ANSWER ASAP PLEASE
Ball 1 has a mass of 10 g. Ball 2 has a mass of 30 g. Which prediction tells how
gravity will act on the balls when dropped?
O
A. The pull of gravity will be greater on ball 1.
B. The pull of gravity will be greater on ball 2.
C. The pull of gravity will be the same on each ball.
O
D. The pull of gravity will not act on either ball.
Answer:
c
Explanation:
i rememer this from 3rd grade
How many liters of volume is one mole of gas at standard temperature and
pressure?
22.7 liters
The molar volume of an ideal gas depends on the temperature and pressure. One mole of any ideal gas occupies 22.7 liters at 0 0C and 1 bar (STP).
Hope this helped
This equation is balanced: N2+H2 -NH3
A. True
B. False
Elements of the same subgroup have the same number of electrons on the outer layer. Am i right?
Answer:
yes
Explanation:
because they have similar chemical properties
The value of ΔH° for the reaction below is -336 kJ. Calculate the heat (kJ) released to the surroundings when 23.0 g of HCl is formed. CH4(g) + 3Cl2(g) → CHCl3(l) + 3HCl(g)
The heat (kJ) released to the surroundings : -70.56 kJ
Further explanationReaction
CH₄(g) + 3Cl₂(g) → CHCl₃(l) + 3HCl(g) ΔH°=-336 kJ
For 3 mol HCl formed ⇒ ΔH°=-336 kJ
23.0 g of HCl :
mol[tex]\tt \dfrac{23}{36.5}=0.63[/tex]
Heat released for 0.63 mol HCl :
[tex]\tt \dfrac{0.63}{3}\times -336=-70.56~kJ[/tex]
The heat (kJ) released to the surroundings at the given equation is 70.7KJ.
The calculation is as follows:We know that
[tex]Moles\ or\ HCl\ formed = mass \div molar\ mass\\\\= 23.0\div 36.46[/tex]
= 0.631 mole
Since energy should be related at the time when 3 moles of HCI should be generated = 336 K
Now energy released is
[tex]= (336\div 3)\times 0.631[/tex]
= 70.65 kJ
Hence we can conclude that heat released to the surrounding is 70.7 kJ.
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Calculate the value of ni for Hydrogen if a violet line from the Balmer series has a recorded wavelength of 410 nm.
Solution :
Given that the violet line from Balmer series having a recorded wavelength of 410 nm. As the recorded wavelength is 410 nm we know, the wavelength range of violet light is 380 nm -450 nm. So the 410 nm is corresponding to violet light wavelength.
We know, among all the series of lines spectrum of [tex]$H_2$[/tex] atom, only the Balmer series are in visible range. For Balmer series, the equation of wavelength associated with the e-transition of n = 2 orbit to n > 2 is
[tex]$\frac{1}{\lambda}=R\left[\frac{1}{2^2}-\frac{1}{n^2}\right]$[/tex]
where, R = Rydberg constant = 109678 per cm
λ = wavelength
Here the recorded λ = 410 nm = [tex]$410 \times 14^{-7} \ cm$[/tex]
∴ [tex]$\frac{1}{410 \times 10^{-7}}=109678\left[\frac{1}{2^2}-\frac{1}{n^2}\right]$[/tex]
[tex]$\frac{1}{2^2}-\frac{1}{n^2}=\frac{1}{410 \times 10^{-7}\times 109678}$[/tex]
[tex]$\frac{1}{4}-\frac{1}{n^2}=0.222$[/tex]
[tex]$\frac{1}{n^2}=\frac{1}{4}-0.222$[/tex]
[tex]$n^2=\frac{1}{0.0276}$[/tex]
[tex]$n^2=36.2$[/tex]
[tex]$n^2 $[/tex] ≈ 36
n = ±6
Here, n is the principle quantum number. It cannot be negative, so the value of n = 6 for hydrogen atom if the violet line from Balmer series that has a recorded wavelength of 410 nm.
The value of n for the Hydrogen transition in the Balmer series with the wavelength 410 nm has been 6.
The principal quantum number in the Balmer series transition has been given by n. The minimum transition for the Balmer series has been from the 2 energy level.
The expression for the wavelength transition can be given by:
[tex]\rm \dfrac{1}{\lambda}\;=\;R\;[\dfrac{1}{2^2}\;-\;\dfrac{1}{n^2} ][/tex]
[tex]\lambda[/tex] = Wavelength = 410 nm = 410 [tex]\rm \times\;10^-^7[/tex] cm
R = Rydbreg constant = 109678/cm
[tex]\rm \dfrac{1}{410\;\times\;10^-^7}\;=\;109678\;[\dfrac{1}{2^2}\;-\;\dfrac{1}{n^2} ][/tex]
[tex]\rm \dfrac{1}{410\;\times\;10^-^7\;\times\;109678}\;=\;\;[\dfrac{1}{2^2}\;-\;\dfrac{1}{n^2} ][/tex]
[tex]\rm 0.222\;=\;\;[\dfrac{1}{2^2}\;-\;\dfrac{1}{n^2} ][/tex]
[tex]\rm 0.222\;=\;\;[\dfrac{1}{4}\;-\;\dfrac{1}{n^2} ][/tex]
[tex]\rm 0.222\;-\;\dfrac{1}{4}\;=\;\dfrac{1}{n^2}[/tex]
[tex]\rm n^2\;=\;36.2[/tex]
n = 6
The value of n for the Hydrogen transition in the Balmer series with the wavelength 410 nm has been 6.
For information about the Balmer series, refer to the link:
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The first person who suggested that matter was made up of atoms was the Greek philosopher ____________________ .
Answer:
Democritus
Explanation:
Answer:
Democritus of Abdera
Explanation:
what is the molarity of an HCI solution if 25.0 ml of 0.185 M NaOH is required to neutralize 0.0200 L of HCI?
Answer:
Molarity of HCl solution = 0.25 M
Explanation:
Given data:
Volume of NaOH= V₁ = 25.0 mL (25/1000 = 0.025 L)
Molarity of NaOH solution=M₁ = 0.185 M
Volume of HCl solution = V₂ = 0.0200 L
Molarity of HCl solution = M₂= ?
Solution:
M₁V₁ = M₂V₂
0.185 M ×0.025 L = M₂ × 0.0200 L
M₂ = 0.185 M ×0.025 L / 0.0200 L
M₂ = 0.005M.L /0.0200 L
M₂ = 0.25 M
Draw the Lewis structure for the ClO3- ion on paper. How many valence electrons are found in the ion
Answer:
25 valence electrons.
Explanation:
Hello!
In this case, based on the attached picture, you can see that the chlorate ion has three oxygen atoms and one chlorine ion, whereas you can see there is a coordination bond (two arrows) from chlorine to oxygen which means that oxygen receives two electrons from chlorine in order to complete its octet and to allow chlorine to not exceed the octet. It means there is another oxygen completes its octet via the Cl=O bond and the the last oxygen is negatively charged because it is missing one bond to attain its octet even thought chlorine actually completes its octet.
Therefore, this ion has seven valence electrons from chlorine and 18 valence electrons from the three oxygen atoms, which means it has 25 valence electrons overall.
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________ is a strong and flexible material found in a skeleton.
Answer:
Cartilage
Explanation:
Be careful, if you grind down your cartilage it pinches your nerves and can cause serious problems
g For a given arrangement of ions, the lattice energy increases as ionic radius ________ and as ionic charge ________.
Answer:
as the charge of the ions increases, the lattice energy increases. as the size of the ions increases, the lattice energy decreases.
For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
What is ion?An atom or molecule is said to be an ion if one or more of whose valence electrons have been acquired or lost, providing it a net negative or positive electrical charge.
Faraday knew that metals disintegrated together into solution place at a single electrode and that a second metal was placed first from solution at the opposite electrode, as such matter had to be trying to move underneath the impact of an electrical current even though he was unable to identify the particles trying to move between the electrodes. For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
Therefore, for a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
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hellllpppppppp mee plzzzzzzzxzzzxzxzzzzzxx
What is the mass number of this atom ?
What formula do you use to calculated density?
O Volume X Mass = Density
O Volume + Mass = Density
O Mass + Volume= Density
Mass - (Volume) x Matter = Density
Cle
Answer:
7 AM was the first to be the best Friend and a friend and I have seen the target market share of a million dollars and Diamond.
Answer:Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Explanation:
A blank solution containing only solvent had an absorbance of 0.029 at the same wavelength. Find the molar absorptivity of compound A.
Answer:
The question is incomplete. Searching in google I found: A 3.96x10⁻⁴ M solution of compound A exhibited an absorbance of 0.624 at 238 nm in a 1.000-cm cuvette. A blank solution containing only solvent had an absorbance of 0.029 at the same wavelength. Find the molar absorptivity of compound A.
The molar absorptivity of compound A is 1502.5 M⁻¹cm⁻¹.
Explanation:
The question is incomplete. Searching in google I found: A 3.96x10⁻⁴ M solution of compound A exhibited an absorbance of 0.624 at 238 nm in a 1.000-cm cuvette. A blank solution containing only solvent had an absorbance of 0.029 at the same wavelength. Find the molar absorptivity of compound A.
The absorbance (A) is given by:
[tex] A = \epsilon cl [/tex]
Where:
c: is the concentration of compound A = 3.96x10⁻⁴ M
ε: is the molar absorptivity of compound A =?
l: is the pathlength = 1 cm
[tex]A_{s}[/tex]: is the absorbance of the solution= 0.624
[tex]A_{b}[/tex]: is the absorbance of the blank solution= 0.029
First, we need to find the absorbance of compound A:
[tex] A = A_{s} - A_{b} = 0.624 - 0.029 = 0.595 [/tex]
Now, we can calculate the molar absorptivity of compound A:
[tex] \epsilon = \frac{A}{cl} = \frac{0.595}{3.96 \cdot 10^{-4} M*1 cm} = 1502.5 M^{-1}cm^{-1} [/tex]
Therefore, the molar absorptivity of compound A is 1502.5 M⁻¹cm⁻¹.
I hope it helps you!
How many electrons are gained in the half-reaction 02 + electrons → 2029
A. 2
B. 1
C. 0
D. 4
Answer:2
Explanation:
He
It can be seen that the three methyl groups in camphor and isoborneol show up as separate peaks, whereas those in borneol overlap to where they almost appear as a single peak. Based on your knowledge of chemical shift factors, explain why this is so?
Answer:
isoborneol and camphor both have methyl groups that have different shielding zones with -OH and -C=O groups respectively.
Explanation:
Using the knowledge of chemical shift we can see that out of the three methyl groups in isoborneol, there are two methyl groups that are not influenced by the chemical Influence of the -OH functional group while one of the methyl groups is influenced by the -OH functional group.
For Camphor, two out of the three methyl groups are in shielding zones of the Carbonyl group, -C=O. While the last of the three methyl groups is out of the shielding zones of Carbonyl group, -C=O.
Analyze how water affects mass movements by using two examples of mass
movement.-
Answer:
Types Descriptions
Flows occur when soil or rock acts like a liquid
Slumps a slice of material that moves as one piece along a curved surface
Landslides made up of unconsolidated rock; includes rockslides and avalanches
Creeps material that moves slowly down gently sloping areas
Explanation:
Googled it.
Water can affect mass movements by reducing the friction along a sliding surface and can also allow particles to slide past each other easily.
Mass movement refers to the transfer of rocks and solid downslope as a result of gravity. Mass movement is the relocation of surface material such as solid or rock from a point along a slope to a position that's further down the slope.
It should be noted that water triggers mass movement. This is done as water fills the pores that are in the sediments, this then allows the particles to slide past each other easily.
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Cardinals are birds that do not migrate but spend the winter in New York State. Many people feed these birds sunflower seeds during the winter months. the starches present in the sunflower seeds help the cardinals to survive. Identify the building blocks of starches
Answer:
simple sugar
Explanation:
The northern cardinal is a bird of the Cardinalis genus. It s also called as the red bird. It is mostly found in Canada, United states and parts of Texas and Mexico. The Cardinal birds do not migrate in winter and spends the winter season in New York. These birds are fed with sunflower seeds by the people during the winter season. The starches in the seeds of the sunflower helps these birds to survive in the winter. The glucose or the simple sugar found in the starches are the building blocks of the starches.
what is the median number of seeds that germinate at 32
Answer:65
Explanation:
If there is a total of 100J of
energy in a system and 40 of energy is kinetic,
how much potential energy is there
Answer:
60j because 100-60=40j
A sample of hydrogen sulfide, H2S, has a mass of 35.50 g. Calculate the number of hydrogen sulfide molecules in the sample.
Answer:
Number of hydrogen sulfide molecule = 5.7672 x 10²³ (Approx)
Explanation:
Molar mass of H2S = (1x2) + 32 = 34 g
Total number of molecule = 34 / 35.50
Total number of molecule = 0.9577
Avogadro's number = 6.022 x 10²³
Number of hydrogen sulfide molecule = 0.9577 x 6.022 x 10²³
Number of hydrogen sulfide molecule = 5.7672 x 10²³ (Approx)
Which formula is an ionic compound?
CO2
NaF
N2
NO2
Answer:
def CO2
Explanation:
WILL GIVE BRAINLIEST!
Calculate the bond for CO2
Answer:
Bonding Order = number of bonding electrons – number of antibonding electrons/2.
So for CO2, there is a total of 16 electrons, 8 of which are antibonding electrons.
So 16 – 8 = 8; divided by 2 = 4. So, 4 is the bonding order of CO2. The molecular structure of CO2 looks like this:
..~-~~..
O=C=O
..~-~~..
which sample is a pure substance
a. a test tub of zinc oxide
b. a container of zinc and oxygen
c. A flask of Pondwater
d. A jar of soil
according to law of conservation of energy, amount of energy is constant. then why is energy in electric cells used up?
Answer:
it is because all energy are bound to use up according to the law of conversion of energy
how many moles of hydrogen are needed to produce 8 moles of methane CH4? C + H2-> CH4
Answer:
20 mol H₂
General Formulas and Concepts:
Chem
StoichiometryExplanation:
Step 1: Define
RxN: C + H₂ → CH₄
8 moles CH₄
Step 2: Balance RxN
C + 2H₂ → CH₄
Step 3: Stoichiometry
[tex]8 \ mol \ CH_4(\frac{2 \ mol \ H_2}{1 \ mol \ CH_4} )[/tex] = 16 mol H₂
Step 4: Check
We are given 1 sig fig. Follow sig fig rules.
16 mol H₂ ≈ 20 mol H₂
Value representing the number of protons in an atom
Answer:
6
Explanation:
What is the parent chain name of the hydrocarbon below?
a. methane
b. heptane
c. hexane
d. ethane
e. butane
Answer:
Option B. Heptane
Explanation:
To obtain the parent name of the above compound, all we need to do is to locate the longest continuous carbon chain.
The longest continuous carbon chain of the above compound is 7.
Next, we shall also consider the chain if there is any double or triple bond.
From the diagram given above, no double or triple bond is present.
Finally, the parent name of the compound is heptane since the longest continuous carbon chain is 7 and no double or triple bond is present in the compound.
1. As elements go across from left to right in a period,
they hold their electrons more tightly, because they
have more protons in the nucleus attracting the
orbitting electrons in the electron cloud. So across a
period, does atomic radius increase or decrease?
Answer:
decrease.
Explanation:
WHY? - As you go across a period, electrons are added to the same energy level. ... The concentration of more protons in the nucleus creates a "higher effective nuclear charge." In other words, there is a stronger force of attraction pulling the electrons closer to the nucleus resulting in a smaller atomic radius.