Please Help Me!
Which metal reacts spontaneously with NiCl2(aq)?
A) Au(s)
B) Cu(s)
C) Sn(s)
D) Zn(s)
Answer:
THE answer IS B)cu(s)
Explanation:
HOPE ITS HELP
The metal reacts spontaneously with aqueous solution of NiCl₂ is Zinc as it is more reactive.
What is reactivity series?Electro chemical series is a reactivity series which tells about the reactivity of the metals present in any solution in the increasing order.
According to the reactivity series, Zinc is present at the upper position as compares to other three given metals and their reactivity will be represented as:
Zn > Ni > Sn > Cu > Au
So, zinc will replace the nickel atom from NiCl₂ solution.
Hence option (D) is correct.
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Help ASAP loll
Will give Brainly
which of the following is a compound machine?
a. bicycle
b. ramp
c. screw
d. knife
Answer: I think it is a bicycle
Explanation: A bicycle has many parts
Answer all of dem Free BRAINIEST ON THE ROLL
The graphs show temperature and precipitation information for an area.
Which biome best describes the area represented by the graphs shown?
Answer:
Desert
Hope I helped
Please answer the following question I give you.
1. What do waves begin with? (this is science)
2. What do waves transfer?
3.What do waves not transfer?
Answer:
1.Waves are caused by wind
2. energy
3. matter
Answer: Wave is a common term for a number of different ways in which energy is transferred; so in electromagnetic waves, so the energy is transferred through vibrations of electric and magnetic field. Does that answer your question.
Explanation:
That is my answer
According to Newton's Second Law of Motion, a decrease in mass will
increase acceleration
is that the answer?????
What have all living things evolved from?
Coprolites
Earlier species
Fossils in rocks
Shells
Answer:
Coprolites.........!!!
Answer:
all living beings are involved from early spices
why do we have night and day? (i can't find science so i just put it in chemistry)
Answer:
So we get to go to sleep in my opinion. And because the world all have sunlight at different times. So it makes sense to have separate times of the day. Night and day also this is most likely one reason for why we do have days.
Explanation:
it’s because we have different times that we get sunlight at in different places.
PLZ HELP! :) thank you
Answer:
biotic
Explanation:
because all of them are living
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Why does the border between light and dark on the Moon change location?
We only view a portion of the lighted part of the Moon because of how the Moon rotates around the Earth.
What is solar system?Solar system is defined as the Sun's orbiting objects are confined by gravity to one system. The Solar System is the only system in which a habitable planet has been observed, the only star we can observe up close, and the only planets we can explore with spacecraft. Understanding the creation and evolution of planets as well as the conditions required for life requires extensive investigation into the solar system.
The terminator is the line on the moon that divides day from night. The moon's surface is in a twilight state along the terminator line, which is where the twilight zone is frequently referred to as. The sun is either rising or setting on the moon along this line.
Thus, we only view a portion of the lighted part of the Moon because of how the Moon rotates around the Earth.
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BRAINLIST!!!!! (IF BOTH ARE ANSWERED)
Answer:
Action Force was the ball falling on the ground, the reaction force was it bouncing back up.
You see the first arrow pointing back, because the swimmer is pushing back against the wall. The second arrow would be pointing the other way, because the swimmer will extend their legs, pushing away from the wall.
Explanation:
2NH4Cl(aq) + CaO(s) —> __H2O (l) + CaCl2 (aq)
which expression completes the balanced equation?
A rock with different fossils is shown below:
A diagram labeled Fossil Layers is shown. The topmost layer is labeled Fish and shows the skeleton of a fish, the second layer from the top is labeled Shell and shows a shell, the third layer from the top is labeled Fern and shows a fern leaf, and the lowermost layer is labeled oak and shows an oak leaf
Based on the fossil, which organism evolved first?
Fern
Fish
Oak
Shell
Why do lows appear where there are more clouds and Highs appear where it is clear? (EXPLAIN)
Which unit conversion allows you to convert 21.0 gallons into milliliters?
Some English and English-metric unit relationships: 1 liter = 1.057 quarts, 1 gallon = 4 quarts
Answer:
Explanation:
we are given
there are in 0.073 gallons
we can see that there are two non-zero places after decimals
so, there are two siginificant figures
step-1: Change gallons to quarts
we know that
1 gallon = 4 quarts
so, we can write as
step-2: Change into liter
we know that
1 liter = 1.057 quarts
or
step-3: Change into millilitre
we know that
Since, it is asking for only two significant figures
so, we can also write as
...................Answer
Complete the sentences to identify the difference between a nonmetal atom and its anion.
In an anion, there are more *blank* than *blank*, giving the anion a *blank* charge.
In nonmetal atoms, the number of *blank* and *blank* are the same and there is a *blank* charge.
key bank:
- a positive
- no net
- electrons
- protons
- a negative
- neutrons
Answer:
more protons than neutrons and the number of electrons and blank are blank
Explanation:
The complete sentences that distinguish the difference between a nonmetal atom and its anion are as follows:
In an anion, there are more electrons than protons, giving the anion a negative charge. In nonmetal atoms, the number of protons and neutrons are the same and there is a negative charge. What are Non-metals?Non-metals may be defined as the type of chemical element that lacks the characteristics of a metal. They do not show any metallic attributes. But in the periodic table, they range from colorless gases to shiny and high melting point solids.
In the whole periodic table, elements are classified into three parts. They are metals, non-metals, and metalloids. Each classification has its own attributes and characteristic properties.
The non-metals significantly gain electrons due to their stronger nuclear charge and become negatively charged anions.
Therefore, the complete sentences that distinguish the difference between a nonmetal atom and its anion are appropriately described.
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What happens to the reaction rate as the reactants get used up in a reaction?
O
A. The rate of the reaction is not affected by the concentration of
reactants.
B. The rate of the reaction increases steadily as products are formed.
O
O
O
C. The rate of the reaction begins to decrease as reactants are used
up
O
D. The rate of the reaction stays constant until the reactants are
gone.
The rate of the reaction depicts the speed at which the reaction occurs to produce the products. As the reactants get used up the reaction rate starts decreasing. Thus, option C is correct.
What are the factors affecting reaction rate?
The reaction rate of the chemical reaction gets affected by numerous factors that include temperature, the concentration of the reactants, catalyst, surface area, and physical state of the reactant.
The concentration of the reactant has a direct effect on the reaction rate as they are the deciding factor of the product formation. At the beginning of the reaction, the speed is fast compared to the end.
As the reactants start getting used up the reaction rate slows down as the molecules are not able to collide faster with other molecules to form the product.
Therefore, in option C. the reaction rate decreases with a decrease in concentration.
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ugh help i have to write a 1 -page essay for my honors sci class
and i have no clue how to its over Photosynthesis but we have to have answer to these questions in it to :(What is photosynthesis? What role does the Sun play in the interaction of energy during photosynthesis? What forms of energy conversion occur? What form does the chemical energy take? What gas do plants release as a result?): so i have no clue how to write it .?.?.?.?.?.?
.
Answer:
1 . Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.
2. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch. Cellulose is used in building cell walls.
3.Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.
4 . Chemical energy is stored in the bonds that connect atoms with other atoms and molecules with other molecules. Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released.
Explanation:
Key deer are found on the islands of the Florida Keys and feed on the native trees. Which is most likely to happen to populations of Key deer if the forests are cleared where they live?
Their populations will increase because of an increase in open space.
Their populations will decrease because of a decrease in usable habitat.
Their populations will move to the mainland and disappear from the islands.
Their populations will adapt to the new habitat and they will become a new species.
Answer:
Their populations will decrease because of a decrease in usable habitat.
Explanation:
Which statement best describes the motion of
the dye molecules in the water?
The dye molecules
o move in a directed way from high to low
concentration.
o move randomly through collisions in no
particular direction.
stay close to other dye molecules as they
move through the water.
Low
Check ansive
Answer:The statement that best describes the motion of dye molecule in water is directed from a region of high to low concentration. The motion of the particles of the dye in water is described as diffusion: diffusion is the movement of molecules of a substance from one position to another.
Explanation:
Option A is correct. The statement that best describes the motion of the dye molecules in the water is "the dye molecules move in a directed way from high to low".
The motion of dye molecules in water is known to be random. Another name for random motion is Brownian motion and since diffusion is also Brownian motion, hence we can term the motion of the dye molecules in the water as "diffusion".
The water is held together by intermolecular forces and these forces are the ones that attract the molecules of the die carrying them away and making the process of molecular transport of the dye to be accelerated (moving from a region of high concentration to low concentration).
In conclusion, the statement best describes the motion of the dye molecules in the water is "the dye molecules move in a directed way from high to low".
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True or False: You can find the mass of the products by adding the mass of the reactants together
Answer:
k
Explanation:
How do microorganisms influence the chemical characteristics of soil? Explain Please.
Answer:
Soil microbes are also important for the development of healthy soil structure. ... Soil microorganisms are both components and producers of soil organic carbon, a substance that locks carbon into the soil for long periods. Abundant soil organic carbon improves soil fertility and water-retaining capacity.
Explanation:
Soil microbes are also important for the development of healthy soil structure. ... Soil microorganisms are both components and producers of soil organic carbon, a substance that locks carbon into the soil for long periods. Abundant soil organic carbon improves soil fertility and water-retaining capacity.
Okay science but it wasnt in the subjects
Can someone watch this and awnser this question
https://youtu.be/Bn41lXKyVWQ
What are the FOUR major biogeochemical cycles upon which all life depends?
The ___ is the short form that chemists use to identify an element
Answer:
Chemical Symbols
Explanation:
Im not positive on this one so dont rely on me lol
Which statement best discribes the usual form and funtion of a plants root system
Answer:
The chemical energy is used to form ATP bonds. ... Which statement best describes the relationship between the products of photosynthesis ... Usually sap quickly covers the wound, and then the tree covers the wound with new growth
Explanation:
Order these by size/complexity in descending order. (largest/most complex on top) Reorder answers
1. DNA Reorder answers
2. Cells Reorder answers
3. Atoms Reorder answers
4. Chromosomes ODER THEM PLEASE!!
Answer:
1)Cells
2)Chromosomes
3)DNA
4)Atoms
Explanation:
What happens to temperature when there is a State of Change
Match the term with its description.
answer choices
Aerobic respiration
Alcoholic fermentation
Anaerobic respiration
Lactic acid fermentation
The production of energy without the presence of oxygen
A process that converts sugars into cellular energy, ethanol, and carbon dioxide
A process that converts sugars into cellular energy, ethanol, and carbon dioxide
The breakdown of food to create energy in the presence of oxygen
Answer:
Aerobic respiration is metabolic process in which food ( glucose) is metabolized ( in presence of oxygen) to derive large amount of energy ( in the form of ATP) through a series of three stages that is glycolysis, kreb cycle, and electron transport chain.
Anaerobic respiration another from of cellular respiration where food is broken down to derive energy in the absence of oxygen.
Alcoholic fermentation is a metabolic process by which sugar is converted into cellular energy ( in the form of ATP), ethanol, and carbon dioxide.
Lactic acid fermentation is a metabolic process by which glucose is converted into cellular energy and lactic acid.
Thus, the correct match is-
Aerobic respiration- A) The breakdown of food to create energy in the presence of oxygen.
Alcoholic fermentation- C) A process that converts sugars into cellular energy, ethanol, and carbon dioxide.
Anaerobic respiration- B) The production of energy without the presence of oxygen.
Lactic acid fermentation- D) A process that converts glucose into cellular energy and lactic acid.
Explanation:
Answer:
Aerobic respiration – The breakdown of food to create energy in the presence of oxygen
Alcoholic fermentation – A process that converts sugars into cellular energy, ethanol, and carbon dioxide
Anaerobic respiration – The production of energy without the presence of oxygen
Lactic acid fermentation – A process that converts glucose into cellular energy and lactic acid
view pics for proof :)