Answer:
It shows the most reactive to least reactive, so that we can predict whether certain reactions will occur. Any metal can replace any metal below it, but not above it.
Explanation:
1. The activity series is a type of ordering system for elements, which ranks how reactive a certain element is in relation to other elements.
2. The activity series determines the level of reactivity based on how well a certain element can displace hydrogen gas from acidic solutions and water.
3. The activity series of metals is an empirical tool used to predict products in displacement reactions and reactivity of metals with water and acids in replacement reactions and ore extraction.
4. It can be used to predict the products in similar reactions involving a different metal.
5. It helps in predicting whether a reaction will occur, and if so what the product will be.
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BRAINLIST!!!
Water moving along the water cycle also moves through the Earth's environment in the form of rain, ice, snow, and surface water. This water has helped to shape the Earth's surface by which of the following processes?'
radioactive decay
chemical weathering
dissolving
physical weathering
oxidation
Answer:
I believe it is chemical weathering, physical weathering, oxidation, and dissolving...
Explanation:
(c) When a radioactive isotope decays it can produce beta particles.
What is a beta particle?
Explanation:
Beta particles are of two types - negative beta particles or negatrons and positive beta particles or positrons which are both formed from some nuclear processes within the nucleus.
A negatron is like an orbital electron but it has more energy compared to an orbital electron.
A positron is essentially the same as a negatron except in the charge it carries. A positron carries positive charges.
A beta particle is very light and has much range through matter.
Which of the following is not a trend that varies systematically in the periodic table
A ) electronegative
B) Symbol of elements
C) ionization energy
D) atomic radius
E) Ionic radius
Answer: B: Symbols of Elements
Explanation:
The periodic table is a table of chemical elements that shows us the trends and characteristics of the elements. The periodic trends are a specific pattern of the major and minor elements.
The trends are shown by the electronegativity, ionization energy, electronic affinity, ionic radius, atomic radius, and chemical reactivity. This trend arises from the changes in the atomic structure of the chemical elements.This pattern is based on the periodic laws and states that the chemical elements are put in order of increasing atomic number. However, they don't follow the symbols of elements.Hence the option B is correct.
Learn more about the is not a trend that varies systematically in the periodic table.
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1. What does the Law of conservation of mass state?
a. According to the Law of Conservation, what is true about the masses of the reactants and the products in a chemical reaction?
b. Find the missing mass in the reactions below:
MgO + H2O → Mg(OH)2
12.4 g ? 21.8
Answer:
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
A barometer is a tool that scientists use to measure dew point , rainfall amounts, temperature, air pressure helppppp
Answer:
All of that is correct i am confused on what u are asking us to answer
Explanation:
Answer:
A barometer measures atmospheric/ air pressure ( D)
Explanation: I researched this topic prior to answering the following question.
Given 5 moles of O2 How many moles of H2O
Moles of H2O = 10 moles
Further explanationGiven
5 moles O2
Required
Moles of H2O
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
Reaction make water
2H2 + O2 → 2H2O
From the equation, mol ratio O2 : 2H2O = 1 : 2 so moles H2O :
= 2/1 x moles O2
= 2/1 x 5 moles
= 10 moles
PLEASE HELP: I’ll give Brainliest and 15 points
Answer:
D. 70
Explanation:
NEED HELP NOW!!!!!! Suppose two chemicals are reacted together. It takes 600 kJ of energy to break the bonds of the reactants and 950 kJ of energy are released by the formation of the products. What is AH for the reaction?
O kJ
0-600 kJ
600 kJ
-350 kJ
Answer:
600 kj
Explanation:
thats just the answerr
Click on the graph to show how rate of reaction is usually related to activation energy
Which one
Answer: Graph 3
Explanation:
Activation energy is the level of energy required by a chemical reaction for the reaction to proceed.
A higher Activation energy will translate to a lower reaction rate because less molecules will be able to achieve this required energy needed for them to react. A lower activation energy however will enable a faster reaction time because more molecules will achieve the required energy.
Higher Activation energy = Lower Reaction rate
Lower Activation energy = Higher reaction rate
This is what Graph 3 shows so it is correct.
Look at the chemical equation
and IDENTIFY what type of reaction is
occurring
CaS --
--> Ca + S
O Decomposition
O Double Replacement
O Combustion
Single Replacement
Synthesis
Answer:
it is a decomposition reaction
An object of mass 800g hangs on a spring.Calculate the force exerted by the object if acceleration due to gravity is 10meters per second square
The force exerted : 8 N
Further explanationGiven
mass = 800 g
Acceleration = 10 m/s²
Required
The force exerted
Solution
Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
∑F = m. a
[tex]\large {\boxed {\bold {a = \frac {\sum F} {m}}}[/tex]
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
Input the value :
F = 0.8 kg x 10 m/s²
F = 8 N
In a modern periodic table the element are arranged in order of increasing
Answer:
what are you asking?
Explanation:
True or false: Oceans have no effect on the temperature on Earth’s land???
Answer:
false
Explanation:
how many molecules are in .5 moles of water
Answer:
Great question
Explanation:
Answer:
A mole is about 6.022 * 10^23 of anything. So half a mole of water molecules is 3.011 * 10^23 molecules of water. 0.5 x 6.022 x 10^23 molecules of water.
Explanation:
Complete the sentence: electrons surround the nucleus of an atom in fixed ____________ ____________.
Answer:
shell ,orbit , this is the answer of this qn
Marisol mixed two samples together: a brown liquid with no smell and a colorless gas that smells irritating. She analyzed the results and found two ending substances One of the ending substances smelled sweet. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Marisol mixed together?
(I drew that because it wasnt showing it on the screen)
Answer:
B.
Explanation:
Diagram B shows the repeating groups of atoms that make up the samples Marisol mixed together.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
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How does the molecular formula of a compound differ from the empirical formula? Can a compound’s empirical and molecular formulas be the same? Explain.
Which of the following represents a neutralization reaction which hydrofluoric acid and sodium hydroxide(a base) react to produce sodium choride(a salt) and water? 
Explanation:
A neutralization reaction is a reaction that involves an acid and a base.
When an acid reacts with a base to produce salt and water only, the reaction is said to be a neutralization reaction.
Acid + Base → Salt + Water
Such reactions are classified as a double displacement reaction in which a non-ionizing product is formed
how many vitamin c tablets is 250mg? (i’ll give brainliest)
An element whose particles are atoms
Answer:
a chemical element
Explanation:
A chemical element is a substance that contains only one type of atom
For the balanced equation shown below, if the reaction theoretically
should produce 7.99g CaO but experimentally produces 6.81 grams of
CaO, what is the percent yield?
CaCO3---->CaO+CO2
85.23%
0 14.77%
54.41%
O 117.33%
Answer:
Percent yield = 85.23%
Explanation:
Given data:
Theoretical yield = 7.99 g
Actual yield = 6.81 g
Percent yield of CaO = ?
Solution:
Formula:
Percent yield = ( actual yield / theoretical yield ) × 100
by putting values,
Percent yield = (6.81 g/ 7.99 g) × 100
Percent yield = 0.8523× 100
Percent yield = 85.23%
Chemical properties describe matter based on its ability to change into___
A. A new substance
B. The same thing
C. Water
D. A powder
Answer:
A. A new substance
Explanation:
sorry if its wrong if its right your welcome <3
How many moles is 0.025 g of NaCO3? (Show Your Work)
mol of Na2CO3 = 2.36 x 10⁻⁴
Further explanationGiven
Mass : 0.025 g of Na2CO3
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
mol = mass : molar mass
mass = mol x molar mass
Input the value :
mol = mass : MW Na2CO3
mol = 0.025 g : 106 g/mol
mol = 2.36 x 10⁻⁴
Which of the following shows the proper configuration of a straight chain isomer of nonane?
A.)A
B.)B
C.)C
Answer:
I need help with this as well if you get the answer please let me know
Explanation:
I need help with this one question
Answer:
colder
Explanation:
How many chemical changes can something go through
Answer:
Only one
Explanation:
SrBr2 lewis structure
Answer:
Okay?.......................
Α. Helium (He)
В. Beryllium (Be)
C. Phosphorus (P)
D. Sulfur (S)
Answer: d
Explanation:
9. John checked his car tire volume when the temperature outside was 80 °F. He was
happy to see that the tires were inflated properly to 10 L. The temperature the next
day was a record low for the time of year he was in. He noticed that his tires all
looked sort of flat. He checked the volume again and found the volume of air was
half what it was the day before. What temperature was the record low?
does anybody know the answers to these 3 question???
Answer:
Answer is C.
Explanation:
I hope it's helpful!