Answer:
I think the answer is Mechanical advantage is a measure of how much your force is multipled efficiency is measure of how much of the work you do actually goes to moving the thing you are trying to move.
Adding more pulleys may increase the mechanical advantage but, it also increases the amount of extra stuff you are moving.
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How does the law of conservation of mass apply to this reaction: Mg + HCl → H2 + MgCl2?
A. Hydrogen and chlorine need to be balanced. There is an equal amount of magnesium on each side
B. The equation needs to be balanced. There are fewer hydrogen atoms in the equation than magnesium or chlorine.
C. Only the hydrogen needs to be balanced. There are equal numbers of magnesium and chlorine.
D. The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.
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Viết phương trình điện li của KOH trong nước
Answer:
Điều này là kết quả của quá trình hydrat hóa các ion: lực hút của các phân tử nước đối với Công thức phản ứng của kali hydroxit với các ion nước. Phản ứng có thể được viết dưới dạng KOH (s) → K⁺ (aq) + OH⁻ (aq).
Explanation:
A sample of gas exhibits ideal behavior and occupies a volume of 350. mL at 25.0C and 1.00atm. How many moles of gas are present in the sample?
The number of mole of the gas present in the sample which occupies a volume of 350 mL at 25 °C and 1 atm is 0.0143 mole
From the question given above, the following data were obtained:
Volume (V) = 350 mL = 350 / 1000 = 0.35 L
Temperature (T) = 25 °C = 25 + 273 = 298 K
Pressure (P) = 1 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Number of mole (n) =?With the application of the ideal gas equation, the number of mole of the gas present in the sample can be obtained as follow:
PV = nRT1 × 0.35 = n × 0.0821 × 298
0.35 = n × 24.4658
Divide both side by 24.4658
n = 0.35 / 24.4658
n = 0.0143 moleTherefore, the number of mole of the gas present in the sample is 0.0143 mole
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Natures such as plants captures the suns energy and make their food through blank while blank get it energy by eating food
Answer:
Natures such as plants captures the suns energy and make their food through photosynthesis while Organisms get it energy by eating food
Explanation:
Photosynthesis is the act of transforming sunlight into energy. This is what plants (or natures) do to make their food.
In comparison, animals (or organisms) have to eat their food either by eating the plants (herbivores) or through other animals (carnivores)
This creates a food chain that energy travels down.
I hope this is what you were looking for, the grammar is a little confusing.
Give me an atom with the following characteristics.
Halogen
Alkali Metals
Lanthanide series
Transition metal
Alkaline Earth Metals
Nobel gas
Answer:
Explanation:
Halogen: Cl2
Alkali metal: Na
Lanthanide: Promethium
Transition metal: Gold
Alkaline Earth metal: Beryllium
Noble Gas: Neon
The following chart shows the masses and net force of vehicles travelling at the same velocity as they enter the highway. Which vehicle has the least momentum?
Vehicle
Mass (kg)
Force (N)
blue car
1,200
3,500
red car
1,100
3,500
green car
2,500
3,500
white car
2,000
3,500
green car
red car
white car
blue car
Answer:
red car as it has the least momentum
a solution k is saturated at 33 g solute in 100g solvent if a 50g solute is added to 200g solvent solution k is
Answer:
33 100gc50 is a 100
Explanation:
how long does it take to thaw a 16 lb frozen turkey?
Answer:
4-5 days
Explanation:
Which is a positive effect of using chemistry?
O The synthesis of drugs to disease may increase adverse reactions in others.
O The use of herbicides to increase resistance in tolerant plants.
O Fertilizer runoff from farms into natural waters will purify water systems.
O Energy can be generated without burning fossil fuels.
The positive effect of using chemistry is the generation of energy without fossil fuels.
Chemistry is the branch of science that deals with the study of the nature, properties and composition of matter as well as the changes that matter undergoes. Chemistry has really contributed positively to the advancement of the society.
Lately, there has been a lot of emphasis on alternative sources of energy apart from fossil fuels. One such options is the use of hydrogen fuels. Chemistry has been at the forefront of this research.
Hence, one positive effect of using chemistry is that energy can be generated without burning fossil fuels.
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Answer:
its D.
Explanation:
Define the precision?
Need Help!Chemistry! No links,no guessing please.
Answer:
picture 1:gain electrons and become negative ions.
picture 2:carbon and oxygen have different electronegativities.
picture 3: A
Based on their electrons dot diagrams, what is the formula for the covalently bonded compound
of nitrogen and hydrogen?
Answer:
Nitrogen, the next nonmetal, has 5 electrons in the valence shell, so it needs to combine with 3 hydrogen atoms to fulfill the octet rule and form a stable compound called ammonia (NH3).
The covalent compound formed from nitrogen and hydrogen is called ammonia with the formula NH₃. Each hydrogen shares its valence electron with three valence electrons of nitrogen.
What is ammonia?Ammonia, NH₃ is a covalent compound formed by the combination of nitrogen and three hydrogen atoms. Nitrogen is a highly electronegative element with 5 valence electrons.
Nitrogen needs 3 more electrons to achieve octet. Hence valency of nitrogen is 3. During chemical bonding it gains three electrons though sharing or donation from metals.
Hydrogen needs one more electron to be stable. Hence, nitrogen shares its three valence electrons each with three hydrogens and each hydrogen in turn shares its one valence electron with nitrogen forming NH₃.
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What are the properties of PLA plastic PLEASE HELP
Answer:
The Heat Deflection Temperature (HDT) 126 °F (52 °C)
Density 1.24 g/cm³
Tensile Strength 50 MPa
Flexural Strength 80 MPa
Explanation:.
5. How are the molecular structures of sugars and alcohols similar? How do
they differ?
The molecular structures of sugars and alcohols are similar due to the presence of the -OH group.
What is Sugar?This is a substance which has a sweet taste and is a form of simple carbohydrate.
They are however not similar due to the different numbers of Carbon atoms attached to the -OH group..
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A solution of 0.2 M Sulfuric acid is titrated with a 0.2 M basic solution. In three to five sentences, explain how you can use the results of the titration as evidence for the ratio of sulfuric acid and the base in the balanced chemical reaction for the titration.
If there are 0.2 M solutions of both acid and base, the concentrations of hydrogen and hydroxide ions will be equal at equivalence point.
The reaction of sulfuric acid and a basic solution BOH occurs as follows;
H2SO4(aq) + 2BOH(aq) -----> B2SO4(aq) + 2H2O(l)
In the question, we are told that that both the solution of the sulfuric acid and the basic solution are 0.2 M.
The point where all the hydrogen and hydroxide ions have reacted according to the stoichiometry of the reaction. If there is really equimolar amounts of acid and base, the concentration of hydrogen and hydroxide ions will be equal at equivalence point.
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Balancing Chemical Equation
H2=N2=NH3
Answer:
3H2=N2= 2NH3
Explanation:
Why might someone say walking on earth is like walking on air
Answer: It can mean To be in a state of extreme happiness. thich nhat hanh once said “People usually consider walking on water or in thin air a miracle. But I think the real miracle is not to walk either on water or in thin air"
Explanation: i know this stuff
Convert the speed of the earth traveling around the sun 66600 mi/h to m/s
Answer: 18.5
Explanation:
Just looked it up
Jamie's teacher asked her to identify four different objects based on the properties in the chart. What is most likely Object 4, and what evidence could she use to support it?
Object 4 is likely chlorine gas. This is because the texture of chlorine gas is slippery, and the color of chlorine gas is a yellowish green.
Object 4 is likely honey. This is because the texture of honey is slippery, and the color of honey is a yellowish green.
Object 4 is likely olive oil. This is because the texture of olive oil is slippery, and the color of olive oil is a yellowish green.
Object 4 is likely cheese. This is because the texture of cheese is slippery, and the color of cheese is a yellowish gree
Answer ummmm
Explanation:
hope this helps!
Physical changes occur when matter changes its__________property but not its nature.
Water turning into ice is an example of____________change.
Baking soda powder reacting to vinegar is an example of_____________change
Remember! Physical change:
Properties remain the________________
are_____________________
.
______ ___________substances are formed.
List 5 signs of chemical change:
List 5 examples of physical change: ______________________ ______________________
______________________
______________________
______________________
and
In a chemical change, the___________
change and the result is___________(can’t go back).
New substances produced in a chemical reaction have different_______________and________________
properties from the original substance.
When chemical bonds break, atoms rearrange, and new bonds form, a____________
______________
has occurred.
When a chemical reaction occurs between two liquids that form a solid, a_______________
is formed. FILL THE BLANKS!
Answer:Physical changes occur when matter changes its chemical property but not its nature. Water turning into ice is an example of a physical change. Baking soda powder reacting to vinegar is an example of a chemical change Remember! Physical change: Properties remain the same are____physichal_________________ . ______ ___________substances are formed. List 5 signs of chemical change: List 5 examples of physical change: ______________________ ______________________
Explanation:
i tried to answer the most because of my proofile page it seems like i am in high school but i am iin 6th grade
The mass of a 5.00 cm3 sample of gold is 96.5 g. The density of gold is.....?
Answer:
density = mass divided by volume
Explanation:
96.5 divided by 5
=19.3
answer = 19.3 g/cm 3
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A piece of mefal with mass of 6. 11 g is placed into a graduated cylinder that contains 25. 1 mL of water, raising the water level to 56. 7 mL, what is the density of the metal?.
at equilibrium the concentrations of reactants and products are
Answer:
Equal
Explanation:
At equilibrium, the concentrations of the reactants and products will be equal.
The electron configuration for nitrogen is 1s22s22p3. What is the electron configuration of the nitride anion
Answer:
1s22s22p6
Explanation:
Nitride anion N3-, has additional 3 electrons than N atom. So just add 3 more to the configuration
p orbitals can occupy a total of 6 electrons so when we add 3 more it becomes 2p6
Why is fusion not used to generate electrical power?
Answer:
One of the biggest reasons why we haven't been able to harness power from fusion is that its energy requirements are unbelievably, terribly high. In order for fusion to occur, you need a temperature of at least 100,000,000 degrees Celsius. That's slightly more than 6 times the temperature of the Sun's core.
Explanation:
Answer:
The energy requirements for fusion is too high to be used to generate electrical power.
Explanation:
background research about water purification and filtration!!!
PLEASE HURRY!!!
AND DO NOT GIVE ME FAKE ANSWER
Answer: It's a modern-day engineering challenge to remove human-made contaminants from
drinking water. After a quick review of the treatment processes that municipal water
goes through before it comes from the tap you will learn about the still-present
measurable contamination of drinking water due to anthropogenic (human-made)
chemicals. Substances such as prescription medication, pesticides and hormones are
detected in the drinking water supplies of American and European metropolitan cities.
The engineering design process can be used to design solutions for a real-world
problem (contaminated water) that could affect health.
Engineering Connection
The water that comes from our faucets has passed through a complex system designed
by many different types of engineers. Civil, chemical, electrical, environmental,
geotechnical, hydraulic, structural and architectural engineers all play roles in the
design, development and implementation of municipalities' drinking water supplies and
delivery systems. Hydraulic engineers design systems that safely filter the water at a
rate needed to supply a specific region and population. Chemical engineers precisely
determine the amounts and types of chemicals added to source water for coagulation
and decontamination to make the water safe to drink and not taste bad. Even so,
modern pharmaceutical and agricultural practices persist in contaminating our water
supplies.
Explanation: I'm big brain
40. Give the chemical symbol of each of the following
elements.
a. the two elements that are liquids at room
temperature
b. the noble gas with the greatest atomic mass
c. any metal from group 4A
d. any inner transition metal
Will give brainliest :)
Answer:
a) bromine , mercury .
b) Oganesson .
c) Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C), the metalloids silicon (Si) and germanium (Ge), the metals tin (Sn) and lead (Pb), and the yet-unnamed artificially-produced element ununquadium (Uuq).
d)thorium (Th), protactinium (Pa), uranium (U).
how long is a frozen turkey good for in the freezer?
Answer: Turkeys are good for up to 2 years if frozen well in a good freezer
I recommend to at least cooking it within 1 year for the best quality if you cook it in 2 years it may lose some of its quality taste-wise.
if it's not frozen well check the texture and smell to see if its gone bad. it also depends on the type of turkey you are buying, depending on the turkey you purchase always check for an expiration date such as a butterball turkey, so make sure you check their date.
The Î""G°′ of the reaction is −7.180 kJ·mol−1. Calculate the equilibrium constant for the reaction at 25 °C.
Answer:
Explanation:The Î""G°′ of the reaction is −7.180 kJ·mol−1. Calculate the equilibrium constant for the reaction at 25 °
conversion factors are useful in solving problems in which a given measurement must be expressed in
Answer:
In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.
The P generation, F1 generation, and F2 generation will have all cleft chins.
The P generation, F1 generation, and F2 generation will have all no-cleft chins.
The P generation and F1 generation will have all cleft chins.
The F1 generation will have all cleft chins.
The P generation and F2 generation will have all no-cleft chins.
The P generation and F2 generation will have cleft chins and no-cleft chins.
The P generation, F1 generation, and F2 generation will have cleft chins and no-cleft chins.
Explanation:
