Answer for this question is 45,000
Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.
Explain about the energy?Energy is the ability to do tasks. It can exist in various forms, including potential, kinetic, thermal, electrical, chemical, and nuclear.
Energy can take on a variety of shapes. Examples of these include: electrical energy, sound energy, chemical energy, nuclear or atomic energy, light energy, heat energy, mechanical energy, gravitational energy, and so on. Each form has the ability to shift or transform into the others.
The sun is one of the most significant energy sources. Most of the energy on earth comes from the sun, which is where it all began. We get
Answer for this question is 45,000
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how to prepare hydrogen gas
Name the following bases.
Fe(OH)3
- iron(III) hydroxide
- iron(II) hydroxide
- iron hydroxide
Answer:
1
Explanation:
Ferric Hydroxide
3. 1
Fe. (OH)
Fe(OH)3
Answer:
iron(III) hydroxide
Explanation:
I just took the quiz!
While studying bacterial cells, scientists measure the lengths of the cells in one colony. The chart shows their data. The scientists notice that one measurement stands out. How should the scientists best deal with this measurement?
Answer:
The scientists should best deal with this measurement by stating that there was an error during measuring and collect further data.
Please hurry!!!!!!!!!!
Due tomorrow
Which pair of properties describes the elements in Group 18?
F They are chemically stable and liquid at room temperature.
G They have eight valence electrons and are flammable
H They are magnetic and boil at low temperatures.
J They are gaseous at room temperature and chemically stable.
Answer:
G
Explanation:
They have eight valence electrons and are flammable
*not sure about this answer
Explanation:
the correct answer is C
hope it helps you
A galaxy that has an undefined shape is best classified as a(n)
galaxy.
Answer:
irregular galaxy
pls give brainliest :)
Answer:
irregular galaxy
it is undefined shape
molecular formula of ammonium nitrite using cris method
Answer:
By using the criss cross method,the -1 charge of nitrate ion is shifted to ammonium ion and +1 charge of ammonium ion is shifted to nitrate ion. In this way, the final formula NH4NO3 is formed for the ammonium nitrate.
Drawing a conclusion derived from knowledge of an established principle is called deductive reasoning.
True
False
Answer:
the answer would be true
Answer:
false
Explanation:
cos the principle is established or known so it will not be a deductive or low reasoning
Question:
Nearly the entire world uses the metric system for their measurements. The US is one in of three countries that does not use metric. Would you support changing school curriculum to teach the metric system as the primary measurement system in the US? Why or why not.
(It must be 3-5 sentences long please)
Answer:
I would
Explanation:
I would support the change to the metric system only because it allows children to understand smaller forms of units and measurements. Also, it will allow people in the math and science fields to broaden their knowledge of equations and formulas. Meaning that the scientist and mathematicians will be able to solve more problems in the world right now. Overall, the education system for the children of the United States would benefit from the change in the measurement system.
Plz Help I have One more time To retake and I can't fail it..
[tex]option(a)[/tex]
Explanation:
You answer is correct as you move from left to right across a period. But, the question is asked regarding to the right to left across a period. So, as you move from right to left across a period, you can find firstly Non-metals, secondly Metalloids, and lastly Metals.
Seeds are organs within the reproductive system of plants. How is the spreading of seeds important to the survival of an organism?
A. An organism must reproduce in order to find a suitable place to live.
B. Although a single organism can survive without reproducing, organisms must reproduce in order to ensure the survival of the species.
C. Although a single organism can survive without reproducing, the organism must spread its seeds in order to protect itself from disease.
D. An organism must reproduce in order to absorb nutrients from the environment. SUBMIT
Answer:
Although a single organism can survive without reproducing, organisms must reproduce in order to ensure the survival of the species.
Write the formula for each compound
a. Chromium(III) sulfite
b. Magnesium hypochlorite
c. Nickel(II) nitrate hexahydrate
Answer:
Chromium(III) Sulfite Cr2(SO3)3 Molecular Weight
Mg(ClO)2 - PubChem
Ni(NO3)2
Catalysts help reactions happen more easily. This graph shows the energy of
a reaction without a catalyst. Which graph shows the energy of the same
reaction with a catalyst?
Answer:
D.
Explanation:
Catalysts are substances that increase the rate of a reaction i.e. make it faster. Catalysts do this by reducing the activation energy needed for a reaction to occur.
According to the image in this question, a graph showing the energy of a reaction without a catalyst is displayed. This means that a longer time will be spent. However, with a catalyst, the activation energy will reduce as seen in the image in option D.
The characteristics of a certain gas are listed in the table.
What is the expected density of the above sample of gas?
A - 3.16 g/L
B - 1.58 g/L
C - 1.21 g/L
D - 1.03 g/L
Answer:
Option A. 3.16 g/L
Explanation:
We'll begin by calculating the molar mass of Cl₂. This can be obtained as follow:
Molar mass of Cl₂ = 2 × 35.45
= 70.9 g/mol
Finally, we shall determine the density of Cl₂. This can be obtained as follow:
Molar mass of of Cl₂ (M) = 70.9 g/mol
Pressure (P) = stp = 1 atm
Temperature (T) = stp = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Density (D) =?
D = PM / RT
D = (1 × 70.9) / (0.0821 × 273)
D = 70.9 / 22.4133
D = 3.16 g/L
Thus, the density of the gas is 3.16 g/L.
“during times of personal crisis we may feel the need to engage the services of a therapist to help us with out problems”
fact or opinion and why
Answer:
That is a fact.
Explanation:
A therapist can help support you going forward and when in a personal crisis.
A therapist can help us mentally during a personal crisis. This is a fact. because there are personal therapist who helps us to recover from negative thoughts and mental illness.
What is psychotherapy?Individual psychotherapy is the use of psychological techniques to address emotional and personality issues or disorders. In other words, there are treatments that assist in treating emotional disorders in a manner similar to how a doctor would treat a fever or cold.
Milder emotional conflicts to serious psychopathologies might all be a part of these issues. As a result, both those who are depressed and those who are having marital problems can seek counselling.
The problems that can be healed through psychotherapy include difficulties coping with stressors , trauma and related experiences, mental illnesses such as depression, anxiety an so on.
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(07.01 MC)
A potential energy diagram is shown.
70
60
Products
50
40
Potential Energy (kJ)
30
Reactants
20
10
0
Reaction Pathway
What is the activation energy of this reaction? (5 points)
Answer:
the activation energy is 65-30
35
The activation energy of this reaction is 35 kJ.
What is activation energy?Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
The activation energy is equal to the difference between the threshold energy needed for the reaction and the average kinetic energy of all the reacting molecules.
The activation energy of a reaction is the difference in energy between the threshold energy and energy of the reactants.
Given,
The highest energy for a reaction to happen = Threshold energy = 65 kJ
Energy of the reactants = 30 kJ
Therefore, The activation energy of this reaction is 35 kJ.
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Balance the following equations by inserting the proper coefficients.
CH4 +
O2 CO2 +
H2O
CaCl2 +
AgNO3 Ca(NO3)2 +
AgCl
C2H6O +
O2
CO2 +
H2O
Answer:
2, 2, 2, 2, 3, 2, 3
Explanation:
The coefficient of the equation (i) CH₄ + O₂ → CO₂ + H₂O are 2, 2 the coefficient of equation (ii) CaCl₂ + AgNO₃ → Ca(NO₃)₂ + AgCl are 2, 2 and the coefficient of equation (iii) C₂H₆O + O₂ → CO₂ + H₂O are 3, 2, 3.
What is Balanced Chemical Equation ?
The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Here the given equations are
(i) CH₄ + O₂ → CO₂ + H₂O
(ii) CaCl₂ + AgNO₃ → Ca(NO₃)₂ + AgCl
(iii) C₂H₆O + O₂ → CO₂ + H₂O
Now balance the equation (i)
CH₄ + O₂ → CO₂ + H₂O
Reactant side Product Side
C = 1 C = 1
H = 4 H = 2
O = 2 O = 3
In the reactant side there are 4 H atoms and in product side there are 2 H atoms are present. So multiply by 2 in the product side to balance the H atoms.
CH₄ + O₂ → CO₂ + 2H₂O
Reactant side Product Side
C = 1 C = 1
H = 4 H = 4
O = 2 O = 4
In the reactant side there are 2 O atoms and in product side there are 4 H atoms are present. So multiply by 2 in the reactant side to balance the O atoms.
CH₄ + 2O₂ → CO₂ + 2H₂O
Reactant side Product Side
C = 1 C = 1
H = 4 H = 4
O = 4 O = 4
Here we can see that the equation is balanced. The coefficient are 2, 2.
Now balance the equation (ii)
CaCl₂ + AgNO₃ → Ca(NO₃)₂ + AgCl
Reactant side Product Side
Ca = 1 Ca = 1
Cl = 2 Cl = 1
Ag = 1 Ag = 1
N = 1 N = 2
O = 3 O = 6
In the reactant side there are 2 Cl atoms and in product side there is 1 Cl atom is present. So multiply by 2 in the product side to balance the Cl atoms.
CaCl₂ + AgNO₃ → Ca(NO₃)₂ + 2AgCl
Reactant side Product Side
Ca = 1 Ca = 1
Cl = 2 Cl = 2
Ag = 1 Ag = 2
N = 1 N = 2
O = 3 O = 6
In the reactant side there is 1 Ag atom and in product side there are 2 Ag atoms are present. So multiply by 2 in the reactant side to balance the Ag atoms.
CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl
Reactant side Product Side
Ca = 1 Ca = 1
Cl = 2 Cl = 2
Ag = 2 Ag = 2
N = 2 N = 2
O = 6 O = 6
Here we can see that the equation is balanced. The coefficient are 2, 2.
Now balance the equation (iii)
C₂H₆O + O₂ → CO₂ + H₂O
Reactant side Product Side
C = 2 C = 1
H = 6 H = 2
O = 3 O = 3
In the reactant side there are 2 C atoms and in product side there is 1 C atom is present. So multiply by 2 in the product side to balance the C atoms.
C₂H₆O + O₂ → 2CO₂ + H₂O
Reactant side Product Side
C = 2 C = 2
H = 6 H = 2
O = 3 O = 5
In the reactant side there are 6 H atoms and in product side there are 2 H atoms are present. So multiply by 3 in the product side to balance the H atoms.
C₂H₆O + O₂ → 2CO₂ + 3H₂O
Reactant side Product Side
C = 2 C = 2
H = 6 H = 6
O = 3 O = 7
In the reactant side there are 3 O atoms and in product side there are 7 H atoms are present. So multiply by 3 in the reactant side to balance the O atoms.
C₂H₆O + 3O₂ → 2CO₂ + 3H₂O
Reactant side Product Side
C = 2 C = 2
H = 6 H = 6
O = 7 O = 7
Here we can see that the equation is balanced. The coefficient are 3, 2, 3.
Thus, we can say that the coefficient of the equation (i) CH₄ + O₂ → CO₂ + H₂O are 2, 2 the coefficient of (ii) CaCl₂ + AgNO₃ → Ca(NO₃)₂ + AgCl are 2, 2 and the coefficient of equation (iii) C₂H₆O + O₂ → CO₂ + H₂O are 3, 2, 3.
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How does peer review affect research?
A. Experimental results will be trusted by the scientific community
only if they have been peer-reviewed.
B. Experimental results will be published only before they have been
peer-reviewed.
C. An experiment will not be repeated by others if it has been peer-
reviewed.
O D. Experimental results are possible only if they have been peer-
reviewed.
Answer:
A: Experimental results will be trusted by the scientific community
only if they have been peer-reviewed.
Explanation:
It is NOT C as I have tried it, it did not work and makes no sense.
What effect does the electrostatic force have?
- Particles without charge repel each other.
- Particles of different masses repel each other.
- Particles of opposite charge repel each other.
- Particles of the same charge repel each other. (ANSWER)
D
Explanation:
Particles of the same charge repel each other
Which statement is true about matter?
a: all matter has volume
b: all matter has mass
c: both A and B.
d: all mater has either volume or mass but not both
Answer:
C
Explanation:
This is because matter is anything that has mass and occupies space.Therefore the space occupied by matter is volume
The graph shows the change in concentration of one of the species in the reaction
A + B + C→D.
If the graph indicates the reaction rate, then the concentration of which species is plotted?
A
B
C
D
Answer:
its D
Explanation:
Took the test
The specie whose concentration is plotted is D. The rate of reaction is how quickly or slowly hat a reaction proceeds.
Rate of reactionThe term rate of reaction refers to how quickly or slowly hat a reaction proceeds. A reaction rate plot involves the concentration of the species plotted against time.
Now we can see from the plot that concentration is increasing with time. Since the concentration of products increases with time, then the specie whose concentration is plotted is D.
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HELP ME ASAPPPP PLZZZZZ!!!!!
For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 16.8 moles of methane, CH4 ?
What is the atomic mass of sulfur (S)?
Answer:
atomic mass of sulfur is 32.06 g/mol
Explanation:
Find the number of moles of sodium hydroxide in 25cm3 solution of concentration 0,1 mol/dm3
Answer:
0.0025 moles
Explanation:
25cm^3 = 25/1000 dm^3
Conc = mol/dm^3
Mol = conc * dm^3
Mol = 0.1 * 25/1000
hii pls help me to balance chemical equations
ammonia + oxygen ------> nitrogen + water
Answer:
Explanation:
Ammonia = NH3
Oxygen = O2
When these two (2) chemical elements react together, they form two chemical compound which are nitrogen oxide and water.
NH3 + O2 -----> NO + H2O
We would balance the chemical equation like this;
NH3 + 3O2 -----> 4NO + 2H2O
please help I will mark as brainliest!!and explain.
what mass of copper(ii) oxide would react completely with 500cm3 of a 0.5M dilute sulphuric acid.
The reaction that will take place is:
CuO + H₂SO₄ → CuSO₄ + H₂O (balanced)
Amount of Sulphuric acid provided:
we have 500 mL of a 0.5 molar solution of Sulphuric acid (1 cm³ = 1mL)
We know that molarity is found with the formula:
Molarity = Number of Moles / Volume (in L)
let's plug the given values
0.5 = Number of moles / 0.5 L
Number of moles = 0.25 moles [multiplying both sides by 0.5]
Amount of CuO reacted:
from the balanced equation, we know that CuO reacts with H₂SO₄ in a 1:1 ratio (1 mole of CuO reacts with 1 mole of H₂SO₄)
so 0.25 moles of H₂SO₄ (present in the solution) will react with 0.25 moles of CuO
Mass of 0.25 moles of CuO:
molar mass of CuO = 80 grams/mol (approx.)
we are aware of the relation:
Number of moles = Given mass / Molar mass
plugging the values we have:
0.25 = Mass / 80
Mass = 20 grams [multiplying both sides by 80]
Hence 20 grams of CuO will react
What makes a strong acid different from a weak acid?
Answer:
D. A strong acid dissociates more completely than a weak acid.
Explanation:
A P E X
If the velocity of a body is decreased to 1/2, then K.E. of the body decreases to
Answer:
1/4th
Explanation:
KE = .5mv^2
So when we decrease the velocity by half, we end up losing three fourths of net energy due to that value being squared.
Answer:
The Kinetic Energy is reduced to 1/4 of the original K. E.
Explanation:
K. E. = 1/2 m v^2
If v becomes v/2 we have:
K E. = 1/2 m (v/2)^2
= 1/2 m v^2/4
So dividing the 2:
we get 1/2 m v^2/4 / 1/2 m v^2
= v^2/4 / v^2
= v^2 / 4v^2
= 1/4.
What is one way to prevent soil erosion?
A. Plant trees
B. Plow fields
C. Spray weed killer.
D. Remove mulch.
its a plant trees
(need character limit)
A sample taken from a layer of mica In a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. How much potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years? A. 4.20 g B. 8.40 g C. 12.6 g D. 16.8 g the E. 25.2 g
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HERE IS UR ANSWER
_____________________
option b) is correct answer.
why is it important of having regular supervision of the market?
