Answer:
B 64
Explanation:
i think b 64 is right answer.......
The relative atomic mass is 64g and the metal is copper(Cu).
What is relative atomic mass?The weighted average of the masses of an element’s isotopes in comparison to the mass of a carbon-12 atom is known as relative atomic mass (Ar).The ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant is defined as relative atomic mass (Ar) or atomic weight.The mole ratio for M and O in the compound MO is 1:1.
The mass of oxygen in the 16g compound is 16.0 - 12.8 = 3.2g.
The relative atomic mass of O is 16g. The number of moles of O in the 3.2g is 3.2/16 = 0.2.
Since the M and O gave the same number of moles in the MO, that is their mole ratio is 1:1, then the number of moles of the M in the MO is also 0.2.
Therefore, if 0.2 mole if M weighs 12.8g, then 1 mole of M will weigh 1 x 12.8/0.2 = 64g/mole.
The mole of an element is its relative atomic mass.
Therefore, the relative atomic mass of M is 64g.
Hence, option B is the correct answer.
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Red is dominant to white for flower color in a particular plant. If a red flowered plant (RR) is crossed with a white flowered plant (rr), what color will the offspring be?
Answer:
The offspring will all have red-colored flowers
Explanation:
A dominant character is one that is always expressed when it is present.
A recessive character or trait is one that is only expressed in the absence of the dominant character. Thus, when the dominant and recessive character are both present in an organism, the recessive character will be hidden while the dominant character will be expressed.
According to Menedel's laws of inheritance, in the cross between the dominant (RR) red-flowered plant and the recessive (rr) white-flowered plant, the genotype of the offspring will be as follows:
RR x rr = Rr, Rr, Rr,Rr
The offspring are all heterozygous for flower color. However, since red flower color is dominant over white flower color, all the offspring produced will have red-colored flowers.
You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a
sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly,
what is the limiting reactant?
Answer:
peanut butter
Explanation:
because you have 10 pieces of bread, 4 tbs of peanut butter, and 20 tbs of jelly, meaning you can make 5 sandwwitches with the bread, 4 sandwitches with the peanut butter, and 10 sandwitches with the jelly. so you dont have enough peanut butter to make all the sandwitches
According to the given scenario, If one have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, the limiting reactant will be peanut butter.
What is a limiting reactant?
The reactant that gets consumed first in a chemical reaction and result in limiting the formation of product is referred to as a limiting reactant.
According to the given scenario, the quantity of peanut butter will get consumed first so it will act as a limiting reactant.
Thus, If one have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, the limiting reactant will be peanut butter.
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(e) Another student investigated the rate of a different reaction
Table 3 shows the results from the different reaction
Headings that you a
will appear here.
Table 3
Mass lost when the reaction was
complete
9.85 g
Time taken to complete the reaction
2 minutes 30
seconds
Calculate the mean rate of the reaction using Table 3 and the equation:
mass lost in g
mean rate of reaction time taken in s
Give your answer to two decimal places.
Answer:
0.07 g/s.
Explanation:
From the question given above, the following data were obtained:
Mass lost = 9.85 g
Time taken = 2 min 30 s
Mean rate =?
Next, we shall convert 2 min 30 s to seconds (s). This can be obtained as follow:
1 min = 60 s
Thus,
2 min = 2 × 60 = 120 s
Therefore,
2 min 30 s = 120 s + 30 s = 150 s
Finally, we shall determine the mean rate of the reaction. This can be obtained as illustrated below:
Mass lost = 9.85 g
Time taken = 150 s
Mean rate =?
Mean rate = mass lost / time taken
Mean rate = 9.85 / 150
Mean rate = 0.07 g/s
Therefore, the mean rate of the reaction is 0.07 g/s
What is the molarity of NaOH if 300.mL of
5.00M HCl is titrated with 200.mL of NaOH?
How many L of a 7.5 H2SO4 stock solution would you need to prepare a dilute solution 100 L of 0.25M H2SO4
Answer:
3.33 L
Explanation:
We can solve this problem by using the equation:
C₁V₁=C₂V₂Where the subscript 1 refers to one solution and subscript 2 to the another solution, meaning that in this case:
C₁ = 0.25 MV₁ = 100 LC₂ = 7.5 MV₂ = ?We input the data:
0.25 M * 100 L = 7.5 M * V₂V₂ = 3.33 LThus the answer is 3.33 liters.
The diagram shows the different models of the atom that eventually led to the modern atomic theory.
Which model was proposed as a result of Rutherford's scattering experiment where positive particles did not pass straight through a foil as expected? (5 points)
Model A
Model B
Model C
Model D
Answer:
B.
Explanation:
The atomic model represents the position of the sub-atomic particles. Model A was proposed after Rutherford's scattering experiment where the positive particles were deflected in the middle. Thus, option A is correct.
What was Rutherford's atomic model?Rutherford's atomic model proposed the presence of the positive nucleus in the middle of the atom while the electrons surrounded them in their orbitals with a negative charge.
He performed the scattering experiment where alpha particles emitted by the radioactive element were used to locate the positions of the electrons, neutrons, and protons.
According to the experiment, model A, best fits as the nucleus made of protons and neutrons takes the center of the atom with negative electrons surrounding them. The nucleus is small as compared to the entire atom.
Therefore, option A. model A best proposes Rutherford's model.
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which substance is reduced ?
Cl^2 +2KBr= 2KCl + Br2
Answer:
Initially Br is in -1 oxidation state and Cl in 0 oxidation state. Finally Cl is in -1 o.s. and Br in 0.
This means that Br has oxidised from -1 to 0 and Cl is reduced from 0 to -1.
KBr is reducting agent as it helps Cl to reduce.
Cl2 is oxidising agent as it helps Br to oxidise.
Explanation:
Water forms according to the equation below: 2H2(g) + O2(g) 2H2O(g) Hrxn = -483.64 kJ How much energy is released during the formation of 1 mol H2O(g)?
Answer:
Hrxn = -241.82 kJ
Explanation:
2H2(g) + O2(g) --> 2H2O(g) Hrxn = -483.64 kJ ............. (i)
The equation for formation of 1 mol of H2O is given as;
H2(g) + 1/2O2(g) --> H2O(g) ................. (ii)
Eqn (ii) is obtained by dividing eqn (i) by 2
That means the heat of reaction for eqn (ii) is given as;
Hrxn = -483.64 kJ / 2
Hrxn = -241.82 kJ
Answer:-241.82 kJ
Explanation:
your welcome kaylee and have a great day ;)
How do you write 0.00001 in scientific notation?
Answer:
1×10^-5
hope it helps you
Answer:
According to the text
"Move the decimal 5 times to right in the number so that the resulting number, m = 1, is greater than or equal to 1 but less than 10.
Since we moved the decimal to the right the exponent n is negative. n = -5.
Write in the scientific notation form, m × 10n = 1 × 10-5""
Explanation:
2. How much heat is needed to convert 2.7 moles of ethanol at its boiling
point from liquid to vapor?
Answer:
así que busca, pero la respuesta está en por cierto Explanation:
The quantity of heat needed to convert 2.7 moles of ethanol at its boiling point from liquid to vapor is 104.49 kJ
From the question,
We are to calculate the heat needed to convert 2.7 moles of ethanol from liquid to vapor.
Using the formula
Q = n × ΔHvap
Where Q is the quantity of heat
n is the number of moles
and ΔHvap is the enthalpy of vaporization
From the given information,
n = 2.7 moles
and
ΔHvap of ethanol = 38.7 kJ/mol
Putting the parameters into the formula, we get
Q = 2.7 × 38.7
Q = 104.49 kJ
Hence, the quantity of heat needed to convert 2.7 moles of ethanol at its boiling point from liquid to vapor is 104.49 kJ
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how many moles of MgO can be made from 10 moles of fe2O3?
Answer:
Fe 2 O3 .
Explanation:
what is the formula for the compound formed by Ba2+ and Mn04 ?
Answer:
Barium permanganate | Ba(MnO4)2 - PubChem.
Description: Barium permanganate appears as ...
Synonyms: BARIUM PERMANGANATE7787-3...
Molecular Formula: Ba(MnO4)2 or BaMn2O8
Molecular Weight: 375.2 g/mol
Explanation:
How is a compound different from a mixture?
A. Mixtures are created through physical changes; compounds are created through chemical reactions.
B. Compounds are created through physical changes; mixtures are created through chemical reactions.
C. Mixtures, on average, are heavier than compounds.
D. Compounds, on average, are heavier than mixtures.
Difference girteen tungsten and nichrome
Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.
Explanation:i hope u have a wonderful night and stay safe
Between which two stages does cell division (cells divide or multiple) first occur?
Captionless Image
a. A and B
b. B and C
c. C and D
d. D and E
Clear selection
Answer: C and D
Explanation:
Arrange the following formulas in increasing percentage of nitrogen. Show a NEAT solution.
a) NH4NO3
b) CO(NH2)2
c) NH3
Answer:
c) NH3Explanation:
I HOPE IT HELPS :) VERY MUCH
What are chemical formulaes?
give your own response!!
Answer:
is a way of presenting information about the chemical proportions of atoms
Explanation:
What would be the effect on this reaction of increasing the temperature?
2H + O —> 2H O + energy
2 2 2
Answer:
IT IS NOT C I GOT IT WRONG THE CORRECT ANSWER IS A
The rate of the forward reaction would decrease
Explanation:
A.pex
Please! I need this quick! THANK YOU!!
Answer:
Force
Explanation:
The force is applied to either pushing or pulling forwarding momentum and movement.
Answer:
A: Force
It is a push/pull that changes the motion of an object
which basic postulates of Dalton's atomic theory are modified by the modern atomic theory
Answer:
Dalton's atomic theory has been modified as
Explanation:
Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes
Answer:
On the basis of new experimental facts, Dalton's atomic theory has been modified as: ... Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes.
Explanation:
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Which of the following factors is the most in-
fluential in the formation of soil?
(HELP ASAP) what is the reaction for Si + S₈ --> Si₂S₄
Answer:
Synthesis reaction~~~~~~~
Explanation:
Two or more substances combined but not chemically, are called what?
Answer:
a mixture
Explanation:
Two or more substances combined chemically, are called a compound
A volume of 20.0L of oxygen is warmed from -30.0C to SATP condition. What is the new volume if the pressure is kept constant
Argon atom can exist freely in nature, why
Answer:
Argon can exist freely in nature because it has a full octet of electrons the way its found in the nature is the same way its found in periodic table of element in vast amouts of stabilization.
HELP PLEASE || TEN PTS WILL MARK BRAINLEST ||Reaction B could produce a substance with a pH of...
Group of answer choices
4.
14.
10.
7.
Answer:
the answer is 4
Explanation:
i took the test and got it right and i would recommend using quizlet it has these flash cards and the answers are there you just click on the one that says your question and it will say your answer on the back. It helps with most of my test! Hope this helps (:
Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product?
Answer:
CO2
Explanation:
CO2 or carbon dioxide is produced when iron is extracted from its ore. Carbon monoxide Co is used as reducing agent in iron extraction. In this reaction iron ore is reduced to iron and CO is oxidized to CO2 or carbon dioxide which is released in the process. There extraction of iron is redox reaction.
I need help someone plz
Answer:It has 8grams of hydrgen
Explanation:
Need quick! Please help rn! THANK YOU!
Answer:
B. Unbalanced force
Explanation:
Answer:
I think its unbalanced force
Explanation:
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How many atoms are in 5.31 mol of Iron?
Answer:
3.77 moles of Fe contain 2.27 × 10, 24 as an exponent