flour mills, where flour particles have a high surface area.
Why are p waves called push-pull waves?
Because they move in a horizontal path
Explanation;P waves or the primary waves are the first waves to arrive during an earthquake. They are the fastest waves created by an earthquake.P waves travel through the interior of the earth and an pass through both solid and molten rock. These waves are also known as compressional waves due to their pulling and pushing. When particles are subjected to a P wave they move in the same direction as the wave motion which is the direction of energy travel.is C3h8 an acid or base
C3h8 an acid or base - no, it is neither acid nor base as propane does not give proton or hydroxide ions.
An acid
is a chemical molecule that gives protons or hydrogen ions and/or accepts electrons in any solution on dissociation.An increase in the concentration of hydrogen ions produced by an acid, there will increase the strength of acidity and lower the pH of the solution.A base
is a chemical molecule or substance that can either gain hydrogen ions (protons) or, more give up a pair of valence electrons.it can be thought of as the chemical opposite of an acid.Whereas, propane [tex]C_3H_8[/tex] neither an acid nor a base as it does not give either hydrogen ion or hydroxide ion on dissociation.
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1.What does the Law of Conservation of Energy tells us?
2.Give an example of 1 way that heat is transferred in your home by conduction, convection and radiation.
3.What is the difference between renewable and nonrenewable resources?
4. Energyville has run out of fossil fuels and is in an energy crisis. What is one type of renewable energy source that you might recommend to the mayor of Energyville and why do you think that it should be considered?
5. Develop an action plan that includes one specific way that you can conserve energy in your own home.
Final answer:
The Law of Conservation of Energy highlights the transformation, not the depletion, of energy. In homes, heat transfers via conduction, convection, and radiation. Solar energy is advised for Energyville for its renewable qualities, while swapping to LED lights at home conserves energy.
Explanation:
The Law of Conservation of Energy teaches us that energy cannot be created or destroyed, only transformed from one form to another. This principle is fundamental in understanding how energy interacts and transforms in the universe.
Conduction: Heat moving through the walls of your house.
Convection: Warm air circulating inside a room.
Radiation: Heat from the sun warming your home's surfaces.
Renewable vs Nonrenewable Resources: Renewable resources, such as solar and wind, can be replenished over time and have lower environmental impacts, whereas nonrenewable resources, like coal and oil, are finite and typically more polluting.
For Energyville, I recommend solar energy as a renewable source due to its accessibility, decreasing cost, and low environmental impact compared to other energy sources.
One way to conserve energy at home is to replace incandescent bulbs with LED lights, which use less energy and last longer, significantly reducing energy consumption and costs.
What is the name of this alkane?
A) 1-methylbutane
B) 2-methylbutane
C) 1,2-triethylethane
D) 1-dimethylpropane
Answer: Option (B) is the correct answer.
Explanation:
Numbering of carbon atoms will be done in such a way that the methyl group [tex](CH_{3})[/tex] attached to the linear carbon chain will get least number.
Therefore, numbering will be done from left to right.
The given molecule shows that a methyl group is attached to the second carbon and rest there is a linear chain of four carbon atoms.
Thus, we can conclude that name of the given alkane is 2-methylbutane.
1. Ernest Rutherford discovery of radioactivity 2. James Chadwick discovery of the electron 3. Henri Becquerel discovery of the neutron 4. J.J. Thomson discovery of the atomic nucleus
Answer:
1. Ernerst Rutherford =====> Discovery of Atomic Nucleus
2. James Chadwick =====> Discovery of Neutron
3. Henri Becquerel =====> Discovery of Radioactivity
4. J.J. Thomson =====> Discovery of Electron
Explanation:
which of the following materials is necessary to stop a beta particle
[03.04]When one atom of potassium (K) combines with one atom of fluorine (F), an ionic bond forms, resulting in potassium fluoride (KF). Which of the following describes the arrangement of valence electrons in a bond between K and F?
The valence electrons are shared equally between K and F.
The valence electrons spend more time around the atom of K.
The valence electrons spend more time around the atom of F.
The valence electrons are given up by the K and gained by the F.
The valence electrons are transferred from the potassium atom to the fluorine atom, resulting in the formation of an ionic bond in potassium fluoride (KF), with potassium becoming a cation and fluorine becoming an anion.
Explanation:When one atom of potassium (K) combines with one atom of fluorine (F), an ionic bond forms, resulting in potassium fluoride (KF). In this process, the valence electrons are not shared equally between K and F, nor do they spend more time around the atom of K. Instead, the valence electrons are transferred from the potassium atom to the fluorine atom, due to the difference in electronegativity between the two elements. Potassium, which has just one electron in its valence shell, easily donates this electron, becoming a positively charged ion, or cation. Fluorine, which has seven electrons in its valence shell, gladly accepts this electron to complete its octet, becoming a negatively charged ion, or anion, as a result.
which of the following would you list under cash inflow in a financial plan
In a financial plan, cash inflows represent the sources of revenue or capital coming into the business. This could be from sale of products or services, investment income, funds raised from investors or loans, or reinvested profits.
Explanation:In a financial plan, cash inflows represent the sources of revenue earned by the business. Such cash inflows could be listed as follows:
Sale proceeds from goods or services: This makes up the operating revenue for businesses. Investment income: if the firm has made investments, then the income from these investments such as interest, dividends, or returns would be considered a cash inflow. Funds raised from early-stage investors, loans from banks or bonds, or by selling stock would also get listed under cash inflow as they represent capital coming into the firm. Reinvested profits, while they're not fresh cash coming in, represent an internal cash inflow, repurposing earned money for further business growth
Under cash flows, we focus primarily on the channels that bring cash into the organization.
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How many moles of KMnO4 can be produced from 0.886 moles of carbon dioxide?
Answer:
2.48
Explanation:
A scientist wished to carry out a chemical reaction in which two moles of aluminum combine with three moles of sulfur. He has 2.70 g of aluminum to react. How many grams of sulfur must he take to satisfy all the aluminum atoms?
1.51 g
2.14 g
3.41 g
4.81 g
Answer : The correct option is, 4.81 g
Explanation : Given,
Mass of aluminium = 2.70 g
Molar mass of aluminium = 26.98 g/mole
Molar mass of sulfur = 32.07 g/mole
First we have to calculate the moles of aluminium.
[tex]\text{Moles of Al}=\frac{\text{Mass of Al}}{\text{Molar mass of Al}}=\frac{2.7g}{26.98g/mole}=0.1mole[/tex]
Now we have to calculate the moles of sulfur.
According to the question,
As, 2 moles of aluminium react with 3 moles of sulfur
So, 0.1 mole of aluminium react with [tex]\frac{3}{2}\times 0.1=0.15mole[/tex] of sulfur
Now we have to calculate the mass of sulfur.
[tex]\text{Mass of sulfur}=\text{Moles of sulfur}\times \text{Molar mass of sulfur}[/tex]
[tex]\text{Mass of sulfur}=0.15mole\times 32.07g/mole=4.81g[/tex]
Therefore, the mass of sulfur he take must be, 4.81 g
What's the primary difference between a scientific theory and a scientific law , is that a law?
It explains why some physical phenomenon behaves as they do.
Which energy levels in the atom is the valence shell?
The valence shell is the outermost electron shell in an atom and contains the valence electrons essential for chemical bonding and reactions.
The valence shell is the outermost shell of electrons in an atom. It contains the valence electrons, which are the electrons most likely to be involved in chemical reactions and bonding. For main group elements, the valence shell includes the highest n level s and p subshells.
In the case of transition metals, their valence shell comprises the highest energy s and d subshells, whereas for inner transition elements, the s, d, and f subshells are part of the valence shell. An atom is considered to be more stable and less reactive when its valence shell is full, because these valence electrons determine the chemical properties of an element and its potential to bond with others.
For example, sodium (Na) has a valence shell configuration of 3s¹, where the number 3 represents the highest-numbered shell and s defines the type of orbital occupied by the valence electron. In the periodic table, elements in the same group have the same valence shell electron configuration, which accounts for their similar chemical behaviors.
A prairie dog runs into its burrow as a coyote approaches.This behavior helps the prairie dog
Answer:
sample response: Prairie dogs create a safe home for their young by creating underground burrows, which protect them from hailstorms, blizzards, floods, droughts, and fires. The burrow contains many different chambers, including a nursery that is very deep underground. This protects the young from predators as well as changes in the temperature outside. The burrows even include observation posts where they can watch for predators.
Explanation:
What is true about the elements of a period? They have the same number of electron shells. They have similar chemical characteristics. They have similar physical characteristics. They transition from a metal to nonmetal to inert gas from left to right.
Answer:
They have the same number of electron shells, and they transition from a metal to nonmetal to inert gas from left to right.
Which of the following is the correct name for the compound MgBr2
Answer : The correct name for the compound [tex]MgBr_2[/tex] is, Magnesium bromide.
Explanation :
Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.
Ionic compound are usually formed when a metal reacts with a non-metal.
The rules for naming the ionic compounds is given as :
The positive ion (cation) is named first.The negative ion (anion) is named next.The suffix is added at the end of the negative ion (anion). The suffix used is '-ide'.Hence, the correct name for the compound [tex]MgBr_2[/tex] is, Magnesium bromide.
How many moles of Mg(OH)2 are needed to completely neutralize 2.48 mol HNO3
the answer is 1.24 mol Mg(OH)2
The required moles of Mg(OH)₂ that are needed to completely neutralize 2.48 mol of HNO₃ is 1.24 moles.
What is the stoichiometry?Stoichiometry of the reaction gives idea about the relative amount of moles of reactants and products present in the given chemical reaction.
Given chemical reaction is:
Mg(OH)₂ + 2HNO₃ → Mg(NO₃)₂ + 2H₂O
From the stoichiometry of the reaction, it is clear that:
2 moles of HNO₃ = reacts with 1 moles of Mg(OH)₂
2.48 moles of HNO₃ = reacts with (1/2)(2.48)=1.24 moles of Mg(OH)₂
Hence required moles of Mg(OH)₂ is 1.24mol.
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Liquid nitrogen has different properties from gaseous nitrogen. Is it a chemical change when liquid nitrogen warms to gaseous nitrogen?
Answer:
No, because the different properties are physical while the chemical properties remain the same.
Explanation:
What is the value of in a spontaneous reaction?
What is the name of this molecule?
CH2 - CH2 - CH3
|
CH3 - CH2 - CH - CH2 - CH = CH3
water absorbs and releases large amounts of heat before its temperature changes because water has a high
Water has a high specific heat capacity, which means it requires a lot of energy to change its temperature due to the hydrogen bonding among its molecules. This makes it slow to heat up and cool down, which is used by warm-blooded animals and affects the temperature of land and sea.
Water absorbs and releases large amounts of heat before its temperature changes because water has a high specific heat capacity. This capacity is due to the extensive hydrogen bonding among water molecules. Specific heat is the amount of heat needed for one gram of a substance to absorb or lose to change its temperature by one degree Celsius. Water's amount is one calorie or 4.184 Joules. Therefore, it takes a long time for water to heat and cool compared to other substances like sand, which has a specific heat capacity approximately five times lower than that of water.
The high heat capacity of water also has practical applications, such as warm-blooded animals using water to regulate and disperse heat throughout their bodies, much like a car's cooling system. This property also explains why the land cools faster than the sea.
what state of matter has a fixed volume and a fixed shape
A. liquid
B. gas
C. plasma
D. solid
Off all the states of matter, only solids have a defined shape, due to stronger bonds between its molecules/atoms. Unlike solids, Liquids and gasses take the shape of whatever container they are placed into. This, again, is due to weaker linkages between the atoms/molecules of gasses and liquids.
Which of the following is the weakest? A. hydrogen bond B. polar covalent bond C. dipole interaction D. ionic bond
The answer is A. Hydrogen bond
Molecules that have nonpolar covalent bonds donot form hydrogen bonds. Strenght. Hydrogen bonds are classified as weak bonds because they are easily and rapidly formed and broken under normal biological conditions.
Hope I helped :)
-Bucky
Antimony (III) sulfide is reacted with excess iron. If 175.6 grams of pure antimony is produced, what mass of antimony (III) sulfide was required to start with? Sb2S3(s) + 3Fe(s)→2Sb(s) +3FeS(s)