Answer:
134K
Explanation:
Using the ideal gas law equation;
PV = nRT
Where;
P = pressure (atm)
V = volume (Litres)
n = number of moles (mol)
R = gas constant (0.0821 Latm/Kmol)
T = temperature (K)
Based on the information provided, n = 1.4moles, P = 3.25atm, V = 4.738L, T = ?
3.25 × 4.738 = 1.4 × 0.0821 × T
15.3985 = 0.11494T
T = 15.3985/0.11494
T = 133.969
Approximately;
T = 134K
What is characteristic of an ionic bond?
Present Your Findings
1. Make a graph of the data collected.
a. Label the x-axis as time.
b. Label the y-axis as the number of undecayed atoms.
c. Be sure to title the graph.
d. Turn the graph into your teacher.
2. Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the
content of your paragraph.
a. What was your hypothesis? According to your data, do you think your hypothesis was correct?
b. What is a half-life?
c. When does a radioactive sample emit the largest number of decay particles? Why is this information important?
(How can it be applied in our world today?)
d. Do you think the shape of the curve on your graph would change if you increased the half-life to 20 seconds?
What does this reveal about radioactive decay?
e. Do you think the shape of the curve on your graph would change if you started with a smaller sample, say 50
atoms (pennies)? What does this reveal about radioactive decay?
Answer: To your project!!
Experiment Half-Life
a. My hypothesis is that when we get through 6 half-life’s you will be left with no atoms, and each time the atom number will decrease. Half of my hypothesis was correct whilst the numbers did decrease we, after 6 trials were left with one undecayed atom.
b.what is a half life?
the time required for the decay of one-half of the atoms in a sample of radioactive material
c. When does a radioactive sample emit the largest number of decay particles? when it first starts to decay
Why is this information important? Half-Life and decay is important today because it helps us determine the date of death and birth of ancient mummies.
d. Do you think the shape of the curve on your graph would change if you increased the half-life to 20 seconds? Yes different data would arise and that would change the graph.
What does this reveal about radioactive decay? The longer a material or substance takes to decay the larger the amount of decayed material or substance will come from the substance
e. Do you think the shape of the curve on your graph would change if you started with a smaller sample, say 50 atoms (pennies)? Yes, again different data would arise and that would change the graph.
What does this reveal about radioactive decay? The smaller the sample the quicker it will decay. And the less product that comes from the sample.
Your project is done, it worked for me hope it does for you? DON'T USE THE EXACT SAME WORDS IT'S SUS
here is the graph too!
Answer:
Hey I dont know if you got the same project as me but I had to record pennies and make a graph so I recorded pennys here
Explanation:
first half-life = tails 49 : heads 51
second half-life = tails 19 : heads 29
third half-life = tails 8 ; heads 11
fourth half-life = tails 2 ; heads 6
fifth half-life = tails 1 ; heads 1
sixth half-life = I didnt know what to say so I put 1
hope this helps someone
The plant on the left is growing more because it has been receiving more water
Answer:
uhhh well ig btw what plant
Explanation:
it would be more sunlight to
How many grams of sugar must be dissolved in 150 ML of water to make a solution that has a concern traction of .6 g/ml
Hey there!:
Density = 0.6 g/mL
Volume = 150 mL
Mass = ?
therefore:
D = m / V
0.6 = m / 150
m = 0.6 x 150
m = 90.0 g of sugar
Hope this helps!
Which of the following is a substance?
A. air
B. alloy
C. soil
D. seawater
E. carbon
Answer:
D
Explanation:
hope this helps
how to fix an i phone
Question 1 (2 points)
The higher the frequency of a wave, the lower the energy.
True
False
Answer:
False
Explanation:
There is a direct relationship between wave frequency and energy...
The higher the frequency, the higher the energy
alternatively, the lower the frequency, the lower the energy
Which compounds are organic?
Answer:
NaCI
Explanation:
Using just the valence electrons on each atom determine which 2 atoms should be in the same group?
atoms 1 and 2
atoms 3 and 4
atoms 2 and 3
O atoms 1 and 4
Answer:
Explanation:
Atom 1 and 4 because they have the same number of valence elctrons in its outermost shell
Find the mass of AlCl3 that is produced when 3.58 moles of Al2O3 react with excess HCl according to the following equation.
Al2O3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2O(l)
Moles of Al2O3, m = 3.58 moles.
We need to find the mass of AlCl3 produced.
Solution :
1 mole of Al2O3 produce 2 moles of AlCl3.
So, 3.58 moles of AlCl3 produce 7.16 moles of AlCl3.
Mass of AlCl3 produced is :
m = moles × molecular mass of AlCl3
m = 7.16 × 133.34 g
m = 954.714 g
Therefore, mass of AlCl3 produced is 954.714 g.
Hence, this is the required solution.
Plants use a process called photosynthesis to survive. What
evidence proves this process is a chemical change?
A. They turn green and change space
B. They get taller and change size
C. Water is needed
Glucose is created in the chloroplasts
Answer:
D
Explanation:
Glucose is produced through a process powered by sunlight that consumes Carbon Dioxide and produces oxygen as a waste product. In order for glucose to be produced, Carbon dioxide (a compound) must be, in essence, converted into a completely different chemical: dioxygen.
Photosynthesis is biochemical process by which green plants produce energy and release oxygen. Glucose is produced in this reaction and thus it is a chemical change. Thus, option D is correct.
What is a chemical change?The change in a substance if involves any bond making or bond breaking then it is called a chemical change. Whereas, if the substance just changes from one phase or state to the other it is called a physical change.
All chemical reactions are chemical changes involving bond making or breaking or both. Photosynthesis is a biochemical reaction takes place in plant leaves with the aid of light energy.
Photosynthesis involves several stages where an electron transport chain, various oxidising and reducing agents are performing significant roles.
The net reaction in photosynthesis is the combination of water and carbon monoxide to form molecular oxygen and glucose. Therefore, there occurs bond making and breaking. Thus option D is correct.
To find more about photosynthesis, refer the link below:
https://brainly.com/question/1757345
#SPJ2
How many atoms of oxygen (O) are represented in the chemical formula shown below?
2 CO2
4 atoms of oxygen
O 2 atoms of oxygen
1 atom of oxygen
6 atoms of oxygen
Answer:
4 atoms of oxygen
Explanation:
ANYONE PLEASE!!! MORE HELP ON THIS!!! all you have to do is say if it is ionic, binary, covalent or an acid. remember i give all my points to whoever is the most helpful!!!
11. N2S
12. SeF2
13. AsCl3
14. HClO
15. Be(OH)2
16. SO3
17. KMnO4
18. HClO4
19. Cu2S
20. BF3
21. H2SO4
22. CaI2
23. Pb3(PO4)2
24. HCH3COO
25. Ca(CH3COO)2
26. P2O5
27. BaCl2
28. K2SO4
29. Pb(ClO3)2
30. H3PO4
Answer:
21 is ionic aicid only one 1 know
When a lithium atom becomes ionized its new electron configuration is 4 points
the same as which element?
A. Ar
B. Mg
C. He
D. Fe
Answer:
C. He
Explanation:
When lithium is ionized, its new electronic configuration is the same as that of a helium atom.
Lithium is made up of 3 electrons with a configuration of:
2, 1
it has 1 electron in its outermost shell.
As a metal lithium will prefer to lose an electron due to its electropositivity.
On losing an electron, it will have 2 electrons remaining
Now, Helium has 2 electrons and this makes it similar to Lithium that has lost one electron.
This makes Lithium isoelectronic with Helium.
How do solar panels create an electric force field and generate an electric current?
Answer:
Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.
Answer:
Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.
Explanation:
hope this help
brainliest please!!!!
A snail takes 36 minutes to cross a highway. How many minutes would it take the snail to cross the same highway 7 times?
Answer:
252
Explanation:
7(36) = 252
50 Points! Will Mark Brainliest!
How do you find the mass in grams of one formula unit of a compound given all the atomic masses of every element in the compound?
Answer:
Explanation:
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.)
Answer:
The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.
Explanation:
What would happen if we couldn't carry respiration out?
Answer:
There would be no energy for cellular activities
Explanation:
Cellular respiration is the process whereby living organisms breakdown ingested food in their cells in order to obtain energy in form of ATP. In other words, respiration converts the stores energy in food molecules into usable energy by the cell. The general equation of the process is as follows:
C6H12O6 + 6O2 → 6CO2 + 6H2O
The process of cellular respiration is carried out by every living organism in order to obtain energy to perform their various metabolic activities. Hence, without RESPIRATION, there would be no energy (ATP) for use by the cell, which utterly means no cellular activities will take place.
Which reason explains why gas bubbles are released when a carbonated beverage is opened?
Which of the following molecules is not an exception of octet rule? *
(a) BF₃
(b) PF₅
(c) CO₂
(d) IF₇
POSS
Explain when gold is considered an element and when it is considered a solution.
Answer:
Gold is an element even when it is in a solution
6. Calculate the mass of an object that has a density of 19.3 g/mL and a volume of 100. mL. (Show Your Work)
7. Calculate the volume of an object that has a density of 7.8 g/mL and a mass of 500. G. (Show Your Work)
Answer:
6. mass=1930g
7.64.10ml
Explanation:
6. mass=density time volume
7.volume=mass divide by density
How many atoms of oxygen are in a molecule of glucose
(C6H12O6)
Answer:
6 oxygen atoms
Explanation:
Which of the following substances contains a covalent bond?
a. NaCl
b. SO2
C. CaO
d. MgCl2
Answer:
B. SO2
Explanation:
An Ionic bond transfurs electrons and occurs with metals and nonmetals
Covalent is the sharing of electrons and occurs with nonmetals only.
How do core electrons relate to the ionization energy of the atom?
Answer:
For any given element, ionization energy increases as subsequent electrons are removed. For example, the energy required to remove an electron from neutral chlorine is 1251 kJ/mol. ... An even sharper increase in ionization energy is witnessed when inner-shell, or core, electrons are removed.
Hope it helps :)
A cylinder at left with balls evenly spaced throughout the cylinder with an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answer:
deposition
Explanation:
Answer:
B
Explanation:
Molar mass
Please give me the answers and explain
Explanation:
The molar mass of a substance is the mass in grams of one mole of the substance. In a compound, add the atomic masses of the components.
HCl
Atomic mass of H = 1g/mol, Cl = 35.5g/mol
HCl = (1 + 35.5) = 36.5g/mol
ZnF₂
Atomic mass of Zn = 65.4g/mol, F = 19g/mol
ZnF₂ = 65.4 + 2(19) = 103.4g/mol
K₂CO₃
Atomic mass of K = 39, C = 12, O = 16
K₂CO₃ = 2(39) + 12 + 3(16) = 138g/mol
FePO₄
Atomic mass of Fe = 55.8, P = 31, 0 = 16
FePO₄ = 55.8 + 31 + 4(16) = 150.8g/mol
Cu₂S
Atomic mass of Cu = 63.5g/mol, S = 32
Cu₂S = 2(63.5) + 32 = 159g/mol
Each term in the series represents a sinusoidal component with a frequency of (kπ/4) and an amplitude of 4.
To express the given periodic signal x(t) in the form x(t) = ∑[k=0 to infinity] A_k cos(w_kt + ϕ_k),\
we can use the formula for the Fourier series representation of a periodic signal.
1. First, let's find the values of A_k, w_k, and ϕ_k using the given Fourier series coefficients.
The given coefficients are:
a_1 = a_-1* = j
a_5 = a_-5 = 2
Since x(t) is real-valued, the coefficients for negative frequencies (a_-k) are the complex conjugates of the coefficients for positive frequencies (a_k).
From the given coefficients, we can determine the values of A_k:
A_1 = a_1 + a_-1 = j + conj(j) = j - j = 0
A_5 = a_5 + a_-5 = 2 + conj(2) = 2 + 2 = 4
Since the fundamental period T is 8, the fundamental frequency is ω_0 = 2π/T = 2π/8 = π/4.
The values of w_k can be determined as:
w_0 = 0
w_k = k * w_0 = k * (π/4) for k ≠ 0
The values of ϕ_k can be determined as:
ϕ_0 = 0
ϕ_k = arg(a_k) for k ≠ 0
2. Now, let's express x(t) in the desired form using the determined values.
x(t) = A_0 cos(w_0t + ϕ_0) + ∑[k=1 to infinity] A_k cos(w_kt + ϕ_k)
Substituting the values we found:
x(t) = 0 cos(0t + 0) + ∑[k=1 to infinity] 4 cos((kπ/4)t + arg(a_k))
Simplifying:
x(t) = ∑[k=1 to infinity] 4 cos((kπ/4)t + arg(a_k))
This is the expression of x(t) in the desired form.
Remember that the series is infinite, so it includes all integer values of k.
learn more about sinusoidal from:
https://brainly.com/question/23757592
#SPJ11
SHOW ALL WORK! Partial
How many words can Jamie type in 2 days if she can type 62 words per minute?
1 day = 1440 minutes
2 days = 2880 minutes
2 days = 62 words per minute× 2880 minutes
2 days = 178560 words
Therefore she can type 178560 words in 2 days if she can type at 62 words per minutes
HELP PLS , CHEMISTRY
Answer:
N2H4
Explanation:
Find the mass of the empirical formula, which is 16.03 Take the formula mass and divide it by the empirical mass. This should give you an answer of 2 (well, 1.99 but it is close enough to a whole number to where you can just use 2). Multiply the subscripts of NH2. N has a subscript of 1, so now it will have a subscript of 2. H has a subscript of 2, so it will now have a subscript of 4. Therefore, your answer is N2H4.How many grams of sodium bicarbonate are in 1.8 x 1023 formula units?NaHCO3
anyone faaaaast please:(((((((((
Answer:
Mass = 25.2 g
Explanation:
Given data:
Number of formula units of NaHCO₃ = 1.8×10²³
Mass in gram = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ formula unit
1.8×10²³formula unit × 1mol / 6.022 × 10²³ formula unit
0.3 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.3 mol × 84 g/mol
Mass = 25.2 g