A student prepared an Earth/Moon model in which the two spheres were 100 m apart. What were the diameters of the spheres?
Answer:
D₁ = 3.31 m
D₂ = 0.9 m
Explanation:
First, we will find the scaling factor of the model:
[tex]Scaling\ Factor = S.F = \frac{Distance\ between\ Earth\ and\ moon\ in\ Model}{Distance\ between\ Earth\ and\ moon\ in\ Actual}\\S.F = \frac{100\ m}{384400000\ m}\\[/tex]
S.F = 2.6 x 10⁻⁷
Now, the diameter of 1st sphere, that is Earth will be:
[tex]D_{1} = (S.F)(Actual\ Diameter\ of\ Earth)\\D_{1} = (2.6\ x 10^{-7}\ m)(12742000\ m)\\[/tex]
D₁ = 3.31 m
Now, the diameter of 2nd sphere, that is Moon will be:
[tex]D_{2} = (S.F)(Actual\ Diameter\ of\ Moon)\\D_{2} = (2.6\ x 10^{-7}\ m)(3474200\ m)\\[/tex]
D₂ = 0.9 m
Which action is not an example of work?
A. pushing a box across the floor
B. picking up a box off the floor
C. holding a tray in the Cafeteria line
D. raising a barbell over your head
C. picking a tray in the cafeteria line
sound travels 1,500 m/s through water at 25 degrees celciesunder these conditions how long would it take to travel 300m
Answer:
[tex]v = s \div t[/tex]
[tex]t = s \div v[/tex]
[tex]t = 300 \div 1500 = 0.2s[/tex]
What is the vapor pressure of CH3COOH and 90*C?
Answer:
40.kPa hope this helps....
PLEASE!!!
Calculate the mass of 6.022×10236.022×1023 molecule of NH4cl
Answer:
53.5gram.
Explanation
Explanation: number of moles = number of molecule ÷ avogadro's number. => moles = 6.022 × 10²³ ÷ 6.022 × 10²³ = 1 mole. mass of 1 mole of NH4Cl = 1 × molar mass.
What is the meaning of ground state energy?
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metal and one atom of a group
The following Lewis representation depicts a reaction between one atom of a group
nonmetal
eg
X.
+
x*
+
In this representation, each
atom loses
electron(s) and each
atom gains
electron(s)
Teg
The bonds that form in the product would be
Explanation:
X = Group 1 metal
Y = Group 7 Non metal
The dots basically signifies the group.
Metal loses electrons and non metal gains electron. The valency of X is 1 and that of Y is 7.
X atom loses one electron and Y atom gains one electron.
The bond that forms between a metal and a non metal is an ionic bond.
9. Which of the following is needed as a reactant for cellular
respiration?
A. Carbon dioxide
B. Oxygen
C. Water
D. Chlorophyll
oxygen is needed as a reactant for cellular respiration
What is cellular respiration ?
Cellular respiration can be defined as the process which occurs in every cells mainly mitochondria of plants and animals, it involve in the break down of sugars in the presence of oxygen and releases energy in the form of ATP.
The waste product of this process are carbon dioxide and water during exhalation process done by lungs, breathing and cellular respiration are related to each other.
At every step of cellular respiration energy is used in the form of ATP and carry out the normal function. It can aerobic and anaerobic respiration on the basis of use of oxygen.
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Substance in which state of matter have most space between particles
Answer:
to answer your question "which state of matter have most space between particles"
gas is your best answer
Explanation:
when in gas form..particles gain energy and move further apart
for solids particles are fixed (stays in one spot) and vibrates and for liquids particles gain energy but doesn't have enough space to move around freely..so gas is you best answer
Suppose you are titrating an acid solution with a base solution of known concentration. To calculate the concentration of the acid solution, use three steps.
1. Use the____of base____the endpoint and the known concentration of the base solution to find the_____of base used.
2. Use the_____to find the moles of acid from the moles of base.
3. Divide the moles of acid by the volume of_____the titration to find the concentration of acid.
Answer:
To calculate the concentration of the acid solution, use three steps.
1. Use the volume of base used at the endpoint and the known concentration of the base solution to find the moles of base used.
2. Use the stoichiometry to find the moles of acid from the moles of base.
3. Divide the moles of acid by the volume of acid used in the titration to find the concentration of acid.
Explanation:
Titration is the process used in volumetric analysis to determine the amount of a substance present in a given sample.
In any titration, a solution of known concentration known as the standard solution is used to react with a solution of of unknown concentration. The reacting volumes of the solutions are then used to calculate the unknown concentration of the second solution.
In acid-base neutralization reactions, an equivalence point/endpoint of the neutralization titration is obtained and is the point at which the moles of H+ is equal to the moles of OH- . An indicator is used to indicate the equivalence point during a titration by a color change observed in the indicator.
In order to calculate the concentration of an acid, we need to know accurately, use three steps:
1. Use the volume of base used at the endpoint and the known concentration of the base solution to find the moles of base used.
2. Use the stoichiometry of the reaction to find the moles of acid from the moles of base.
3. Divide the moles of acid by the volume of acid used in the titration to find the concentration of acid.
In order to calculate the concentration of a base, use three steps:
1. Use the volume of acid used at the endpoint and the known concentration of the acid solution to find the moles of acids used.
2. Use the stoichiometry of the reaction to find the moles of base from the moles of acid.
3. Divide the moles of base by the volume of base used in the titration to find the concentration of base.
The effective molar mass of ashes has units of grams of ashes per mole of base provided. The mass of the ashes in the experiment is given, 20.4 g. The rest of the work involves determining the amount of base provided, in moles. We will first determine the moles of base used in the titration. What volume of acid was used in the experiment
Answer:
molar mass of unknown monoprotic acid = 114.1 g / mole.
Explanation:
Note: This question is incomplete and lacks necessary data to solve for the required calculation. However, I have similar question on the internet and seen the question completely and will be using that data to solve for this question in order to solve required calculation. Besides that, complete question asks us to solve for molar mass of the acid used.
Note: I have attached the screenshot of the complete question, please have a look on it in the attachment below.
Calculation:
Volume = 34.81mL
34.81 mL of 0.4346 M potassium hydroxide
= 0.03481 L * 0.4346 mole / L
= 0.01513 mole.
Balance equation:
HA + KOH ----> KA + H2O
As we know from the question,
one mole HA neutralize with 1 mole KOH.
mole of unknown monoprotic acid = 0.01513 mole.
And we know that the formula for mole is:
mole = mass / molar mass
Making molar mass as the subject:
Molar mass = mass / mole
Molar mass = 1.726 g / 0.01513 mole
Molar mass = 114.1 g / mole.
So,
Molar mass of unknown monoprotic acid = 114.1 g / mole.
Sound waves cannot pass through one another.
A. True
B. False
4. If you had.35 grams of chloric acid, how many molecules would you have?
Answer:
.4 moles
Explanation:
this is if it's 35 grams
What occurs in combustion reaction? Explain
Answer:
In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn. ... The products of combustion reactions are compounds of oxygen, called oxides.
What type of cloud produces severe weather like thunderstorms, thunder
and lighting, occasional hail, and possibly tornadoes?
Answer:
The cumulonimbus cloud
Explanation:
The cumulonimbus cloud, or thunderstorm, is a convective cloud or cloud system that produces rainfall and lightning. It often produces large hail, severe wind gusts, tornadoes, and heavy rainfall.
pls mark brainliest
Answer:
cumulonimbus clouds
Explanation:
that's the answer.
What process is represented by the letter on the diagram?
A: ____________________________________________
B: ____________________________________________
C: ____________________________________________
D: ____________________________________________
E: ____________________________________________
Explanation:
I don't really understand the question
anyone here know about the law of assumption?
Answer:
uhhh not really i don't even know what that is LOL
When a substance is a solid it has
A. Potential energy
B. Kinetic energy
C. Gravitational energy
D. Chemical energy
Answer:
potential energy
Explanation:
STEP 5: LEAD
Tare the balance. Put calorimeter (no lid) on the balance.
Measure the mass to the nearest 0.01 g.
12.34 g
Use a graduated cylinder to add approximately 40 mL of
water to the calorimeter. Measure the mass of the
calorimeter (no lid) and water to the nearest 0.01 g.
51.99 g
Subtract to find the mass of the water. 39.65 g
Answer:
the answers are in the pic
Explanation:
Answer:
12.36, 52.49, 40.13
Explanation:
Step 5 for the copper one
In order to predict the outcome of the reaction, write the molecular, full ionic, and net ionic equations for a mixture of aqueous ammonia (NH3) and silver nitrate (AgNO3) in which a diammonia silver complex ion is produced. Molecular: Full ionic: Net ionic: Predict your observations based on above molecular equation: Actual observations:
Answer:
See explanation
Explanation:
Full molecular equation;
2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)
Full ionic equation
2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)
Net ionic equation;
2NH3(aq) + Ag^+(aq) --------> [Ag(NH3)2]^+(aq)
When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.
Do Newton's Laws still apply in space?
Answer:
Yes, they work in space. I forgot an example, will edit the post when I found it
Hope this helps!
give an example of biotic living conditions.
Answer:
plants and animals
Explanation:
Answer:
water, light, wind, soil, humidity, minerals, gases
Explanation:
i just know
Draw a line to connect the following terms to their definition.
what is the formula for tetrahydrogen monocarbide
Answer:
CH4
Explanation:
Tetra is the prefix for four. Hence the H4
Mono is the prefix for one, Hence the C
Methane (aka Tetrahydrogen monocarbide) written as CH4
g the following statements as they apply to gas chromatography. Decide if each is true or false. The technique referred to as gas chromatography is actually gas-liquid chromatography since the stationary phase is a liquid adsorbed on the surface of an inert solid. To be separated using GC, analytes must be volatile. An air peak is commonly used to determine the dead time when using a TCD detector. An FID is insensitive to non-combustible gases such as water and carbon dioxide. A column temperature equal to or slightly above the average boiling point of the sample components results in a reasonable elution time.
Answer: To be separated using GC, analytes must be volatile.
An air peak is commonly used to determine the dead time when using a TCD detector.
An FID is insensitive to non-combustible gases such as water and carbon dioxide.
A column temperature equal to or slightly above the average boiling point of the sample components results in a reasonable elution time.
Explanation:
The gas chromatography works on the principle of separation of gaseous substances based on the differences of vapor pressure. The thermal conductivity detector works on the principle of detection of effluents from the has chamber and the air peak gives indication of the retention time of the effluents. Flame ionization detector can be used for the detection of organic compounds but insensitive for the detection of halogens, non-combustible substances like carbon dioxide and water. The temperature of the column is kept higher than the average boiling point of the substance so as to attain separation of substances by the differences in the elution time.
Take your time please.
Answer:
1.) Eyewash station --> D
2.) Absorbent material --> G
3.) Fire extinguisher --> F
4.) Safety Shower --> E
5.) Biohazard container --> J
6.) Broken glass container --> I
7.) Safety goggles --> C
8.) Lab apron --> H
9.) asbestos gloves --> A
10.) Latex gloves --> B
Explanation:
In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.
These equipments include:
--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.
--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.
--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.
--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.
--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.
--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.
--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.
--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.
--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.
--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards
[tex]Answer :—✔[/tex]
THE OTHER PERSON GAVE THE CORRECT ANSWERaluminium containers are used to store and transport nitric acid(HNO3) but not NAOH why?
Answer:
(i) Concentrated HNO3 can be stored and transported in aluminium containers as it reacts with aluminium to form a thin protective oxide layer on the aluminium surface. This oxide layer renders aluminium passive. (ii) Sodium hydroxide and aluminium react to form sodium tetrahydroxoaluminate(III) and hydrogen gas.
Help me answer this please
Are the electrons in the following redox reactions transferred completely from the atoms of one element to the atoms of another or are they only partially transferred?
a. Ca(s) + Cl2(g) → CaCl2(s)
b. 4Cu(s) + O2(g) → 2Cu2O(s)
The electrons, in redox reaction get partially transferred by one to another element.
What is redox reaction?A redox reaction occurs when the oxidation states of the substrate change. The loss of electrons or maybe an increase in the oxidation state of a chemical and its atoms is referred to as oxidation. The gain of electrons or a reduction in the oxidation state of either a chemical or its atoms is referred to as reduction. The oxidation as well as reduction process can be seen in same reaction which is introduced as redox reaction.
What is electrons?
Electron can be considered as sub atomic particle which carry negative charge on it.
The given reactions are:
a. Ca(s) + Cl2(g) → CaCl2(s)
b. 4Cu(s) + O2(g) → 2Cu2O(s)
After transferring two electron in both reaction Ca and Cu it will form CaCl2 and 2Cu2O.
Therefore, after transferring partially electrons one elements get converted into another kind of molecule
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An experiment requires 66.6 g of ethyl alcohol (density = 0.790 g/mL). What is the volume?
Answer:
Volume = 84.30 mLExplanation:
Mass = 66.6 gram
Density = 0.790 g/mL
Volume = Mass ÷ Density
Volume = 66.6 ÷ 0.790
Volume = 84.30 mL
HELP ASAP! ILL GIVE U BRAINIST ANSWER AND A TY! Need help.