Answers
Answer:
D
Explanation:
Gases have low densities. Density is the mass of an object divided by its volume. Mass of gases are quite small. Since the mass is related to mass of the particles itself. However the volume is great since the gases are far apart due to how weak the forces of attraction are ( gases take the shape of the container which means they take up a good bit of space which means greater volume). A small mass divided by a large volume gives a small value (small density).
Related Questions
HELP
The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. What type of reaction does the diagram best represent? (5 points)
Exothermic reaction
Endothermic reaction
Reaction between two solids
Reaction between two liquids
Answers
Answer:
Exothermic reaction
Explanation:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise
Answer:
Endothermic
Explanation:
Which of the following is true of a balanced equation?
1. The number of atoms per molecule remains the same
2. The kinds of atoms remain the same
3. The number of atoms of each element remains the same
4. The total number of molecules remains the same
Answers
Answer:
The total number of molecules remains the same
Se disuelven 10 g de acido carbónico H2CO3 en 150 g de agua. Determina la concentración % m/m de esa disolución?
Answers
The question is: 10 g of carbonic acid H2CO3 are dissolved in 150 g of water. Determine the% m / m concentration of that solution?
Answer: The% m / m concentration of that solution is 6.66%.
Explanation:
Given: Mass of solute = 10 g
Mass of solvent = 150 g
Formula used to calculate the %m/m is as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100[/tex]
Substitute the values into above formula as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\\= \frac{10 g}{150 g} \times 100\\= 6.66%[/tex]
Thus, we can conclude that the% m / m concentration of that solution is 6.66%.
What is the relationship between
photosynthesis and respiration?
they are inverse processes
they both use oxygen to create energy
A. They are inverse processes
B. They both use oxygen to create energy
Answers
Answer:
A
Explanation:
A bowling ball is let go from a height of 30 cm. What is the velocity of the
ball just before it hits the ground?
Select one:
о
0.30 m/s.
О
17 m/s.
O
24 m/s
a
1.3 m/s
Answers
Answer:
The answer is 0.30 m/s
Explanation:
i search it on
Does anyone know any top brainly users that are good at chemistry?
Answers
Answer:
yes
Explanation:
Answer:
These people were ranked best at chemistry
Explanation:
In a chemical reaction, mass is conserved. This means that...
O A. The mass of the reactants stays the same during a chemical reaction
OB. The mass of the products stays the same during a chemical reaction
OC. The tpye and number of atoms in the reactants equals the type and number of atoms in the products
OD. The mass of the products is always twice the mass of the reactants
Answers
Answer: D
Explanation:
How much concentrated 15.54 M sulfuric acid is need to prepare 6.1 mL of a 2.28 M solution?
Answers
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
HELP QUICK Which of the following planets spins/rotates faster than earth?
A) Saturn
B) Jupiter
C) Venus
D) Mars
Answers
Answer:
B
Explanation:
Jupiter is the fastest spinning planet.
Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)
Use the balanced chemical equation above to determine the number of moles of hydrogen gas that would be produced if 3.50 moles of solid magnesium reacted. please show all work and record your answer with proper units and significant figures.
Pls help
Answers
Answer:
2Mg + 4HCl (aq) --> 2 MgCl2 (aq) + H2
Explanation:
balanced...
Below is a chemical equation. Which of the following are identified by the blue arrows?
Captionless Image
atomic numbers
coefficients
products
subscripts
Answers
Vitamin B12, cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue but not in higher plants. Although nutritional requirements for the vitamin are quite low, people who abstain completely from animal products may develop a deficiency anemia. Cyanocobalamin is the form used in vitamin supplements. It contains 4.34% cobalt by mass. Calculate the molar mass of cyanocobalamin, assuming that there is one atom of cobalt in every molecule of cyanocobalamin. WebAssign will check your answer for the correct number of significant figures. g/mol
Answers
Answer:
645 g/mol
Explanation:
Step 1: Given data
Percent by mass of cobalt in cyanocobalamin: 4.34%
Step 2: Determine the molar mass of cyanocobalamin
There is one atom of cobalt in every molecule of cyanocobalamin, or what is the same, there is 1 mole of atoms of Co in every mole of molecules of cyanocobalamin. Given the molar mass of Co is 28.01 g/mol, the molar mass of cyanocobalamin is:
100 g B12/4.34 g Co × 28.01 g Co/1 mol Co × 1 mol Co/1 mol B12 = 645 g/mol
HELP ME ON THIS
What happens to the particles of a solid when the solid changes into a liquid? (5 points)
They increase in size.
They decrease in size.
The attractive force between them increases.
The attractive force between them decreases.
Answers
Answer:
The attractive force between them decreases
Explanation:
This is because they become localised.
Help please!!!!!!!!!! Both questions!!!!
Answers
on the second on its false.
How many moles is 45g of KCl?
Answers
Answer:
60.36
Explanation:
Answer: 0,60 mol
Explanation:
Molar mass of KCl is M = (39.10 + 35.45) g/mol = 74,55 g/mol
amount of substance n = m/M = 45 g / 74.55 g/mol
What are 3 kinds of moles
Answers
1. Dysplastic Nevi
2. Congenital Nevi
3. Benign Nevi
The animals
1. Hairy-Tailed Mole
2. Star-Nosed Mole
3. Broad-Footed Mole
How many grams equal 4.3 x 1024 atoms of oxygen (O2)?
Answers
Answer:
https://socratic.org/questions/how-many-grams-are-in-1-25-x-10-22-atoms-of-oxygen#403337
Explanation:
A supersaturated solution is said to contain
Answers
Explanation:
A solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature.
I hope it helps
Answer:
A supersaturated solution is said to contain more solute than it can dissolve at that given temperature.
A nucleus of uranium 235 decays. Its decay produces a nucleus of an unknown element (x), a nucleus of helium 4 and energy. What kind of radiation is produced by this decay?
Gamma beta or alpha?
Answers
Answer: Alpha
Explanation:
Alpha particle form of decay produces a nucleus similar to the element helium. During Alpha decay an atom spits out two protons and two neutrons from its nucleus.
he diagram shows a device that uses radio waves.
Two radio towers. The towers are equal distance apart with an arrow between them. The left tower is labeled X. The right tower is labeled Y. The arrow is pointing from Tower X to Tower Y.
What is the role of the part in the diagram labeled Y?
modulate, amplify, and send out waves
capture, amplify, and demodulate waves
change the amplitude and frequency of waves
change the pulse and phase of waves
Answers
Answer:
b
Explanation:
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)
Answers
Answer:
1392. g CO2
Explanation:
Males have glands called testes that release the hormone known as _______________. a estrogen b epinephrine c testosterone d toblerone
Answers
Answer:
testosterone is released from their testes!
How many moles are in 33 L of CO₂ gas at STP?
Answers
3.00 L x 1 mol/22.4 L = 0.134 mol
And 3.00 litres CO2 or any other gas at STP would contain 0.134 moles. If the gas was at some other temperature or pressure, assuming they were “moderate,” you could calculate the number of moles by solving the following formula for n.
PV =nRT Where P is pressure, V is volume, T is temperature in Kelvin and R is the ideal gas constant consistent with the units of volume and pressure used.
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.
Answers
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
Substances formed as a result of a chemical reaction are calledImmersive Reader (1 Point) products reactants catalysts precipitates
Answers
Answer: substances formed as a result of chemical reaction are called PRODUCTS.
Explanation:
A chemical reaction can be defined as a reaction in which substances known as the REACTANTS makes or breaks it's bonds to form another substance usually referred to as the PRODUCT. Usually, a new substance which is referred to as the product that is formed is different from the original reacting substances. Some of the characteristics of a chemical reaction include:
--> colour change,
--> heat production,
--> precipitation
The rate at which these chemical reaction occurs depends on some factors such as pressure, temperature and concentration of the reactants
There are different examples of chemical reaction which includes:
--> Rusting of iron: this occurs when iron and oxygen combines to form a mixture of iron oxides, which is the product of the chemical reaction.
--> The burning of magnesium in air: in this Chemical reaction, magnesium reacts with oxygen to form magnesium oxide which is the product of the chemical reaction.
2Mg(s) + O2(g) △→ 2MgO(s)
--> Production of table salt: this is formed from the reaction of sodium and chloride to give sodium chloride as the product of the chemical reaction.
Therefore in a chemical reaction, no atom is destroyed or created but a new PRODUCT is formed from reactants.
Will give brainliest please help!!
Answers
Answer:
I think it's B so maybe
What mass of silver nitrate will react with 5.85 grams of
sodium chloride to produce 14.35 grams of silver chloride
and 8.5 grams of sodium nitrate?
Answers
I hope it help!
How many moles are in 8.0 gram sample of C3H4
Answers
Answer:
0.18 mol C₃H₈
Explanation:
to find the mole you have to convert the 8.0grams into moles.
8.0g C₃H₈ 1 mol C₃H₈
1 44.0g C₃H₈
*Pretend that those are a table*
I got 44.0g because Carbon is 12.0g you multiply that 3 times because it has a subscript of 3 and do the same for Hydrogen (1.0 x 8) then add those which would be 44.0g.
1 mol of C₃H₈ = 44.0g C₃H₈
now just mulitply and divide them.
8.0g x 1 = 8.0
1 x 44.0g = 44.0
8.0/44.0 = 0.18 mol C₃H₈
A baby chicken has feathers on its feet that are similar to that of its parents. Where are the instructions stored that provide information for a baby chicken’s feathery feet? A) In cytoplasm inside cells B) On genes within chromosomes C) On the cell membrane Eliminate D) In the mitochondria
Answers
Answer:
B) On genes within chromosomes
Explanation:
Answer:
B) On genes within chromosomes
a force of attraction between objects that is due to their masses and distance between objects
a. gravity
b. weight
c. mass
Answers
Answer:
the answer is gravity
hope this helps