Answer:
32.065 g
Explanation:
molecular weight of Sulfur or grams The molecular formula for Sulfur is S. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Sulfur, or 32.065 grams.
Please help me thanks so much??!!.:;))..I will mark you:))
Answer:
the last one
Explanation:
What is one way a pathogen can enter the body?
Question 3 options:
Nose
Broken Skin
Mouth
All of the above
Need help on 13 and 17. The picture covers number 13, the question in number 17 is “Where do you think Styrofoam would be on the chart above? Why? Explain your answer?”
Answer:
13. We see a left skewed data trend with a parabolic nature. The speed of conductivity increases as the material become more conductive, such that copper is the most condutive material compares to copper, and copper compared to plastic shows low conductivity.17. Styrofoam is a mixture of plastics and hence is an insulator such that Q(dot) can be 0 in an ideal system. So it can conduct better than plastic such that it should be above plastic due to the insulation properties.Explain why an empirical formula alone cannot be used to derive the actual molecular formula for a given compound. Provide one or more examples.
Answer:
Because an empirical formula only shows the most simple ratio between elements in a compound while the molecular formula gives the actual number of each element in a certain molecule. Take the example of glucose. It has a molecular formula of [tex]C_6H_{12}O_6[/tex]. However, the smallest ratio between the atoms are 1:2:1 respectively. So the empirical formula would be [tex]CH_2O[/tex]. Clearly not representing the molecular formula.
Explanation:
Suppose a sample of gas is composed of 100 molecules, with speeds given below. Speed (m/s) Number 200 23 400 42 600 26 800 8 1000 1 According to the kinetic molecular theory, if the absolute temperature of the gas is halved, what is a reasonable estimation of the new distribution of speeds of the molecules
Answer:
The answer is:
[tex]speed(\frac{m}{s}) \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (number)\\\\ 100 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 23 \\\\ 200 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 42 \\\\ 300 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 26 \\\\ 400 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 8 \\\\ 500 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 1 \\\\[/tex]
Explanation:
Its total kinetic energy of a gas colloquial atom colloction is equal to absolute temperature alone, according to the programs that directly gas Theory.
Average speed for 1st option:
[tex]= \frac{(200 \times 23)+(400 \times 42)+(600 \times 26)+(800 \times 8) +1000}{100} \\\\= 444\ \frac{m}{s} \ \ \ \ \ \ \ \ \ \text{average speed of gas}[/tex]
Average speed for 2nd option:
[tex]= \frac{(200 \times 11) +(400 \times 21)+ (600 \times 13)+ (800 \times 4)}{11+21+13+4} \\\\= 440 \ \frac{m}{s}[/tex]
Average speed for 3rd option:
[tex]= \frac{(200 \times 43) +(400 \times 50)+ (600 \times 7)}{100} \\\\ =328 \ \frac{m}{s}[/tex]
Average speed for 4th option:
[tex]= \frac{(200 \times 50) +(400 \times 25)+ (600 \times 13)+(800\times 8)+(1000 \times 4)}{100}\\\\ =382\ \frac{m}{s}[/tex]
Average speed for 5th option:
[tex]= \frac{(100 \times 23) +(200 \times 42)+ (300 \times 26)+(400\times 8)+500}{100}\\\\ =222 \ \frac{m}{s}[/tex]
The average speed also increased by half because the temperatures had kinetic energy.[tex]\to 444 \ \frac{m}{s}\ to \ 222 \ \frac{m}{s}[/tex]
3- There are 8
basic elements of
life. True or false?
Answer: No that is false.
Explanation: There are 6 basic elements of life here they are. Have cells, have chemicals, respond to stimuli, reproduce, grow and develop, and use energy.
What kind of mixture is formed when you add soil and water? Explain.
Answer:
Mud
Explanation:
Mud is a solid mass and water is a liquid mass. The water takes some attributes of the solid and mixes the two forms of matter. both masses create mud it's basic alchemy
Draw the full structures of these compounds and identify the functional groups.
a) CH2=CHCONH(CH2)2CN
b) EtO2CCH2OCOEt
Answer:
See attached picture.
Explanation:
Hello!
a) In this case, since oxygen there is present as C=O, as shown on the attached picture, we can see the following functional groups:
- Double bond (alkene).
- Amide group.
- Nitrile group.
b) In this case, since Et suggest an ethyl radical (CH3-CH2-) and the presence of those 2 oxygen atoms accounts for carboxyl, we have:
- Two carboxyl groups for an ethyl propanedioate ester.
Best regards!
Define international system of units , where does the system originate
Answer: See explanation
Explanation:
The International System of Units (SI), is also referred to as the metric system, and it is the standard for measurement internationally.
It should be noted that the The International System of Units (SI), originated from France. It is the system of measurement that is accepted officially worldwide. e.g. S.I unit for time is seconds.
QUESTION 5
How many molecules are in 5.47E0 moles of carbon dioxide?
Answer:
6.02 x 10²³molecules
Explanation:
From the problem statement, we have been given the number of moles of the carbon dioxide to be 5.47°;
Any number raised to the power of 0 is 1,
So,
The number of carbon dioxide is 1
From mole concept;
1 mole of any substance contains 6.02 x 10²³molecules
The number of molecules in the carbon dioxide is 6.02 x 10²³molecules
If 3 newton's of force is pulling
on 3 newton's of force,
A. there is no movement.
B. the force is not balance d.
C. one force moves.
how dose the mass and size of an atom compare to the mass and size of the nucleus
Answer:
Explanation:
The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.
A covalent bond forms when
when a chemical change occurs, if the temperature drops, what effect will it have on the rate of chemical reaction?
Answer:
the rate of reaction would decrease
Explanation:
What is temperature equilibrium?
A. When particles of matter have reached an equal
temperature
B. The flow of energy from one particle to another
C. When particles of matter are moving in the exact same
manner
Answer: A
Explanation: equilibrium is where all the paricles are at the
how does a compound relate to your life
Answer:
its your opinion or something
Explanation:
its your own life so how does ot relate to yours?
Answer:
most living matter consists primarily of the so called bulk elements: oxygen, carbon, hydrogen, nitrogen, and sulfur the building blocks of the compounds that constitute our organs and muscles. These five elements also constitute the bulk of our diet; tens of grams per day are required for humans.
Explanation:
hope it helps :)
can u pls help me with this question
Answer:
A. liquid to gas
The wavelength of green light from a traffic signal is centered at 5.20 x 10-7 m.
Calculate the frequency.
Answer: 5.77 * 10¹⁴s⁻¹
Explanation:
Speed = Frequency * Wavelength
Frequency = Speed/ Wavelength
Speed of light = 3 * 10⁸ m/s
Frequency = (3 * 10⁸ m/s) / (5.20 x 10⁻⁷m)
= 5.77 * 10¹⁴hz
= 5.77 * 10¹⁴s⁻¹
7 Students take a field trip to the neares
beach to explore the formation of sand
dunes. What is the best tool to use to
measure the height of a sand dune?
metric ruler
stopwatch
meter stick
calculator
what would be a logical explanation for why carbon dioxide increased over the time shown in the graph.
A. the area of land for crops incresed
b. the amount of plants eaten by animal increased
c. the amount of fossil fuels being burned increased
d. the amount of wood being burned by pepole increased
Answer:
c. the amount of fossil fuels being burned increased
Explanation:
Carbon dioxide gas concentration increased over the time due to burning of fossil fuels increased. Fossil fuels are organic compounds which releases carbondioxide gas as a result of burning of fossil fuels in the engines of vehicles and industries. With the passage of time, number of vehicles increases in the world which needs more fossil fuels and due to burning of that fossil fuels, more carbondioxide gas is released.
Hydrogen bonding exits between Molecule A and Molecule B as an intermolecular force. Use the numbers, (1) - (5), to determine where hydrogen bonding exists.
Answer:
E
Explanation:
The molecules A and B are shown in the image attached.
Intermolecular hydrogen bonding exists between hydrogen and an electronegative atom when the hydrogen is attached to a strongly electronegative atom. Hydrogen bonding is common in compounds such as HF, HCl, H20, CH3OH etc
Hydrogen bonding can occur between atoms 2 and 4 since they satisfy the conditions mentioned above. atom 3 can not participate in hydrogen bonding because the hydrogen is not attached to a highly electronegative element,
In this exercise we have to use the knowledge of chemistry to be able to describe the hydrogen bonds in the informed molecules:
We can say that the hydrogen bonds are all single in both molecules and we get in molecule A one bond and in molecule B six bonds.
Intermolecular hydrogen stick exists middle from two points hydrogen and an electronegative smallest part of something when the hydrogen is socially join to a strongly electronegative smallest part of something. Hydrogen fasten is generally known fashionable compounds such as HF, HCl, H20, CH3OH etc
Hydrogen fasten can occur middle from two points atoms 2 and 4 because they satisfy the environment noticed above. atom 3 can not take part in hydrogen fasten because the hydrogen exist not attached to a very electronegative essential feature.
See more about hydrogen bonds at brainly.com/question/4542860
I need help as soon as possible
Answer:
D
Explanation:
If particles of matter gain or lose enough kinetic energy what can happen?
A. They can gain or lose electrons.
B. None of these
C. They can change phase.
D. They can gain or lose potential energy.
Answer:
B
When a sample of solid, liquid, or gas matter heats up, it expands. When matter gets hot, its particles gain kinetic energy. The increased kinetic energy pushes the particles farther apart. This causes the matter to expand.
None of these. Hence, option B is correct.
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
When a sample of solid, liquid, or gas matter heats up, it expands. When matter gets hot, its particles gain kinetic energy. The increased kinetic energy pushes the particles farther apart. This causes the matter to expand.
Hence, option B is correct.
Learn more about kinetic energy here:
https://brainly.com/question/22174271
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In a coffee-cup calorimeter, 100.0 g of H2O and 100.0 mL of 1M HCl are mixed. The HCl had an initial temperature of 44.6 C and the water was originally at 24.6 C. After the reaction, the temperature of both substances is 31.3 C.
Required:
a. Was the reaction exothermic or endothermic? Explain.
b. Calculate how much heat the water lost or gained.
Answer:
Exothermic reaction for the HCl, endothermic reaction for the water
[tex]2803.28\ \text{J}[/tex]
Explanation:
Heat was lost by HCl as its temperature lowered, so it was an exothermic reaction for the HCL.
Heat was gained by water as its temperature increased, so it was an endothermic reaction for the water.
m = Mass of water = 100 g
c = Specific heat of water = [tex]4184\ \text{J/kg}^{\circ}\text{C}[/tex]
[tex]\Delta T[/tex] = Change in temperature of water = [tex](31.3-24.6)^{\circ}\text{C}[/tex]
Heat is given by
[tex]Q=mc\Delta T\\ =0.1\times 4184\times (31.3-24.6)\\ =2803.28\ \text{J}[/tex]
Heat gained by water is [tex]2803.28\ \text{J}[/tex].
What is the outer layer of the suns atmosphere?
determine the molecular mass of the following compounds
Answer:
(a).
(4 × C) + (8 × H)
= (4 × 12) + (8 × 1)
= 48+8
= 56 g
(b).
= (4 × C) + (6 × H)
= (4 × 12) + (6 × 1)
= ( 48+6 )
= 54 g
(c).
= ( 2 × Si ) + ( 4×Cl ) + (2×H)
= (2×28) + (4×35.5) + (2×1)
= 56 + 142 + 2
= 200 g
(d).
= (1×P) + (4×O) + (3×H)
= 31 + 64 + 3
= 98 g
1- A sample of Ne(g) has a volume 250 mL at 752 mm Hg. What is the
new volume if the temperature and amount of gas held constant, the
pressure is;
a) lowered to 385 mm Hg.
b) Increased to 3.68 atm
Answer:
A. 488.31 mL.
B. 67.22 mL.
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
A. Determination of the new volume when the pressure is lowered to 385 mmHg.
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 385 mmHg
Final volume (V₂) =?
P₁V₁ = P₂V₂
752 × 250 = 385 × V₂
188000 = 385 × V₂
Divide both side by 385
V₂ = 188000 / 385
V₂ = 488.31 mL
Thus, the new volume of the gas is 488.31 mL
B. Determination of the new volume of the gas when the pressure is increased to 3.68 atm.
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 3.68 atm.
Final volume (V₂) =?
Next, we shall convert 3.68 atm to mmHg. This can be obtained as follow:
1 atm = 760 mmHg
Therefore,
3.68 atm = 3.68 atm × 760 mmHg / 1 atm
3.68 atm = 2796.8 mmHg
Thus, 3.68 atm is equivalent to 2796.8 mmHg.
Finally, we shall determine the new volume of the gas as follow:
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 2796.8 mmHg.
Final volume (V₂) =?
P₁V₁ = P₂V₂
752 × 250 = 2796.8 × V₂
188000 = 2796.8 × V₂
Divide both side by 2796.8
V₂ = 188000 / 2796.8
V₂ = 67.22 mL
Thus, the new volume of the gas is 67.22 mL
can u pls help me with this question
Imagine you live next door to your best friend. Your bedroom windows face each other, and you want to set up a way to communicate privately using waves. You have these supplies:
a long string
a spring toy long enough to stretch between your windows
metal cans
a Morse code alphabet decoder (Morse code is a system that represents letters of the alphabet with dots and dashes)
You can use as many of these supplies as you want.
Answer:
then use those and set up one
Explanation:
Answer:
the string and the cans for me. its like your own phone
Explanation:
helium gas diffuses 4 times as fast as an unknown gas. What is relative molecular mass of the gas
The relative molecular mass of the gas : 64 g/mol
Further explanationGiven
Helium rate = 4x an unknown gas
Required
The relative molecular mass of the gas
Solution
Graham's Law
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
r₁=4 x r₂
r₁ = Helium rate
r₂ = unknown gas rate
M₁= relative molecular mass of Helium = 4 g/mol
M₂ = relative molecular mass of the gas
Input the value :
[tex]\tt \dfrac{4r_2}{r_2}=\sqrt{\dfrac{M_2}{4} }\\\\16=\dfrac{M_2}{4}\\\\M_2=64~g/mol[/tex]
