Sound travels fastest through solids.
it would be cold gasses because of how air at 0 is faster then at 100
What are the three major Eras from 600 million years ago to today
Answer:
he Paleozoic, Mesozoic, and Cenozoic.
Explanation:
"What is the potential energy relative to the water surface of a diver at the top of a 26 m
high diving platform? Suppose she has a mass of 35 kilograms."
Answer:
PE = 8918 J
Explanation:
Formula for potential energy here is;
PE = mgh
Where;
m is mass
g is acceleration due to gravity
h is height
We are given;
m = 35 kg
h = 26 m
Thus;
PE = 35 × 9.8 × 26
PE = 8918 J
Read the question and help me with the answer please
Make a song give me some bars
Answer:
Make me a song give me some bars wait am i rappin to hard livin life high crazy right touch on her shhh f in th mhm aint waistin no time lets get into it tonight
Explanation:
How many atoms are in 0.256 mol Fe?
For this one, you can use the formula:
# of atoms = # of moles * Avogadro's number
# of atoms = (0.256 mol) * (6.02 * 10^23)
# of atoms = 1.54 * 10^23 atoms
Hope It helped you!
Atoms are the smallest unit of molecules. In 0.256 mol of iron, there are 1.54 × 10²³ atoms.
What are atoms?Atoms are small entities of the compound or the molecule that can be measured by Avogadro's number. The number of atoms can be given as the product of the moles and the Avogadro's number.
If 1 mole of iron = 6.02 × 10²³
Then, 0.256 moles = 0.256 × 6.02 × 10²³
Therefore, 1.54 × 10²³ atoms of iron are present in 0.256 moles.
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The graph below shows distance over time. Which of these situations
could be represented by this graph?
Pls answer quick
Answer:
the second option
Explanation:
look at the distance where the meet up at the house and the go to school
1. The type of bond most likely to
occur between Mg and Br is a(n)
bond.
---
Answer:
Ionic bond.
Explanation:
Group 7 elements like Bromine (Br) and group 2 elements like Magnesium,(Mg) involved loss and gain of electrons which is typical with Ionic bonding.
how many grams of carbon tetrachloride can be produced from reacting 709.0 grams of chlorine (CI2) with excess methane?
A sample of gas has a volume of 12.0L and a pressure of 2.00 atm. If the pressure of gas is increased to 6.00 atm, what is the new volume of the gas?
A. 2L
B. 4L
C. 16 L
D. 8L
Answer:
B; 4 L
Explanation:
From the Boyle’s law of gases, the volume occupied by a given mass of gas is inversely proportional to the pressure exerted by the gas
Mathematically, we have this as;
PV = K
Given;
P1 = 2 atm
V1 = 12 l
P2 = 6 atm
V2 = ?
We have that;
P1V1 = P2V2
2 * 12 = 6 * V2
V2 = (2 * 12)/6
V2 = 24/6
V2 = 4 L
1. Name two organisms that are competing for energy and explain HOW they compete.
Answer:
There could be a few answers for this question, but my answer would be two different plants. Maybe a bush on the ground fighting for the energy of the sun with a tall tree. Leaves collect the energy from the sun and convert it to energy usable for the plant. a bush on the ground would be fighting for the sunlight with a tall tree.
The periodic table has columns that group Elements according to their
A. Name
B. Properties
C. Atomic number
D. Mass
Marking brainlist
Explanation:
atomic number.............
Choose the options below that are true. (select all that apply) Select all that apply:
a. The rate law for a given reaction can be determined from a knowledge of the rate-determining step in that reaction's mechanism.
b. The rate laws of all chemical reactions can be determined directly from their net chemical equations.
c. The rate laws of bimolecular elementary reactions are second order overall.
d. The rate law for a given reaction can be determined from its reaction mechanism,
Answer:
a, c are true statements
Explanation:
First statement concludes that only the slower stage or the rate deciding phase of the reaction allows for the rate law to be calculated. This is true
The second declaration is not valid in all regards, because we can not evaluate the correct rate law by just observing the net equation. It needs to be determined experimentally.
In the third statement, most of the bimolecular reactions are second order in general, since two reactants exist. Hence, it is true
The fourth declaration is wrong. To measure the rate of each elemental phase accompanying the response, we must observe the rates
What is the correct IUPAC name for Al(IO₃)₃?
Answer:
Aluminum Iodate
The IUPAC name of Al(IO3)3 is diiodyloxyalumanyl iodate.
What is IUPAC name ?The systematic method of nomenclature of the organic or inorganic compound on the basis of International Union of Pure and Applied Chemistry.
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How is a molecule different
from an element?
A. An element is made of more than one
type of atom.
B. A molecule has properties different
from the elements making up the
molecule.
C. An element shares electrons and a
molecule does not.
Answer:
A
Explanation:
Molecule is a substance with two or more atoms bonded together such as the oxygen humans breathe (O2). Elements are pure substances made up of all the same atoms such as gold (Au), hydrogen (H), and oxygen (O). Elements all have the same number of protons in their nuclei and can't be broken down.
PLEASE HELP What's the mass in grams of 0.442 moles of calcium bromide, CaBr2? The atomic
weight of Ca is 40.1 and the atomic weight of Br is 79.9.
A) 452.3 g
B) 53.04 g
C) 44.2 g
D) 88.4 g
Answer: Thus there are 88.4 g of calcium bromide.
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Molar mass of = 40.1 (1)+ 2(79.9) = 199.9
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]0.442=\frac{x}{199.9}[/tex]
[tex]x=88.4g[/tex]
Thus there are 88.4 g of calcium bromide.
I neeeedddd hhheeelppppppllsssss
Answer:
I believe that it is the 2nd option.
Explanation:
My reasonings are because C4H10O has 7 isomers. In which 4 are alcohol and the other 3 are ether.
The first option is ethers, specifically ethoxyethane.
The third option is ethers, specifically 1-methoxypropane.
The fourth option is an alcohol, specifically 1- butanol.
Therefore, leads us to the 2nd option that it is NOT an isomer of C4H10O
Why is boiling water a physical change
Answer:
it is cleaning the water and heating it
Answer:
When boiling the water, the water will begin to evaporate and thats the physical change.
More than half of the elements are in which state of matter at room temperature?
What happens to the atomic mass when the atomic numbers increase?
Which elements does not belong to a main group of elements?
Please help I really need help!!
Answer:gas
Explanation:
What is the boiling point of 1 cup of water with 6 tablespoons of salt?
Explanation:
best answer i could say was this
What consist of a solid matter?
What is a coefficient?
Answer:
in math it's " a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4x y)."
In physics " a multiplier or factor that measures some property."
Explanation:
hope this is helpful!
Answer:
A coefficient is the number before a variable
Explanation:
A numerical or constant quantity placed before and multiplying the variable in an algebraic expression
2. Germ cells are found in the
A. heart
B. lungs
C. muscles
D. ovaries
Answer:
D- located in ovaries...
A buffer solution contains 0.345 M acetic acid and 0.377 M sodium acetate . If 0.0613 moles of potassium hydroxide are added to 250 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume does not change upon adding potassium hydroxide. )
Answer:
pH = 5.54
Explanation:
The pH of a buffer solution is given by the Henderson-Hasselbach (H-H) equation:
pH = pKa + log[tex]\frac{[CH_3COO^-]}{[CH_3COOH]}[/tex]For acetic acid, pKa = 4.75.
We calculate the original number of moles for acetic acid and acetate, using the given concentrations and volume:
CH₃COO⁻ ⇒ 0.377 M * 0.250 L = 0.0942 mol CH₃COO⁻ CH₃COOH ⇒ 0.345 M * 0.250 L = 0.0862 mol CH₃COOHThe number of CH₃COO⁻ moles will increase with the added moles of KOH while the number of CH₃COOH moles will decrease by the same amount.
Now we use the H-H equation to calculate the new pH, by using the new concentrations:
pH = 4.75 + log[tex]\frac{(0.0942+0.0613)mol/0.250L}{(0.0862-0.0613)mol/0.250L}[/tex] = 5.54Angus, Hereford, and Holstein are common types of ___
breeds.
NEED HELP NOW
Answer:Cattle
Explanation:Cattle
how is the water cycle the driving process behind weathering erosion and deposition
C2H6 + Cl* => C2H5* + HCl
Answer:
C2H6 + Cl → C2H5 + HCl
equation is balanced
An insecticide kills many insects, but a few survive. Because of natural selection, which of the following is most likely to happen
1- Eventually the survivors will become resistant to insecticide
2- the survivors will reproduce, and the offspring will be resistant to the insecticide
3- the survivors will reproduce, but the offspring will be killed by another application of the insecticide
4- the survivors will continue to survive for many years beyond their normal lifespan
Answer:
2
Explanation:
the ones that survived are the ones that had the favorable trait, so they'll be able to reproduce and their offsprings are likely to receive that trait as well.
0.24 moles of a gaseous product from a reaction is collected in a 25.0-L container at a pressure of 300.0 kPa. Determine the temperature (in °C) at which the gas was collected.
Answer:
3428.58 °C
Explanation:
We'll begin by converting 300 KPa to atm. This can be obtained as follow:
101.325 KPa = 1 atm
Therefore,
300 KPa = 300 KPa × 1 atm / 101.325 KPa
300 KPa = 2.96 atm
Next, we shall determine the temperature. This can be obtained as follow:
Number of mole (n) = 0.24 mole
Volume (V) = 25 L
Pressure (P) = 2.96 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV = nRT
2.96 × 25 = 0.24 × 0.0821 × T
74 = 0.24 × 0.0821 × T
Divide both side by 0.25 × 0.0821
T = 74 / (0.24 × 0.0821)
T = 3755.58 K
Finally, we shall convert 3755.58 K to °C. This can be obtained as followb:
T(°C) = T(K) – 273
T(K) = 3755.58 K
T(°C) = 3755.58 – 273
T(°C) = 3428.58 °C
Thus, the temperature at which the gas was collected is 3428.58 °C
What is a way of moving electricity along a path called? *
battery
circuit
static electricity
electrons
The asthenosphere flows because of