Answer:
too simple question i don't have book pen now otherwise solved it
What function does a cell wall serve for a plant?
It provides the plant cell with structure and support, along with protection from bursting due to turgor pressure
Explanation:
During the formation of the compound sodium chloride, the correct symbol and charge for each of the ions must be...
O Na+1 and Cl-1
O Na+1 and F-1
O Na+1 and Br-1
O Na+1 and O-2
Answer : The correct symbol and charge for each of the ions must be [tex]Na^{+1}[/tex] and [tex]Cl^{-1}[/tex].
Explanation :
Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.The covalent compound are usually formed when two non-metals react.
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.
As we know that the sodium chloride is an ionic compound in which sodium is an alkali metal and has one valence electron and chlorine is a non-metal and has 7 valence electrons.
When sodium atom donates an electron to a chlorine atom then it forms an ionic compound that is sodium chloride (NaCl) and the resulting positive ion [tex]Na^{+1}[/tex] and negative ion [tex]Cl^{-1}[/tex] form a stable ionic compound.
Hence, the correct symbol and charge for each of the ions must be [tex]Na^{+1}[/tex] and [tex]Cl^{-1}[/tex].
What is the balanced equation for the reaction of a solution of sodium sulfate is mixed with strontium chloride?
Select one:
a.Na2SO4(aq) + SrCl2(aq) = 2 NaCl(aq) + SrSO4(s)
b.Na2SO4(aq) + SrCl2(aq) = NaCl(s) + SrSO4(aq)
c.NaSO4(aq) + SrCl(aq) = NaCl(aq) + SrSO4(aq)
d.NaSO4(aq) + SrCl(aq) = NaCl(aq) + Sr2SO4(aq)
Answer:A
Explanation: reactants: Na2SO4 and SrCl2
Products: NaCl and SrSO4
What does adding a catalyst to a reaction do?
Select all that apply.
increase the amount of each product formed by the reaction
lower the activation energy of the reaction (correct)
alter the orientation of reactants in the reaction
increase the rate of the reaction (correct)
yes both B and D are correct
Catalysts lower the activation energy of the reaction therefore, the rate of reaction will increase. Therefore, option B, D are correct.
What is a catalyst?Catalysis can be defined as the process of enhancing the rate of a reaction by adding a substance or chemical compound known as a catalyst. Catalysts are usually not consumed in the chemical reaction and can be recovered unchanged after the completion of the reaction.
The catalyst can be recycled quickly, and little amounts of catalysts are sufficient for mixing, temperature, and surface area are factors in the reaction rate. The catalyst reacts with one or more reactants to generate intermediates that provide the final product.
The addition of a catalyst can lower the activation energy of reactant molcules, therefore, increasing the rate of the reaction. Because catalysts increase in frequency the successful collision as more reactant molecules have activation energy.
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A solution has a pOH of 12. Which best describes the solution?
Answer:
The solution is acidic.
Explanation:
The nature of solution will be acidic.
What is solution?A solution is just a uniformly dispersed mixture of more than solutes in a solvent.
What is acidic?In nature, chemical species with a pH value between. are termed acidic. Acidic substances have a sour flavor in general. In the beginning, acid was defined as a sour substance that interacts with metal as well as turns blue litmus red.
Calculation of pH.
Given data:
pOH = 12
The nature of the solution can be calculated by pH formula.
pH+ pOH = 14
Put the value of pOH in above expression.
pH = 14-pOH
pH = 14-12
pH = 2.
Hence, the nature of the solution will be acidic.
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In pea plants the trait for green sea pods ( G) is dominant over the trait for yellow seed pods (g) which cross will produce the maximum number of offspring with green sea pods?
Answer:
See the answer below
Explanation:
The cross that would produce the maximum number of offspring with green sea pods would be:
1. GG x GG, or
2. GG x gg
The first one would produce all green offspring with homzygous genotypes as follows:
GG x GG
GG GG GG GG
The second cross would produce all green offspring with heterozygous genotypes as follows:
GG x gg
Gg Gg Gg Gg
What is an atomic number ?
Explanation:
the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table
Which of the following is an example of a compounds?
Select one:
a.Cu
b.CaCl2
c.Na
d.Nd
Answer:
b. CaCl2
Explanation:
It consists two elements
The substance that can be said to be a compound would be = CaCl2. That is option B.
What is a chemical compound?A chemical compound is defined as the substance that is made up of two or more elements that are chemically combined together.
Typical examples of chemical compounds include the following:
Molecular compounds: These are made up of two elements such as NaCl, CaCl2, H2O.Ionic Compound. Intermetallic Compounds. Coordinates Compound.Learn more about chemical compounds here:
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Sodium atomic radius 1.90
magnesium atomic radius 1.60
aluminium atomic radius 1.32
(a) Explain the trend in the atomic radius across the period.
(b) Predict the the P.H of the solution of sodium Oxide.
Answer:
For a: The increasing of atomic radius is:
Al < Mg < Na
For b: The pH of the solution of sodium oxide is greater than 7.
Explanation:
For (a):Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.
It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.
Sodium lies in Period 3, group 1. Its atomic radius is 1.90
Magnesium lies in Period 3, group 2. Its atomic radius is 1.60
Aluminium lies in Period 3, group 3. Its atomic radius is 1.32
The increasing of atomic radius will be:
Al < Mg < Na
The mathematical values proves the result.
For (b):There are 3 types of solution based on pH:
If pH > 7, the solution is basic in nature. If pH < 7, the solution is acidic in nature.If pH = 7, the solution is neutral in nature.When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.
The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:
[tex]4Na+O_2\rightarrow 2Na_2O[/tex]
[tex]Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}[/tex]
Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.
Which element, when combined with fluorine, would most likely form an ionic compound
What forces typically hold nonmetal atoms together within a molecule?
A. Metallic bonds
B. Covalent bonds
C lonic attractions
D Intermolecular forces
Answer:
B - Covalent bonds
Explanation:
Covalent bonds are a class of chemical bonds where valence electrons are shared between two atoms, typically two nonmetals. The formation of a covalent bond allows the nonmetals to obey the octet rule and thus become more stable.
If earths glaciers were to melt what would be the most likely effect in florida
Answer:
Well if glaciers were to most likley melt wit would have a big affect on the world. But on Florida the affect would be as everybody would expect, a flash flood, with high water's and everything under water. AND there would most lilkley be something in the glacier. Not highly sure about it though
Explanation:
Hope this helps!
Pls mark brainlest!
I will not be cooking ever again
Lm/aooooo was that supposed to be a quesadilla?
Answer:
why it just a mistake everyone make a mistake i belive in you.
Explanation:
Balance this chemical equation
Select the correct answer. Which notation is used to represent a beta particle?
Explanation:
I think the notation used to represent beta is B
Answer:
[tex]\frac{0}{-1} \beta[/tex]
Explanation:
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]
Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.
Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.
~Wikipedia
Describe the general
trends for ionic radius.
5. What is the molar mass of ethanol (C2H5OH)?
A) 45.06 g/mol
C) 30.03 g/mol
B) 34.06 g/mol
D) 46.07 g/mol
The molar mass is given by the sum of the atomic masses of the component elements of the substance.
In our case, the substance is ethanol or C₂H₅OH.
[tex]A_C=12.011 [/tex]
[tex] A_H=1.0079 [/tex]
[tex] A_O=15.9994[/tex]
[tex]\mathcal M_{C_2H_5OH} = 2 \times A_C + 6 \times A_H + A_O = 2 \times 12.011 + 6 \times 1.00079+ 15.999 4= 24.022 + 6.0474 + 15.9994= 46.069≈ \boxed{46.07 \dfrac{g}{mol}}[/tex]
What is the theoretical yield, in grams, and the percent yield of a reaction of 3.0 moles of two hydrogen atoms and 2.0 moles of Iodine atoms to produce one mole of Hydrogen Iodine.
Answer:
512g, 25%
Explanation:
H_2+I_2→ 2HI
3 moles H_2× 2moles HI/1 mole of H_2= 6 moles of HI
2moles I_2×2 moles of HI/1 mole of I_2= 4 moles of HI
Now, theoretical yield of HI = 4 moles ×128 g/ mole = 512 g
percentage yield = (128g/512g)×100 = 25%
The distance an object is off the ground or from the bottom.
Group of answer choices
Weight
Height
Acceleration
Gravitational Potential Energy
Answer:
height is the answer
Explanation:
none of the others work
The breakdown of proteins produces:
A. Carbon Dioxide
B. Urea
C. Water
D. Glucose
Answer:
Glucose
Explanation:
hope it helps
1. A gas at 24.0 Celsius and.900 atm fills a 0.95 Liter container.
What is its ending pressure (in atm) if the temperature changes
to 75 Celsius? Show all your work.
Answer:
P₂ = 1.05 atm
Explanation:
Given data:
Initial temperature = 24.0 °C (24+273 = 297 K)
Initial pressure = 0.900 atm
Final pressure = ?
Final temperature = 75 °C (75 + 273 =348 K)
Volume = constant
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
0.900 atm / 297 K = P₂/348 K
P₂ = 0.900 atm × 348 K / 297 K
P₂ = 313.2 atm. K /297 K
P₂ = 1.05 atm
Substance X is a compound containing 632mg of manganese and 368mg of oxygen. Substance X is shown
below. Manganese has a relative atomic mass of 55 and oxygen has a relative atomic mass of 16. What is the
value of y in the formula below?
The empirical formula : MnO₂.
Further explanationGiven
632mg of manganese(Mn) = 0.632 g
368mg of oxygen(O) = 0.368 g
M Mn = 55
M O = 16
Required
The empirical formula
Solution
You didn't include the pictures, but the steps for finding the empirical formula are generally the same
Find mol(mass : atomic mass)Mn : 0.632 : 55 = 0.0115
O : 0.368 : 16 =0.023
Divide by the smallest mol(Mn=0.0115)Mn : O =
[tex]\tt \dfrac{0.0115}{0.0115}\div \dfrac{0.023}{0.0115}=1\div 2[/tex]
The empirical formula : MnO₂
Write an ionic equation for the reaction of zinc and dilute hydrochloric acid, include state symbols.
Explanation:
When zinc reacts with dilute hydrochloric acid, it is a metal-acid reaction to produce zinc chloride and hydrogen gas.
Zn (s) + 2HCl (aq) => ZnCl2 (aq) + H2 (g)
Ionic equation:
Zn2+ (aq) + 2Cl- (aq) => ZnCl2 (aq)
All of the elements in the actinide family are ?
(liquids/radioactive).
Answer:
Radioactive
Explanation:
:D
Answer:
c-Radioactive
Explanation:
A bottle of H3PO4 contains 30.00 g, how many moles are in this container?
Moles in the container : 0.306
Further explanationGiven
30 g of H3PO4
Required
moles in container
Solution
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
1 mole = 6.02.10²³ particles
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol
mol = mass : MW
mol = 30 : 98
mol = 0.306
in the group the reactivity of metals increases? give example
Answer:
As sodium and potassium both are alkali metals that belong to Group IA of the periodic table. They have one valence electron in their valence shell. As we move from top to bottom, the reactivity of metallic elements of Group IA increases.
Name the following compound with a polyatomic ion: Na₂SO₄ *
Answer:
sodium sulfate
Explanation:
For naming an ionic compound with polyatomic anion, the metal is written first using its element name followed by name of the polyatomic anion. Therefore, the compound with Na+Na+ cation and SO2−4SO42− anion is named as sodium sulfate.
1.) Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information,
what is the mass number?
Answer:
Explanation:
47 i took the test
Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information, the mass number of the silver would be 107.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
As given in the problem Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom.
The atomic number of the silver = number of protons
= 47
The mass number of the silver = number of protons + number of neutrons
=47 + 60
=107
Thus, based on the given information the mass number of the silver would be 107.
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Which mineral is used in batteries
Batteries come in all shapes and sizes, and depending on the type of battery, the minerals that compose them are mainly lithium, cobalt, graphite, nickel and manganese.
3. (04.02 MC) Which component is missing from the process of photosynthesis? Carbon Dioxide + Water + ________ Glucose + Oxygen
Sunlight
Sugar
Plants
Carbon
Answer:
Sunlight
Explanation:
Sunlight is always neccesary in photosynthesis
Answer:
Carbon Dioxide + Water + Sunlight → Glucose + Oxygen.
Explanation: