Answer:
A. Heat is transferred by energy waves moving through space.Explanation: According to research :
Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible
SPACE WAVES
Explanation:
what is a pattern in nature
Answer:
Patterns in nature are visible regularities of form found in the natural world. These patterns recur in different contexts and can sometimes be modelled mathematically. Natural patterns include symmetries, trees, spirals, meanders, waves, foams, tessellations, cracks and stripes
Explanation:
What happens in nuclear fission?
Answer:
I believe the answer is energy is released when an atom is split apart.
Explanation:
Nuclear fission is when the nucleus of an atom splits into two or more smaller nuclei. I hope I helped, please correct me if I'm wrong!
What type of energy does water gain as it sits in the sun?
A. Electrical energy
B. Mechanical energy
C. Chemical energy
D. Heat energy
Answer:
heat energy
Explanation:
water in the sun begins to get hot
Answer:
D. heat energy
Explanation:
This energy is in the form of heat. Evaporation occurs when the liquid is heated. For example, as the sun warms the water in a puddle, the puddle slowly shrinks. Water appears to be vanishing, but it eventually comes through the air as a fluid called a water vapor.
hope this helped!
how do this question?
Answer :
(a) The name of gas given off in the reaction is hydrogen gas.
(b) When we take the test tube containing zinc and sulfuric acid near a candle or a burner, we hear a pop sound. This shows the presence of hydrogen gas.
(c) The products formed in this reaction are zinc sulfate and hydrogen gas.
(d) When the evolution of hydrogen gas will stop.
(e) The word equation for this reaction is:
Zinc + Sulfuric acid [tex]\rightarrow[/tex] Zinc sulfate +Hydrogen gas
Explanation:
As we know that when an acid reacts with a metal, then a salt and hydrogen gas are formed.
As per question, when sulfuric acid reacts with zinc metal then zinc sulfate and hydrogen gas are formed.
The word equation for this reaction is:
Zinc + Sulfuric acid [tex]\rightarrow[/tex] Zinc sulfate +Hydrogen gas
The balanced chemical reaction is as follows:
[tex]Zn(s)+H_2SO_4(aq)\rightarrow ZnSO_4(aq)+H_2(g)[/tex]
In this reaction, zinc metal displaces the hydrogen form sulfuric acid.
When we take the test tube containing zinc and sulfuric acid near a candle or a burner, we hear a pop sound. This shows the presence of hydrogen gas.
THE BRAINLIEST ANSWER ASAP!! PLEASE HELP ME OR I FAIL!!! Describe some of the rules scientists follow to reflect the uncertainty of measurements and calculations.
What are Earth's four interconnected global systems?
Answer:
Answer D
Explanation:
The Earth's system can be placed into four sub- groupings- : atmosphere, biosphere, lithosphere, and hydrosphere.
Answer:
Ocean, Land, Atmosphere, Life
Explanation:
Solve: When you mix two substances, the heat gained by one substance is equal to the heat lost by the other substance. Suppose you place 143 g of aluminum in a calorimeter with 1,320 g of water. The water changes temperature by 7 °C and the aluminum changes temperature by -70.00 °C.
Water has a known specific heat capacity of 4.184 J/g °C. Use the specific heat equation to find out how much heat energy the water gained (q).
Answer:
38660.16 J
Explanation:
From the question,
Heat gained by water is given as
Q = cm(Δt)..................... Equation 1
Where c = specific heat capacity of water, m = mass of water, Δt = temperature change of water.
Given: c = 4.184 J/g.°C, m = 1320 g, Δt = 7 °C.
Substitute these values into equation 1
Q = 4.184×1320×7
Q = 38660.16 J
Hence the heat energy gained by the water is 38660.16 J
Which statements describe Rutherford’s model of the atom? Select three options.
Answer:
Well, I cannot see the options but if I were you I would choose the one closest to this. Rutherford's model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.
Explanation:
Again I cannot see the options but here is what I would guess. Hope this helped and have a great day! :-)
Answer:
The atom’s positive charge is located in the atom’s nucleus.
The atom is mostly empty space
Electrons orbit around the center of the atom.
Explanation:
100. mL of a gas are obtained from a reaction at 300.⁰C. What volume will the gas occupy at 100.⁰C?
Answer:
The new volume is 65.1 mL.
Explanation:
We have,
Initial volume of the gas is 100 mL
Initial temperature is 300 degrees Celsius
It is required to find the volume the gas will occupy at 100 degrees Celsius. Charles law gives the relation between volume and temperature such that,
[tex]V\propto T[/tex]
So,
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}[/tex]
V₂ is new volume
[tex]V_2=\dfrac{V_1T_2}{T_1}[/tex]
V₁ = 100 mL
T₁ = 300 C = 573.15 K
T₂ = 100 C = 373.15 K
Plugging into formula we get :
[tex]V_2=\dfrac{100\times 373.15}{573.15}\\\\V_2=65.1\ mL[/tex]
So, the new volume is 65.1 mL.
You are given a sample of a colourless liquid. Describe how you would show that it was pure water. FASTEST ANSWER GETS BRAINLIEST
Answer:
By measuring the liquids freezing point, you will be able to know if it's pure water. if the water freezes at 32 Fahrenheit, or 0 celcius, then you know the colourless liquid is water.
Explanation:
Answer: you could drink it
Explanation:
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee question in picture
Answer:
a) Correct: Energy will transfer from cold drink to the ice, causing the drink to get colder
Explanation:
Rey's idea is correct as energy will transfer from cold drink to the ice, causing the drink to get colder.
Energy will transfer from cold drink to ice because energy is always transferred from a body at a higher temperature to a body at lower temperature and that will allow the cold drink to get cool.
So, heat is transferred from the cold drink to the ice causing drink to get colder.
Hence, the correct option is a.
2H2 + O2 + 2H20
If you have 50 grams of hydrogen (H2), how many moles of water (H20) could be
produced?
Answer:
Hello
The answer is 25gr H2O
Explanation:
50grH2×1 molH2/2 gr H2×2mol H2O/2molH2=25gr H2O
the si base units for length and time are
Answer:
The meter, symbol m, is the SI unit of length
The second, symbol s, is the SI unit of time.
m - metre
s- second
The SI base units for length is meter and time is second.
What is SI units?SI unit stands for international system of units.
It is defined as a metric system that is used as a measurement standard expected globally.
There are basically seven SI based quantities
Thus, the SI base units for length is meter and time is second.
To learn more about SI unit, refer to the link below:
https://brainly.com/question/12629581
#SPJ2
HELP!!!!!!!!!!!!!!
What is happening to the universe today?
A.)The universe is the same as it was billions of years ago.
B.)The universe is expanding.
C.)The universe is contracting.
Answer:
The universe is expanding
Explanation:
As long as the amount of stuff doesn't go over a critical threshold, the universe will continue to expand forever, and eventually suffer heat death, freezing out. But if there's too much stuff, the expansion of the universe will slow down and stop. Then the universe will begin to contract.
HOPE IT HELPS :)
PLEASE MARK IT THE BRAINLIEST!
Answer:
The universe is expanding
Explanation:
Its expanding in many ways as in technology, mind, life it self, its all part of a life form in the universe to create more life in earth and other places like the micro organism with the bacteria and the microscopic life form.
Which is the solubility product expression for Na3PO4(s)?
A. [Na] +3(PO4)3-
B. [Na +3] / [PO43-]
C. [Na +] }[PO43-)
D. [Na] +3/[PO4) 3 -
How do the 3 parts of the “evolution recipe” work together to evolve species and increase biodiversity?
Answer:
According to the evolution theory, the organisms that are better adapted have more chances to survive and to reproduce, thereby they also have more chance to perpetuate their own genes in the next generation. This statement can be divided into three properties. First, the adaptation (or adaptive fitness) of one organism is the ability to make use of the available resources in particular environmental conditions. Second, survival is defined as the ability to identify dangerous (environmental) conditions. Finally, reproduction can be defined as the ability to leave descendants (i.e., own offspring). The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.
The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity.
Evolution theory:According to the evolution theory, the organisms that are better adapted have more chances to survive and reproduce, thereby they also have more chances to perpetuate their own genes in the next generation.
First, the adaptation (or adaptive fitness) of one organism is the ability to make use of the available resources in particular environmental conditions. Second, survival is defined as the ability to identify dangerous (environmental) conditions. Finally, reproduction can be defined as the ability to leave descendants (i.e., own offspring).The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.
Find more information about Evolutionary theory here:
brainly.com/question/1056409
If 1.08 g of sodium sulfate reacts with an excess of phosphoric acid, how much sulfuric acid is produced? Show all work. PLEASE HELP ME
Why does chemical safety remain a concern today?
A. Chemists really don't know what to do with dangerous chemicals.
B. Chemists are constantly learning more about what makes
chemicals dangerous.
C. Chemists still have many older, existing chemicals that are
dangerous.
D. Chemists don't think about the safety of the chemicals they use.
Answer: B. Chemists are constantly learning more about what makes chemicals dangerous.
Explanation: The safety of chemicals still remains of utmost importance as chemist haven't relented in their strive and curiousness at knowing the compounds, mixtures and elements which makes chemicals dangerous in other to minimize or mitigate the risk of exposure to this chemicals during usage. Chemicals are things we cannot do without as they constitute a lot to the human race in terms of Energy and health. Due to this immense contribution, the safety of chemicals will remain of great priority to chemists.
How does recycling aluminum cans help the environment?
Answer:
C.
Recycling aluminum cans saves a considerable amount of energy; it also reduces carbon dioxide emissions and the amount of waste headed into landfills. Collecting your cans for recycling is an important step you can take to help the environment.
9. Given the following balanced chemical
equation,
6NaOH + 3Cl2 - NaClO3 + 5NaCl + 3H20
how many moles of NaCl can be formed if 6mol of NaOH were to react?
What is the oxidizing agent in the following equation? Al (s) + 3 Ag+ (aq) produces Al^+3 (aq) + 3 Ag (s)
Answer:
Ag is the oxidizing agent
Explanation:
oxidizing agent in the following equation?
Al (s) + 3 Ag+ (aq) = Al+3 (aq) + 3 Ag (s)
Left side
Al = 1
Ag = 3
Right Side
Al = 1
Ag = 3
So it's balanced already good.
Define
oxidizing agent = An oxidizing agent is the substance that gains electrons and is reduced in a chemical reaction.
Al is the reducing agent.
Ag is the oxidizing agent
NEED HELP ASAP!!!!!!!!!!!!!
A planet orbiting a star can make the star wobble.
True
False
Answer:
Actually, I think that's True.
Good Luck!~
[tex]^{Brazts[/tex]
Answer: It's True
Explanation:
Due to the planets orbiting, the star is affected by the rotation of the large object (a planet) and starts to wobble from side to side because of the weight.
Which of the following might a physicist choose to study?
O A. The effects of fast pitches on wooden baseball bats
O B. The effects of water pollution on tadpoles
O C. The amount of salt in human saliva
O D. The amount of iron in moon rocks
Answer:
The effects of fast pitches on a wooden baseball bats.
What happens if more product is added to a system at equilibrium?
A. More products will form.
B. Concentrations will not change.
C. Only the concentration of that product will increase.
D. More reactants will form.
Answer:
D. more Reactants will form
Explanation:
hope that help.
2. Paraffin and gasoline are both hydrocarbons, and therefore have the same general
chemical formula CnHn+2. As such, paraffin and gasoline are similar in that both do
not contain oxygen. Compare the use of gasoline (which would be similar to
paraffin) versus ethanol as a fuel, considering that gasoline is a hydrocarbon
whereas ethanol also contains oxygen. Compare the use of gasoline versus ethanol
as a fuel, from the standpoint of efficiency, by comparing the amount of energy that
each contains on a per amount of fuel basis.
Answer:
Paraffin combustion produces more energy per gram than ethanol fuel but paraffin fuel has a larger carbon footprint
Explanation:
Paraffin is also known by the standard chemical name alkane with a chemical formula for a paraffin given as follows;
CₙH₂ₙ₊₂
While gasoline, also known as petrol, consists of light weight alkanes and alkenes
The heat of combustion of gasoline is about 47.3 kJ/g
The combustion of gasoline is incomplete as presented in the following equation
[tex]C_x H_y+ O_2 +N_2 \rightarrow CO_2 + H_2O + CO + HC + NO_x[/tex]
Example of complete combustion of octane, however, is given as follows;
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O + Energy
The source of paraffin is from petroleum
Ethanol fuel can be produced by the fermentation of Sugar
The heat of combustion of ethanol = 1366.91 kJ/mol = 29.664 kJ/g.
2CH₃OH + 3O₂ → 2CO₂ + 4H₂O + Energy
what best explains why the box’s final kinetic energy is less than its initial potential energy
Answer:
B.Some potential energy was converted into thermal energy due to friction.
The fact that kinetic energy is not greater than potential energy is due to the fact that during motion, kinetic energy loses some of its energy as a result of heat, friction, and light energy. These losses do not occur with potential energy, which is why potential energy is always greater than kinetic energy.
What is kinetic energy ?The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed alterations.
There is no initial potential energy since the initial velocity is zero. There is no final potential energy since the end height is zero. This indicates that the total kinetic energy and total potential energy are equal. Both parties have the ability to cancel the mass.
Due to the principle of energy conservation, the initial potential energy and the end kinetic energy will be equal just before the object strikes the ground.
Thus, kinetic energy is not greater than potential energy is due to the fact that during motion.
To learn more about kinetic energy, follow the link;
https://brainly.com/question/15764612
#SPJ2
I need help with that question please help me I really need it so much I been struggling and stressing a lot please it is due today at 11:00 so I will mark brainlist
Answer:
5000*C abd 1.5 million atmospheres
Which of the following are formulations of the second law of
thermodynamics?
A. It isn't possible to transfer heat from an object at a lower
temperature to another object at a higher temperature unless
work is done.
B. It isn't possible to change heat completely into work, with no
other change taking place.
C. Entropy of a system decreases over time.
D. All systems can convert energy from one form to another useful
form with 100% efficiency.
Answer:
A and B.
Explanation:
Thermodynamic is the scientific study of heat energy. Its second law states that; the total entropy of an isolated system can never decrease over time, but it is constant if and only if all processes are reversible.
On thermodynamics, one of the German Physicists, Rudolf Clausius, formulated a statement that; heat energy would not suddenly flow from an object at lower temperature to another object at higher temperature.
Also, Lord Kelvin formulated a statement that; It is impossible to change all heat energy completely to work without losing energy.
Thus from these two formulations, options A and B are both correct.
Answer:
A, B, & D
Explanation:
All of these are accurate statements except C because entropy does not decrease over time
PLEASE VERY IMPORTANT NEED THISSSSS!!!!
All of the questions will refer to the unbalanced equation below in the image. Balance it, then answer all of the questions.
1. What is the correct value for coefficient (A)? 1, 2, 3 or 4
2. What is the correct value for coefficient (B)? 1, 2, 3 or 4
3. What is the correct value for coefficient (C)? 1, 2, 3 or 4
4. What is the correct value for coefficient (D)? 1, 2, 3 or 4
5. If there is enough energy and H2, then how many moles of Sn02 will react with 2 miles of H2 and produce 1 mole of Sn and 2 moles of H2O? How many moles of SnO2 does this balanced equation represent? 0.5, 1.0, 1.5 or 2.5
6. The reactants in this equation are _____. SnO2 and Sn, Sn and H2O, SnO2 and H2 OR H2 and H2O
7. The products in this equation are _____. SnO2 and Sn, Sn and H2O, SnO2 and H2 OR H2 and H2O
8. The reaction is ______. Endothermic OR exothermic
Answer:
1. A = 1; 2, B = 2; 3. C = 1; 4. D = 2; 5. 1 mol SnO₂, 1 mol;
6. SnO₂ and H₂; 7. Sn and H₂O; 8. Endothermic,
Explanation:
Often, the best way to start is to balance all atoms other than O and H, then balance O, then balance H.
1. Put a 1 in front of the most complicated-looking formula (SnO₂):
1SnO₂ + H₂ ⟶ Sn + H₂O
2. Balance Sn:
We have fixed 1 Sn on the left. We need only 1 Sn on the right. Put a 1 in front of Sn to fix it.
1SnO₂ + H₂ ⟶ 1Sn + H₂O
3. Balance O:
We have fixed 2 O on the left. We need 2 O on the right. Put a 2 in front of H₂O.
1SnO₂ + H₂ ⟶ 1Sn + 2H₂O
4. Balance H
We have fixed 4H on the right. We need 4H on the left. Put a 4 in froth of H₂.
1SnO₂ + 2H₂ ⟶ 1Sn + 2H₂O
Every formula now has a coefficient. The equation should be balanced.
5. Check that atoms balance:
[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{Sn} & 1 &1\\\text{O} & 2 & 2\\\text{H} & 4 & 4\\\end{array}[/tex]
It checks.
The balanced equation is
SnO₂ + 2H₂ ⟶ Sn + 2H₂O
6. Moles of SnO₂
According to the balanced equation,
1 mol of SnO₂ reacts with 2 mol of H₂.
The balanced equation represents 1 mol of SnO₂.
7. The reactants — on the left of the reaction arrow — are SnO₂ and H₂.
8. The products — on the right of the reaction arrow — are Sn and H₂O.
9. The energy is on the reactant side of the equation, so it is being added to the system.
The reaction is endothermic.
Mr. Holmes is busy making a paper mache volcano that he is sure is going to win the national science fair contest. He only has room in the volcano’s vent to put 100g of baking soda and 100ml of vinegar.
Mr. Holmes has 4 different concentrations of vinegar in his lab. The active ingredient in vinegar is acetic acid C2H4O2. Which concentration would give the most intense eruption in the volcano?
Bottle 1 shows that it has 44g of acetic acid in the 1L bottle.
Bottle 2 shows the vinegar has a molarity of 2M acetic acid
Bottle 3 shows it is 4% acetic acid by mass.
Bottle 4 when measured shows a pH of 7.
Answer:
Bottle 2 shows the vinegar has a molarity of 2M acetic acid
Explanation:
2M of acetic acid has higher concentration of acetic acid as compared to other vinegar. In 2M of acetic acid is equals to 120 gram of acetic acid in 500 ml of water which is quiet higher than other concentration of acetic acid in vinegar which is 4%. So Mr. Holmes has to use 2M of acetic acid which will produced high intense eruption in the volcano and win the national science fair contest.