Answer:
A
Explanation:
Answer:
A
Explanation:
In order to balance an equation,the number of atoms of elements on the right side must equal the number of atoms of the same elements on the left side.After balancing the equation,C has 1 atom on both the left and right side,H has 4 atoms each on both sides of the equation and O has 4 atoms each on both sides of the equation,hence balanced.
4. Which of the following statements correctly describe atoms? Select all that apply.
A)Atoms have mass,
B)Atoms are the basic unit of a chemical element.
C)Matter is made of atoms.
D)Atoms take up space.
Answer:
all of the above
Explanation:
adams take up space they take up mass they are the basic chemical unit and matter is made of adams
Answer:
All of them except "Elements are the basic unit of atoms."
Explanation:
I took the quiz :D
Determine the name for P4010.
Answer:
Technically, the name for P4o10 is Tetraphosphorus Decaoxide, but most people call it Phosphorus Pentoxide
Explanation:
Tetraphosphorus Decaoxide is a chemical compound. The molecular formula for this compound is P4o10. But, under normal conditions, it is actually a dimer of P205, which is Phosphorus (V) Oxide, or Phosphorus Pentoxide.
To solve this we must be knowing each and every concept related to chemical compound. Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
What is chemical compound?A chemical substance was made up of numerous comparable molecules that are made up of atoms from multiple elements that are held together through chemical bonds. Compounds are classified into four types based on the way the component elements are kept together.
A chemical formula is a method of communicating information about the atom components that make up a specific chemical compound, using conventional acronyms again for chemical elements and subscripts to express the atomic mass involved. The name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
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What is an endothermic reaction?
O A. A reaction that produces heat
O B. A reaction that uses radiation waves
C. A reaction that absorbs heat
O D. A reaction that contains enthalpy
Answer:
C. A reaction that absorbs heat
Explanation:
I do not know Latin, but roughly speaking 'Endo' means inside, and 'thermic' means heat.
There are several types of chemical reactions, two of the important reactions are endothermic and exothermic. An endothermic reaction absorbs heat. The correct option is C.
What is endothermic reaction?The chemical reaction which proceed with the absorption of heat energy is defined as the endothermic reaction. In an endothermic reaction, the system gains heat and hence the enthalpy change ΔH will be positive.
In endothermic reaction, because of the absorption of heat, the enthalpy of the products will be more than that of the reactants. An example of endothermic reaction is shown as:
N₂ (g) + O₂ (g) → 2NO (g) ΔH = 180.5 kJ
So in endothermic reactions, the reactants absorb heat energy from the surroundings to produce the products. These reactions reduce the temperature of the surrounding area and thereby creates a cooling effect.
Thus the correct option is C.
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1. What is the name for AuCl3?
A)Gold chloride
B)Gold (III) chloride
C)Gold (I) chloride
D)Gold chloride (III)
Answer:
Gold(III) chloride
Explanation:
A sample of liquid mercury is heated from 20°C to 40°C. Which measurement of the sample will increase during this process? volume, density, mass
its volume this is the answer because the mercury will turn into gas. gas has more volume because it takes up more space as it spreads.
Answer: It’s Volume
Explanation:
Once an action plan is in place, it should not be changed.
Please select the best answer from the choices provided.
ОТ
OF
Answer:
F = False
Explanation:
An action plan is a plan that an individual or a firm creates, that contains their objectives, aims, strategies , which they require to achieve their specific goals.
An action plan is very detailed, streamlined and straight to the point. It contains a series or a number of steps or tasks that an individual must embark on in other to achieve their end goal.
WHEN AN ACTION PLAN AS BEEN PUT IN PLACE OR SET IN MOTION, IT CAN BE CHANGED OR ALTERED. This is because the aim of a action plan is to achieve the end goal of an individual or a firm. As long as the changes made in the action plan does not hinder the achievement of those goals then the action plan can be changed.
Some of the very common reasons why action plans are changed or modified includes:
a) To make the action plan more flexible.
b) To track and monitor your progress in achieving your end goal. If there is a delay, you can easily track it out on your action plan and modify it.
In other to create an action plan, it is very important that the goals of such that individual or firm is very well defined and clear from the beginning. Action plans must always be monitored, and updated regularly.
Answer:
F, false
Explanation:
i took the quiz on edge
Which of the following is a strong acid?
A. HF (Hydrofluoric acid)
B. NH3 (Ammonia)
C. NaOH (Sodium hydroxide)
D. HCI (Hydrochloric acid)
Answer:
D. HCI (Hydrochloric acid)
Explanation:
correct me if im wrong but im pretty sure thats the answer
What type of bonding around a central atom would result in a trigonal planar
molecule?
Answer: Three groups bound to it with no lone pairs
i think...
Which of these is an example of an engineering solution?
O
A. Studying the diets of people with autoimmune diseases.
B. Creating a biodegradable trash bag.
C. Figuring out how long it takes plastic to degrade in a landfill.
D. Studying new species of insects in the Costa Rican jungles.
ASAP!!!
Answer:
B. Creating a biodegradable trash bag.
Explanation:
Engineering is generally defined as the use of scientific principles to design or build structures such as buildings, bridges and vehicles.
Engineering is the application of science or math to solve our daily life problems. So, creating a biodegradable trash bag is an example of an engineering solution which solve the environmental-related issues.
Hence, the correct option is B.
41. Which pair of compounds could combine to produce an ester?
I. CH3- CH2 - CH2 - CH3
II. CH3- CH2 - CH2-CH2-OH
III. CH3- CH2 - CH2-COOH
IV. CH3- CH2- CH2- COH
a. I and II
b. II and III
c. II and IV
d. III and IV
Answer: b. ii and iii
Explanation:
The ester, Butyl Butanoate is formed when Butanol reacts with Butanoic acid
as seen below;
CH3-CH2-CH2-CH2-OH + CH3-CH2-CH2-COOH ---->
Butanol Butanoic acid
CH3-CH2-CH2-COOCH2-CH2-CH2-CH3 + H2O
Butyl Butanoate Water
Which animal group actually saw a drop in the number of endangered and threatened species between 1995 and 2005?
a Fish
b. Reptiles
c. Birds
d. Mammals
Answer:
Mammals
Explanation:
Does a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together? Write the net ionic equation.
Answer : Yes, a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The given balanced ionic equation will be,
[tex]CaCl_2(aq)+2HgNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+Hg_2Cl_2(s)[/tex]
The ionic equation in separated aqueous solution will be,
[tex]Ca^{2+}(aq)+2Cl^{-}(aq)+2Hg^{+}(aq)+2NO_3^{-}(aq)\rightarrow Hg_2Cl_2(s)+Ca^{2+}(aq)+2NO_3^{-}(aq)[/tex]
In this equation, [tex]Ca^{2+}\text{ and }NO_3^-[/tex] are the spectator ions.
By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Taking into account the definition of net ionic equation, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
The net ionic equation is a chemical equation for a reaction that lists only the species that participate in the reaction.
In other words, an ionic equation is a chemical equation where electrolytes in aqueous solution are written as dissociated ions. Usually this is a salt dissolved in water, where the ionic species are followed by (aq) in the equation, to indicate that they are in aqueous solution.
The balanced equation will be:
CaCl₂(aq) + 2 HgNO₃(aq) → Ca(NO₃)₂(aq) + Hg₂Cl₂(s)
where (aq) means aqueous and (s) solid.
Taking into account that:
All Cl⁻, Br⁻ and I⁻ salts are soluble. All salts of NO₃⁻, C₂H₃O₂⁻, ClO₃⁻ and ClO₄⁻ are soluble.The total ionic equation in separated aqueous solution will be:
Ca²⁺(aq) + 2Cl⁻(aq) + 2 Hg⁺(aq) + 2NO₃⁻(aq) → Ca²⁺ + 2NO₃⁻(aq) + Hg₂Cl₂(s)
A spectator ion is an ion that appears both as a reactant and as a product in an ionic equation.
Spectator ions can be either cations (positively charged ions) or anions (negatively charged ions).
When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.
In this case, Ca²⁺ and NO₃⁻ are the spectator ions because they appear unchanged in both the product and the reagent. So these ions cancel out by writing the net ionic equation and you get:
2Cl⁻(aq) + 2 Hg⁺(aq) → Hg₂Cl₂(s)
Since Hg₂Cl₂ is an insoluble salt, it will precipitate.
Finally, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
Learn more:
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Answer:
emission at a high speed or energy which often forms electrons
What is the percent of nitrogen in dinitrogen pentoxide?
A 74.1
B 62.8
C 44.4
D 25.9
Answer: D.) 25.9%
Explanation:
Dinitrogen pentoxide chemical formular : N2O5
Calculating the molar mass of N2O5
Atomic mass of nitrogen(N) = 14
Atomic mass of oxygen(O) = 16
Therefore molar mass :
N2O5 = (2 × 14) + (5 × 16) = 28 + 80 = 108g/mol
Percentage amount of elements in N205:
NITROGEN (N) :
(Mass of nitrogen / molar mass of N2O5) × 100%
MASS OF NITROGEN = (N2) = 2 × 14 = 28
PERCENT OF NITROGEN : (28/108) × 100%
0.259259 × 100%
= 25.925%
= 25.9%
Which type of reaction involves the release of energy into the surroundings? Options: endothermic reactions
exothermic reactions
Answer:
exothermic reaction
Explanation:
The definition of exothermic is:
describing a process that involves the release of energy into the surroundings by substances undergoing change.
Think of ex-othermic as energy exiting/ released and en-dothermic as energy entering.
Answer: it’s endothermic
Explanation:
Write the formula of the ion formed when Aluminum reacts by losing electrons
Answer:
If alluminium loses 1 electron Al+
If it loses 2 electrons Al++
Explanation:
HELP ASAP! PLEASE PLEASE PLEASE Suppose a reaction begins with 54 molecules of B2 and 126 molecules of A2 which react as completely as possible according to the equation B2 + 3 A2 --> 2 BA3. How many B2 molecules will be present in the container at the end of the reaction?
Answer:
Explanation:
For one B2 molecule 3 A2 molecules are reacting means,
the ratio is 1:3
Out of 126 molecule = 126/3 =42 molecules are required for the reaction,
therefore the 54-42= 10 molcules of B2 will reamin in the end of reaction.
Write the equilibrium expression for the following reaction. Based upon the value of K, would you expect more or less product to be in the equilibrium mixture? Why?
Answer:
1. K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. More products are obtained at equilibrium since the equilibrium constant is very large.
Explanation:
1. Determination of the expression for the equilibrium constant, K.
The equilibrium constant, K for a given reaction is simply the ratio of concentration of the products raised to their coefficient to the concentration of the reactants raised to the coefficient.
The balanced equation for the reaction is given below:
CaO(s) + CH4(g) + 2H2O(g) —> CaCO3(s) + 4H2(g)
Therefore, the equilibrium constant, K for the above equation is:
K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. From the question given, the equilibrium constant is 2344.
Since the equilibrium constant is very large, it therefore means that more product are obtained at equilibrium.
What is chromatography used for? Select all that apply. ]
dissolving substances
separating liquids in a mixture
crystallizing substances
separating gases in a mixture
Answer:
Separating liquids in a mixture
Separating gases in a mixture
Explanation:
Chromatography is the separation of a mixture by passing it in solution or gas through a medium where the components move at different rates.
Answer:
separating liquids in a mixture
separating gases in a mixture
Explanation:
If you want to lift a 30-kg box to a height of 1 m, how much work will it take?
A. 300 J
B. 147 J
C. 294 J
D. 30 J
If we want to lift a 30 kg box to a height of 1 m Ans is 294 J
Explanation:
Ans is 249 J
What is an alloy? A. A substitution of one metal for another metal B. A metal with a changed oxidation state C. A combination of metal with another element D. A layering of one metal over another metal
The correct answer is the combination of a metal with another element.
An alloy is a combination of two or more metallic elements to make a stronger material. For instance, there are bronze alloys, brass alloys, and coin alloys.
We can confirm that an alloy is a combination of one metal with another metal because stainless steel is made of an iron and chromium alloy (iron is a metal; chromium is also a metal). Therefore, we can confirm that option C is the best choice.
Initial temperature of metal =
С
Initial temperature of water =
°C
Final temperature of both =
Answer:
52.0 °C
Explanation:
You have left the carton of milk out of the refrigerator overnight and it has
spoiled. This is an example of a
A. Physical property
O
B. Physical change
OC. Chemical property
D. Chemical change
Reset Selection
Answer:
D: chemical change
Explanation:
Mixtures and Solutions
A solution is made by dissolving
9.68 g of potassium chloride
(KCI) in 565 g of water.
What is the molality of the solution?
[?] m KCI
Molarm
Answer:
[ 0.23 ] m KCl
Explanation:
Take a look at the attachment below,
565 grams = 565.1000
=0.565 kg (H20)
molar mass (Potassium Chloride),
mass of Potassium + Mass of Chloride,
39.0983 + 35.453
=74 5513 g 1 mol
Given - 968 grams (Potassium chloride)
{ (9.68 g KCI) }
(74.5513 g KCI mol)
0.565 kg H2O
( 0.23 mol / kg ) - about ,
solution =0.23 in KCI
[0.23] m KCI
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An oil tanker spills a large amount of oil near the ocean shoreline. Which application of chemistry would best solve this problem?
1. Convert 0.00006125 to scientific notation
Answer:
6.125 × 10^-5
Explanation:
You have to move the decimal place 5 times to the right. Remember in scientific notation the first number, (the number that comes before the 10) has to be between 1.0 and 9.99...
Elastic energy is stored when an object is stretched. Is this an example
of potential or kinetic energy?
A. Neither
B. Both
d
C. Kinetic
O
D. Potential
Reset Selection
Answer:
D: potential
Explanation:
how does temperature affect spontaneity?
a. if triangleH and triangleS have opposite signs, the temperature will determine spontaneity.
b. if the temperature is high enough, any reaction will become spontaneous
c. temperature will affect spontaneity only if triangleH and triangleS are both positive
d. if triangleH and triangleS have the same sign, the temperature will determine spontaneity
PLEASE HELP TYSM!!!
Answer:
The correct option is d.
d) If ΔH and ΔS have the same sign, the temperature will determine the spontaneity
Explanation:
Consider the table attached at the bottom which shows Spontaneity and the sign of Enthalpy and Entropy terms.
We can clearly see from the table how temperature effects the Spontaneity.
If the signs of ΔH and ΔS are opposite, the spontaneity doesn't depend on the temperature.
If the signs of ΔH and ΔS are same, then the temperature effects the Spontaneity. If both have negative signs, reaction is spontaneous at low temperature. If both have positive signs, reaction is spontaneous at high temperature.
Answer:
D.
Explanation:
A pE x
The empirical formula is:
A. the actual number of atoms of each element in a molecule.
B. representation of a compound that shows how its atoms are arranged.
C. All of these
D. the relative number of atoms of each element, using the lowest whole ratio.
Reset Selection
Answer:
option c the relative number of atoms of each element using the lowest ratio because empirical formula gives the simplest-whole number ration of each element
e.g. the empirical formula of benzeneC6H6 in CH
Explanation:
I HOPE IT WILL HELP YOU
What are crystalline solids?
A. Solids with heterogeneous organization
B. Solids with a repeating atomic pattern
O C. Solids with a random atomic structure
D. Solids that break apart in jagged pieces
To solve this we must be knowing each and every concept related to crystalline solids. Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
What is crystalline solids?One form of solid-state material is crystalline solids. Solids are substances with a melting point higher than ambient temperature at atmosphere pressure. Solids are classified into two categories based just on arrangement of their constituents: amorphous solids and crystalline solids.
Crystalline solids are solids with a regular but three-dimensional arrangement of component units including such (atoms, molecules, or ions). Crystalline solids are the solids with a repeating atomic pattern.
Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
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