Answer:
Decrease
Explanation:
Since the speed in which the gas molecules are faster as they are heated, they fly around in the container and logically, it is harder to insert a moving object into water than something more stationary or slower.
If the student added larger drops to the pan, the
what?of the waves would increase.
Answer:
this makes no sense you arent gonna get help
Explanation:
Answer:
Amplitude
Explanation:
Im taking this test rn lol
The temperature of a gas is decreased. What effect does this
have on the speed of the particles?
o The particles speed up.
o The particles slow down.
o The particles are destroyed.
The temperature has no effect on the speed of the
particles.
Explanation:
The temperature has no effect on the speed of the
particles.
I’m kinda stuck with this part of the paper
Answer:
oK so pay pattention to the fractions
Explanation:
How much of a 10 M solution is needed to make 1 liter of a 1 M solution
Answer:
0.1 L
Explanation:
M₁ × V₁ = M₂ × V₂
10M × V₁ = 1M × 1L
V₁ = 0.1 L
I hope this helps :)
The molar dilution can be used to estimate the molarity or the volume. 0.1 L of 10 M solution is required to make 1 M of solution.
What is the dilution factor?A dilution factor of the molar concentration is used to calculate the molar concentration or the volume needed to make the diluted solution from the stock.
Given,
M₁ = 10 M
V₁ = ?
M₂ = 1 M
V₂ = 1 L
The volume is calculated as:
M₁ V₁ = M₂ V₂
10 V = 1 × 1
V = 1 ÷ 10
= 0.1 L
Therefore, 0.1 L of the 10 M solution is needed.
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what is synthetic polymers
Answer:
Synthetic polymers are human-made polymers, and they are commonly found in a variety of consumer products. Various main chains and side chains are used to make different synthetic organic polymers.
How much energy does a photon of frequency 6 x 10^12 Hz have?
A. 2.21 x 19^-42 J
B. 3.98 x 10^-21 J
C. 1.988 x 10^-25 J
D. 1.10 x 10^-46 J
Answer:
B.3.98x10^-21 JExplanation:
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Li2O + MgCl2 → 2 LiCl + MgO
What type of reaction is going on in this equation.
Answer:
water
Explanation:
Which physical property causes cork to float on top of water?
Which happens when a reversible reaction reaches a state of chemical equilibrium?
A. The system runs out of reactant particles.
B. The concentrations of reactants and products are equal.
C. The activation-energy barrier is eliminated.
D. The rates of forward and reverse reactions are equal.
The pH of a solution is 2.55. What is the [H3O+]?
Answer:
[H₃O⁺] ≈ 0.00282 M
General Formulas and Concepts:
Acid/Base Equilibria
Bronsted Acid/Bronsted Base
pH Formula: pH = -log[H₃O⁺]
[H₃O⁺] Formula: [tex]\displaystyle [H_3O^+] = 10^{-pH}[/tex]
Explanation:
Step 1: Define
pH = 2.55 (Acidic)
Step 2: Solve
Substitute in pH [Molar Concentration Formula]: [tex]\displaystyle [H_3O^+] = 10^{-2.55}[/tex]Evaluate exponent: [tex]\displaystyle [H_3O^+] = 0.002818[/tex]Step 3: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.002818 M ≈ 0.00282 M
How many moles of NH3 can be made from 0.93 moles N2?
0.62 mol NH3
1.86 mol NH3
0.93 mol NH3
0.47 mol NH3
PLZ HELP!!!!!! IN YOUR OWN WORDS PLZ! :D
Imagine your cell phone rings. Describe how the sound gets transmitted from your phone to your ear, and then, from your ear to your brain. In your response, be sure to mention the type of wave that a sound wave is, the medium the sound is transmitted through before it gets to your ear, and what happens in your ear once the sound reaches it.
Answer:
String a piece of twine between the cups. Use a long piece of string to help the sound travel farther. Tie a knot in the end of the string to keep it in the cup. Decorate the cups if desired. One person can hold the phone up to their ear and the other person can talk into the other cup. Keep the string tight or the sound waves won’t travel.
Explanation:
for the oxidation of iron to form iron(iii)oxide
4Fe(s)+3O2(g)=2Fe2O3(s) deltaS^o=-549.73J×K^-1 at 298K
the enthalpy of formation of Fe2O3(s) is -824.2 kj×mol^-1. what is the standard change in gibbs free energy for this reaction at 298K? Delta G^o=delta H^o-T delta S^o
Answer:
only god knows the answer
The Gibbs free energy is given by the change in enthalpy, temperature, and change in entropy. The standard change in Gibbs free energy for oxidation of iron is –1484.6 kJ.
What is Gibbs free energy?Gibbs free energy is the energy present in a thermodynamic system that is used by the reactant to form a product. It is given as,
Δ G° = Δ H° -T ΔS°
The oxidation reaction of iron is given as,
4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
Given,
ΔS° = –549.73 J∙K⁻¹
T = 298 K
Δ H° = –824.2 kJ∙mol⁻¹
Substituting values above the Gibbs free energy is calculated as:
Δ G° = Δ H° -T ΔS°
= –824.2 kJ∙mol⁻¹ - 298 K ( –549.73 J∙K⁻¹)
= -1484580.46 J
The units of joules are converted into kilojoules and the standard change in Gibbs free energy will be –1484.6 kJ.
Therefore, –1484.6 kJ is the Gibbs free energy.
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How many total atoms in 3CuSO4
Answer:
18
Explanation:
Element Symbol no of Atoms
Copper Cu 3
Sulfur S 3
Oxygen O 12
18 = total
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, there are total 18 electrons in the given compound.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Element Symbol no of Atoms
Copper Cu 3
Sulfur S 3
Oxygen O 12
S, there are total 18 electrons in the given compound.
Therefore, there are total 18 electrons in the given compound.
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Please help!!! Best answer will get brainliest
PLS HELP ASAP NO LINKS PLS
Which of the following is the most common source of pollution?
oil
coal
nuclear
gas
Answer:
Coal puts out more Co2 emissions than Oil or Gas and Nuclear energy plants don't put out any pollution.
Explanation:
Even though Coal is your answer it is actually a very clean form of generating energy. Not only is it very clean but it is the most effecient means. Solar and Wind power can't even come close to the production and turnover that Coal, Gas, and Oil can. Wind Turbines are so innefficent that they somtimes don't even pay off what it took to build them in thier lifetime of service. The production of Wind Turbines puts out more pollution than any of the Coal or Natural Gas Plants. Solar power is not very efficent either but it is on it's way. It is also very expensive.
help pls it's about cells
6. The redox reaction that occurs during the operation of a battery is best described as
1) non-spontaneous and occurring in a chemical (voltaic) cell
2) spontaneous and occurring in a chemical (voltaic) cell
3) non-spontaneous and occurring in an electrolytic cell
4) spontaneous and occurring in an electrolytic cell
Answer:
1
Explanation:
The redox reaction that occurs during the operation of a battery is best describes as non-spontaneous and occurring in a chemical (voltaic) cell.
What is a redox reaction?Redox reactions are those reactions in which oxidation or reduction reaction occurs. In these reactions, losing of an electron occur.
An example is formation of hydrogen fluoride.
Thus, the correct option is (1) non-spontaneous and occurring in a chemical (voltaic) cell.
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What is the molarity of a 0.4 liter solution containing 1.6 moles of NaCl?
Answer:
4 M
Explanation:
Molarity refers to the molar concentration of a substance (solution). It can be calculated by using the formula below:
Molarity (M) = number of moles (n) ÷ volume (V)
According to the information provided in this question;
V = 0.4 liter
n = 1.6 moles
Molarity = n/V
Molarity = 1.6/0.4
Molarity = 4 M
An elastic cord can be stretched to its elastic limit by a load of 2N.If a 35cm length of the cord is extended 0.6cm by a force of 0.5N,what will be the length of the cord when the stretching force is 2.5N
Explanation:
[tex]from \: hookes \: law \\ F = k.e \\ but \: e = 0.6 \: cm \\ 2 = k \times 0.6 \\ k = 3.33 \\ when \:F \: is \: 2.5 \\ 2.5 = 3.33 \times e {}^{.} \\ {e}^{. } = 0.75 \: cm \\ new \: length = 35 - {e}^{.} \\ = 35 - 0.75 \\ = 34.25 \: cm[/tex]
Which of the following examples best illustrates an effect of pollution on an ecosystem?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
Cutting down a forest for lumber removes available habitat for local animals, forcing them to move or compete for remaining resources.
(Choice B)
B
The number of wolves in an area declines due to urbanization and hunting, allowing elk and deer populations to grow rapidly.
(Choice C)
C
Nitrogen and phosphorus runoff from agricultural fields creates harmful algal blooms and dead zones in the ocean.
what are the products in a chemical reaction?
Answer:
it's c trust me
Explanation:
c cause it's c
Answer:
d
Explanation:
i dont know
makes the most sense to me
When an object is pushed by a force and moves in the direction of the force, work is done on the object. The amount of work equals the force times the distance (W = Fd). A small particle is pushed by a force of 2.6 × 10-4 newtons over a distance of 3.7 × 10-3 meters. How much work was done on the particle? Express the answer to the correct number of significant figures and in proper scientific notation. The force did × 10 newton-meters of work on the particle.
Explanation:
[tex]workdone = force \times distance \\ W = (2.6 \times {10}^{ - 4} ) \times (3.7 \times {10}^{ - 3} ) \\ W = 9.62 \times {10}^{ - 7} \: joules[/tex]
The formula W = Fd, where W is the amount of work done, F is the force, and d is the distance, is used to determine how much work is done on a particle when it is pushed by a force. The force and distance in this issue are 2.6 10-4 newtons and 3.7 10-3 metres, respectively.
What is the way to calculate the work done ?We add the force and distance together to determine the work done: 9.62 10-7 newton-meters are equal to W = 2.6 10-4 newtons x 3.7 10-3 metres. The response must be presented using the appropriate scientific notation and significant numbers.
The solution should include three significant figures, just like the numbers in the problem, which have three. Therefore, 9.62 10-7 newton-meters is the correct answer.
This response uses appropriate scientific language.notation because the exponent is a negative power of 10 and the coefficient ranges from 1 to 10. In conclusion, the particle underwent work from the force of 9.62 10-7 newton-meters. This response uses the appropriate scientific notation and the correct number of significant digits.
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Why were scientists unsure about the last common ancestor between apes and humans?
Answer:
Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.
Explanation:
A surfact that DOES NOT allow water to pass through.
Answer:
impermeable
Explanation:
Answer:
aquifer?
Explanation:
Three categories of factors that cause illness or injury are shown here. Match each example on the right to its correct match on the
left.
A baby is born with an abnormal number of chromosomes.
Angela was badly injured in a car accident after her air bag
exploded.
Alex forgot to get a flu shot and missed two weeks of school
with the flu. Answer choices pathogenic agents, genes , environmental factors
Answer:
Alex forgot to get a flu shot and missed two weeks of school
(g) How does the colour of a star help to find its age?
The Soil conservation method in which mountain slope is cut into step is..
Answer:
Terracing.
Explanation:
Soil formation occurs as a result of the the decay or the remains of plants and animals which are used up.
Weathering can be defined as the physical and chemical breakdown of rock into smaller pieces called sediment. Weathering can be classified into two categories namely;
I. Physical weathering : it is the process of breaking rocks into pieces without affecting its chemical composition e.g temperature, abrasion and frost action.
II. Chemical weathering : it is the process of breaking rocks into pieces by chemical action which leads to changes in its chemical composition e.g carbonation, hydration, plant acid and oxidation.
Soil conservation can be defined as the use of various techniques so as to prevent the loss of the top most later of the soil and protecting it from degradation. Thus, the fertility of the soil is maintained.
The soil conservation method in which mountain slope is cut into step is terracing.
Answer:
Terracing
Explanation:
The Soil conservation method in which mountain slope is cut into step is Terracing.
Be + Cl₃N -----> Cl₂ + Be₃N₂ *
Answer:
3Be + 2NCl₃ ⟶ 3Cl₂ + Be₃N₂
-TheUnknownScientist
electronic configurations and charges of the ions
in lithium fluoride?
Answer:
Explanation:
The electronic configuration of a lithium atom is 2.1 and that of a fluorine atom is 2.7
an atom of lithium donates an electron to an atom of fluorine to form an ionic compound. The transfer of the electron gives the lithium ion a net charge of +1, and the fluorine ion a net charge of -1.