In a study or experiment, the independent variable is what the researcher manipulates and the dependent variable is the response being measured. An example of this would be studying the effect of sunlight (independent variable) on plant growth (dependent variable).
Explanation:In any experiment or study, the independent variable is the factor that the researcher manipulates or chooses intending to cause a change. It's the variable you have control over. The outcome of this change is observed and measured in the dependent variable. The dependent variable responds to the change you made to the independent variable. For example, if you were studying the effect of varying amounts of sunlight on plant growth. The amount of sunlight would be the independent variable (as you are controlling the amount each plant gets), and the plant growth would be the dependent variable (as you measure it after).
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Answer:
first part of the problem: temperture and volume
second part: tempture and volume
hope this helps
Explanation:
What are the spectator ions in this equation?
H+ and OH-
H+ and Ba2+
Upper C r upper O subscript 4 superscript 2 minus. and Upper O upper H superscript minus.
Upper C r upper O subscript 4 superscript 2 minus. and Upper B a superscript 2 plus.
The given question is incomplete. The complete question is :
What is the net ionic equation for the following reaction?
[tex]H_2CrO_4+Ba(OH)_2[/tex]
Answer : The spectator ions are [tex]Ba^{2+}[/tex] and [tex]CrO_4^{2-}[/tex]
Explanation:
Neutralization is a chemical reaction in which an acid and a base reacts to form salt and water.
Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.
The given chemical equation is:
[tex]2H^+(aq)+CrO_4^{2-}(aq)+Ba^{2+}(aq)+2OH^-(aq)\rightarrow Ba^{2+}(aq)++CrO_4^{2-}(aq)+H_2O(l)[/tex]
The ions which are present on both the sides of the equation are barium and chromate ions. and hence are not involved in net ionic equation.
Hence, the net ionic equation is [tex]H^++OH^-\rightarrow H_2O[/tex]
Answer:
D
Explanation:
On edge
Caclulate the pH of a solution with a hydrogen ion concentration of 1X10-7
Answer:
The pH of the solution is 7.00 .
Explanation:
The pH gives us an idea of the acidity or basicity of a solution. More precisely, it indicates the concentration of H30 + ions present in said solution. The pH scale ranges from 0 to 14: from 0 to 7 corresponds to acid solutions, 7 neutral solutions and between 7 and 14 basic solutions. It is calculated as:
pH = -log (H30 +)
pH= -log (1x10^-7)
pH= 7.00
If you have a 550-gram sample of carbon-14 how much remains after 7 half-lives.
Final answer:
After 7 half-lives, approximately 2.15 grams of carbon-14 will remain from the original 550-gram sample.
Explanation:
The question asks how much remains after 7 half-lives of a 550-gram sample of carbon-14. To solve this, we need to understand that each half-life reduces the amount of carbon-14 by half. So after the first half-life, we have 275 grams left, after the second half-life, we have 137.5 grams left, and so on. After 7 half-lives, we will have:
275 grams / 2 = 137.5 grams137.5 grams / 2 = 68.75 grams68.75 grams / 2 = 34.375 grams34.375 grams / 2 = 17.1875 grams17.1875 grams / 2 = 8.59375 grams8.59375 grams / 2 = 4.296875 grams4.296875 grams / 2 = 2.1484375 gramsSo, after 7 half-lives, we will have approximately 2.15 grams of carbon-14 remaining from the original 550-gram sample.
classify each process as exothermic or endothermic.
Evaporation of alcohol from skin: liquid C3H8O+5.2 kJ 》 vaporized C3H8O. Burning of propane ina gas grill: C3H8+5O2 》 3CO2+4H2O+1652 kJ. Oxidation of iron to form rust: 4Fe+3O2》2Fe2O3+2221 kJ.
1. Endothermic reaction
2. Exothermic reaction
3. Exothermic reaction
Explanation:
1. Evaporation of alcohol from the skin, here the heat is absorbed by the alcohol so that it gets evaporated from the skin and it is an endothermic process. As the reaction says that, the energy is added to the system, so it is endothermic.
C₃H₈O + 5.2 kJ → C₃H₈O(g)
2. Burning of propane in a gas grill:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O + 1652 kJ.
Here energy is released or given out which is termed as exothermic reaction.
3. Oxidation of iron to form rust:
4 Fe + 3O₂ → 2 Fe₂O₃ + 2221 kJ.
Here also energy is released along with the products, so it is termed as exothermic reaction.
Whenever energy is absorbed, the reaction is endothermic in contrast if the energy is released then the reaction is exothermic.
Answer:
endothermic
exothermic
exothermic
Explanation:
The volume of a cube that measures 10cm in length, 10 cm in width, and 10 cm in height is 1 L. True of False
Answer: False
Explanation:
1 Cubic centimeter (cm³) = 0.001 liter (L).
Volume of = 10 x 10 x 10 = 1000cm³
To convert cubic centimeters to liters, multiply the cubic centimeter value by 0.001 or divide by 1000.
Answer:
volume of this cube = 1000 cc which is 1 L
so true
how to find final temperature
Answer:
to Calculate the final temperature of the water mixture using the equation T(final) = (m1_T1 + m2_T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water in the first container and T2 is the temperature of the water in the second container.
To find the final temperature, use the reciprocal form of Charles's law to relate the initial and final temperatures and volumes of a gas.
Explanation:In order to find the final temperature, we can use the reciprocal form of Charles's law, which relates the initial and final temperatures and volumes of a gas. The equation is T1/V1 = T2/V2, where T1 and V1 are the initial temperature and volume, and T2 and V2 are the final temperature and volume. By rearranging the equation, we can solve for the final temperature:
T2 = (T1 * V2) / V1
Example: If the initial temperature is 20°C, the initial volume is 2 liters, and the final volume is 3 liters, we can substitute these values into the equation to find the final temperature:
T2 = (20 * 3) / 2 = 30°C
What do acids and bases have in common?
O
A. They are both corrosive and can burn skin.
O
B. They both have pH values lower than 7.
O
C. They are both found in many foods.
O
D. They are both commonly used as cleaners.
Acids and bases have similarities such as being A. corrosive and B. They both have pH values lower than 7.
Explanation:Acids and bases have similarities such as being corrosive, having different pH values, and being found in many foods. Acids and bases have several similarities:
Both acids and bases can be corrosive and cause burns. For example, hydrochloric acid is highly corrosive, and sodium hydroxide, a strong base, is also corrosive.Both acids and bases have pH values that are different from neutral. Acids have pH values lower than 7, while bases have pH values higher than 7.Acids and bases are commonly found in many foods. Examples include citric acid in citrus fruits (acid) and sodium bicarbonate in baking soda (base).Therefore, the correct answer is B. They both have pH values lower than 7.
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Convert the following mass of a compound into moles.
23.5g of NaCl
Answer:
0.402 moles
Explanation:
1 mole NaCl/58.44g Nacl ×23.5g NaCl
grams get cancelled out and you are left with moles
Suppose an atom gains an e-. What will be the overall electrical charge? What if an atom loses one e-?
Which of the following statements is true about cellular respiration?
It converts energy into food.
It breaks down food to release energy.
It turns carbon dioxide into water.
It turns water into carbon dioxide.
Answer:
it breaks down food to release energy
Answer: I believe the answer is B) It breaks down food to release energy!!!!
name the hydrocarbons
Answer:
Hexane
Explanation:
This is a simple Alkane with six cabrons therefore the prefix "Hex-" is applied. Since the molecule has no double bonds it will have the ending "-ane"
Answer:
Hexane
Explanation:
Give a brief definition and example of cognitive dissonance
Answer:Cognitive dissonance refers to a situation involving conflicting attitudes, beliefs or behaviors. ... For example, when people smoke (behavior) and they know that smoking causes cancer (cognition), they are in a state of cognitive dissonance.
Answer:
Cognitive dissonance refers to a situation involving conflicting attitudes, beliefs or behaviors. For example, when people smoke (behavior) and they know that smoking causes cancer (cognition), they are in a state of cognitive dissonance.
Explanation:
Which describes the two cells formed through mitosis?
Answer:
Mitosis forms two daughter cells. The daughter cells will be exactly the same as the parent cell. Skin cells, liver cells, and generally all somatic cells undergo mitosis besides sex cells.
Explanation:
plz brainlest
hope this helps
cutie :)
A solution in which the [H+] is greater than [OH-] is called
Answer: Acidic Solution
Explanation:
An acidic solution is one that has more hydrogen ion (H+) than OH - concentration.
SrCl2 + 2AgNO3 reaction is what
Answer:
SrCl2 + 2AgNO3 ----> Sr(NO3)2 + 2AgCl (solid)
Explanation:
SrCl2 + 2AgNO3 ----> Sr(NO3)2 + 2AgCl (solid)
Imagine that you have a partially inflated tire. If you add approximately two pumps more air into it from your tire pump, what do you expect to change when you compare the starting and ending state of the tire? Check all of the boxes that apply: volume temperature pressure moles of air molecules
Answer:
A C D
on edg 2021
Explanation:
The answers are:
A. volumeC. pressureD. moles of air moleculesIf a sample of hot water and cold water are mixed, energy will flow from the hot water to the cold water. The heat transfer will stop when
the mixture reaches a temperature between the two original temperatures.
True
Or
False
The diagram to the right shows energy for two
reactions, A and B.
Which reaction has the higher Gpx?
Answer:
They are the same
I did the activity
Both reaction have same energy. nergy is always assigned based on its nature once it has been transmitted.
What is energy?Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, electrical, chemical, thermal, electrical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred form one body to other. Energy is always assigned based on its nature once it has been transmitted.
Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy. Even while at rest, a tensioned object like a spring or bow has the ability to move; this is because of its design, which includes potential energy. Both reaction have same energy.
Therefore, both reaction have same energy.
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Which is the equation of a circle with its center at (-4,2) and a radius of 4?
Select one:
a. (x+4)2 + (y-2)2 = 16
b. (x-4)2 + (y+2)2 = 16
c. (x-4)2 + (y+2)2 = 4
d. (x+4)2 + (y-2)2 = 4
The picture above shows the water cycle. In the water cycle, water travels from the land to the sky and back again. Water leaves the ocean through _______ and returns to the ocean through _______.
A.
evaporation; precipitation and run-off
B.
condensation; evaporation
C.
transpiration; precipitation and run-off
D.
run-off; condensation
The picture above shows the water cycle. In the water cycle, water travels from the land to the sky and back again. Water leaves the ocean through Evaporation and returns to the ocean through Precipitation and run-off.
Thank You ☺️ ☺️.
☆ ★ Make It Brainlist Answer Please.....Answer:
A
Explanation:
Brainiest
Remember do it today start now don’t wait
carrying capacity is the maximum population that a given area can support.
am I right???
There will be change in the population of a species everyday. The carrying capacity is the maximum population that a given area can support. Thus the given statement is right.
What is carrying capacity?The carrying capacity is defined as the maximum population, density or biomass that a specific area can support sustainably. This likely changes over time and also depends on many environmental factors, presence of predators, etc.
It is the carrying capacity which denotes the point where the population cannot grow further theoretically and it is not growing any larger. It can be increased by supplying greater amount of food, decreasing predation, raising the amount of habitat, etc.
It can be decreased by increasing predation, decreasing the amount of habitat, etc. A constant K is used to represent the carrying capacity. It is due to this the population is found to be in a stable state.
Thus carrying capacity is the maximum population that a given area can sustain.
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Explain the process of root wedging.
Answer:
Root Wedging is the process in which roots grow into the cracks in rocks and force the cracks open as they continue to grow.
Explanation:
____Zn(s) + ____HCl(aq) → ____ZnCl2(s) + ____H2(g)
Hey there!
Assuming you want us to balance the equation:
Zn + HCl → ZnCl₂ + H₂
Balance Zn.
1 on the left, 1 on the right. Already balanced.
Balance H.
1 on the left, 2 on the right. Add a coefficient of 2 in front of HCl.
Zn + 2HCl → ZnCl₂ + H₂
Balance Cl.
2 on the left, 2 on the right. Already balanced.
Our final balanced equation:
Zn + 2HCl → ZnCl₂ + H₂
Hope this helps!
WEATHER PREDICTIONS FROM
METEOROLOGISTS BASED ON SATELLITE
DATA
O These predictions are likely to be valid and
should be heeded.
These predictions are not likely to be valid
and can be dismissed.
Answer:
These predictions are likely to be valid and should be needed.
Explanation:
Meteorologist made predictions about weather of a particular area on the data they received from the satellite. Meteorology is a branch of science in which we study about the atmosphere. It is mainly used for the forecasting of weather and meteorologists are those people or scientists who study the weather and research on different scales or instruments of weather.
Which type of fault is under compression
Answer:
reverse fault
Explanation:
A reverse fault takes place when two earth's crust pieces are pushed together.The location at which the collision between the two tectonic plates takes place is called a convergent boundary.
A bag of potato chips is sealed in a factory near sea level. The atmospheric pressure at the factory is
0.82 millimeters of mercury (mm Hg). The pressure inside the bag is the same. What is the pressure
inside the bag of potato chips in Pascal's (Pa)?
Answer: The pressure inside the bag of potato chips in Pascal's is 109
Explanation:
Pressure of the gas is defined as the force exerted by the particles on the walls of the container. S.I unit of pressure is pascal.
Thus units of pressure can be mm Hg or atmosphere or bar or Pascal.
Given : Pressure inside the bag is the same as atmospheric pressure at the factory = 0.82 mmHg
Pressure 760 mm Hg = 101325 Pa
0.82 mm Hg = [tex]\frac{101325}{760}\times 0.82=109Pa[/tex]
Thus the pressure inside the bag of potato chips in Pascal's is 109
Final answer:
The pressure inside the bag of potato chips, sealed at 0.82 mm Hg, is equivalent to 109.324 Pascals (Pa) when converted using the factor 1 mm Hg = 133.322 Pa.
Explanation:
The pressure inside a bag of potato chips, if sealed at 0.82 mm Hg near sea level, can be converted to Pascals (Pa). As the conversion factor between mm Hg and Pa is 1 mm Hg = 133.322 Pa, we simply multiply the given pressure in mm Hg by this factor to obtain the pressure in Pascals.
To calculate the pressure in Pascals:
Multiply the pressure in mm Hg by 133.322 Pa/mm Hg.
So, the pressure inside the bag in pascals is:
Pressure in Pa = 0.82 mm Hg × 133.322 Pa/mm Hg
Pressure in Pa = 109.324 Pa
Therefore, the pressure inside the bag of potato chips is 109.324 Pascals (Pa).
What are the reactants and products of esters????:/
Reactants: Carboxylic Acid + Alcohol
Products: Ester + Water
Esters are formed in a chemical reaction called esterification, which typically involves the following reactants and products:
- Reactants:
1. Carboxylic Acid (R-COOH) - an organic compound with a carboxyl group.
2. Alcohol (R'-OH) - an organic compound with a hydroxyl group.
- Products:
1. Ester (R-COO-R') - the organic compound formed from the reaction.
2. Water (H₂O) - a byproduct of the reaction.
This reaction is often catalyzed by an acid, such as sulfuric acid (H₂SO₄).
whose the real dirty dan?
Answer:
Sandy references him in a dream during hibernation as a Texas outlaw, before SpongeBob and Patrick create a game where they would fight over the titles of Pinhead Larry and Dirty Dan. SpongeBob pretends to be him at first, but at the end of the fight, Patrick is titled as Dirty Dan.
Hope it helps you
Plz mark brainliest and follow me ❤❤❤❤❤
Explanation:
Answer:
He isn't real, he's just an imaginative character from one of Sandy's dreams.
Which of the following are part of the Carbon Cycle? A. respiration B. combustion C. photosynthesis D. decomposition E. all of the above
Answer:
E. All of the Above
Explanation:
Because it requires all to create and reuse carbon
Calculate the specific heat capacity of a new alloy if a 15.4 g sample absorbs 297 Joules when it is heated from 5.0 °C to 20.7 °C. The key assumes you are giving your answer in Joules/g°C and rounding to 2 or 3 sig figs
Answer: The specific heat of alloy is [tex]1.23J/g^0C[/tex]
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
[tex]Q=m\times c\times \Delta T[/tex]
Q = Heat absorbed = 297 J
m= mass of substance = 15.4 g
c = specific heat capacity = ?
Initial temperature = [tex]T_i[/tex] = 5.0°C
Final temperature = [tex]T_f[/tex] =20.7°C
Change in temperature ,[tex]\Delta T=T_f-T_i=(20.7-5.0)^0C=15.7^0C[/tex]
Putting in the values, we get:
[tex]297J=15.4g\times c\times 15.7^0C[/tex]
[tex]c=1.23J/g^0C[/tex]
The specific heat of alloy is [tex]1.23J/g^0C[/tex]
The specific heat capacity of the new alloy is approximately 1.22 J/g°C.
Calculating Specific Heat Capacity:
To calculate the specific heat capacity of a new alloy, we use the formula:
q = mcΔTWhere:
q = heat absorbed (297 Joules)m = mass (15.4 g)c = specific heat capacity (J/g°C)ΔT = change in temperature (20.7 °C - 5.0 °C) = 15.7 °CRearranging the formula to solve for c:
[tex]c = \frac{q}{m\Delta T} = \frac{297\ J}{15.4 g \times 15.7 ^\circ C} \approx 1.22 J/g^\circ C[/tex]Therefore, the specific heat capacity of the alloy is approximately 1.22 J/g°C.