Answer:
the sun is an example of radiant energy
Answer:
a.the sun
Explanation:
Fields in which this terminology(the body of terms used with a particular technical application in a subject of study, profession) most often used are telecommunications,(communication over a distance by cable, telegraph, telephone, or broadcasting.) heating, radiometry, lighting, and in terms of energy created from the sun.
and
can
The law of conservation of mass states that
neither be
nor
Answer:
The law of conservation of mass states that the quantity of the mass can neither be added to, neither can it be removed. The greater picture's mass will always be the same amount.
Which of the following contains polyatomic ion?
Oa
BeHCO
Ob
PCI
Ag!
Mgs
1. How much 6.0 M HNO3 is needed to neutralize 39 mL of 2.0 M KOH?
2. How much 3.0 M NaOH is needed to neutralize 30. mL of 0.75 M H2SO4?
3. What is the concentration of 20 mL of LiOH if it is neutralized by 60 mL of 4 M HCl?
4. What is the concentration of 60 mL of H3PO4 if it is neutralized by 225 mL of 2 M Ba(OH)2?
5.How much 2 M HBr is needed to neutralize 380 mL of 0.1 M NH4OH?
Answer:
For 2. the answer is 15.0 mL
For other examples, you can solve by exact way as I have solved the 2nd example.
I have writen down all the balanced chemical reaction equation for examples 1, 3, 4, 5 for you. ( picture 2 )
Explanation:
Please see the step-by-step solution in the picture attached below.(picture 1)
Hope this answer can help you. Have a nice day!
How many moles are there in 135g of aluminum ?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Aluminium, or 26.981538 grams.
what happens to the ammonia and hydrogen gases generated in common zinc carbon dry cell..?
Answer:
A zinc- carbon battery dry cell primary that delivers about 1.5 volts of direct current.
Explanation:
hydrogen gas escapes while retaining the aqueous electrotype.
In an ecosystem
1. living things interact with each other
2. living things interact with their environment
3. both of the above
both
Explanation:
an ecosystem is the environment they live in which includes other living things
Answer:
3. both of the above
Explanation:
Living things interact with each other. Suppose you have a pond. It is an ecosystem. The fish in the pond interact with each other, and may even interact with other species like frogs or insect by eating them or living peacefully with them. Living things also interact with their environment such as fishes or some organisms might interact with the plants, logs, the available sunlight, all sorts of these factors which make up the environment.
Thus organisms within an ecosystem interact with each other and their environment.
Given:
CH4 + 2O2 → CO2 + 2H2O, ΔH = -890 kJ/mol
How much energy is released when 59.7 grams of methane (CH4) reacts with oxygen?
The combustion of 59.7 grams of methane releases ____ kilojoules of energy
Answer:
The combustion of 59.7 grams of methane releases 3320.81 kilojoules of energy
Explanation:
Given;
CH₄ + 2O₂ → CO₂ + 2H₂O, ΔH = -890 kJ/mol
From the combustion reaction above, it can be observed that;
1 mole of methane (CH₄) released 890 kilojoules of energy.
Now, we convert 59.7 grams of methane to moles
CH₄ = 12 + (1x4) = 16 g/mol
59.7 g of CH₄ [tex]= \frac{59.7}{16} = 3.73125 \ moles[/tex]
1 mole of methane (CH₄) released 890 kilojoules of energy
3.73125 moles of methane (CH₄) will release ?
= 3.73125 moles x -890 kJ/mol
= -3320.81 kJ
Therefore, the combustion of 59.7 grams of methane releases 3320.81 kilojoules of energy
Answer:
The combustion will release -3,321 KJ/mol of energy
Explanation:
7. Cigarette smoke and UV radiation are two
examples of a
Answer:
carcinogen
Explanation:
cigarette smoke and UV radiation both of the capability to cause cancer cells in living tissue, meaning they can both be classed as carcinogens
5. On what organ does alcohol have the most noticeable effect?
Answer:
the liver
Explanation:
it processes alcohol, work very hard
How much K2Cr2O7 is needed to create a saturated solution in 400 grams of water at 50oC?
Answer:
The mass of K₂Cr₂O₇ needed to create a saturated solution in 400 grams of water at 50°C is 120 grams
Explanation:
To answer the question, we will be required to know the solubility of potassium dichromate, K₂Cr₂O₇ in H₂O at 50°C
From the solubility curve, we have, 30 g of K₂Cr₂O₇ will be required to create a saturated solution in 100 g of at 50°C. Therefore, the amount of K₂Cr₂O₇ that will be required to create a saturated solution in 400 g of water, is given by the following equation;
[tex]400 \times \frac{30 \, g \ K_2Cr_2O_7}{100g \ H_2O} = 120 \, g[/tex]
Therefore, the mass of K₂Cr₂O₇ needed to create a saturated solution in 400 grams of water at 50°C = 120 grams.
Answer:
Approximately 128 g of K₂Cr₂O₇ will saturate 400 g of water.
Explanation:
From Literature and solubility curves, the solubility of K₂Cr₂O₇ at 50°C was obtained to be approximately 32 g/100 mL.
Solubility of K₂Cr₂O₇ in water at 50°C = 32 g/100 mL of water
So, how much K₂Cr₂O₇ will dissolve in 400 g of water?
Density of water = 1 g/mL
So, 1 g of water = 1 mL of water
400 g of water = 400 mL of water.
So, if 100 mL of water dissolves 32 g of K₂Cr₂O₇
400 mL of water will dissolve (32 × 4) g of K₂Cr₂O₇, that is, 128 g of K₂Cr₂O₇.
Hope this Helps!!!!
What is the percentage composition of cobalt in cobalt(II) fluoride, CoF2?
Answer:
60.8%
Explanation:
We'll begin obtaining the molar mass of cobalt(II) fluoride, CoF2. This can be done as shown below:
Molar mass of CoF2 = 59 + (19x2) = 97g/mol.
The percentage composition of cobalt in cobalt(II) fluoride, CoF2 is given by:
Mass of Co/Molar Mass of CoF2 x 100
=> 59/97 x 100 = 60.8%
Therefore, the percentage composition of cobalt in cobalt(II) fluoride, CoF2 is 60.8%
what does Reproducibility mean? Plz help me
Answer:
the ability to be reproduced or copied.
Explanation:
Answer: the ability of an entire experiment or study to be reproduced, either by the researcher or by someone else working independently.
Which statement describes how a basic coffee cup calorimeter works?
OOO
It measures the mass of a substance given the specific heat and temperature of water in a cup of known size.
It measures the density of a substance given the mass, specific heat, and temperature of water in a cup of known size,
It uses the mass and specific heat of water along with a pressure gauge to measure the gain or loss of energy when a substance is
added.
It uses the mass and specific heat of water along with a thermometer to measure the gain or loss of energy when a substance is
added.
Answer:
It uses the mass and specific heat of water along with a thermometer to measure the gain or loss of energy when a substance is added.
Explanation:
The calorimeter is an instrumental device, which is used to measure the heat of chemical reactions. The heat is measured when the reactants change their state in specified conditions.
The correct answer is:
Option D. It uses the mass and specific heat of water along with a thermometer to measure the gain or loss of energy when a substance is added.
The coffee cup calorimeter works as:
1. Coffee cup is a type of insulator. The cup of styrofoam with an inserted thermometer can calculate the heat transfer.
2. The thermometer is used to measure the change in the enthalpy of the reaction.
3. The water in the cup absorbs the heat from a reaction, and the cup is adiabatic. Thus, the outer cup is an insulator.
4. The coffee cup measures the specific heat and mass of the water during a chemical change.
Thus, the coffee cup calorimeter uses the heat transfer and mass of the water when a substance is added.
To know more about calorimeter, refer to the following link:
https://brainly.com/question/10987564
If 14 moles of Oxygen burn how many moles of water are created? *
2C2H6
+
702
4CO2 + 6 H2O
A) 12 mol H20
B) 3.5 mol H20
C) 3 mol H20
D) 42 mol H20
Answer:
A) 12 mol H2O.
Explanation:
Hello,
In this case, for the given reaction:
[tex]2C_2H_6+7O_2\rightarrow 4CO_2 + 6 H_2O[/tex]
We notice that oxygen is in a 7:6 molar relationship with water, for that reason, the resulting moles of water turn out:
[tex]n_{H_2O}=14molO_2*\frac{6molH_2O}{7molO_2} \\\\n_{H_2O}=12molH_2O[/tex]
Thus, the answer is A) 12 mol H2O.
Best regards.
Please help with my chemistry! PLEASE
Answer:
b.
Explanation:
Americium decays to neptunium 237.
An alpha particle has 2 protons and 2 neutrons, so 4 helium atoms.
241-4=237
Research to find out what Molarity (mol/L) is measuring includes citation. What is the common word used to describe the measure of Molarity in the simulation?
Answer:
Molarity is a unit for expressing the concentration of a solution
Explanation:
Molarity is used to express the concentration of a solution. Also known as molar concentration, molarity is the number of moles of solute (the material dissolved) per liter of solution. It measures the concentration of a solution. The molarity of a solution is calculated by taking the moles of solute and dividing by the liters of solution. Hence, Molarity (M) indicates the number of moles of solute per liter of solution (moles/Liter) and is one of the most common units used to measure the concentration of a solution.
Molarity is commonly expressed as molar. Molar also refers to the unit of concentration called molarity, which is equal to the number of moles per liter of a solution. In chemistry, the term most often refers to molar concentration of a solute in a solution. Molar concentration unit also implies the units mol/L or M.
When humans plant more trees, carbon can begin entering the ____
a- hydrosphere
b- geosphere
c- biosphere
Answer:
biosphere
Explanation:
The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth.
The biosphere refers to the regions of the surface and atmosphere of the earth or another planet occupied by living organisms.
Plants are responsible for taking in carbon in nature. When more trees are planted, carbon is absorbed by plants which is a component of the biosphere. Hence planting more trees means increasing the intake of carbon into the biosphere.
Where is the blood first filtered?
W
X
Y
Z
Answer:
in w
Explanation:
first blood enter renal artery which enter glomerous( where blood is filtrated) and then to Bowman carpusle(take the filtrated blood)
and then to proximal tubular(absorbed salt) and then to loop of hanle (y)(absorb water) and then to distal tubule then to ureter (z) and then to renal vein(x)(to go to urinary bladder)
Wax is a nonpolar substance . In which type of substance is it the most soluble ?
Answer:
nonpolar
Explanation:
Use the phrase "like dissolves like"
- Hope that helps! Please let me know if you need further explanation.
Can matter every be destroyed? Why or why not?
Hey
Matter can neither be created nor destroyed.
Explanation:
This is the law of conservation of matter (mass). One can prove this by performing a simple experiment at home.
Have a great day
What is the concentration of a solution in which 10.0 g of AgNO, is dissolved in 450 mL of solution?
M
Answer:
M=0.15
Explanation:
138 g AgNO -> 1 mol AgNO
10 g AgNO -> x
x= (10 g AgNO * 1 mol AgNO)/138 g x=0.07 mol AgNO
450 mL=0.45 L
M= mol solute/L solution
M= 0.07 mol AgNO/0.45L
M=0.15
Representa gráficamente con una breve descripción de los modelos de Bohr correspondientes a los siguientes elementos representativos: Nitrógeno, Sodio, Calcio, Bromo, Neón
Answer:
Here's what I get
Explanation:
1. Nitrogen
A nitrogen atom has a central positively-charged nucleus surrounded by seven electrons. Two are in the first energy level and the other five are in the second.
2. Sodium
In a sodium atom 11 electrons surround the nucleus in three energy levels in a 2-8-1 order.
3. Calcium
In a calcium atom 20 electrons surround the nucleus. The electron shell configuration is 2-8-8-2.
4. Bromine
The Bohr model of a bromine atom would show 35 electrons surround the nucleus in a is 2-8-8-17 shell configuration.
More modern variations use principal quantum numbers and a 2-8-18-7 arrangement.
5. Neon
A neon atom has 10 electrons surrounding the nucleus in a 2-8 shell configuration.
How do astronomers know about the future collision of Andromeda and the Milky Way?
A) All galaxies will collide at some point
B) The two galaxies have collided previously
C) Astronomers have observed their movements over time
D) The Milky Way has changed course to head toward Andromeda
Answer:
Astronomers have observed their movements over time
Explanation:
Just took the test!!!
The future collision of Andromeda and milky way are known by astronomers because ; ( C ) Astronomers have observed their movements over time
Andromeda also known as messier 31 is a spiral galaxy that appears as a milky blur when viewed from the earth and it is believed to be slightly over 2.5 million years old.
Astronomers predict that based on its movement and the movement of the Milky way there is most likely going to be a collision in future between the Andromeda and milky way.
Hence we can conclude that The future collision of Andromeda and milky way are known by astronomers because Astronomers have observed their movements over time
Learn more : https://brainly.com/question/2849133
do all objects emit electromagnetic waves?
Answer:
no, not all objects emit electromagnet waves.
Explanation: because lets say the object is carpet it has no magnetic waves in it so not all objects do.
If the cost of electricity is 8 cents/kWh, how much will it cost to use the light for a whole year (365 days)?
Answer:
$13.8
Explanation:
Answer:
For a 100 watt bulb it would be around 700.8 USD, (648.53 Euros).
Explanation:
Since you did not specify the wattage of the bulb, this would be it. You could manipulate the wattage, and then do the same to the cost. E.G, a 50 watt bulb would be about 350.4 USD.
Determine the volume occupied by 2.5 mol of a gas at 18 °C if the pressure is 81.8 kPa?
Answer:
74 litre
Explanation:
using ideal gas eqation PV=nRT
here P(pressure)=81.8 kPa =81.8×10^3 Pa
moles=2.5
temperature=273.15+18=291.15K
Gas constant R=8.314m^3-Pa/K-mol
now, V=nRT/P = 8.314×2.5×291.5/81.8×10^3 ≈74litre
✌️;)
What do half-reactions show?
O
A. They show the oxidatign and reduction halves of a reaction.
B. They show only the electrons that are transferred in a reaction.
C. They show the reactant half and the product half of a reaction.
D. They show the ionic equation and the spectator ions of a reaction.
Answer: A. They show the oxidation and reduction halves of a reaction.
Explanation:
Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.
For a redox reaction: [tex]A+B^+\rightarrow A^++B[/tex]
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
oxidation half at anode : [tex]A\rightarrow A^++e^-[/tex]
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
reduction half at cathode: [tex]B^++e^-\rightarrow B[/tex]
Half-reactions show the oxidation and reduction halves of a reaction. The correct answer is option A.
Oxidation is a chemical reaction that involves the loss of electrons by a molecule, atom, or ion. This process results in an increase in the oxidation state of the species undergoing oxidation.
Half-reactions are used to show the oxidation and reduction half of the reaction separately, which makes it easier to balance the overall reaction and to identify the species that are being oxidized and reduced.
In a half-reaction, the species that is being oxidized loses electrons and is called the reducing agent, while the species that is being reduced gains electrons and is called the oxidizing agent. By balancing the number of electrons transferred in each half-reaction, it is possible to balance the overall redox reaction.In conclusion, half-reactions are used to show the oxidation and reduction halves of a redox reaction separately. Option A is the correct answer.
Learn more about oxidation here:
https://brainly.com/question/13182308
#SPJ6
Calculate the pressure using the formula P=1.03+ mass on syringe/area of top of syringe
Answer:1.08
Explanation:
Answer:
1.08kg/cm^2
Explanation:
Edge2021
How many grams of CO2 are produced from the burning of 1.0 mol of amyl alcohol, C5H11OH?
Answer:
220g of CO2
Explanation:
Step 1:
The balanced equation for the reaction.
2C5H11OH + 15O2 —> 10CO2 + 12H2O
Step 2:
Determination of the number of mole of CO2 produced by burning 1 mole of C5H11OH.
From the balanced equation above,
2 moles of C5H11OH produced 10 moles CO2.
Therefore, 1 mole of C5H11OH will produce = (1 x 10)/2 = 5 moles of CO2.
Therefore, 5 moles of CO2 is produced from the reaction.
Step 3:
Conversion of 5 moles of CO2 to grams.
Molar mass of CO2 = 12 + (2x16) = 44g/mol
Number of mole of CO2 = 5 moles
Mass of CO2 =...?
Mass = mole x molar mass
Mass of CO2 = 5 x 44
Mass of CO2 = 220g.
Therefore, 220g of CO2 were obtained from the reaction.
What is the mass of 3.00 moles of carbon
Answer:
36 grams as 1 mole is 12 grams
Answer:
tbh idk cause I will love to answer your question but ehh
