Answers
Answer:
a.option is the correct answer
Related Questions
match the vocabulary with the definitions.
1. a single compound breaks apart from two or more elements or compounds
2. two or more elements or compounds combine to form one compound.
3. a substance formed as a result of a chemical reaction.
4. one of the starting substances involved in a chemical reaction.
combination reaction
reactant
decomposition reaction
product
Answers
1: Decomposition reaction
2: Combination reaction
3: product
4: Reactant
A compound has the empirical formula CH. A sample of this
compound containing 0.387 moles has a mass of 30.19 g. What is the
molecular formula?
Select one:
O
a. C6H6
b. C2H2
0
c. C3H3
O
d. C4H4
Answers
Since we have the mass and number of Moles we can calculate the molecular weight.
n = m/M so M = m/n = 30.19/ 0.387 = 78 g/mol
For C6H6 the molecular weight is :
6 x 12 + 6 x 1= 72 + 6 = 78 g/mol
Which corresponds
Draw the mechanism for the first step in the reaction of resorcinol with ethyl acetoacetate including all proper electron pushing arrows. Use the back of this page for space as needed.
Answers
Answer:
Attached below is the required diagram .
Explanation:
During the reaction of resorcinol and ethyl acetoacetate there is the production of a transesterification product, and this transesterification product is produced in other to increase the electrophicilty of the carbonyl center.
Attached below is the required diagram .
Why is the sky blue? The earth is surrounded by an atmosphere. ...
How much does the earth weigh? ...
How far away is the sun? ...
What is a black hole? ...
How do airplanes fly? ...
How do flies walk on the ceiling? ...
How are rainbows made? ...
Are sharks mammals?
Answers
•The sun is 94.079 million miles away
•A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
•Airplanes fly because they are able to generate a force called Lift which normally moves the airplane upward. Lift is generated by the forward motion of the airplane through the air. This motion is produced by the Thrust of the engine.
•Flies need sticky feet to walk on ceilings, but not so sticky that they get stuck upside down. So each foot comes with a pair of claws that help hoist the gooey foot off the wall. Flies use several different techniques to get unstuck: pushing, twisting, and peeling its footpads free
•rainbows are made by the refraction of light particles
•sharks are not mammals since they are cold blooded
What type of physical weathering is caused by the expansion of water?
Answers
Answer:
Its frost wedging
Explanation:
What is the empirical formula of a compound containing 12 g of carbon, 2 g of hydrogen, and 16 g of oxygen only
Answers
Answer:
The empirical formula=CHO. To explain it is C1H1O1 but we don't put the one that's why it is CHO
Explanation:
several/two grologic processes change the surface of earth quickly/gradually/over various time pirods
Answers
Answer:
sever and over
The more bonds an atom can make, the more likely it is to combine with other atoms in different ways.
Which element is most likely able to make the greatest variety of bonds?
O nitrogen
O hydrogen
O oxygen
O carbon
Answers
Answer:
carbon
Explanation:
for it has got an ideal size, neither too small nor too big
The smallest unit which contains all the chemical properties of the substance containing two or more atoms is ? .
Answers
Answer:
element has this explanation and is actually the smallest unit with chemical properties
a cube is 5.00 cm on each side and has a mass of 600.0 g. what is its density?
Answers
Answer:
7,491 lb/cu ft.
Explanation:
Automobile air bags inflate following a serious
impact. The impact triggers the following chemical
reaction:
2NaN3(s) + 2Na(s) + 3N2(g)
If an automobile airbag has a volume of 11.6 L, what mass of NaN3 (in g) is required to fully inflate the airbag upon impact? Assume STP conditions.
Express your answer in grams to three significant figures.
Answers
Answer:
b
Explanation:
Mixed Practice:
For questions 6-9, you may not have to use your entire flow chart. Decide where to start and end using your flow chart.
4NH3 + 5O2 → 4NO + 6H2O
MM NH3 = 17.04 g/mol; MM O2 = 32 g/mol; MM NO = 30.01 g/mol; MM H2O = 18.02 g/mol
In the above reaction, how many moles of NO are formed if 824 g of NH3 react?
27.5 mol
3510 mol
48.4 mol
774 mol
Answers
Given
Mass of NO - 824 g
Molar mass of NO - 30.01g/mol
No of moles of NO = Given mass/Molar mass
No of moles of NO = 824/30.01= 27.45 mole
Hence 27.5 moles of NO are formed!
From a cross between a short-haired guinea pig (hh) and a long-haired guinea pig (Hh), what would be the possible phenotypes of the offspring?
A. 100% will have long hair.
OB. 75% will have long hair; 25% will have short hair.
OC. 50% will have long hair; 50% will have short hair.
O D. 25% will have long hair; 75% will have short hair.
Answers
Answer:
C
Explanation:
There will be a two long hair and two short hair
A mixture contains 21.7 g NaCl,
3.74 g KCI, and 9.76 g Lici.
How many total moles are in this
mixture?
Molar Mass
NaCl: 58.44 g/mol
KCI: 74.55 g/mol
LiCl: 42.39 g/mol
Answers
Answer:
[tex]n_{tot}=0.652mol[/tex]
Explanation:
Hello there!
In this case, according to the given problem, it is possible to use the given molar masses of NaCl, KCl and LiCl in order to calculate the total moles, yet we calculate the moles of each salt first as shown below:
[tex]n_{NaCl}=21.7gNaCl*\frac{1molNaCl}{58.44gNaCl}=0.371molNaCl\\\\ n_{KCl}=3.74gKCl*\frac{1molKCl}{74.55KCl}=0.0502molNaCl\\\\ n_{LiCl}=9.76gLiCl*\frac{1molLiCl}{42.39gLiCl}=0.230molLiCl[/tex]
Then, we add them all together to obtain:
[tex]n_{tot}=0.371mol+0.0502mol+0.230mol\\\\n_{tot}=0.652mol[/tex]
Regards!
TRUE or FALSE: recessive alleles of the same gene are named with a
DIFFERENT letter than dominant alleles.
Answers
Which structure is the naturally occurring form of glucose?
six-sided ring
multiple ring
five-sided ring
linear chain
Answers
Answer: A. Six-Sided Ring
A sample of liquid water at 30 c is heated until half of it boils away
Answers
Answer:
b. decreases
Explanation:
What is true of a solution of 1.0 M HCl(aq)?
It contains 1.0 gram of HCl per 100 grams of water.
It contains 1.0 gram of HCl per 1 liter of solution.
It contains 1.0 mole of HCl per 100 milliliters of water.
It contains 1.0 mole of HCl per 1 liter of solution.
Answers
Explanation:
M or molarity means moles of solute/liters of solution
It is true that a solution of 1.0 M HCl contains 1.0 mole of HCl per 1 liter of solution.
What is molarity?Molarity refers to the measure of the concentration of a chemical species.
It is measured in particular of a solute in a solution i.e. in terms of amount of substance per unit volume of solution.
If a solution is 1.0M HCl, this means that there are 1.0 mole of HCl per 1 liter of solution.
Learn more about molarity at: https://brainly.com/question/17578846
What happens to light as it passes through a convex lens?
A.The light rays bend inward
B. The light scattered
C.The light magnified
D.The light bend outward
Answers
Answer:
the answer is D
Explanation:
Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.
In terms of electrons, What do the arrows mean?
Answers
How many formula units (particles of AgNO3) are in 5.50 grams of AgNO3?
(picture for answer choices)
Answers
Answer:
No of molcules(N)= 1.98×10^22
Explanation:
m=5.5, Mm= 167, NA= 6.02×10^23
Moles(n)= m/M= N/NA
5.5/167 = N/6.02×10^23
SIMPLIFY
N=1.98×10^22molecules
A sample of argon gas has a volume of 698.7l. The temp is decreased to 24.8c and the volume also decreases to 499.1l. What was the original temp
Answers
How many grams would be in 4.45 x 10^23 molecules of N203
Answers
Answer:
56.24g
Explanation:
To find the mass of N2O3 in 4.45 x 10^23 molecules, it must first be converted to moles by dividing the number of molecules in N2O3 by Avagadro's number (6.02 × 10^23).
number of moles in N2O3 = 4.45 x 10^23 ÷ 6.02 × 10^23
n = 4.45/6.02 × 10^(23 - 23)
n = 0.74 × 10^0
n = 0.74moles.
Using the formula below to find the mass of N2O3;
mole = mass ÷ molar mass
Molar mass of N2O3 = 14(2) + 16(3)
= 28 + 48
= 76g/mol
mass = mole × molar mass
Mass = 0.74 × 76
Mass = 56.24g
Water can break down to form hydrogen and oxygen gas. Balance the
equation below (hint, always balance oxygen last). What coefficients go in
the blank spaces? *
Answers
Answer:
its 2,2,1
Explanation:
How many moles of a gas sample are in a 5.0 L container at 205 K and 340 kPa?
(The gas constant is
L kPa
8.31
mol K
)
Round your answer to one decimal place and enter the number only with no units.
Your Answer:
Answer
Answers
Answer:
1.0 mole
Explanation:
From the question given above, the following data were obtained:
Volume (V) = 5 L
Temperature (T) = 205 K
Pressure (P) = 340 KPa
Gas constant (R) = 8.31 KPa.L/Kmol
Number of mole (n) =?
Using the ideal gas equation, the number of mole of the gas in the container can be obtained as follow:
PV = nRT
340 × 5 = n × 8.31 × 205
1700 = n × 1703.55
Divide both side by 1703.55
n = 1700 / 1703.55
n = 1.0 mole
Thus, the number of mole of the gas in the container is 1.0 mole
For the decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °C , the average rate of disappearance of N2O5 over the time period from t = 0 min to t = 112 min is found to be 5.80×10^-4 M min^-1. The average rate of formation of O2 over the same time period is:__________ M min-1
Answers
Answer:
1.45 × 10⁻³ M min⁻¹
Explanation:
Step 1: Write the balanced reaction for the decomposition of dinitrogen pentoxide
2 N₂O₅(g) ⇒ 2 N₂(g) + 5 O₂(g)
Step 2: Calculate the average rate of formation of oxygen
The average rate of disappearance of N₂O₅ over the time period from t = 0 min to t = 112 min is found to be 5.80 × 10⁻⁴ M min⁻¹ (5.80 × 10⁻⁴ molN₂O₅ L⁻¹ min⁻¹). Given that the molar ratio of N₂O₅ to O₂ is 2:5, the average rate of formation of O₂ is:
5.80 × 10⁻⁴ molN₂O₅ L⁻¹ min⁻¹ × 5 molO₂/ 2 molN₂O₅ = 1.45 × 10⁻³ molO₂ L⁻¹ min⁻¹ = 1.45 × 10⁻³ M min⁻¹
What is the molarity of a solution that contains 33.5 g of CaCl, in 600.0 mL of water.
0.503 M
O 0.0558 M
5.00 x 10-4 M
0.744 M
Answers
Balanced equation: K2S(aq) + BaCl2(aq) =
Answers
Answer:
K2S(aq) + BaCl2(aq) = 2KCl(aq) + BaS(s)
In the image attached, it is explained how the solution is balanced.
The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. The balanced equation is
K[tex]_2[/tex]S(aq) + BaCl[tex]_2[/tex](aq)[tex]\rightarrow[/tex]2KCl(aq) + BaS(s)
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side.
The unbalanced equation is
K[tex]_2[/tex]S(aq) + BaCl[tex]_2[/tex](aq) [tex]\rightarrow[/tex]KCl(aq) + BaS(s)
The number of atoms of K on reactant side is 2 while on product side it is 1, so to balance K we need to multiply KCl by 2
K[tex]_2[/tex]S(aq) + BaCl[tex]_2[/tex](aq) [tex]\rightarrow[/tex]2KCl(aq) + BaS(s)
The atoms of sulfur on reactant and product side is 1, so it is balanced.
The atoms of Ba on reactant and product side is 1, so it is balanced.
The atoms of Cl on reactant and product side is 2, so it is balanced.
Therefore the balanced equation is
K[tex]_2[/tex]S(aq) + BaCl[tex]_2[/tex](aq)[tex]\rightarrow[/tex]2KCl(aq) + BaS(s)
Learn more about the balanced equation, here:
https://brainly.com/question/7181548
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James measured the humidity of the air on his backyard each morning for four days His data is recorded below On which day did it most likely rain
Answers
Answer:
hdbdjsjsj
Explanation:
hdhshshe
What is the name for a compound that forms between one Nitrogen and 3 Chlorines
Answers
in the picture below