Answer:A compound is a unique substance that forms when two or more elements combine chemically. A compound always has the same elements in the same proportions. The properties of compounds may be very different from the properties of the elements that form them. Some compounds form rigid frameworks called crystals.
Explanation:
Answer:
An element or compounds’ physical properties are far easier to detect. These properties are things that can be observed without changing the identity of the element or compound. These properties include color, smell, freezing point, boiling point, melting point, opacity, viscosity, and density.
Explanation:
A 2.2 M solution is made by with 0.45 moles of a solute. What is the final volume of this solution?
Answer: The final volume of this solution is 0.204 L.
Explanation:
Given: Molarity of solution = 2.2 M
Moles of solute = 0.45 mol
Molarity is the number of moles of solute present divided by volume in liters.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\2.2 M = \frac{0.45}{Volume}\\Volume = 0.204 L[/tex]
Thus, we can conclude that the final volume of this solution is 0.204 L.
Which of the following can be used to detect the presence of an acid?
A. All of the answers are correct
B. blue litmus paper
C, a red cabbage solution
D. an indicator
How much concentrated 15.54 M sulfuric acid is need to prepare 6.1 mL of a 2.28 M solution?
Answer:
0.895 mL
Explanation:
Using the formula;
C1V1 = C2V2
Where;
C1 = initial concentration (M)
C2 = final concentration (M)
V1 = initial volume (mL)
V2 = final volume (mL)
According to the information provided in this question;
C1 = 15.54M
V1 = ?
C2 = 2.28M
V2 = 6.1 mL
Using C1V1 = C2V2
V1 = C2V2 ÷ C1
V1 = (2.28 × 6.1) ÷ 15.54
V1 = 13.908 ÷ 15.54
V1 = 0.895 mL
What is a group of words called that contains elther a subject or a verb, but not both?
Answer:
Phrase
Explanation:
Phrases don't have both, but clauses do.
PLEASE HELP!!!!!!!!!!
what is the mole fraction of MgCl2 in a solution created by dissolving 132.1 g of MgCl2 into 9.72 mol of water?
1 - 0.125
2- 12.5
3- 2.50
4- 0.225
Thallium-207 has a half-life of 4.77 minutes. If an initial sample weighed 155 grams, and
now only weighs 2.42 grams, how many half-lives have occurred?
A.4
B.6
C.5
D.3
Answer:
6
Explanation:
You divide the initial sample weight (155) by 2 until you get to 2.42.
a force of attraction between objects that is due to their masses and distance between objects
a. gravity
b. weight
c. mass
Answer:
the answer is gravity
hope this helps
When precipitation falls in summer, sometimes wind pushes it back up into freezing temperatures before falling again. What will most likely occur when this happens?
A.
hail will fall
B.
rain will fall
C.
sleet will fall
D.
snow will fall.
Answer:
A
Explanation:
hail will fall push it back up making it bigger comes back down
WORTH 20 POINTS!! Need answer ASAP
Answer:
i cant see the image im good at chem if you can write it down in the comments ill answer it
Explanation:
help me get this right no links
Answer:
The moons gravitational pull on Earth
Which of the following is a way to decrease the pressure of a gas?
A. Increase the number of molecules
B. Increase the volume
C. Decrease the volume
Answer:
b
Explanation:
because pressure is inversely proportional to volume.
Also with a larger volume the gas particles will collide less on each other and the walls of the container
A way to decrease the pressure of a gas is to decrease the volume.
What are ways to increase the pressure of a gas?
Three Ways to Increase the Pressure of a Gas
Increase the amount of gas.Increase the temperature of the gas.Decrease the volume of the gas.What are the 3 factors that affect gas pressure?Temperature, pressure, volume, and the amount of a gas influence its pressure.
Learn more about gas laws here https://brainly.com/question/25290815
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How many molecules are there in 24 grams of HSO₃?
Answer:
1.2×1023 molecules.
hope it helps
Below is a chemical equation. Which of the following are identified by the blue arrows?
Captionless Image
atomic numbers
coefficients
products
subscripts
why hydroxide an oxidation reaction??
Answer:
sorry I didn't know this one i did all the work and stuff and still couldn't get it sorry
Which of the following substances
represents a compound?
A. saline: NaCl and H,0
B. helium: H
c. carbon dioxide: CO
D. iron; Fe
Which statement about light energy is incorrect?
A. Light energy travels as electromagnetic waves
B. We can only see light if the wavelengths are in a
certain part of the electromagnetic spectrum
C. Refraction is when light bends as it passes through
another medium
D. Light is absorbed at a higher rate if the color of the
object it hits is brighter
Answer:
The correct answer is C
Explanation:
light refracts whenever it travels at an angle into a substance with a different refractive index(optical density)
why should the wearing of uniforms be discontinued in highscho
Name two metals which will not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
To solve such this we must know the concept of double displacement reaction. Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from dilute tetraoxosulphate(vi) acid.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.
Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
Learn more about the chemical reactions, here:
https://brainly.com/question/3461108
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Power gathered from the sun and wind
A
is considered a nonrenewable resource.
B
can provide humans with energy forever.
с
can only be used in the daytime.
D
is not a natural resource.
Answer: B. Can provide humans with energy forever
Explanation: The warm air rises and cooler air rushes in to take its place. The moving air is wind. As long as the sun shines, there will be winds on the Earth. We will never run out of wind energy.
If an organism ingests 950.0 g of glucose (C6H12O6) in its lifetime, how many grams of carbon dioxide (CO2) will be released? (molar mass C6H12O6 = 180.156 g/mol) (molar mass CO2 = 44.009 g/mol)
Answer:
1392. g CO2
Explanation:
If I dilute 213 mL of 9.22 M H2SO4 to 390 ml, what would be the concentration (molarity) of the new solution?(round your answer to the hundredths
place)
HELLOPPPPP PLEASEEE ):
Answer:
5.0 moles
Explanation:
213/390 x 9.22 = 5.04
Round to least sig fig (390 ml)
5.0
Which process is exothermic?
a) the vaporization of water b) the freezing of water c)the sublimation of dry ice d ) the boiling of liquid nitrogen
Answer:
Freezing of water
Explanation:
When water becomes a solid it releases heat into its surroundings (warming it up).
Substances that can carry electric current under some conditions but not under others are called semiconductors.
A .332 mold sample of gas at a constant pressure and temperature has a volume of 150.0mL. If the volume of the gas is decreased to 50.0mL, how many moles of the gas will remain
Answer:
0.111 mol
Explanation:
We can solve this problem by using Avogadro's law, which states that at constant pressure and temperature:
V₁n₂=V₂n₁Where in this case:
V₁ = 150.0 mLn₂ = ?V₂ = 50.0 mLn₁ = 0.332 molWe input the data given by the problem:
150.0 mL * n₂ = 50.0 mL * 0.332 molAnd solve for n₂:
n₂ = 0.111 molWhich field of study examines homologous structures?
A) Genetics
B) Embryology
C) Comparative Anatomy
D) Physics
[tex] \huge\mathcal\colorbox{red}{\color{pink}{質問 ↷}}[/tex]
what are Noble Gases?
Answer:
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
Explanation:
The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
WILL GIVE BRAINLIEST ANSWER!!!
How many moles of hydrogen are required to produce 6 moles of water?
Answer: 6 moles
Explanation:
The balanced equation for this reaction is [tex]2\text{H}_{2}+\text{O}_{2} \longrightarrow 2\text{H}_{2}\text{O}[/tex].
This means that for every 2 moles of water produced, 2 moles of hydrogen are consumed.
Thus, if 6 moles of water are produced, this means 6 moles of hydrogen are consumed.
A student puts his signature with graphite pencil.
If the mass of carbon in the signature is 10-12g, calculate
the number of carbon atoms in the signature.
Answer:
If the mass of carbon in the signature is 10-12g, calculate. the number of carbon atoms in the signature. the answer is 5.01 x 10^10 atom.
Explanation:
wlcm
please mark me as brainliest
Please help thank you
Answer:
The answer is the 2nd one down: The green house affect
I really need help with this chemistry assignment multiple choice
Answer:
b option to is correct and answer bro