Answer:
Final temperature, T2 = 381.28°C
Explanation:
Given the following data;
Mass = 6.23 g
Initial temperature = 30.4°C
Heat capacity = 282 J
Specific heat capacity = 0.129 J/g°C
To find the final temperature;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making dt the subject of formula, we have;
[tex] dt = \frac {Q}{mc} [/tex]
Substituting into the equation, we have;
[tex] dt = \frac {282}{6.23*0.129} [/tex]
[tex] dt = \frac {282}{0.8037} [/tex]
dt = 350.88°C
Now, the final temperature T2 is;
But, dt = T2 - T1
T2 = dt + T1
T2 = 350.88 + 30.4
Final temperature, T2 = 381.28°C
How many moles of gallium chlorate, Ga(ClO3)3, must react in order to produce 674 kJ of energy according to the following reaction? 2 Ga(ClO3)3 à 2 GaCl3 + 9 O2 DH = - 130.4 kJ
Answer:
10.3 mol Ga(ClO₃)₃
Explanation:
Let's consider the following balanced thermochemical equation.
2 Ga(ClO₃)₃(s) ⇒ 2 GaCl₃(s) + 9 O₂(s) ΔH = - 130.4 kJ
According to the balanced thermochemical equation, 130.4 kJ of heat are released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:
674 kJ × 2 mol Ga(ClO₃)₃/130.4 kJ = 10.3 mol Ga(ClO₃)₃
Thermochemical equations are chemically balanced equations that take into account both the energy change and the physical states of all reactants and products. Energy is a reactant in an endothermic process, whereas it is a product in an exothermic reaction. Here the moles of Ga(ClO₃)₃ is 10.3 mol.
Let's consider the following balanced thermochemical equation.
2Ga(ClO₃)₃(s) ⇒ 2GaCl₃(s) + 9O₂(s) ΔH = - 130.4 kJ
According to the balanced thermochemical equation, 130.4 kJ of heat is released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:
674 kJ × 2 mol Ga(ClO₃)₃ / 130.4 kJ = 10.3 mol Ga(ClO₃)₃
To know more about thermochemical equation, visit;
https://brainly.com/question/10384873
#SPJ6
Write the molecular formula of poly(glycine)
Answer:
C2H5NO2
Explanation:
Glycine | C2H5NO2 - PubChem.
weight of glycine= 75.07 g/mol
Add coefficients to balance the equation to make water.
H2(g) +O2 (g)H20 (1)
Answer:
2H2+2O2=2H2O
Explanation:
hope this helps
____CO + ____H2 ----> ____C8H18 +____H2O
A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide,
oxygen, and nitrogen. Which term most likely describes what she is measuring?
O final pressure
O atmospheric pressure
O combined pressure
O partial pressure
Answer:
D. Partial pressure
Explanation:
Partial pressure is the individual pressure exerted by each gas present in a gaseous mixture. As he is measuring the pressure of each gas in the atmosphere separately, so PARTIAL PRESSURE is the exact term for his measurement.
What can be different between the products and reactants in a balanced chemical equation?
Answer:Reactants are starting materials and are written on the left-hand side of the equation. Products are the end-result of the reaction and are written on the right-hand side of the equation.
Explanation:
The reactants in a balanced chemical reaction are the starting material which reacts together to give the products in by the regrouping of atoms in the reactants.
What is a balanced chemical equation?The balanced chemical equation of a reaction represents the perfect stoichiometry of each reactants and products with their states of matter in brackets.
In a balanced reaction, the number of each element in the reactant side must be equal to their number in the product side. The number of each elements and groups in a reaction can be balanced by multiplying with suitable integers.
The atoms in the reactants are regrouping to form the products. Thus, the identity of the new products is entirely different form that of reactants in the reaction.
To find more on balanced reactions, refer here:
https://brainly.com/question/14280002
#SPJ2
How many moles of H2O are produced from 3 moles of oxygen? 2H2 + O2 --> 2H2O
Answer: 6 mol
Explanation:
From the equation, we know that for every mole of oxygen consumed, 2 moles of water are produced.
This means that if 3 moles of oxygen are consumed, 3(2) = 6 mol of water are produced.
why does solid silver, Ag, conducts electricity while solid silver chloride, AgCl, does not.
Answer: A solid silver, Ag, conducts electricity because it contains ions or electrons while solid silver chloride, AgCl, does not conduct electricity because AgCl does not dissociate to give ions or electrons.
Explanation:
Solid silver (Ag) is considered to be a good conductor of electricity because there are more number of free electrons or movable atoms are present in it.
As electricity is the flow of ions or electrons. So, more is the number of ions or electrons present in a substance more will be its conductivity.
Whereas solid silver chloride is a precipitate that is insoluble in water and therefore, it will not give ions or electrons.
As a result, silver chloride is not able to conduct electricity.
The [H+] is 0.001 M. What is the pH?
How many units long is the circumference of a circle with diameter of 18 units?
Answer:
56.52 units
Explanation:
hope that helps :)
Identify the limiting reactant when 2.20 g of calcium reacts with 4.5 g of chlorine gas to produce calcium chloride. Write a balanced equation before starting.
I"LL GIVE YOU 30 POINTS AND NAME YOU BRAINLIEST IF YOU ANSWER THIS FOR MEEEEE PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ ITS FOR MY STUDY GUIDE!!!!!!
Answer:
2.20*4.5=?? you have to solve the multiplication ok, or its not learning
Explanation:
A nebula is often made up of hydrogen and helium gases.
True
False
Answer:
Nebulae are made of dust and gases—mostly hydrogen and helium. ... Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star.
Explanation:
Hope this helps
1.Peptide bond formation is accomplished as the amine nitrogen of the an-tRNA in the ____ carries out a _____ of the amino acid bound to the _____. a.A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site b.P site, nucleophilic attack on the carbonyl carbon, tRNA of the A site c.A site, acidophilic attack on the carbonyl carbon, tRNA of the P site d.A site, electrophilic attack on the carbonyl carbon, tRNA of the P site e.P site, electrophilic attack on the carbonyl carbon, tRNA of the A site
Answer:
A
Explanation:
A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site
Marie Curie's work with radioactive materials eventually lead to her death. At the age of 66, what
disease did Madame Curie die from?
Answer:
Radiation-induced Luekimia
Explanation:
They worked with many radioactive elements, so it caused Leukemia which is
a disease in which the bone marrow and other blood-forming organs produce increased numbers of immature or abnormal leukocytes.
Hoped this helped
A pacemaker:
A. sends electrical impulses to a prosthesis, causing it to move
through brain signals.
B. measures the distance traveled with a prosthetic leg.
C. tracks the speed traveled with a prosthetic leg and adjusts
movements accordingly.
D. sends electrical impulses to the heart, causing it to beat more
regularly
SUEMIT
DIRECTIONS: Underline the selected word item that best completes the statements.
1. (Climate, Weather) is an overall atmospheric condition of a place of 30 years
and more while (Climate, Weather) is a condition for a short period of time.
2. (Climate, Weather) is influenced by latitude, altitude, ocean current, and
topography.
3. The (higher, lower) the altitude, the (colder, warmer) the climate.
4. (Windward, Leeward) area of the mountain forms precipitation while (Windward,
Leeward) gives dry air and warm weather.
5. Ocean currents bring (cold, warm) water and rain from the equator to the
poles and (cold, warm) water from the poles toward the equator
Explanation:
(Climate, Weather) is an overall atmospheric condition of a place of 30 years and more while (Climate,Weather) is a condition for a short period of time.
2. (Climate, Weather) is influenced by latitude, altitude, ocean current, and topography.
3. The (higher, lower) the altitude, the (colder, warmer) the climate.
4. (Windward, Leeward) area of the mountain forms precipitation while (Windward,Leeward) gives dry air and warm weather.
5. Ocean currents bring (cold, warm) water and rain from the equator to the poles and (cold, warm) water from the poles toward the equator
Which two processes of the water cycle absorb energy from the Sun?
A evaporation and precipitation B sublimation and evaporation C condensation and transpiration D precipitation and condensation
Answer: of Earth's atmosphere occurs as energy, primarily from the sun, causes liquid water to transform to another phase. As this occurs, liquid water absorbs energy, causing it to evaporate and form water vapor. The process of evaporation absorbs tremendous amounts of incoming solar energy.
Explanation:
Calculate the number of moles found in 3.045x1024 atoms of helium.
PLS HELP
Explanation:
so for this u have to use this equation where
Moles = number of particle/6.02×10^23
= 3.045 × 10^24/6.02×10^23
= 5.0581
write it to 3 S.F so 5.06 moles
proper significant figure: 27.01 + 14.369
Answer:
put the bigger number on top then addExplanation:
41.369
Which type of reaction does an element replace an ion in a compound, forming a new compound and new element?
a
Synthesis
b
Decomposition
c
Single Replacement
d
Double Replacement
e
Combustion
Answer:
The answer is c . Single Replacement
Explanation:
A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.
How does renal regulation at the kidneys work in removing acid and restoring equilibrium
Answer: The kidneys help maintain the acid–base balance by excreting hydrogen ions into the urine and reabsorbing bicarbonate from the urine.
Explanation:
Water absorbs energy when it undergoes___
A. freezing
B. deposition
C. condensation
D. melting
Answer:
d. melting
As heat enters the water the particles move much faster, bumping into each other. Therefore, more heat means more energy!
Hopesthis helps!
An atom has 23 protons and 24 neutrons. Write both its NAME and it's SYMBOL using isotope notation.
Answer:
Vanadium is the name and the symbol is V #23
Explanation:
Which of the following statements is FALSE? *
a.Smog is a phenomenon brought about by natural events.
b.Forest fires may be caused by human activities or by natural events.
c.Volcanic eruptions may contribute large amounts of pollutants to the atmosphere.
d.Under normal condition, the greenhouse effect maintains a temperature that support life on Earth.
Answer:
A:smog is a phenomenon brought about by natural events
Explanation:
false because of how phenomenon it is smog did not bought phenomenon and natural events!!
DOES THIS HELPFUL?
Which combinations of particles form ionic bonds/compounds?
Answer:
Iconic bond is formed by cation and anion. A compound is made when atoms of two or more elements bond in a chemical reaction.
Explanation:
HELPPPP ASAPP 10 POINTS
How much of a 60.0 gram sample of Carbon-14 DECAYED after 17,100 if 5
its half-life= 5,700 years? *
7.50 g
52.5 g
15.0 g
30.0 g
The mass of 60 g of carbon -14 remains after 17100 years is 7.50 g. Thus, option a is correct.
What is radioactive decay?The unstable isotopes of atoms undergo radioactive decay by the emission of charged particles. The radioactive decay is a first order reaction.
The rate constant k = 1/t ln (M0/Mt)
where, M0 and Mt be the initial mass and mass after t respectively.
Given the initial mass = 60 g
half life t1/2 = 5700 years.
decay constant k = 0.693 / t1/2
= 0.693 / 5700 = 0.00012 yr⁻¹
Apply the values in the first order rate constant equation as follows:
0.00012 yr⁻¹ = 1/ (17100 yrs) ln (60/Mt)
60/Mt = 7.996
Mt = 7.50 g.
Therefore, the mass of the mass of 60 g of carbon -14 remains after 17100 years would be 7.50 g.
To find more on radioactive decay, refer here:
https://brainly.com/question/1770619
#SPJ2
Bacteria live on skin of humans. The bacteria receive food and shelter form human beings. Most bacteria are harmless and pose little or no threat to humans. This is an example of
Answer: symbiotic relationship
Explanation:
Using a Punnett square, what genotypes would you expect in the F2 offspring?
F1 generation
F2 (option A)
F2 (option B)
Father
Father
Father
A
A
A
A
A
a
Mother
Mother
Mother
a
Аа
«Аа
a
Аа
Аа
А
AA
Аа
a
Аа
Аа
a
Аа
Aai
aa
a
А
Answer:
can you answer mine i will help you! please
Explanation:
What is the fixer solution equation?
Answer:
Fixation involves these chemical reactions (X = halide, typically Br−): AgX + 2 S2O32− → [Ag(S2O3)2]3− + X. AgX + 3 S2O32− → [Ag(S2O3)3]5− + X. In addition to thiosulphate the fixer typically contains mildly acidic compounds to adjust the pH and suppress trace amounts of the developer.