Which of these is a behavioral adaptation?
Answer:
a brown bear hibernates and become inactive during winter
How many atoms are needed to react with 50 grams of O2 gas
Answer:
3 moles
Explanation:
3 moles atoms are needed to react with 50 grams of O2 gas.
a weather balloon expands from 3.00 L to 3.25 L. The atmospheric pressure is 0.96 atm. How much work was done on the surroundings?
I really, really, really need help with this. I've been struggling so much to understand thermochemistry!
Answer:
0.96
Explanation:
how many atoms are in 1.6g C? Answer in units of atoms.
(no answer choices were given)
Answer:
6.022 ×10(index 23) / 7.5 = 0.8293 ×10(index 23)
Explanation:
molar mass of C = 12gmol
therefore in 12g of C there is one mole or an amount of 6.022 ×10(index 23)
∴12g/6.02210(index 23) ×1.6g
PLEASE HELP ILL CHOOSE BRAINLIEST I REALLY NEED THE HELP. Tungsten hexaflouride is a very heavy gas (MM=297.8/mol) Find the molar mass the diatomic gas that effuses through a proud plug about 2.8 times faster than the WF6 at the same temperature and pressure?
What is the identity of this diamotic gas?
Answer:
Tungsten(VI) fluoride, also known as tungsten hexafluoride, is an inorganic compound with the formula WF6. It is a toxic, corrosive, colorless gas, with a density of about 13 g/L (roughly 11 times heavier than air.[
Explanation:
The WF6 molecule is octahedral with the symmetry point group of Oh. The W–F bond distances are 183.2 pm. Between 2.3 and 17 °C, tungsten hexafluoride condenses into a pale yellow liquid having a density of 3.44 g/cm^3 at 15 °C. At 2.3 °C it freezes into a white solid having a cubic crystalline structure, the lattice constant of 628 pm, and a calculated density of 3.99 g/cm^3. At −9 °C this structure transforms into an orthorhombic solid with the lattice constants of a = 960.3 pm, b = 871.3 pm, and c = 504.4 pm, and the density of 4.56 g/cm3. In this phase, the W–F distance is 181 pm, and the mean closest intermolecular contacts are 312 pm. Whereas WF6 gas is one of the densest gases, with the density exceeding that of the heaviest elemental gas radon (9.73 g/L), the density of WF6 in the liquid and solid-state is rather moderate. The vapor pressure of WF6 between −70 and 17 °C can be described by the equation
log10 P = 4.55569 −
1021.208
T + 208.45,
where the P = vapor pressure (bar), T = temperature (°C).
Based on the methods used in the video, answer the following gram to gram conversion question:
2 C2H6 + 7 O2 --------> 4 CO2 + 6 H2O
In the combustion of ethane (C2H6), 4.12 grams of water (H2O) was produced. How much ethane (C2H6), in grams, was used in this reaction?
molar mass H2O= 18.02 g/mol
molar mass C2H6= 30.08 g/mol
2.47 g C2H6
2.29 g C2H6
20.63 g C2H6
20.97 g C2H6
Answer:B
Explanation:
If the [H3O+] of a solution is less than the [OH-], what can be said about the solution?
(A) The solution would have a higher pH than its pOH.
(B) The solution could still have a neutral pH.
(C) The solution would have a higher pOH than its pH.
(D) The solution would be basic only if the solution contained a weak acid.
Answer:
I was looking for this same answer.
Explanation:
If the [H₃O⁺] of a solution is less than the [OH⁻], then the solution would have a higher pH than its pOH.
How pOH is define?pOH is define as the negative logarithm of the concentration of OH⁻ ion and for a basic solution its value should be less than 7.
In the question it is clear that concentration of H⁺ ion is les than the concentration of OH⁻ ion, so the given solution is basic in nature. Basicity of basic solution is calculated by using the pOH scale and for this solution value of pOH is less than 7, because more than 7 shows the acidic character. And according to the pH scale value of this solution should be more than 7.
Hence, option (A) is correct i.e. The solution would have a higher pH than its pOH.
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What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try bacon • A metal spoon left in a pot of soup heating on a stove is too hot to touch - An aluminum playground slide gets hot on a summer day. O A Metals combine with nonmetals.O B. Metals are good insulators. O C Metals conduct electricity D Metals conduct heat.
Answer:
D - metals conduct heat
What is the correct name for the cyclic alkane shown on the right?
1,3-dimethyl, 3-ethylcyclohexane
1-ethyl, 1,4-dimethylcyclohexane
1-ethyl-1,3-dimethylcyclohexane
1-ethyl-1,3-dimethylcyclopentane
1,3 dimethyl, 3- ethylcyclopentane
A skeletal model of a six-sided polygon has a single line to a C H 3, and a bent line to a C H 3 from one corner. The second corner away from that counterclockwise also has a single line to a C H 3.
Answer: C
Explanation:
Which diagram represents matter with a definite volume but no
definite shape?
i think it is Substance C
30 points if you tell me your favorite food! ☺️
Answer:
Pizza, salad, tacos, burgers, etc.
Explanation:
:D
Freon, a very useful refrigerant, is produced in the following reaction:
3CCl4 (g) + 2SbF3 (s) → 3CCl2F2 (g) + 2 SbCl3 (s)
If a chemist wants to make 3.0 x 106 moles of Freon using excess carbon tetrachloride, how many moles of antimony trifluoride will the chemist need?
Answer:
The chemistry will need 2*10⁶ moles of antimony trifluoride.
Explanation:
The balanced reaction is:
3 CCl₄ (g) + 2 SbF₃ (s) → 3 CCl₂F₂(g) + 2 SbCl₃ (s)
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
CCl₄: 3 moles SbF₃: 2 moles CCl₂F₂: 3 molesSbCl₃: 2 molesYou can apply the following rule of three: if by reaction stoichiometry 3 moles of freon are produced by 2 moles of antimony trifluoride, 3*10⁶ moles of Freon are produced from how many moles of antimony trifluoride?
[tex]moles of antimony trifluoride=\frac{3*10^{6} moles of freon*2 moles of antimony trifluoride}{3 moles of freon}[/tex]
moles of antimony trifluoride= 2*10⁶
The chemistry will need 2*10⁶ moles of antimony trifluoride.
Compared with halogens, the alkali metals in the same period has
electronegativity
the same
O larger
O smaller
19) Which one of the following statements describes a chemical property of hydrogen gas?
A) Hydrogen gas has a density of 0.00009 g/cm’ at STP.
B) Hydrogen gas burns in air.
C) Hydrogen gas has a boiling point of 20. K at standard pressure.
D) Hydrogen gas is colorless.
The enzyme amylase will affect the breakdown of carbohydrates, but it will not affect the breakdown of proteins. The ability of an enzyme molecule to interact with specific molecules is most directly determined by the
Answer:
Shape of the enzyme and its active site
Explanation:
In the levels of organization of an organism, what does a group of cells make up?
Answer:
they make tissue. form organ and whole body an i true..
What is the charge on the cation in the ionic compound when sodium and sulfur bond?
Answer:
1+
Explanation:
Sodium has one valence electron. When it bonds with a nonmetal like sulfur, it gives up that electron to become a positively charged ion (cation) with a charge of 1+.
If you squeeze a sealed bottle in the middle, what force is applied at the top of the bottle?
A) less force
B) more force
C) the same force
D) cannot be predicted
What is the charge of the atom in the diagram below?
A. -3
B. +1
C. 0
D.+3
Answer:
D. +3
Explanation:
have a wonderful day!!
A
square is a diagram used to predict all possible allele combinations from a genetic
. Using this diagram, the phenotypes of offspring can be determined from the genotypes.
Answer:
AYAYYA
Explanation:
YEA
1. the moderns periodic table, elements are ordered
a. according to decreasing atomic mass
b. according to mendeleev's original design
c. according to increasing atomic number
Answer:
In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom In a periodic table arranged in order of increasing
just help frllllllllllllllllllllllllllllllllllll
Answer: 2 The Proximity toward the ocean
Explanation:
May i plz have brainiest
Definition of fluid friction
Answer:
Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other
Hope it helps
Please mark me as the brainliest
Thank you
Which body system includes the lungs?m
Answer: The respiratory system
Explanation: It includes the nose, mouth, throat, voice box, windpipe, and lungs. Air enters the respiratory system through the nose or the mouth.
The leaves of African violets develop roots and form new
plants when they are placed in water or moist soil. Any leaf
'on the African violet plant shown can produce a new
African violet plant.
Which two terms best describe this kind of reproduction?
O A. Sexual reproduction
B. Vascular reproduction
O O O O
C. Vegetative reproduction
D. Asexual reproduction
Help pls
Answer:
vegetative reproduction and asexual reproduction
Explanation:
Answer:
Asexual and vegetation reproduction
Explanation:
What pressure is required to compress 196.0 liters of air at 1.00 atmosphere into a cylinder whose volume is 26.0 liters?
Answer:
if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is
V
1
and its pressure is
P
1
. Let us suppose that its volume has been increased to
V
2
, the as per the Boyle's law its pressure will decrease and let us assume the new pressure is
P
2
.
P
1
V
1
=
P
2
V
2
P
1
= 1 atm
V
1
= 196 L
P
2
= ?
V
2
= 26 L substitute the values;
1 atm x 196 L =
P
2
x 26 L
P
2
= 1 atm x 196 L / 26 L
P
2
= 196 atm L / 26 L = 7.53 atm
Explanation:
I hope this helps.
Answer:
7.53 atm
Explanation:
Boyle studied the relationship between the pressure of a trapped gas and its volume. The data obtained by him shows that the product of pressure and volume for the trapped air sample is constant at a constant temperature. if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is V 1 and its pressure is P 1 . Let us suppose that its volume has been increased to V 2 , the as per the Boyle's law its pressure will decrease and let us assume the new pressure is P 2 . P 1 V 1 = P 2 V 2 P 1 = 1 atm V 1 = 196 L P 2 = ? V 2 = 26 L substitute the values; 1 atm x 196 L = P 2 x 26 L P 2 = 1 atm x 196 L / 26 L P 2 = 196 atm L / 26 L = 7.53 atm
What happens to pressure if temperature increases? Pressure increases. Pressure stays the same. Pressure decreases. Temperature has no effect on pressure.
Answer:
Pressure increases
Explanation:
According to Gay-Lussac's law, the pressure of a given amount of gas is directly proportional to the temperature at a given volume i.e.
[tex]P\propto T[/tex]
It means the relationship between the pressure and the temperature is direct.
If the temperature increases, the pressure of the gas also increases. Hence, the correct option is (A).
Which statement describes the solar feature shooting off into space labeled C?
An envelope of plasma surrounding the sun
A stream of glowing gas that shoots out from the sun in an arch
A brief eruption of intense high-energy radiation from the sun's surface
A dark spot appearing from time to time on the sun's surface
A 30L sample of N2 at 20*C is heated to 50*C. The pressure at 20*C was at 3 atm. What is the pressure of N2 after its temperature increased?
Volume stays constant, so: P1/T1 = P2/T2
P1 = 3 atm
T1 = 20*C = 293 K
P2 = ?
T2 = 50*C = 323 K
Solve for P2: P1T2/T1 = P2
P2 = (3 atm)(323 K)/(293 K) = 3.3 atm
The Pressure of N2 after its temperature increased will be "3.3 atm". To understand the calculation, check below.
Pressure and Temperature:According to the question,
Pressure, P₁ = 3 atm
Temperature, T₁ = 20°C or,
= 293 K
T₂ = 50°C or,
= 323 K
We know the relation,
→ [tex]\frac{P_1}{T_1}[/tex] = [tex]\frac{P_2}{T_2}[/tex]
or,
Pressure, P₂ = [tex]\frac{P_1\times T_2}{T_1}[/tex]
By substituting the values,
= [tex]\frac{3\times 323}{293}[/tex]
= [tex]\frac{969}{293}[/tex]
= 3.3 atm
Thus the above response is correct.
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What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
We have that for the Question "" it can be said that the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules is
Amount of CO_2(g)=221.35g
From the question we are told
What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
Generally the equation for the is mathematically given as
[tex]No moles in 3*02*10^{24}=\frac{3.03*10^{24}}{6.023*10^-{23}}[/tex]
No moles in 3*02*10^{24}=5.03moles
Amount of CO_2(g)=5.03moles *44g/mol
Amount of CO_2(g)=221.35g
Hence
the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules is
Amount of CO_2(g)=221.35g
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