Answer:
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. What is the specific heat capacity of iron?
Explanation:
The amount of heat absorbed by the gold is 339.1 joules, which was calculated by the formula of specific heat capacity.
What is specific heat capacity?Specific heat capacity, often just called “specific heat”, is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or one Kelvin).
To calculate the amount of heat absorbed by the gold, we can use the formula:
Q = m × c × ΔT
where:
Q = heat absorbed (in joules)
m = mass of the gold (in grams)
c = specific heat capacity of gold (in joules per gram per degree Celsius)
ΔT = change in temperature of the gold (in degrees Celsius)
The specific heat capacity of gold is 0.129 J/g°C.
Substituting the given values into the formula, we get:
Q = 15.5 g × 0.129 J/g°C × (177.4°C - 4.5°C)
Q = 15.5 g × 0.129 J/g°C × 172.9°C
Q = 339.1 J
Therefore, the amount of heat absorbed by the gold is 339.1 joules.
Learn more about specific heat capacity, here:
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Using your own words, explain energy.
If 35.4 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP?
Answer:
ujdbdbfbf fbFbsygtsjysnsgndhngsnsgnafbfa
What is simple chemical test could you carry out to see if carbon dioxide has been produced
Carbon Dioxide
A positive test will result in the lime water turning milky. Lime water turns milky as the Calcium hydroxide (chemical name for limewater) reacts with carbon dioxide to form Calcium Carbonate which is insoluble in water and thus forms a milky white precipitate.
How is the periodic table used to determine properties of elements
Answer:
I don't know
Explanation:
hindi ko alam
Which are different structures of the eye? Select four options.
please help !!!!!!!!
pupil
cochlea
cornea
auricle
retina
lens
Answer:
Pupil, Cornea, Retina, and Lens
Explanation:
Version: TAKEHOME
1) The ionic compound below is soluble in water. Complete the following:
-Draw the interaction of the ionic compound and water in the proper orientation. 3pts
-On the line below discuss the strength of the interaction within the compound compared to the strength of interaction
between the compound and water.
Answer:
The hydrogens of the water molecules around the bromide ion will need to be faced toward it, whereas the oxygens of the water molecules around the potassium ion will need to be faced toward it.
The strength of the interaction within the compound will supersede that of the interaction between the compound and water.
Explanation:
To answer this question, you need to be aware of the structure of a water molecule and its components. A water molecule has the chemical formula of H2O, and oxygen is inherently electronegative, meaning that it attracts electrons very strongly. As a result, when it is in H2O, it pulls the valence electrons of the H atoms very strongly, which results in the H atoms being partially positively charged and the O atom being partially negatively charged. Therefore, the O atom is going to be attracted to the potassium ion, whereas the H atom is going to be attracted to the bromide ion.
The answer to the second part of the question is as written above because ionic bonds are stronger than ion-dipole bonds; that's just the way it is.
How many grams of BaCl2 can be made from 6 moles of Ba?
Answer:
823.98
Explanation:
Since there is only one Ba per atom you simply times 1 by 6 to get the number of mols of Ba per atom, then you times this by the atomic mass of Ba on the periodic table
⚠️NO LINKS⚠️(it will get reported)
In a lab, students measured the mass of an unknown metal to be 46.4 g. The metal sample releases 769 J when it is cooled from 101.0°C to 30,00 °C, the
metal is most likely
Lead
. Copper
Mercury
Silver
Answer:
I'm thinking cooper but not sure
____________ is refining the extracted raw metals into a purest form
Answer:
Extractive metallurgy
Explanation:
Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form.
Ralph's friend invited him to attend a hard rock concert. Ralph did not want to go because he assumed other people who attended would be aggressive and unruly. Ralph's attitude is BEST described as an example of
prejudice
ambiguity
nonconformity
discrimination
impression formation
Answer:
Prejudice
Explanation:
Answer: your answer would be prejudice.
CH4O+ O2 → CO2 + H2O
Balance the following chemical equation
Answer:
2 CH4O + 3 O2 = 2 CO2 + 4 H2O
A sample of hydrogen gas has a volume of 145 mL when measured at 44
degrees C and 1.47 atm. What volume would the hydrogen sample occupy
at STP?
Answer:
[tex]186.01\ \text{mL}[/tex]
Explanation:
[tex]P_1[/tex] = Initial pressure = 1.47 atm
[tex]P_2[/tex] = Final pressure = [tex]10^5\ \text{Pa}[/tex]
[tex]T_1[/tex] = Initial temperature = [tex]44^{\circ}\text{C}[/tex]
[tex]T_2[/tex] = Final temperature = [tex]273.15\ \text{K}[/tex]
[tex]V_1[/tex] = Initial volume = 145 mL
[tex]V_2[/tex] = Final volume
We have the relation
[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\Rightarrow V_2=\dfrac{P_1V_1T_2}{T_1P_2}\\\Rightarrow V_2=\dfrac{1.47\times 101325\times 145\times 273.15}{(44+273.15)\times 10^5}\\\Rightarrow V_2=186.01\ \text{mL}[/tex]
Final volume of the sample is [tex]186.01\ \text{mL}[/tex].
(Answer ASAP)
In which state(s) of matter could a substance have thermal energy?
A) Only liquids and gases
B) Only liquids and solids
C) Only liquids
D) Liquids, solids, and gases
4.2 L of a gas has a pressure of 560mmHg at 72⁰F. What is the temperature at760mmHg if the volume is still 4.2 L? (5 pts)
Answer:
The temperature at 760mmHg if the volume is still 4.2 L is 400.862 K
Explanation:
Gay Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. This law can be expressed mathematically as follows:
[tex]\frac{P}{T} =k[/tex]
Having an initial state 1 and a final state 2, the following is true:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 560 mmHgT1= 72 F= 295.372 K (being 32 F= 273.15 K)P2= 760 mmHgT2= ?Replacing:
[tex]\frac{560 mmHg}{295.372 K} =\frac{760 mmHg}{T2}[/tex]
Solving:
[tex]T2= 760 mmHg*\frac{295.372 K}{560 mmHg}[/tex]
T2= 400.862 K
The complete
conversion of 90.0
grams of hydrogen to
ammonia would require
how many moles of
nitrogen gas?
Answer:
15moles
Explanation:
The balanced equation of this reaction is as follows:
N2 + 3H2 → 2NH3
Molar mass of H2 = 2g/mol
mole = mass/molar mass
mole = 90/2
mole = 45moles.
Based on the above balanced equation, 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2)
Hence, 45moles of hydrogen gas will produce (45 × ⅓) = 15moles of nitrogen gas (N2).
Answer:
Its 14.9 for those who are doing the escape room :)
Explanation:
HURRY ILL GIVE BRAINLIEST!
Match the cause to its effect.
Answer:
Cattles are giving nutrition supply throughout the year----some animals require nutrient enhancement for health
calves are given colostrum at birth----newborns require antibodies from their mothers
I dont want to write, so you know what the last option is
Explanation:
:) hope this helps
The unit for work is the _______ which is also called the ____________.
What are the controlled, independent, and dependent variables in a basic density column experiment?
WILL MAKE BRAINLIEST
Answer:
The Independent Variable is what we change or control in the experiment. The Dependent Variable is what we are testing and will be measured in the experiment. The Control Variables are what we keep the same during the experiment to make sure it's a fair test. hope this helps =)
Explanation:
Una solución hallar punto de vista física y punto de vista químico (sal) 50g de sal y 250 ml de agua hallar %m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente
Answer:
% m/m = 16.6%
% m/v = 20%
3.42 m (molalidad)
3.42 M (molaridad)
Fraccion molar del soluto = 0.06
Fraccion molar del solvente = 0.94
Explanation:
Nuestra solución está compuesta por:
Soluto: 50 g de sal
Solvente: 250 mL de agua.
%m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente son distintas formas de definir la concentración:
% m/m son los gramos de soluto cada 100 g de solución.
No sabemos la masa de solución pero con la densidad del agua (solvente), sabemos que los 250 mL contienen 250 gramos de solvente. (Densidad del agua 1g/mL). En conclusión, la masa de solución es 50 g + 250g = 300
% m/m = (50g /300g ) . 100 = 16.6%
Vamos a definir que el volumen de la solución es igual al del solvente: 250 mL.
% m/v = la masa de soluto, cada 100 mL de solución
= (50 /250) . 100 = 20 %
Molalidad, son los moles de soluto por cada kg de solvente.
Convertimos gramos a kg → 250 g . 1kg /1000g = 0.25kg
Convertimos la masa de soluto (sal) a moles.
NaCl → 50 g . 1mol/ 58.45g = 0.855 moles
m = 0.855 /0.25 → 3.42 m (molalidad)
Molaridad son los moles de soluto por cada L de solución.
Convertimos mL a L → 250 mL . 1kg / 1000mL = 0.25 L
sabiendo que los moles de soluto son 0.855, en este caso la molaridad es igual a la molalidad ( 3.42 M)
Para calcular la fracción molar, necesitamos moles de soluto y de solvente.
Ya contamos con los moles de soluto.
Moles de solvente: 250 g . 1mol /18g = 13.89 mol
Moles totales = 0.855 + 13.89 = 14.745
Fracion molar del soluto: (0.855/ 14.745) = 0.06
Fraccion molar del solvente: (13.89 / 14.745) = 0.94
solve the following equation:13x - 22 = 30
Answer:
52/13
Explanation:
13X=30+22
x=52/13
Why do you think it is a bad idea to use taste, touch, or smell to identify an
unknown chemical?
Answer:
Because it can cause health problems or injuries to our sense organs.
Explanation:
Chemicals in the laboratory are made up of different constituents, which may be dangerous or injurious to health. This is the reason why safety measures or precautions have to be taken when working in the laboratory. One of those safety measures is that "one should never use taste, touch, or smell to identify an unknown chemical".
This is so because a chemical that is unknown amounts to the fact that what such chemical contains is unknown, hence, the chemical might have the ability to cause harm or injuries to the sense organ. For example, a conc. acid that is tasted will burn the tongue etc.
116
Sn
50
Write the complete nuclear equation for alpha absorption
HELP ASAP!!!
WAVES ALWAYS ORIGINATE WITH SOME
a
person
b
object
C
disturbance
Answer:
Disturbance
Explanation:
I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.
Which statement describes proper conduct in the laboratory?
Select one:
O a. Eating snacks in the laboratory is allowed.
O b. In order to identify things they should be tasted.
O c. Colorless fumes should be identified by direct smelling.
O d. Be aware of the location of safety and first aid equipment.
Answer:
D.
Explanation:
I mean. It's logic for sure
Answer:
Its D and pls mark brainliest
Explanation:
PLEASEEEE HELPPP??????
Answer:
(B) Grasses to Grasshoppers to Birds to Foxes
Explanation
CH3OH can be synthesized by the reaction:
CO(g) + 2 H20) — CH3OH)
What volume of CH3OH gas (in L) can be synthesized if 18.6 L of Hy gas completely reacts at STP conditions?
Answer:
5
Explanation:
Sam did an experiment. He boiled water in a teapot and saw vapor coming out. When he placed a cold plate in contact with the vapor it formed droplets of water.? Can you imagine what was that process and Why did he observe this?
Answer:
evaporation and condesation
Explanation:
because he was curiuos
Describe a method to investigate how the temperature changes when different masses of ammonium nitrate are dissolved in water
Answer:
Endothermic and Exothermic Reactions
Endothermic and Exothermic ReactionsIn this experiment you are investigating whether dissolving ammonium nitrate in water is an endothermic or exothermic reaction. An endothermic reaction absorbs energy from its surroundings (heat), so the reaction gets colder.
Explanation:
Don't forget to mark me as brainliest answer ☺
लेख्नुहोस् । (Deserts are very hot during the day and very cold
during the night. Give reason.)
Because deserts have such little water vapor in the air, it makes it harder to trap heat or cold in a desert. And at night, the sun no longer heats the desert and the heat from the day doesn't stay trapped. Because of this, some deserts can get extremely cold at night, dropping to temperatures below 40F.
Hope this helps!! Have a wonderful day!!
It is actually sand, which turns the entire phenomenon hot. Sand cannot hold the heat. It acts like a mirror to the sun. During the daytime, it stays warm, and when the Sun is absent it loses all its heat making the nights colder. There’s nothing in the desert that can either absorb heat from the sun or hold it on the surface when the sun is set.
✓ What kind of carbon storages would be the most affected by humans?
Answer: Burning fuels?
Explanation: I’m not very sure actually