Answer:
See explanation
Explanation:
We know that surface area is an important determinant factor in the study of reaction rate. This is the reason why finely divided marble chips react faster than lumps of marble in the reaction between marble chips and dilute HCl.
Now imagine that i have a lump of marble and i have finely divided marble. Then i also have a solution of 0.5 M dilute HCl. If i introduce 1g of the lump of marble into 250 ml solution of the 0.5 M HCl in one beaker and introduce 1g of finely divided marble into another 250 ml solution of 0.5 M HCl in a separate beaker, we will notice that the finely divided marble chips reacts faster as evidenced by the quicker effervescence of CO2 gas from the later compared to the former.
Hence, smaller marble chips reacts faster with dilute HCl than a lump of marble.
Answer:
yes the above given answer is absolutely correct I agree with u man on the above.
please helppp!!
How do ion charges differ
for the fourth main group
column and the transition
metals?
Answer:
How do ion charges differ for the fourth main group column and the transition metals? Do not have common charges. Transition metals tend to form positive ions, but the number of electrons that are lost varies. Describe how atoms with a large difference in electronegativity form ionic bonds.
Explanation: ?
Rust forms when the iron is exposed to water and oxygen.
True
False
Answer: true
Explanation:
Coffee is an example of a
Answer:
I think it is mixture and of chemical reaction
A vernier calipers are more precise than metre rule
True
False
Answer:
true
Explanation:
Vernier caliper can give exact measurements in mm.
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4. List if each of the following data is qualitative or quantitative:
a. ________________ Green
b. ________________ 5.7 grams
c. ________________ Large
d. ________________ 120 lbs
Explanation:
a. qualitative
b. quantitative
c. quantitative
d. quantitative
Hope this helps you.
Can someone help me determine the name of the formula
Are most snakes venomous or nonvenomous?
Answer:
nonvenomous
Explanation:
Answer:
Around a quarter of all snake species are identified as being venomous. Most are harmless, but others have potent venom and at least five species, including the boomslang (Dispholidus typus), have caused human fatalities.
Explanation:this what go ogle has to say
The recommended dally allowance (RDA) of selenium in your diet is 55 micrograms. how many atoms of selenium is this?
Answer: 4.19 x 10^17 atoms Se
Answer:
4.2 × 10¹⁷ atoms of Se
Explanation:
Step 1: Convert the mass to grams
We will use the conversion factor 1 g = 10⁶ μg.
55 μg × 1 g/10⁶ μg = 5.5 × 10⁻⁵ g
Step 2: Calculate the moles corresponding to 5.5 × 10⁻⁵ g of Se
The molar mass of Se is 78.96 g/mol.
5.5 × 10⁻⁵ g × 1 mol/78.96 g = 7.0 × 10⁻⁷ mol
Step 3: Calculate the atoms in 7.0 × 10⁻⁷ moles of Se
We will use Avogadro's number: there are 6.02 × 10²³ atoms of Se in 1 mole of Se.
7.0 × 10⁻⁷ mol × 6.02 × 10²³ atom/1 mol = 4.2 × 10¹⁷ atom
A 13.9 - g piece of metal ( specific heat capacity is 0.449 /g^ C)who whose temperature is 54.2 degrees * C was added to a sample of water at 13.4 degrees * C in a constant - pressure calorimeter of negligible heat capacity . If the final temperature of the water is 15.6 °C, calculate the mass of the water in the calorimeter .
Answer:
26.2g = Mass of water in the calorimeter
Explanation:
The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:
Q = m*C*ΔT
Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature
Replacing we can write:
[tex]m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}[/tex]
13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)
240.9J = m(H₂O) * 9.2J/g
26.2g = Mass of water in the calorimeterPhysical and chemical properties are used to describe and identify matter. Physical properties can be observed without changing the identity of the substance. Chemical properties can be observed by attempting to change the identity of a substance. What are two physical and chemical properties that you can use to help you identify a substance?
Extensive properties, such as mass and volume, depend on the amount of matter that is being measured. ... Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity
Can you guys help me I have missing assignments and I need help.
Consider four elements from Group 17: fluorine in the second period, chlorine in the third period, bromine in the fourth period, and iodine in the fifth period. Which element has the largest first ionization energy? A. fluorine B. chlorine C. bromine D. iodine E. You need more data to predict the first ionization energy of these elements.
Answer:
A. Fluorine
Explanation:
I got it right on Plato.
Nonliving and living things are made of matter.which of the following statements is true about matter
Answer:
list the statements so i can help
Explanation:
Answer :Nonliving and living things can be made up of combined elements
Explanation:
The statement that "Newton knew what gravity did but he could not explain why gravity did it is the basic difference between?
A. A scientific law and a scientific theory
B. A scientific theory and a societal law
C. A scientific law and societal law
D. A hypothesis and scientific law
B. A scientific theory and a societal law
Newton's law states that:
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.Newton could not explain:
Newton could describe gravity, but he didn't know how it worked. In Principia, Newton described gravity as an ever-present force, a tug that all objects exert on nearby objects. The more mass an object has, the stronger its tug. Increasing the distance between two objects weakens the attraction.Thus, correct option is B i.e. the difference between a scientific and societal law.
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Which statement describes the conditions in which diamonds form?
A.they form deep underground, in certain areas that are under a great deal of pressure.
B.they form as water evaporates on the shores of very salty bodys of water.
C.They form as water evaporates on the shore of any body of water.
D.they form deep underground, in most regions of earth.
Answer:
b for sure
Explanation:
Homeostasis refers to what in regards to living organisms?
Question 4 options:
The chemical processes maintaining balance within the living organism
The way an organism makes food
The organisms Home status
The way an organism captures and uses energy
Ni
Answer:
I think that the answer is B or a
Explanation:
Step 7: Determine the Limiting Reactant (Trial 2)
50
Analysis: The limiting reactant(s) appeared to be
because ...
Answer:
aluminum
no aluminum is left over
Explanation:
the next answers for step 7 are 0.019, 0.0093, aluminum
Answer:
Aluminum because no aluminum is left over
Explanation:
PLeas hurry
Which of the following matches a human action with its impact?
Construction of dam : Scarcity of water for animals
Use of fertilizers : Increase in the population of aquatic animals
Decrease in honeybee population : Increase in plant population
Construction of roads : Improvement in quality of water in local lakes
Answer:
construction aka A
Explanation:
got 100
Which of the following is the smallest particle of matter?
A. Atom
B. Cell
C. Molecule
D. Organ
Answer:
A. Atom
Explanation:
Hope this helps !
A 5.0 g sample of metal was heated to a temperature of 100.0 °C then placed into a calorimeter containing 35 mL of water at 20.0°C.
The final temperature was 26.5°C What is the specific heat capacity of the metal?
The specific heat capacity of the metal : c = 2.59 J/g °C
Further explanationGiven
5 g sample
35 ml water = 35 g
Required
The specific heat capacity of the metal
Solution
Heat can be formulated :
Q = m.c.Δt
Q in = Q out
Q absorbed = Q released
Q water = Q metal
35 g x 4.184 J/g °C x (26.5-20)= 5 x c x (100-26.5)
951.86 J = 367.5 x c
c = 2.59 J/g °C
Calculate the mass of a
molecule of sulfur (IV) oxide
and express it in grams,
kilograms and daltons.Please help
Answer:
10.63 × 10^(-24) g
10.62 × 10^(-27) kg
64 daltons
Explanation:
Formula for sulfur (IV) oxide is; SO2
Now,
Atomic mass of Sulphur is 32 while atomic mass of oxygen is 16.
Thus;atomic mass of SO2 is;
32 + (16 × 2) = 64 amu
Now,
1 mole of a substance has 6.02 × 10^(24) molecules
Therefore mass of 1 molecule of SO2 will yield;
Mass(g) = 64/(6.02 × 10^(24)) = 10.63 × 10^(-24) g
Converting to kg, we have;
10.63 × 10^(-24) ÷ 1000 = 10.62 × 10^(-27) kg
Now, converting to Dalton, we know that;
1kg = 6.022 × 10^(26) amu
Thus; 10.62 × 10^(-27) kg will yield;
(10.62 × 10^(-27) × 6.022 × 10^(26))/1 ≈ 64 amu
Now, from conversion;
1 amu = 1 Dalton.
Thus, 64 amu = 64 daltons
When 80.0 grams of calcium chloride react with silver nitrate, how many grams of silver
chloride are produced?
CaCl2 + 2 AgNO3 - Ca(NO3)2 + 2 AgCI
Answer:
Mass = 206.38 g
Explanation:
Given data:
Mass of calcium chloride = 80.0 g
Mass of silver chloride formed = ?
Solution:
Chemical equation:
CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl
Number of moles of CaCl₂:
Number of moles = mass/molar mass
Number of moles = 80.0 g/ 110.98 g/mol
Number of moles = 0.72 mol
Now we will compare the moles of CaCl₂ and AgCl
CaCl₂ : AgCl
1 : 2
0.72 : 2/1×0.72 = 1.44 mol
Mass of silver chloride:
Mass = number of moles × molar mass
Mass = 1.44 mol × 143.32 g/mol
Mass = 206.38 g
Steel is an alloy that is used in making strong roofs because of its enhanced mechanical and chemical properties. Do you consider steel to be more or less malleable than the elements that make it? Explain your answer. Use in your answer the term lattice energy.
Answer:
Steel is less malleable.
Explanation:
Steel is less malleable than the elements that make it because of the presence of carbon in it. Steel is an alloy of iron and carbon which is harder than iron because of the presence of carbon. Iron in its pure form is softer that able the atoms slip over one another. If carbon is added, they stop the iron atoms from sliding apart so easily. This makes the metal stronger and harder.
Due to its low-density styrofoam isn't economically feasible to recycle and is becoming a widespread pollutant. Styrofoam is polymerized from which starting molecule?
A. Septane
B. Ethylene
C. Styrene
D. Acetylene
PLS HELP THANK YOU!!!
Answer: Polystyrene (PS) is a polymer made from the monomer styrene, a liquid hydrocarbon that is commercially manufactured from petroleum.
Explanation:
What is the charge of an electron?
A-negative
B-neutral
C-positive
D-none of these
what displays the number of atoms, nature and bond types in organic compounds
Answer:
Structural formula
Explanation:
Various type of formulae describe an organic compound. The empirical formula only shows the ratio of atoms of each element present. The molecular formula shows the exact number of atoms of each element present.
Lastly, the structural formula shows us the arrangement of these atoms in space. It shows us the number of atoms, nature and bond types in organic compounds.
The structural formula enables us to picture what the real molecule must look like.
When two atoms are bonded and have a large difference in electronegativity:
HELP PLEASEEE
Answer:
Second option - The bond is very polar
Explanation:
Electronegativity of an basically refers to the degree at which an electron is able to attract electrons to itself.
There are different types of bonds between atoms, depending on the electronegativity of the atoms.
When there is a large difference in electronegativity, it pretty much means that one atom would draw electrons more than the other. When this happens, the bond is said to be polar because there is uneven distribution of the charges.
The second option is the correct answer in thus question.
what is the mass of 5.8 moles of H2S
Answer:
Mass = 197.78 g
Explanation:
Given data:
Number of moles = 5.8 mol
Mass of H₂S = ?
Solution:
Formula:
Mass = number of moles × molar mass
molar mass of H₂S = 34.1 g/mol
by putting values,
Mass = 5.8 mol × 34.1 g/mol
Mass = 197.78 g
Thus, 5.8 moles of H₂S have 197.78 g mass.
Help due at 11:59 I really need to pass this year
Answer:
i think its eye color
hope its right and this helps
The combination of all the forces on an object is called?
Answer:
net force
Explanation: