Answer:
Write 2 behind the NaCl so it becomes 2NaCl and 2 behind the NaF so it becomes 2NaF. The others take 1 each
Explanation:
The coefficients of the given balanced chemical equation are 2, 1, 2, 1.
What is the balanced chemical equation?A chemical equation can be defined as the representation of a reaction in terms of symbols of the reactants and products. A chemical equation has of reactants contributing to the reaction, formed products.
The equation which contains the number of atoms of substances that is equal on either side of the equation is known as a balanced chemical equation.
The law of conservation of mass has to be followed by a balanced chemical equation. By obeying this law, the total mass of reactants in the chemical reaction should be equal to the total mass of the products in a balanced chemical equation.
The given equation of the reaction of sodium chloride and fluorine is:
[tex]NaCl + F_2 \longrightarrow NaF + Cl_2[/tex]
The balanced chemical equation for the above reaction NaCl ad F₂ is:
[tex]2NaCl + F_2 \longrightarrow 2NaF + Cl_2[/tex]
Therefore the coefficients to balance the given equation are 2, 1, 2, 1.
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How many grams of O2 are needed to produce 0.400 mole Fe2O3 in the following reaction?
4 Fe(s) + 3 028 2 Fe2O3(s)
Answer
7.2 g of Oxygen are needed to produce 0.400 mole Fe₂O₃ in the following reaction
Explanation:
4 Fe(s) + 3O₂= 2 Fe₂O₃(s)
4 moles of Fe reacts with 3 moles of oxygen to give 2 moles of Fe₂O₃
to get the grams of oxygen needed to produce 0.400 mole Fe₂O₃ in the following reaction
we first get the moles then convert it to grams
3 moles of oxygen are needed to give 2 moles of Fe₂O₃ in the equation thus we have 3:2
let the represent the moles of oxygen that will be intended for 0.400 mole Fe₂O₃ in the following reaction
x:0.4
3:2=x:0.4
3/2 = x/0.4
cross multiply
3x0.4 = 2x
1.2 = 2x
x= 1.2/2 = 0.6
moles is 0.6
1 mole of Oxygen is 12g of Oxygen
0.6 mole of oxygen will give = 0.6 x12= 7.2 g of Oxygen
7.2 g of Oxygen are needed to produce 0.400 mole Fe₂O₃ in the following reaction
To produce 0.400 moles of Fe₂O₃, 95.8 g of O₂ are needed.
Let's consider the following balanced equation.
4 Fe(s) + 3 O₂(g) ⇒ 2 Fe₂O₃(s)
We can calculate the grams of O₂ needed to produce 0.400 moles of Fe₂O₃ considering the following relationships.
The molar mass of Fe₂O₃ is 159.69 g/mol.The molar ratio of Fe₂O₃ to O₂ is 2:3.[tex]0.400molFe_2O_3 \times \frac{159.69gFe_2O_3}{1molFe_2O_3} \times \frac{3molO_2}{2molFe_2O_3} = 95.8 gO_2[/tex]
To produce 0.400 moles of Fe₂O₃, 95.8 g of O₂ are needed.
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How many grams of O₂ are needed to produce 0.400 mole Fe₂O₃ in the following reaction?
4 Fe(s) + 3 O₂(g) ⇒ 2 Fe₂O₃(s)
_______________ is when a compound containing carbon and hydrogen (and sometimes oxygen) combines with oxygen gas to produce carbon dioxide and water. *
Fill in the blank:
synthesis
decomposition
combustion
single replacement
double replacement
Answer:
C. Combustion
Explanation:
Combustion- an organic compound containing carbon, hydrogen and sometimes oxygen reacts with oxygen gas to form carbon dioxide and water.
A company uses a substance that is Solid under normal conditions this substance will be used in extreme conditions which could make this substance molecules move faster and cause a phase change how would this phase change occur , and how would the molecules of the substance be affected under these extreme conditions
The shift often happens when heat is applied or removed at a specific temperature, also referred to as the substance's melting or boiling point. The temperature at which a substance transforms from a solid into a liquid is known as the melting point.
What is temperature ?The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances.
When a substance immediately transitions from the solid to gas state, it is said to sublimate. Deposition is the opposite of sublimation, occurring when a substance changes from a gaseous state to a solid state.
For instance, you have undoubtedly seen the simple processes of forming ice, melting ice, and boiling water to cause freezing, melting, and vaporization. Cold beverage containers frequently develop condensation on their exteriors. When this happens, the liquid on the container's surface is created straight from the humid air.
Thus, The temperature at which a substance transforms from a solid into a liquid is known as the melting point.
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I need help ASAP!!!
All organisms are made up of _________, the basic unit of structure and function.
_________ is the ability to do work and allows living things to perform all the functions necessary to live.
Answer:
cells; energy
Explanation:
Answer:
All organisms are made up of cells, the basic unit of structure and function. Homeostasis is the ability to do work and allows living things to perform all the functions necessary to live.
Explanation:
Cells are the building blocks of all life and make up the structure and allow an organism to function properly. Homeostasis defines the second term. Hope this helps, have a great one!
400ml of 2.5M can be deluded to make how many of 2.0 HCI
Answer:
The new volumen of the solution is 500 ml.
Explanation:
A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).
We use the formula for dilutions:
C1 x V1 = C2 x V2
V2= (C1xV1)/C2
V2= (400 ml x 2,5 M)/2,0M
V2= 500 ml
How many calories must be absorbed by 20.0 g of water to increase its temperature from 383.0 C to 303.0 C
Answer:
1600 calories
Explanation:
Data obtained from the question include:
M (mass of water) = 20g
T1 (initial temperature) = 383°C
T2 (final temperature) = 303°C
ΔT (change in temperature) = T1 - T2 = 383 - 303 = 80°C
C (specific heat capacity of water) = 1 calorie/g°C
Q (heat) =?
Using the the equation Q = MCΔT, the heat in calories absorbed by the water can be obtained as follow:
Q = MCΔT
Q = 20 x 1 x 80
Q = 1600 calories
Therefore, the heat absorbed by the water is 1600 calories
How many mol of sodium hydroxide are required to make 1.35 L of 2.50 mL solution?
Final answer:
To make a 1.35 L solution, 0.189 mol of sodium hydroxide (NaOH) is required.
Explanation:
To find the number of moles of sodium hydroxide (NaOH) required to make a 1.35 L solution, we first need to determine the concentration of the solution in mol · dm-3. Given that 3.5 g of NaOH is dissolved in 2.5 dm3 of water, we can calculate the concentration using the formula:
Concentration (mol · dm-3) = moles of solute / volume of solution (dm3)
Concentration = (3.5 g / 39.997 g/mol) / 2.5 dm3 = 0.14 mol · dm-3
Now, to find the number of moles of NaOH required for a 1.35 L solution, we can use the formula:
Moles of solute = concentration · volume (L)
Moles of NaOH = 0.14 mol · dm-3 × 1.35 L = 0.189 mol
How many moles are equal to 5.82 x 10^23 atoms of tungsten (w)
Answer:
0.97 mole
Explanation:
1 mole will give 6.02×10^23 atoms
Xmole of tungsten will give 5.82×10^23 atom of tungsten
X= 5.82×10^23/ 6.02×10^23
X = 0.97 moles of tungsten
Answer:
0.967 moles
Explanation:
number of moles = number of atoms / avogadro's number
We are given;
Number of atoms = 5.82×10^23
Avogadro's number = 6.02×10^23
Therefore, number of moles
= (5.82×10^23)/(6.02×10^23)
=0.967mol
Therefore, 0.967 moles are equal to 5.82×10^23 atoms
Assuming all the substances below have the same mass, which substance
below requires the least energy to raise its temperature by 7°C? Use the table
to help you answer the question.
Substance
Specific Heat
J/(kg )
900
Aluminum
Gold
Water
4.184
Wood
O
A. Gold
O
B. Aluminum
O C. Wood
O
D. Water
Answer:
Gold.
Explanation:
The specific heat is the measure to determine which material needs a lesser amount of energy to rise its temperature. Specific heats are described below:
Aluminium: [tex]903\,\frac{J}{kg\cdot ^{\circ}C}[/tex]
Gold : [tex]129\,\frac{J}{kg\cdot ^{\circ}C}[/tex]
Water: [tex]4184\,\frac{J}{kg\cdot ^{\circ}C}[/tex]
Wood: [tex]1300\,\frac{J}{kg\cdot ^{\circ}C}[/tex]
Gold reports the lowest specific heat and, hence, requires the least energy to raise its temperature 7°C.
Calculate OH- given .010 M h+
Answer:
(OH-)=1x10^-12 M
Explanation:
Both pH and pOH have a relationship to belonging to the same aqueous solution: the expression of the Kwater (ionic product of the water Kw) is used:
(H3O+) x (OH-) = 1x10^-14
(0,010) x (OH-)= 1x10^-14
(OH-)=1x10^-14/(0,010)
(OH-)=1x10^-12 M
Dr. von Waldner conducts research on depression. His hypothesis is that depression results from maladaptive thought patterns. From which perspective is von Waldner working?
a. Humanistic
b. Psychodynamic
c. Cognitive
d. Physiological
Answer: The answer is C
Explanation:
a gas has a volume of 350 cubic centimeters at 740 mmHg. how many cubic centimeters will the gas occupy at a pressure of 900 mmHg if the temperature remains constant?
Answer: 287.8 cm3
Explanation:
Given that:
Initial volume of gas V1 = 350 cm3
Initial pressure of gas P1 = 740 mmHg
New volume V2 = ?
New pressure P2 = 900 mmHg
Since, pressure and volume are involved while temperature is constant, apply the formula for Boyle's law
P1V1 = P2V2
740 mmHg x 350 cm3 = 900mmHg x V2
V2 = (740 mmHg x 350 cm3) /900mmHg
V2 = 259000 mmHg cm3 / 900mmHg
V2 = 287.8 cm3
Thus, the gas will occupy 287.8 cubic centimeters at the new pressure.
How many atoms are in 3.75 mol of calcium?
Answer:
Number of atoms = 22.58×1023
Explanation:
what is the full form of alcl3
Answer:
Aluminum Chloride
Explanation:
Which of the following water solutions would likely have the highest boiling point?
Question 6 options:
1.8 M
0.20 M
0.75 M
1 M
Answer:
1m
Explanation:
PLEASEEEE HELPPPP I BEGG FOR HELPPP PLEASE
________________ are powered by redox reaction.
A) diesel engines B) steam engines C) rocket engines D) gasoline engines
Answer:
I beleive its diesel engines
Explanation:
on a timer!
The chart shows the amount of solute that fully dissolved when added to 500 ml of water.
Which ranks the solutions in order of greatest to least solubility?
X → Y → Z
Y → X → Z
Z → X → Y
Y → Z → X
Answer:
B
Explanation:
Answer:
β the answer is β
Explanation:
How much heat is needed to raise the temperature of 55.0 g sample of water by 65.0 oC.
The specific heat of water is 4.18 J/g oC. (Q = mxcx AT)
PLEASE HELP
Final answer:
To raise the temperature of a 55.0 g sample of water by 65.0°C, 14943 joules of heat energy is required, calculated using the specific heat capacity of water and the formula for heat energy.
Explanation:
The student asks about the quantity of heat energy needed to raise the temperature of a given sample of water. To calculate this, we will use the formula Q = m × c × ΔT, where 'Q' is the heat energy in joules (J), 'm' is the mass of the water in grams (g), 'c' is the specific heat capacity (4.18 J/g°C for water), and 'ΔT' is the change in temperature (°C).
In this scenario, the mass of water is 55.0 g, and we want to heat it by 65.0 °C. Therefore, we calculate the heat energy required as follows:
Q = 55.0 g × 4.18 J/g°C × 65.0 °C
Q = 55.0 × 4.18 × 65.0
Q = 14943 J
So, 14943 joules of heat energy is required to raise the temperature of a 55.0 g sample of water by 65.0°C.
Write the chemical reactions for a weak acid and a strong acid.
The dissociation reaction of weak acid is
[tex]HA_{aq} +H_{2}O_{l} \rightleftharpoons H_{3}O^{+} +A^{-} _{aq}[/tex]
For strong acid dissociation reaction is given by
[tex]HA_{aq} +H_{2} O_{l}\rightarrow H_{3}O^{+}+A^{-} _{aq}[/tex]
What is dissociation reaction?Dissociation is a reaction in which acid release its hydronium ion in water. Dissociation of acid depends on the kind of solvent that are there with acids.
Strong acid dissociates at is fullest, means all the hydronium ions releases from acid so it is irreversible reaction, rate of dissociation of acid is very high. Hydrochloric acid is example of strong acid.
Whereas in case of weak acid, It does not dissociate at its fullest level, its dissociation is poor. The rate of dessociation of acid is very low. Acetic acid is an example of weak acid. Dissociationin weak acid is a reversible process.
Thus dessociation of weak acid is poor while in case of strong acid it is very high.
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A weak acid partially dissociates in water, for example, CH₃COOH forms CH₃COO⁻ and H⁺. A strong acid fully dissociates, like HCl into H⁺ and Cl⁻. HCl is a stronger acid than HF, and in a neutralization reaction, H⁺ reacts with OH⁻ to form water.
Chemical reactions involving acids can be represented by their ionization in water. A weak acid like acetic acid (CH₃COOH ) partially dissociates in water to form CH3COO⁻ and H⁺ ions:
CH₃COOH(aq) + H₂O(l) ↔ CH₃COO⁻(aq) + H⁺(aq)
A strong acid such as hydrochloric acid (HCl) fully dissociates in water to give H⁺ and Cl⁻ ions:
HCl(aq) → H⁺(aq) + Cl⁻(aq)
Answering the specific question on which of the two acids HCl(aq) or HF(aq) is stronger: HCl(aq) is the stronger acid since it completely dissociates in solution, whereas HF(aq) partially dissociates, making it a weak acid.
For the neutralization of a strong acid with a base, the net ionic equation generally represents the reaction between hydrogen ions and hydroxide ions to form water. An example of such a reaction is:
H⁺(aq) + OH⁻(aq) → H₂O(l)
Compare and contrast the burning of wood and the metabolism of glucose in your cells. How are they similar, and how are they different?
Burning of wood is a combustion reaction and the metabolism of glucose in your cells is cellular respiratory reaction.
Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells.
Cellular respiration is the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
Wood as well as many common items that combust are organic (i.e., they are made up of carbon, hydrogen and oxygen). When organic molecules combust the reaction products are carbon dioxide and water (as well as heat)
Similarities:
1. Combustion reaction and metabolism of glucose both require oxygen.
2. Combustion and metabolism of glucose both product carbon dioxide and water
3. Both produces by-products: After cellular respiration and combustion have gotten what they needed from the wood, there will be byproducts from the conversion. In the case of combustion, they are noxious gases like carbon monoxide. In the case of respiration, the sugar molecule is broken into two molecules of pyruvic acid.
4. Catalyst: While breaking apart the bonds to release the stored energy either combustion or sugars for respiration the bonds will not broken by themselves. In each case, a catalyst is required to start the reaction that will break the bonds apart. In the case of combustion, the catalyst is a spark. Wood are flammable, so the spark will ignite the burning, breaking apart the bonds and releasing the energy. For respiration, enzymes are used to break the sugar molecule apart.
Differences
1. Glucose metabolism produces a chemical energy, while combustion produces light and heat energy.
2. Glucose metabolism is an endothermic reaction while combustion is an exothermic reaction (produces heat)
If 6.0g of carbon is heated in air, the mass of the product obtained could be either 22.0g or 14.0g depending on the amount of air present. Show that this verifies the law of multiple proportions.
please explain
Answer:
See the demonstration belowExplanation:
The law of multiple proportions states that, when two elements can react with each other to form two or more different compounds, the weights of one element that react with a fixed weight of the other are in a ratio of small whole numbers.
1. If the mass of product obtained were 22.0g
Then, the mass of the oxygen atoms in the product would be:
22.0g - 6.0g = 16.0gThe ratio of the weight of oxygen to the weight of carbon is 16.0 g to 6.0 g,
16.0g : 6.0g = 8 : 3.2. If the mass of product obtained were 14.0g.
Mass of oxygen = 14.0g - 6.0g = 8.0 gRatio oxgyen to carbon = 8.0g / 6.0g = 4 : 33. Conclusion
Take a fixed amount of carbon equal to 3 grams.
Then, the amount of oxygen for the first compound would be 8 grams and the amount of oxygen for the second compound would be 4 grams.
That means that the ratio is 8 : 4 = 2.
Which is saying that, for the two compounds of carbon and oxygen, the weights of oxygen that reacts with a fixed weight of carbon are in a ratio of small whole numbers, in accordance to the law of multiple proportions.
How many moles are contained in 1.44 x 10^23 molecules of water?
Answer:
There are 0.239 moles of water in 1.44 x 10^23 molecules
Explanation:
We use the Avogadro´s Number, whereby in 1 mole of any substance there are 6, 023x10e23 molecules:
6, 023x10e23 molecules-----1 mol water
1.44 x 10^23 molecules -----x=
x= ( 1.44 x 10^23 molecules x 1 mol water)/6, 023x10e23 molecules
x=0,239 mol water
Mrs. Jacobson is pushing a fridge to the right with a force of 100 N. The force pushing it
to the left is 15 N. What is the net (leftover) force on the fridge?
85 N to the right
85 N to the left
115 N to the right
115 N to the left
Answer:
A
Explanation:
Let's illustrate this; see the attachment.
We see that Mrs. Jacobson is pushing to the right with a force of 100 N and there is another opposite force pushing with a force of 15 N. Since these are in opposite directions, we can say that the force opposite to Mrs. Jacobson is pushing the fridge -15 N to the right (instead of 15 N to the left).
The net force would then be:
100 N + (-15 N) = 85 N to the right
The answer is A.
Answer:
85 N to the right
Explanation:
Convention: rightwards positive
Force applied by Mrs. Jacobson:
+100
Force applied by the fridge:
-15
Net force
+100 - 15
+85
What causes the trade winds?
Answer: Trade winds are caused by the strong warming and evaporation within the atmosphere around the equator. (1) Around the equator, the warm air rises rapidly, carrying a lot of moisture.
Answer:
The Coriolis Effect.
Explanation:
combination with an area of high pressure, causes the prevailing winds—the trade winds—to move from east to west on both sides of the equator across this 60-degree "belt.
Punnett Squares represent the probability of traits in offspring as a result of what type of
reproduction?
A sexual
B asexual
C both
D neither
Answer:
A
Explanation:
B is incorrect because asexual reproduction produces an offspring exactly the same as it's parent. Thus the probability does not need to be calculated.
C and D logically do not make sense since B is incorrect and A is correct. I provided the explanation why it is incorrect above.
Thus A is the correct answer.
_________________________________________________
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What happens to the equilibrium shift when NaOH is added to ammonium?
Answer:
I believe it goes to the left
Explanation:
GOOGLE it or ask me for more questions :)
Select all of the statements that are examples of technology in science. chemists using a computer program to analyze data from their experiments physicists using a water tank to observe the way waves interact with a model vehi biologists writing down observations of animal behavior physicists discussing the results of an experiment geologists using a seismograph to record vibrations moving through the Earth
Answer:
Explanation:
1. geologists using a seismograph to record vibrations moving through the Earth.
2. chemists using a computer program to analyze data from their experiments.
3. physicists using a water tank to observe the way waves interact with a model rehi.
Those three clearly describe the role of technology in science because all those researchers are using those technological equipment's for their scientific research to get an outcome (Result).
Chemists analyzing data, physicists observing wave behavior, and geologists recording seismic activity are all examples of technology being used in science.
Explanation:The statements that are examples of technology in science include:
Chemists using a computer program to analyze data from their experiments: This is an example of technology being used in chemistry to process and interpret experimental data.Physicists using a water tank to observe the way waves interact with a model vehicle: This is an example of technology being used in physics to observe and study wave behavior.Geologists using a seismograph to record vibrations moving through the Earth: This is an example of technology being used in geology to measure and record seismic activity.Learn more about Technology in Science here:https://brainly.com/question/12932006
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According to the map shown, why is geothermal renewable energy resource more often used west of the Mississippi River?
A)
Geothermal energy requires high subsurface temperatures that can found east of the Mississippi River.
B)
Geothermal energy requires lower subsurface temperatures that can found east of the Mississippi River.
C)
Geothermal energy requires high subsurface temperatures that can be found west of the Mississippi River.
D)
Geothermal energy requires lower subsurface temperatures that can be found east of the Mississippi River.
Answer:
C) Geothermal energy requires high subsurface temperatures that can be found west of the Mississippi River.Answer: C) Geothermal energy requires high subsurface temperatures that can be found west of the Mississippi River.
Explanation: i took the usa test prep and got it right!!
Are 3 eggs the same quantity as 3 dozen eggs ?
Answer:
a dozen eggs is 12 eggs. Three dozen is 36 eggs. so no
Explanation:
ehensive Science 3 B -IC
Theo mixes cake batter and places it in the oven at 350°F
for 45 minutes. Explain what type of reaction baking a
cake represents in terms of energy.
Answer:
Endothermic reaction
Explanation:
Baking a bake batter in an oven is a typical endothermic reaction because it absorbs heat to drive a chemical change.
The heat changes that accompanies a chemical reaction can be categorized as either exothermic or endothermic.
Exothermic changes are changes in which heat is liberated to the surrounding. The surrounding becomes hotter at the end of such change. Burning of fuel and wood is one of such example. Endothermic changes are those that absorbs heat from the surrounding. The surrounding become colder at the end of the changes.In baking a cake batter, the oven furnishes it with a high temperature which drives a chemical change there in. This kind of reaction that absorbs energy from the environment is an endothermic reaction.
Answer:
Sample Response: Baking a cake requires heat to be applied to the batter in order for it to cook and chemically change into cake. The energy or heat applied is absorbed by the ingredients, so this represents an endothermic reaction.