Answer: Formula: q = mcΔT,
- q is the amount of heat transferred
- m is the mass of the substance
- c is the specific heat capacity of the substance
- ΔT is the change in temperature
q= 733 J
m= 312g
ΔT = 15 °C
Calculate this together = 733 J / 312g x 15 °C
= and then you can find your answer for c.
Explanation:
Na2SO4(aq) + CaCl2(aq) --> CaSO4(s) +
2NaCl(aq) is an example of which type of
reaction?
decomposition
synthesis
single replacement
double replacement
Answer:
double replacement
Explanation:
How many moles of Iron (II) oxide are present in a 34.5 gram sample?
Answer:
0.609 Is the answer.
Explanation:
I hope this helped
An experiment shows that a 118 mL gas sample has a mass of 0.161 g at a pressure of 730 mmHg and a temperature of 32 ∘C.
What is the molar mass of the gas?
Answer:
35.54g/mole
Explanation:
using the formula PV=nRT will allow you to solve for n which is the number of moles. R is a constant and you should use 62.3637 L mmhg/mol K.
In order to make sure your units match you have to convert the 118ml of gas to .118L and temperature needs to be converted to Kelvin. 32C + 273=305K
now you can use the formula to solve for n = number of moles once you get that number you will need to divide that by .161g. Molar mass is g/moles
4
Isotopes are atoms of the same element with the same number of
protons and
(0.5 Points)
O a different number of neutrons.
a different number of electrons
a different number of molecules
the same number of neutrons
Answer:
a. is tae answer
Explanation:
tamapoyang sagot ko)
What is the electron configuration for germanium (Ge)?
Answer:
[Ar] 3d¹⁰ 4s² 4p²
Explanation:
What makes scientists think that arctic areas were once warm?
they found wooly mammoths there
O they found fossils of horses there
they found fossils of coral there
O the different layers of snow and ice
Answer:well the ice preserves the wooly mammoths
Explanation:its not just snow its bacteria witch means that once living to frozen thats how they know how it looks like and to see what animal its related to now day it related to the elephants
A container of nitrogen gashas a pressure of 256.4mm Hg at 362K. If the temperature is decreased to 251K, what is the pressure of the gas in the container?Circle the Correct Answer: (106mmHg or 178mmHg)
PLS HELP MY HOMEWORK IS DUE IN AN HOUR
How many moles of Fe2O3 can be made from 50 moles of Fe?
Answer: Synthesis
0.84 moles of oxygen
25 moles of [tex]Fe_2O_3[/tex]
Explanation:
The balanced chemical equation is:
[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
This is a synthesis reaction as one product is formed by combination of two reactants.
According to stoichiometry :
a. 2 moles of [tex]Fe_2O_3[/tex] require = 3 moles of [tex]O_2[/tex]
Thus 0.56 moles of [tex]Fe_2O_3[/tex] require=[tex]\frac{3}{2}\times 0.56=0.84moles[/tex] of [tex]O_2[/tex]
b. 4 moles of [tex]Fe[/tex] give = 2 moles of [tex]Fe_2O_3[/tex]
Thus 50 moles of [tex]Fe[/tex] give =[tex]\frac{2}{4}\times 50=25moles[/tex] of [tex]Fe_2O_3[/tex]
help plz 8th grade science
Answer:
B
Explanation:
Brainlest is apprciatedddddddddddd
Determine the number of grams in 0.5 moles of H2 S04
How many molecules of calcium chloride are in 3CaCl2
the structure of cyclopentane-1,2-diol
Answer: five carbon atoms forms a ring. In adjacent two carbon atoms
An hydroxyl group (-OH) is attached. Molecular formula is
C5H8(OH)2
Explanation:
Is mercury chloride ionic or covalent
Answer:
ionic
Explanation:
ionic compounds contain a metal and a nonmetal. Mercury is a metal and Chlorine is a non metal
According to Reference Table G, how does a
decrease in temperature from 40°C to 20°C affect
the solubility of NH3 and KCl?
A) The solubility of NH3 increases, and the
solubility of KCl increases.
B) The solubility of NH3 increases, and the
solubility of KCl decreases.
C) The solubility of NH3 decreases, and the
solubility of KCl increases.
D) The solubility of NH3 decreases, and the
solubility of KCl decreases.
Answer:
A) The solubility of NH3 increases, and the
solubility of KCl increases.
Explanation:
The solubility of ammonia and potassium chloride increases with decrease in temperature from 40°C to 20°C.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
Learn more about solubility,here:
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(WORTH 40 PTS.) Are the compounds in Figure 21-3 substituted hydrocarbons? How do you know?
Answer:
Yes
Explanation:
The compounds have both hydrogen and carbon only which are atoms that make up the hydrocarbons and they are also gases at room temperature
is air a pure substance
No, air is not a pure substance. Because air contains other gases like Nitrogen, Carbon monoxide etc..,
How many grams of chlorine gas can be produced from the decomposition of 1.46x1023 formula units of AuCl3?
2 AuCl3 2 Au + 3 Cl2
Group of answer choices
A.33.6 g
B.25.8 g
C.195 g
D.11.4 g
Answer:
c
Explanation:
can someone let me know if i did this right ?
The number of grams of sulfur in 223 grams of sodium sulfate is . . . Grams And explain how, I still dont get it fully
Answer:
50.25 g of sulphur, S.
Explanation:
Mass of Na₂SO₄ = 223 g
Mass of sulphur =?
Next we shall determine the molar mass of Na₂SO₄. This can be obtained as follow:
Molar mass of Na₂SO₄ = (23×2) + 32 + (16×4)
= 46 + 32 +64
= 142 g/mol
Mass of S in 142 g of Na₂SO₄ = 32 g
Finally, we shall determine the mass of S in 223 g of Na₂SO₄. This can be obtained as follow:
142 g of Na₂SO₄ contains 32 g of S.
Therefore, 223 g of Na₂SO₄ will contain = (223 × 32) / 142 = 50.25 g of S.
Thus, 223 g of sodium sulfate, Na₂SO₄ contains 50.25 g of sulphur, S.
What is the function of the right side of the heart?
takes in oxygen rich blood from the lungs
carries oxygen and nutrients from the arteries to the tissues
releases oxygen rich blood to the veins
takes in blood from the body that has no oxygen
What is the mass of 3.25 moles of sodium hydroxide (NaOH)?
Answer:
1 mole is equal to 1 moles NaOH, or 39.99711 grams.
Explanation:
Hope this helps have a nice day :)
The statement of the mass of sodium hydroxide (NaOH) is "130 g."
What is mass?A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.
In order to determine the mass in grams, multiply moles of the substance value by its molar mass to convert moles into grams.
Mole to gram conversion factor,
[tex]=\;given \;mole\;.\;\frac{grams}{1\;mol}[/tex]
Mass of NaOH comes out to be,
[tex]=\;3.25\;mol\;.\;\frac{39.997\;g}{1\;mol}[/tex]
= 129.99 g
= 130 g
Hence the correct answer is 130 g.
Learn more about mass here
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during a chemical reaction, a substances composition changes. What does composition relate to in this context
Answer:
Composition can be referred to as it's build.
Explanation:
An example is when wood is burned, its structure is no longer compact. It is now ash.
The reaction Ni(s) + S(s) --> NIS(s) is an example of which type of reaction?
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An analysis of a saturated solution of silver chromate, Ag2CrO4, reveals that the concentration of Ag+ is 1.3 x 10-4 Molar. What is the Ksp of Ag2CrO4? A. 2.3 x 10-12 B. 8.8 x 10-12 C. 1.9 x 10-8 D. 1.3 x 10-4 E. 3.1 x 10-4
Answer:
B. 8.8 x 10⁻¹²
Explanation:
In aqueous solution, silver chromate (Ag₂CrO₄) dissociates into ions as follows:
Ag₂CrO₄(s) ⇄ 2 Ag⁺(aq) + CrO₄²⁻(aq)
2s s
So, the expression of the Ksp of Ag₂CrO₄ is derived from the concentrations of the ions at equilibrium raised by the stoichiometric coefficients:
Ksp = [Ag⁺]²[CrO₄²⁻] = (2s²)s = (4s²)s = 4s³
Since s = [Ag⁺] = 1.3 x 10⁻⁴ M, we calculate the Ksp as follows:
Ksp = 4s³= 4(1.3 x 10⁻⁴)³ = 8.79 x 10⁻¹² M
Therefore, the correct option is B. 8.8 x 10⁻¹²
Newton's Third Law of Motion: "For every action there is an equal and opposite reaction." What is a force pair? Are they easy to identify?
Answer:
A force pair is a couple of forces which are acting on any given body from opposite directions called action-reaction forces.
One can simply identify the force pair by identifying two objects which are interacting and by describing who is pushing whom and by identification of their drawing.
A book resting on table has two participants, a book applying force downwards due to gravity and the table pushing it away from the earth surface. These are action and reaction forces.
PLEASE HELP ME ON THIS QUESTION ASAP!!!!
Answer:
To support the body, protect the organs, produce blood cells, and store calcium.
What is the name of FeO4
Answer:
Ferrate (VI)
Explanation:
Will mark brainly
ASAP
Answer:
A. Shivering
Explanation:
This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled.
NO FAKE ANSWERS WILL GIVE BRAINLIEST
One mole of copper has a mass of 63.5 grams. Approximately how many atoms of copper are present in one mole of copper?
63 atoms
64 atoms
32 × 1023 atoms
6 × 1023 atoms
Answer:
6 × 10^23 atoms
Explanation:
This is because Avogadro's number aka 6.02 x 10^23 is applicable to every element and is the number of atoms in any 1 mole of an element. The answer 6 x 10^23 is closest to 6.02 x 10^23 because the 6.02 was rounded to just 6. Hope this helps :)
Answer:
The answer is D)
Explanation:
6 X 10^23
When we put elements on the periodic table we use the______
mass.
Answer:
They are placed on the periodic table based on their atomic number.
Explanation:
In the chemistry table, you can find the molecular mass and atomic number. Atomic number represents the number of the protons of an atom, and molecular mass represents the mass of the atom. The mass of an atom is made from proton and neutron. The element is made by arranging it based on the number of protons, which was the atomic number.
Answer:
When we put elements on the periodic table we use the atomic mass