PLS HELP!!
The average human will breathe in 1.2 million moles of oxygen atoms in their lifetime. What is the mass of this amount of oxygen in grams?
Answer:
19,199,280 grams
Explanation:
0.062502343837894 grams in one mole of oxygen
Which of the following are units for energy? Gram, joule, kilogram, calorie
Can someone help me please
Answer:
D
Explanation:
John is not a very good businessman.
:D
What is the [A-] when 50 ml of 0.1 M NaOH is added to the 100 ml solution mixture which is in 0.1 M HCl and 0.1 M acetic acid? (Ka =1.75*10-5) Lütfen birini seçin: a. 6.7*10-3M b. 1.32x10-3 M c. 3.6*10-6 d. 0.067 M e. 0.33 M
Answer:
[A⁻] = 0.067 M
Explanation:
In this case, let's see what happen in the mixture of the acid.
As we can see we have a strong acid and a weak acid, at the same concentration. so the moles would be the same:
moles HCl = moles CH₃COOH = 0.1 moles/L * 0.1 L = 0.01 moles
Now, the moles of the base would be:
moles NaOH = 0.1 * 0.050 = 0.005 moles
As the base is a strong base, it will react first with the strong acid, in this case, HCl as given:
NaOH + HCl --------------> NaCl + H₂O
i. 0.005 0.010 0 0
c. -0.005 -0.005 +0.005 +0.005
e. 0 0.005 0.005 0.005
The base reacts completely with the strong acid, leaving the CH₃COOH completely in solution, so:
CH₃COOH + NaOH -------------> CH₃COONa
i. 0.01 0 0
e. 0 0 0.01
So, the [A⁻] would be the [CH₃COONa]:
[A⁻] = 0.010 / (0.1 + .050)
[A⁻] = 0.067 MHope this helps
Which of the following are elements in this equation:
2Ca (s) + O2(g) - 2Cao (s)?
Check all that apply.
A. g
B. Ca
C. O
D. s
Answer:
calcium they are basically group 1,2,3 elements
Consider the following reaction methane (CH4) combines with oxygen to create carbon dioxide and dihydrogen monoxide. Which of the following would be the coefficient of methane (CH4) in the balanced equation?
a. 2
b. 4
c. 5
d. 1
e. 3
Answer:
I believe it is one. I attached what I think is the balanced equation of the problem you gave. The answer is d.1
Explanation:
CH4+4O=CO2+2H2O
A mutation can cause which of the following in an organism?
1 Have no effect
2Be beneficial
3 Be harmful
6Causes a new trait
5 All of the above
Answer: 5 all of the above
Explanation:
A mutation can be a blessing or a curse. It can also have no effect on the person at all.
Hope this helps
What is the role of the producer in any food chain?
Question 1 options:
Producers turn light energy into food energy
Producers make the food that consumers eat
Without producers, consumers would starve
All of these answers are correct
Answer:
All of these answers are correct.
Explanation:
They are all correct because producers make their food(energy) through photosynthesis, they provide food to herbivores and therefore the rest of the food chain, and without them, the food chain would collapse and all the consumers would starve.
(C) The silver carp is another species native to Asia that was introduced to aquaculture operations and sewage treatment ponds in the Mississippi River valley to control excess algae
accumulation. The species escaped from these operations into the Mississippi River and its tributaries and has the potential to invade the Great Lakes. Scientists are concerned that this
species is having severe negative impacts on these areas.
() Propose a potential solution, other than physically removing the carp from the rivers, to manage the problem of the invasive silver carp in the United States.
Answer:
Introducing predator of silver carp or an invasive species that can feed upon silver carp
Explanation:
The solution is attached
2A(g) + B(l) ⇌ 3C(aq) + D(s)
Answer:
B
[(0.75)^3(0.25)]÷[(0.50)^2(0.75)]
Explanation:
toppr dot com
one of many cells in the retina of the eye that responds to low light. VOCABULARY
Answer:
I hope this helps you!
Explanation:
The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. ... The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision.
The retina is the back thing of the eye that has the cells that respond to the light. These specialized cells are known as photoreceptors.
why do solids not diffuse
Answer:
This is because of diffusion , the movement of particles from an area of high concentration to an area of low concentration. ... This means that diffusion does not happen in solids – the particles in a solid can only vibrate and cannot move from place to place.
Answer:
Solids cannot diffuse each other because they are tightly packed and they are rigid and do not have fluidity.
beta-plus decay sodium protons and neutrons
Answer:
(β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission.
Explanation:
Answer:
Beta decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other. ... In beta plus decay, a proton decays into a neutron, a positron, and a neutrino: p Æ n + e+ +n.
Explanation:
What do we mean when we say atoms bond together?
Answer:
When two or more atoms chemically bond together, they form a molecule. Sometimes the atoms are all from the same element.
A Compound.
Explanation:
For example, when three oxygen atoms bond together, they form a molecule of ozone (O3). If a molecule forms from atoms of two or more different elements, we call it a compound.
Hope this helps!!
Which statement best explains what causes the phase change from solid ice to liquid water?
Answer:
The melting point is the temperature at which a solid changes into a liquid. The melting point of a solid is the same as the freezing point of the liquid. At that temperature, the solid and liquid states of the substance are in equilibrium. For water, this equilibrium occurs at 0°C.
Explanation:
Answer: Heat or pressure causes the phase change from solid ice to liquid water.
NEED HELP ASAP CHEMISTRY. Giving away Many points, i got 20+ more questions
I'm almost positive that it's D
Which of the following statements correctly describes the greenhouse effect
What is a decay series?
a series of reactions that never ends
a different form of chemical bonding
a chain of decays that results in a stable nucleus
a series of chemical reactions that ends with a decay\
HELPPPPPP
Answer:
a chain of decays that result in a stable nucleus
Explanation:
Decay series is a series of decay in which radioactive element is decomposed in different elements until it produces one stable atom.
Answer:
C
Explanation:
took test Edg
Why do you think evolution is important?
The force measured to move a sled was 10 newtons and the sled was moved 10 meters in 25 seconds, what was the power used?
Answer:
4 W
Explanation:
P = (10 N×10 m)/25 s = 4 W
do you think it is good to bring torches into the cave
Answer:
no
Explanation:
better use flashlichts
What volume of solution would be needed to deliver 3.0 mg of a drug if the concentration of the drug in the solution was 3.5% (m/v)?
Show work please
Answer:
The correct answer is "85.71 mg".
Explanation:
The given values are:
Mass of drug,
= 3.0 mg
Mass percentage,
= 3.5%
As we know,
⇒ [tex]Mass \ percent = \frac{Mass \ of \ drug}{Mass \ of \ solution}\times 100[/tex]
Or,
⇒ [tex]Mass \ of \ solution = \frac{Mass \ of \ drug}{Mass \ percent}\times 100[/tex]
On substituting the values, we get
⇒ [tex]=\frac{3.0}{3.5}\times 100[/tex]
⇒ [tex]=0.8571\times 100[/tex]
⇒ [tex]=85.71 \ mg[/tex]
Write the electronic configuration of the following element or ion and circle on their valance electrons
A.27 Al =
13
B. 31p-3
15
please answer my question now ! I will give you a Brinalist
1s2,2s2,2p6
Explanation:
electron arrangements
which organic compound has 4 carbon atoms with at least one triple bond?
Answer:
butene
Explanation:
what is the mass of a sample of sulfur with a volume of 5.0 cm3
Answer:
0.00714 g
Explanation:
We know that the volume of one mole of a substance is 22400 cm^3
Thus;
1 mole of sulphur occupies 22400 cm^3
x moles of sulphur occupies 5.0 cm3
x = 5.0 cm3 * 1 mole/22400 cm^3
x = 2.23 * 10^-4 moles
Molar mass of sulphur = 32 g/mol
Mass of sulphur = 2.23 * 10^-4 moles * 32 g/mol
Mass of sulphur = 0.00714 g
1.00 mole of an ideal gas occupies a volume of 22.4 L at 0 C and 760 mmHg (STP). It is cooled to -41 C while the pressure is increased to 805 mmHg. What is the new volume of the gas in liters?
Answer:
[tex]V_2=18.0L[/tex]
Explanation:
Hello there!
In this case, according to the given information, we infer that we need the combined gas law in order to solve this problem:
[tex]\frac{P_2V_2}{T_2}} =\frac{P_1V_1}{T_1}}[/tex]
Thus, by suing the temperatures in Kelvins, we can solve for the final volume as shown below:
[tex]V_2 =\frac{P_1V_1T_2}{T_1P_2}}\\\\V_2 =\frac{(760mmHg)(22.4L)(232K)}{(273K)(805mmHg)} \\\\V_2=18.0L[/tex]
Regards!
8. If 400 mL of gas has a temperature of 75°C, then what would be the new volume if the temperature increased to 95°C?
We are given:
V₁ = 400 mL T₁ = 75°c = (273+75)K = 348K
V₂ = x mL T₂ = 95°c = (273+95)K = 368K
Deriving Boyle's Law:
here, we can see that the volume and temperature are the only variables
from the ideal gas equation:
PV = nRT
T /V = P / nR
because P, n and R are constants, P/nR is a constant value
T / V = constant
which means that the initial and final ratio of P and T will be constant, hence:
T₁ / V₁ = T₂ / V₂, this is also known as the Charles' law. what I did above was it's derivation
Finding final volume:
plugging the given values:
348/400 = 368 / x
x = 368*400 / 348
x = 422.9 mL
WILL GIVE BRANLIEST!!! Methane, CH4 is a __ (polar, nonpolar) molecule. In a molecule of methane, the primary intermolecular forces are ___ (London dispersion forces, dipole dipole forces, hydrogen forces, hydrogen bonding)
Answer:
Nonpolar; London dispersion forces
Explanation:
What is the oil refining process?
Answer:
"the chemical engineering processes and other facilities used in petroleum refineries to transform crude oil into useful products such as liquefied petroleum gas, gasoline or petrol, kerosene, jet fuel, diesel oil and fuel oils"
-wikipedia
Explanation:
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
An oil refinery or petroleum refinery is an industrial process plant where crude oil is transformed and refined into useful products such as petroleum naphtha, gasoline, diesel fuel, asphalt base, heating oil, kerosene, liquefied petroleum gas, jet fuel and fuel oils.
Thanks Hope it helps.2.(06.01 MC)
The graph compares the kinetic energies of the molecules in four gas samples. Each graph shows a normal distribution, so the average is the center.
Fraction of Molecules
Kinetic Energy
Which sample is likely to have the lowest temperature? (1 point)
Answer:
The gas A is likely to have the lowest temperature
Explanation:
In a gas, the kinetic energy is directly proportional to the temperature under constant pressure and volume.
As you can see in the problem, the average of A has a low kinetic energy. But the average is increasing between B, C and D.
As the gas A has the lowest average kinetic energy:
The gas A is likely to have the lowest temperature