Help me answer this chemistry question. thank you!
Answer:
A. How much decay happens in each flashlight
Explanation:
In an experiment, the DEPENDENT OR RESPONDING VARIABLE is the variable that responds to changes being made to another variable called Independent variable. It is the variable that is measured by an experimenter.
In this question, an experiment was carried out to research the effect of sunlight on plastic decay. Three plastic flashlights were used for this experiment in which one was placed in a dark closet (control), and the others were placed in light at different times or intervals. However, the variable being measured or assessed is the decay of each flashlight. This means that "HOW MUCH DECAY HAPPENS IN EACH FLASHLIGHT" is the dependent variable.
what is the answer pleassssssse helpppp0ppppppppppppppp
Answer:
3
Explanation:
Solve whoever gets it right first gets brainlest!
How does carbon cycle
Answer:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. ... Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
hopefully that answered your question. brainliest would be appreciated. have a awesome day!
Answer:
evaporation or released from natural eruptions by nature
What new characteristic did John Delton add to the model of the atom BRAINLY WHOEVER GETS IT RIGHT PLEASE IM ON A TIMER
what is a reservoir?
Answer:
a storage space for fluids
Explanation:
Answer:
an area where large amounts of water are stored
Explanation:
Why are many chemical names so complex?
Answer:
cause they like it that way
Explanation:
btw cant tell if this is legit or not
Enter your answer in the provided box.
Calculate the volume (in liters) occupied by 2.35 moles of nitric oxide (NO) at 6.18 atm and 63°C.
L
Answer:
10.5L
Explanation:
The volume in this question can be calculated by using the formula for gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (litres)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the provided information in this question:
P = 6.18 atm
V = ?
n = 2.35 moles
R = 0.0821 Latm/molK
T = 63°C = 63 + 273 = 336K
Using PV = nRT
V = nRT/P
V = 2.35 × 0.0821 × 336/ 6.18
V = 64.83/6.18
V = 10.49
V = 10.5L
__Na3PO4 + __Sr(NO3)2 --> ___Sr3(PO4)2 + __NaNO3
If .0789 moles of Strontium Nitrate are reacted, how many moles of Sodium Phosphate were reacted?
Answer:
0.0526mol
Explanation:
The chemical equation given in this equation is as follows:
Na3PO4 + Sr(NO3)2 → Sr3(PO4)2 + NaNO3
However, this equation is unbalanced as the number of atoms of each element on each side does not correlate. The balanced equation is as follows:
2Na3PO4 + 3Sr(NO3)2 → Sr3(PO4)2 + 6NaNO3
This balanced equation means that:
2 moles of Sodium Phosphate (Na3PO4) is required to react with 3 moles of Strontium Nitrate (Sr(NO3)2)
Hence, if 0.0789 moles of Strontium Nitrate are reacted, then 0.0789 × 2/3
moles of sodium phosphate will also react.
= 0.0789 × 2/3
= 0.1578/3
= 0.0526mol
A walnut stuck to a pin is burned beneath a can containing 100.0 grams of water at 21°C. After the walnut has completely burned, the
water's final temperature is a warmer 28°C. How much heat energy arose from the burning walnut?
2,000 joules
3,000 joules
5,000 joules
O 9,000 joules
Answer:5000 i think
Explanation:
Which of these would you expect to have the highest boiling point?
Pertane: HOC-CH2-CH-CH2-CH)
Neopentane:
H.C-C-CH3
CH3
CH,
CHE
Isopentane:
Cyclopropane
НЕС-СН-СН-СН3
Нас
CHz
a) cyclopropane
b) pentane
c) isopentane
d) neopentane
Answer:
pertane the stronger the force the larger amount of energy needed to break of the connection between the molecules
Given the balanced equation:
2C2H2(g) + 5O2(g) -> 4CO2(g) + 2H2O(l)
How many moles of water are produced after the complete combustion of 2.0 mole of acetlyene, C2H2(g)?
If the pOH of a solution is 13, what is the PH of the solution?
Answer: pH= 1
Explanation: pOH + pH =14
Questions
1. Is the statement true that a gas takes on the shape of the container?
2. What happened to the water when it was poured into the glass? Into the square container?
3. Did the wood have a fixed shape?
4. Of what state of matter is water an example?
5. Of what state of matter is
ice an example?
6. Of what state of matter is steam an example?
This is for a project. Complete in complete sentences. Please. Sorry if this is confusing
Answer:
1. It will take the shape of its container. Particles can move about within a liquid, but they are packed densely enough that volume is maintained. Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume. A gas can be compressed
2. However after pouring the water from one short glass into a tall glass, to be the same amount after being poured into any other container
3. Yes, wood have a fixed shape. Explaination: The reason is that it's solid and solids have a definite volume and shape. ... They have shapes that do not change and volumes that can be measured
4. Water is known to exist in three different states; as a solid, liquid or gas. Clouds, snow, and rain are all made of up of some form of water. A cloud is comprised of tiny water droplets and/or ice crystals, a snowflake is an aggregate of many ice crystals, and rain is just liquid water
5. Solids are sometimes formed when liquids or gases are cooled; ice is an example of a cooled liquid which has become solid. Other examples of solids include wood, metal, and rock at room temperature
6. For example, water commonly exists in three states of matter: solid (ice), liquid (water), and gas (steam)
Explanation:
plzzzzzzzzzzzzzz give brainly
1. It will adopt its container's shape. Within a liquid, particles can move around, yet the volume is maintained because of the liquid's dense packing. Particles in gaseous stuff are arranged so haphazardly that neither their shape nor their volume can be determined.
What is liquid ?The term liquid is defined as substance which is not solid but which flows and can be poured and take a shape of container. water is an example of liquid.
2. However, the same amount of water would be poured into any other container after being transferred from one short glass to a tall glass.
3. The shape of wood is fixed. It's solid, and solids have a distinct volume and shape, which explains why. They have measurements-able volumes and unchanging forms.
4. There are three recognized states of water: solid, liquid, and gas. Snow, rain, and clouds are all composed of water in some way. A snowflake is an accumulation of several ice crystals, a cloud is made up of microscopic water droplets and/or ice crystals, and rain is just liquid water.
5. When liquids or gases are chilled, solids can occasionally form; ice is an example of a cooled liquid that has solidified. At room temperature, solids also include wood, metal, and rock.
6. As an illustration, water typically exists in three states: solid (ice), liquid (water), and gas (steam).
Thus, to learn more about liquid, follow the link;
https://brainly.com/question/20922015
#SPJ2
Overpopulation means to have more tham capacity for a particular area/ habitat.
True
False
The answer is True
Explanation:
Hope this helps
What’s the position of point X?
The last one (16)
This means that the point X is located at on the number line.
Changes of state is an example of a chemical change.
CHANGES
OF STATE
True
False
Which of the following mole ratios is not correct in the reaction below:
N2 + 3 H2 --> 2 NH3
C
mol H2 / 1 mol NH3 3
mol H2 / 1 mol N2 3
mol N2 / 2 mol NH3 1
mol NH3 / 3 mol H2 2
Help I only have 15 minutes left
Answer:
3 mol H2 / 1 mol NH3
Explanation:
Mole ratio depicts or shows the relationship between the number of moles of two substances in a chemical reaction. The following chemical equation is given:
N2 + 3H2 → 2NH3
According to the above chemical equation;
- 1 mole of N2 reacts
- 3 moles of H2 reacts
- 2 moles of NH3 is produced
Hence, this means that according to the options provided in this question, the incorrect one is 3 mol H2 / 1 mol NH3 because 2 moles rather than 1 mol of NH3 is involved.
What plant structure keeps these droplets from entering the plant?
A. cuticle
B. stem
C. root
D. thorn
Please help!
Answer:
A
Explanation:
Two specialized cells called 'guard cells' make up each stoma (stoma is singular for stomata). Plants have many stomata up to 400 per mm2 on their leaf surfaces and they are usually on the lower surface to minimize water loss.
What was the biggest challenge you faced in getting to where you are today and how did you overcome it?
A coil of wire can become a temporary magnet if connected to a battery.
(true of false question btw)
Methane is the major component of natural gas. The standard molar enthalpy of formation of methane CH4 is -74.9 kJ/mol. For the balanced reaction equation of methane use:
CH4 + 2O2 --> CO2 + 2H2O.
All the chemicals in this reaction are gases. What is the enthalpy change of this reaction in kJ/mol?
Answer:
[tex]\Delta _rH=-802.2kJ/mol[/tex]
Explanation:
Hello!
In this case, according to the given chemical reaction, it is possible to calculate the enthalpy change of the reaction via:
[tex]\Delta _rH=\Delta _fH_{CO_2}+2\Delta _fH_{H_2O}-\Delta _fH_{CH_4}[/tex]
Since the enthalpy of formation of oxygen is 0. Thus, given the enthalpies of formation of gaseous carbon dioxide and water, we obtain:
[tex]\Delta _rH=(-393.5kJ/mol)+2(-241.8kJ/mol)-(-74.9kJ/mol)\\\\\Delta _rH=-802.2kJ/mol[/tex]
Best regards!
The number of sodium ions in one mole of sodium sulphate is
Answer:
2.... is the answer..
Hope it helps!!!
Answer:
2 is the answer
Explanation:
Am correct
Explain how to use the displacement method to find the volume of an irregularly shaped object.
Answer:
Subtract the volume of the water alone from the volume of the water plus the object. For instance, if "b" was 50 milliliters and "a" was 25 milliliters, the volume of the irregularly shaped object would be 25 milliliters.
Explanation:
Hope it helps
Which of the following mole ratios is not correct in the reaction below:
N2 + 3 H2 --> 2 NH3
A) mol H2 / 1 mol NH3 3
B) mol H2 / 1 mol N2 3
C) mol N2 / 2 mol NH3 1
D) mol NH3 / 3 mol H2 2
Help
Answer:
A). 3 mol H2 / 1 mol NH3
Explanation:
Mole ratio showcases how two substances involved in a chemical reaction relates in terms of number of moles (mol). The following chemical equation is given:
N2 + 3H2 → 2NH3
According to the above chemical equation;
- 1 mole of N2 is involved
- 3 moles of H2 is involved
- 2 moles of NH3 is involved
Hence, this means that according to the options provided in this question, the incorrect one is 3 mol H2 / 1 mol NH3 because 2 moles rather than 1 mol of NH3 is involved.
How many liters of carbon dioxide gas is produced from 7.98x10^24 molecules of C4H10 (2C4H10 + 13O2 → 8CO2 + 10H2O)?
can anyone answer this please?
Solve this problems using the equation: C = λ x ν........ A microwave oven emits radiation at a wavelength of 5.00 x 10e-5 m. What is the frequency of this radiation?
Answer:
c = λ x ν
v =c/λ=(3*10e8)/(5.00 x 10e-5)=6000000000000
f = v/λ =6000000000000/5.00 x 10e-5=120000000
Explanation:
A device which make work easy it call
Calculate the amount in moles in 29,200 grams of sodium.
Explanation:
moles = given mass/ molar mass
given mass= 29,200g
molar mass of sodium= 23
therfore, moles= 29200/23
= 1269.5moles