Answer:
A
Explanation:
describe the purpose of using a chemical equation.
Answer:
The purpose of using a chemical equation is to keep track of elements and the number of atoms of each of the elements on each side of the equation. ... They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out.
Answer:
:0
Explanation:
Sample Response: Chemical equations show how chemicals interact when a reaction occurs. They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out. They also help keep track of all elements and the number of atoms of each element on each side of the equation.
pls help ill mark as brainliest :)
Q9. NH4OH + HBr H2O + NH4Br
is this combustion, synthesis, single reaction, double reaction, decomposition ?
Answer:
I think its a double reaction
Explanation:
“Jesus came to serve. How is He calling me to serve?”
Answer:
...
Explanation:
How is compound XY different from elements X and Y?
Answer:
Compound XY contains the different atoms of X and Y while elements X and Y both contains the same atoms of X and Y respectively.
Find the explanation below.
Explanation:
An element is a substance that is composed of atoms of the same kind. For example, element X contains only atoms of X while element Y contains only atoms of Y. On the other hand, a compound is a substance made from the chemical combination of two or more elements, hence, a compound combines different atoms. This is the case of Compound XY as it contains different atoms of different elements.
Therefore, Compound XY is different from elements X and Y in the sense that Compound XY contains two different atoms from different elements (X and Y) while both elements X and Y are individually made up of only one type of atom each i.e. element X contain X atoms only and element Y contain Y atoms only.
An acid-base reaction of (r)-sec-butylamine with a racemic mixture of 2-phenylpropanoic acid forms two products having different melting points and somewhat different solubilities. Draw the structure of these two products. How are the two products related? Be sure to answer all parts.
Answer:
See explanation
Explanation:
When an optically active compound reacts with a racemic mixture, two different products appear .
Hence, when (R)-sec-butylamine reacts with a racemic mixture of 2-phenylpropanoic acid as shown in the image attached.
Enantiomers are optical isomers which are mirror images of each other. The image attached was obtained from Bartleby.
Kayla’s teacher gave each lab group three liquids and asked them to test their pH. Kayla tested each one and recorded her results in the chart below.
She then combined the liquids and tested again. She combined liquid C and D and the resulting pH was 7.
Which statement BEST describes the process that took place when liquid C and D were combined?
F) D. The solution would be slightly acidic.
G) C. The acid and base would neutralize to form a salt.
H) A. The acid and base would neutralize to form an element.
I) B. The solution would be slightly basic.
Answer:
A. The acid and base would neutralize to form an element.
Answer:
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Which trait is inherited? (1 point)
physical fitness
scars
hair length
freckles
Answer:
freckles.........
You can inherit freckles from your family but you cant inherit hair length, physical fitness, or scars due to the fact you can cut your hair any length.You can gain scars from any wound. whereas Physical fitness comes from how healthy you are to perform aspects of sports, occupations and daily activities.
Answer:
Freckles
Explanation:
Because everything else is specific to a person. And these things are ones own personality and not born with.
Were you able to identify each expression?
Answer:
Yes.
Explanation:
The expression are easy and clear to understand when a person expresses his inner state. The expression are a natural reaction which a person demonstrates and mostly these expressions are instant and unintended.
Is the flame test a test for the cation (metal listed first) or the anion (nonmetal listed second)?
Answer:
the answer is metal hope it helps
Explanation:
Determine how you would prepare 220 mL of a 0.500 M potassium hydroxide solution starting with: a) solid potassium hydroxide b) a 1.25 M potassium hydroxide solution
Answer:
a) 6.17 g of solid KOH
b) 88.0 mL of a 1.25 M potassium hydroxide solution
Explanation:
a) We have to determine the mass of solid potassium hydroxide that has to be weighed to prepare 220 mL of a 0.500 M potassium hydroxide solution. We will also require the molar mass of potassium hydroxide, KOH, 56.11 g/mol.
0.220 L × (0.500 mol/L) × (56.11 g/mol) = 6.17 g
b) We will use the dilution rule to determine the volume of the 1.25 M potassium hydroxide solution to be measured.
C₁ × V₁ = C₂ × V₂
V₁ = C₂ × V₂ / C₁
V₁ = 0.500 M × 220 mL / 1.25 M = 88.0 mL
Line M passes through the points (-5, 9) and (-1,9).
12
10-
8
6
2
-12-10-8-6-4-22
2
6 8 10 12 X
6
-10
-12-
Which is true of line M?
Answer:
line m is vertical line with an undefined slopel line correct answer is 6 8 10 12 x
The reaction in which methane is burned, CH4 +202 --> 2H20 + CO2, is an example of a
combustion reaction
O synthesis reaction
O decomposition reaction
O precipitate reaction
Answer: Combustion
Explanation:
Methane gas or natural gas is the hydrocarbon that reacts with oxygen as shown below: CH4 + 2O2 → CO2 + 2H2O There are two types of combustion reactions: complete and incomplete combustion. Therefore there are four products, carbon dioxide, water, carbon, and carbon monoxide.
Which statement is NOT true about energy?
A. Energy can be classified as Potential and Kinetic
B.Energy is the ability to do work
C. Ideas and thought are examples of energy
D.Energy can be stored
Answer:
a
Explanation:
Answer:
A
Explanation:
Which stament describes the atoms of an element?
Answer:
A smallest particle of an element that can take part in a chemical reaction is called an atom.
Explanation:
Which of the following is the least likely to remain homogeneous?
. O A. All of these
O B. A supersaturated solution
O C. An unsaturated solution
O D. A saturated solution
Answer:
all
of them
Explanation:
What is the chemical equation of Dr. Jeff’s demonstration using a battery to light steel wool on fire. What is the chemical equation? Please explain! Will give brainliest if correct and explained well ;D
E=x +c - D Emonety to explain the functionally full process of work and C3
Answer: The Equation:
Iron + oxygen → iron oxide
2Fe(s) + 3/2 O2(g) → Fe2O3(s)
Explanation:
Write the chemical formula for the following: potassium fluoride
Answer:
KF
Explanation:
Potassium = K
Fluoride = F
[tex]K^{+1}F^{-1}K_{1} F_{1}=KF[/tex]
Answer:
KF is your answer. Can I get Brainliest
What are the two main reasons why most metals are more dense than most plastic and wood?
Answer:
Most common metals like aluminum, copper, and iron are denser than wood. The atoms that makeup metals are generally heavier than the atoms in plastic and wood and they are packed closer together.
what is the density of a material with a mass of 12 grams and a volume of 3 mL?
Answer:
The answer is 4 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
So we have
[tex]density = \frac{12}{3} \\ [/tex]
We have the final answer as
4 g/mLHope this helps you
The complex K4[Zn(CN)4(O2)2] is oxidised into Kz[Zn(CN)4(O2)2], then which of the following is correct ?
(A) Zn(II) is oxidised into Zn(IV)
(B) Paramagnetic moment decreases
(C) O-O bond length increases
(D) Paramagnetic moment increases
Answer:
D
Explanation:
THE ANSWER ID DEFINITLY D
Conservation of Mass in Chemical Reactions: 7th grade Science
Question: In a chemical reaction, the total mass of the reactants is 10.0 grams. After the reaction, the total mass of the products must be
A. More than 10.0 grams
B. Exactly 20.0 grams
C. Exactly 10.0 grams
D. Less than 10.0 grams
Answer:
After the reaction, the total mass of the products must be D. Less than 10.0 grams
what is ohm's law? in simple terms please. I dont know but This is what I said, formulas to determine the voltage, resistance or the current. Is this right?
Answer: Your answer was pretty close, but we could make it better! Simply put, ohm's law states that by doubling the voltage across a circuit, the current will also double. You could also say that it was a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit, or (E = IR). Hope this helps!
Explanation:
What advances in technology helped usher in the scientific revolution? Choose the best answer.
1.The landing on the Moon by Apollo brought about the scientific revolution.
2.Discoveries by scholars in the Catholic Church revolutionized scientific knowledge.
3.The discoveries by ancient Greek, Muslim and Chinese scientists.
4.The discovery of optics gave scientists instruments such as microscopes and telescopes.
Answer:
The discovery of optics gave scientists instruments such as microscopes and telescopes.
Explanation:
The period between the 16th-8th century was called the period of the scientific revolution. At this time, the foundations of our modern science was laid.
One of the characteristic of this period was the emphasis on the scientific method which upheld results from reproducible experiments.
Nicolaus Copernicus, Francis Bacon and Isaac Newton were leading names in this period.
It was within this period that the discovery of optics gave scientists instruments such as microscopes and telescopes and scientific examination of the celestial bodies was launched.
Elena held a rock weighing 1 N in her hand. The rock has no velocity.
KE________?
KE = 0
Further explanationEnergy is the ability to do work
Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:
[tex]\large{\boxed{\bold{KE=\frac{1}{2}mv^2}}}[/tex]
So for two objects that have the same speed, the greater the mass of the object, the greater the kinetic energy
The stone in hand is in a motionless state (at rest) so that its velocity (v) = 0, so it has no kinetic energy
But this stone can have potential energy that is gained due to its height
How many carbon atoms are there for every 2 oxygen atoms in CO2? A. 1 B. 2 C. 3 D. 4
Answer:
I think it's 1, but if that's wrong I'm really sorry
Which statement accurately describes an object's weight and mass?
A. Its mass changes with gravitational force, but its weight does not.
B. Both its weight and its mass are the same everywhere in the
universe.
O
C. Its weight is the same everywhere in the universe, but its mass is
not.
O D. Its weight changes with gravitational force, but its mass does not.
Answer:
i believe its A
so sorry if i got it wrong
Explanation:
Is NaBr+I2 -> NaI+Br2 a single replacement
Is not a single replacement
Further explanationA single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Reactions
A+BC--> AC+B
Metal halogens can force metal halide ions in the order F> Cl> Br> I
Oxidation : F₂> Cl₂> Br₂> I₂
Reaction
NaBr+I₂ -> NaI+Br₂
Then the reaction will not occur because I₂ cannot oxidize Br, or the reaction is said to be non-spontaneous
What is a property of all bases
Answer:
The property of all bases are or might be conversation
Explanation:
On edg
9. What is the density of brass, a copper-zinc alloy, if a block displacing 40.8 cm3 weighs 324 grams?
Answer:
The answer is 7.94 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 324 g
volume = 40.8 cm³
We have
[tex]density = \frac{324}{40.8} \\ = 7.941176...[/tex]
We have the final answer as
7.94 g/cm³Hope this helps you
You just got a free ticket for a boat ride, and you can bring along
2 friends! Unfortunately, you have 5 friends who want to come along.
Answer:
10
Explanation:
Khan Academy
