how do substances change into different substances during chemical reactions
Answer:
Chemical reaction are irreversible. Some of the example of chemical reaction are cooking, rusting, and burning. During a chemical reaction, the composition of substances changes and the particles rearrange to form a new substance. The new substance formed after chemical reaction of substance has different physical and chemical properties.
When a chemical reaction occur, the atoms or molecules of the substances change its physical and chemical properties such as while cooking of vegetable, the molecules of vegetable undergo changes in their properties and form a new substance which is different from the earlier.
The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide?
Report your answer with the correct number of significant figures.
Answer:
Area = 51.74cm ²
Explanation:
5.6 × 9.4 = 51.744
Round above answer
= 51.74
HELP ME THE WHOLE PAGE !!!! Someone help please
Answer:
In the image below
Explanation:
Hope this helps you :)
How do you find the number of neutrons from a nuclide symbol?
Subtract the atomic number from the mass number.
Add the atomic number and the mass number.
Multiply the atomic number and the mass number.
Divide the mass number by the atomic number.
subtract the atomic number from the mass number
hope that helps^^
Atmosphere pressure is about 100000 Pa. Calculate the force of the Atmosphere on a person whose Surface area is 2.0m
Answer:
The force of the atmosphere 200 KN.
Explanation:
Pressure is the ratio of force applied to the area to which the force is applied.
i.e Pressure = [tex]\frac{Force}{Area}[/tex]
But, Pressure = 100000 pa (100000 N/ [tex]m^{2}[/tex]), and surface area = 2.0 [tex]m^{2}[/tex]
Thus,
100000 = [tex]\frac{Force}{2.0}[/tex]
⇒ Force = 100000 x 2.0
= 200000
Force = 200 KN
The force of the atmosphere 200 KN.
what events are typically earthquakes near large bodies of water
Answer:
tsunamis
they are literally water earthquakes that force tons of water ashore and wipes out cities and towns
Elements that do not have full outer electron shells will donate, share, or take from other atoms. Choose the items that have the correct binary ionic formula. (brainliest)
Answer:
Ok...
Answer: YTH/JYG
Explanation:
AI+ZN+H=YTH
Answer:Potassium and sulfur form KS2
Sodium and calcium form Na2Ca
Beryllium and nitrogen form Be3N2
Explanation:
i took the quiz
what's the FM of chlorine
Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
Zinc has a density of 7.10 g/cm3. If a cylinder of zinc weighing 46.77 g is completely immersed in a graduated cylinder that originally contains 33.33 mL of water, what will be the new water level? PLEASE HELP!!!! I NEED TO TURN THIS IN SOON!
The Density of a substance is simply defined as the mass of the subtance per unit volume of the substance i.e
Density = mass /volume
To solve the question given above, we'll begin by calculating the volume of the zinc. This can be obtained as follow:
Density of Zinc = 7.10 g/cm³
Mass of Zinc = 46.77 g
Volume of Zinc =?Density = mass /volume
7.10 = 46.77 / Volume
Cross multiply
7.10 × Volume = 46.77
Divide both side by 7.10
Volume = 46.77 / 7.10
Volume of Zinc = 6.59 cm³Finally, we shall determine the new volume of the water. This can be obtained as follow:
Volume of Zinc = 6.59 cm³ = 6.59 mL
Volume of water = 33.33 mL
New volume of water =?New volume of water = (Volume of Zinc) + (Volume of water)
New volume of water = 6.59 + 33.33
New volume of water = 39.92 mLTherefore, the new volume of water is 39.92 mL
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How do acid, base, and salt differ?
Calcium and Gold (III) Bromide react. Will this reaction proceed?
If it does proceed, write the balanced chemical equation below.
I need help ASAP please
Answer:
water cycle
air pressure
Explanation:
Answer:
Should be water cycle, solar radiation, and air pressure!
Which of these statements is false?
A.
Atoms of different elements can combine to form compounds.
B.
Oxygen and copper are examples of elements.
C.
Atoms of different elements are the same.
D.
Elements are pure substances.
Answer:
Answer is C atoms of different elements are the same
What is the solute and solvent in a solution of salt water?
Select one:
a.Water is the solvent; Salt is the solute
b.Water is the solvent; Salt is the solvent
c.Water is the solute; Salt is the solute
d.Water is the solute; Salt is the solvent
Answer:
A
Explanation:
solute- thing being disolved
solvent- thing doing the disolving
so water is a solvent and salt is solute.
which is A
if my answer helps please mark as brainliest.
In the solution of salt and water, Water is the solvent; Salt is the solute. That is option A.
What is a solute and a solvent?A solute is defined as the part of a solution that is being dissolved by the solvent. A typical example of solute is base and salts.
A solvent is defined as the dissolving part of a solution which is usually liquid in form. A typical example is water.
Therefore, the solute and solvent of a solution would be salt and water respectively. That is option A.
Learn more about solvent here:
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can someone help me pls
Answer:
The heat would flow from the hot solid to the cool solid until all temperatures are near equal.
Atomic number of Sodium?
Answer:
11
Explanation:
Answer:
Atomic number of sodium is 11.
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na. The free metal does not occur in nature, and must be prepared from compounds.
name the following compound Hg2S
how much force is required to accelerate an 1,800 kg truck at 3 m/s/s
Answer:
3 ÷1,800
= 600 N
Thus the force needed is 600N
What is the proper attitude with which you should approach a laboratory experience
the awnser is : b serious
What are valance electrons used for?
Answer:
In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
What is the formula for manganese (IV) bromide?
Answer:
MnO₂
Explanation:
Plants carry out photosynthesis to make sugar from carbon dioxide and water.
True or false?
Answer:
la re spuesta en verdadero
Answer:
True
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
The equation shows the reaction between magnesium and chlorine to produce magnesium chloride.
Mg + Cl2 → MgCl2
Magnesium chloride consists of Mg2+ and Cl− ions.
Describe, in terms of electrons, how magnesium chloride is produced from magnesium and chlorine.
Answer: Mg is a cation and Cl is an anion
Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1
Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
How is magnesium chloride formed from magnesium and chlorine?Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.
A Magnesium atom forms ion by giving up two electronsTwo Chlorine atoms become ions by accepting one electron each.The oppositely-charged ions are attracted to each other.Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
Learn more about ionic compound at: https://brainly.com/question/13690700
How many moles are in 12.15 g of Mg?
(2 decimal places)
[tex]12.15 \: g \times \frac{1 \: mol}{24.305 \: g} = 0.4998971405 \: mol[/tex]
[tex] = 0.50 \: mol[/tex]
What eventually happens to all the energy in a food web? The energy in a food web finally??????
Answer:
All of the consumers and producers eventually become nourishment for the decomposers.
Explanation:
Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.
Help, please I’m very confused
Answer:
chemical is fire
and ductility is physical
Explanation:
give me brainliest please
What is true about the particles in a substance? Select all that apply.
Particles in all states of matter are arranged close
together.
Heating a substance can cause the substance to
change state.
The way particles move changes when the
substance's thermal energy changes.
Particles in all states of matter are constantly
moving.
Submit
Answer:
Heating a substance can cause the substance to change state
The way particles move changes when the substance's thermal energy changes.
Particles in all states of matter are constantly
moving.
Those are all correct and apply to water in all three phases
A balloon occupies 1.50 L with 0.205 mol of carbon dioxide. How many moles would be required to increase the size of the balloon to 5 L?
Answer:
0.683 moles of the gas are required
Explanation:
Avogadro's law relates the moles of a gas with its volume. The volume of a gas is directely proportional to its moles when temperature and pressure of the gas remains constant. The law is:
V₁n₂ = V₂n₁
Where V is volume and n are moles of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
1.50Ln₂ = 5L*0.205mol
n₂ = 0.683 moles of the gas are required
Energy is absorbed when a material ________ and is released when a material _______.
A. evaporates, melts
B. freezes, melts
C. melts, freezes
D. freezes, condenses
0.265g of an organic compound produced on evaporation 102cm cube of vapour at 373K and 775mmHg. Percentage composition of the constituent elements are 92.24% C and 7.76% H. Find the molecular mass and molecular formula of the composition.
Answer:
No results found for 0.265g of an organic compound produced on evaporation 102cm cube of vapour at 373K and 775mmHg. Percentage composition of the constituent elements are 92.24% C and 7.76% H. Find the molecular mass and molecular formula of the composition..
Results for 0.265g of an organic compound produced on evaporation 102cm cube of vapour at 373K and 775mmHg Percentage composition of the constituent elements are 92.24 C and 7.76 H Find the molecular mass and molecular formula of the composition
Answer:
Using PV=nRT
since [tex]n. \: no \: of \: moles= \frac{mass}{molar \: mass} [/tex]PV= nRT
P=775mmhg/760mmhg
P=1.01atm
so,n=PV/RT
n= (1.01*0.102)/(0.0821*373)
n= 0.00339mole
n =mass/ molecular mass
molecular mass =0.265/0.00339
molecular mass= 78.17
empirical formular = C. H
C= 92.24. 92.24/12= 7.688
H= 7.76. 7.76/1=7.76
therefore Empirical formula is CH
(CH)n=78.16
(12+1)n=78.14
n=78.14/13
n= 6.01
therefore, molecular formula is
C6H6