Answer:
Air at sea level
Explanation:
sry If Im wrong
A UNKNOWN metal displaces alumiun from a solution but does not displace sodium. using actvity series, determine unknown metal
Explanation:
k
na→cannot displaceca
mg
al→can displacezn
fe
sn
pb
h
cu
hg
ag
pt
au
the answer is calcium or magnesium
because that metal's activity will be higher than al and
lower than Na. so that the metal will be ca or mg.
Which is a process that converts sunlight energy into a compound that stores chemical energy?
phototropism
phototropism
photosynthesis
photosynthesis
respiration
respiration
pollination
pollination
Research more Respiration
HELP ASAP!!!!!
Based on what you learned from the Reproduction and Energy article, why do you think this happens? You can review the article again (located in your Digital Resources) to be more sure about your response.
Reproduction is an energy requiring process as new organisms are produced from parents.
What is reproduction?Reproduction is the process by which living organisms produce young ones of their own kind.
Reproduction can either be by;
se-xual reproduction orase_xual reproductionReproduction is an energy consuming process.
Energy is required for cell division and for building up new news in the new organism.
Therefore, during reproduction, energy is required.
Learn more about reproduction at: https://brainly.com/question/16331915
3. Would you expect your experimental results would change if a different gas, such as CO2, were used instead of air? Explain your answer.
The experimental results would change if a different gas, such as CO₂, were used instead of air.
What is Air?This comprises of gases that form the atmosphere and they include:
78.08% nitrogen20.95% oxygen0.93% argon0.04% carbon dioxide, and small amounts of other gases.Due to the presence of other gases in air, there would be a change in experimental results.
Read more about Air here https://brainly.com/question/636295
Describe the composition of humus and why it is an effective organic fertilizer.
Answer:
In classical soil science, humus is the fraction of soil organic matter that is amorphous and without the "cellular cake structure characteristic of plants
Explanation:
anyways were r we going 2 talk?
and wut did i miss?
Answer the following questions about the mechanism for the acid-catalyzed hydration of an alkene:
a. How many transition states are there?
b. How many intermediates are there?
c. Which step in the forward direction has the smallest rate constant?
Answer:
a) there are three transition states
b) there are two intermediates; carbocation and protonated alcohol
c) The first step in the forward direction
Explanation:
The acid-catalysed hydration of alkenes proceeds via a carbocation mechanism.
Three transition states can be identified in this mechanism for the acid-catalyzed hydration of alkenes.
The three transition states are derived from the three steps in the reaction sequence:
1) Protonation of the alkene by hydronium ion
2) Addition of water to the carbocation
3) loss of a proton to yield the alcohol
The first step involves the breaking of a pi bond, hence it is a slow step hence it has the smallest rate constant. The other two steps are fast steps.
Thomas performed an experiment to measure the temperature of water as he heated it on a hotplate. At the end of his experiment, he plotted the results as shown in the graph below.
Pls I need this
Answer: I think it's C.
Explanation: I can't explain
Answer:
I thought A not C
Explanation:
But ill double check
BALANCING EQUATION
O XCiz(aq) +
O AgNO3(aq)
X(NO3)2(aq) + O Agci(s)
DONE
7:05 PROGRESS: 14%
XE
equation on the wall display.
WE button when you think you
Answer:
i think it would be
Explanation:
What is the unit rate of the better deal? (Number answers only.)
LaTeX: \frac{160\:miles}{5\:gallons}\:or\:\frac{315\:miles}{9\:gallons}160 m i l e s 5 g a l l o n s o r 315 m i l e s 9 g a l l o n s
The better deal has a unit rate of [m] miles per gallon.
What is true about asteroids
Answer:
They are big rocks that fly through space and are made of most commonly chondrite. When they collide, they collide with such force that they create craters on places like the moon.
HELP I don't understand anything !!!!!
Answer:
-I dont have a calculator on me but I can explain to you how to do it and you can put it in your calculator
Explanation:
-First you have to balance the equation because its not balanced
4Na+2H2O —-> 4NaOH
-After you balance it you have to add up the grams of H2 gas,
-The mass of each element is measured in grams
- You find how many grams each element it by looking at the periodic table and looking at the number at the bottom, thats called the mass
- Afterward if the element mass you are looking for has a small number as its subscript, that means there is more than one, so you must add them together to get the correct amount of grams it has
1+1=2grams
-After that, you take that and convert it to moles
2grams x 1mole/(6.02^23)grams = (unknown) moles
-And finally you convert that answer from moles to liters
(Unknown) moles x 22.4 Liters / 1 mole = FINAL ANSWER
I hope this was helpful, I tried to break it down the best I could for you <3
How many grams are in 0.55 moles of C6H10S?
Answer:
62.7 gram
Explanation:
Molar mass = (6)(12)+(10)(1)+(1)(32)=114 g/mol
Mass = no of moles × molar mass
= 0.55 × 114 = 62.7 gram
The mass of 0.55 moles of compound C₆H₁₀S is equal to 62.7 g.
What is a mole?A mole is defined as a standard unit that is used to find a huge number of quantities such as atoms, molecules, ions, or other particles. The mass of the 1 mole of any chemical element is equal to the atomic mass of the element and that of any chemical compound is known as molar mass.
The number of entities in 1 mole was found to be equal to 6.023 × 10²³ which is known as Avogadro’s number or Avogadro's constant
Given, the number of moles of the given compound = 0.55 moles
The mass of 1 mole of given compound C₆H₁₀S = 114 g/mol
The mass of 0.350 moles of the given compound = 0.55 × 114 = 62.7 g
Therefore, 62.7 grams is the mass of 0.55 moles of C₆H₁₀S.
Learn more about mole, here:
brainly.com/question/26416088
#SPJ2
You are going to standardize your sodium hydroxide by titrating with potassium hydrogen phthalate. As an example, you dissolve 0.3365 g of potassium hydrogen phthalate, otherwise known as KHP (KHC8H4O4) in water in a 250.0 mL Erlenmeyer flask and then add phenolphthalein indicator. You then titrate with your sodium hydroxide solution, which is in a buret, and you determine that the equivalence point is at 12.44 mL of your sodium hydroxide solution. Determine the molarity of your sodium hydroxide solution. What color will the solution of potassium hydrogen phthalate turn to determine when the equivalence point has been reached
Answer:
0.13 M
Explanation:
The reaction equation is;
NaOH(aq) + KHC8H4O4(aq) ------> KNaC8H4O4(aq) + H2O(l)
Molar mass of KHP = 204.22 g/mol
Amount of KHP= mass/ molar mass = 0.3365 g/204.22 g/mol = 1.65 × 10^-3 moles
n= CV
Where;
C= concentration
V= volume in dm^3
n= number of moles
C= n/V = 1.65 × 10^-3 moles × 1000/250 = 6.6 × 10^-3 M
If 1 mole of KHP reacts with 1 mole of NaOH
1.65 × 10^-3 moles of KHP will react with 1.65 × 10^-3 moles of NaOH
From
n= CV
We have that only 12.44 ml of NaOH reacted
C= n/V = 1.65 × 10^-3 moles × 1000/12.44
C= 0.13 M
At the equivalence point, the KHP solution turned light pink.
The mass of a block is 12 g and the volume is 6 ml. Calculate the density of the block.
Question 2 options:
18 g/ml
72 g/ml
0.5 g/ml
2 g/ml
Answer:
According to mass and volume, block density is 2 g/ml
Explanation:
Density is a measure, usually used in physics and chemistry, that relates the mass and volume of a solid or compound.
In general terms, the density is directly proportional to the mass, and inversely proportional to the volume, so increasing the mass will also increase the density.
The formula used to calculate the density is
ρ = [tex]\frac{m}{V}[/tex]
Therefore, according to the mass and density of the block
ρ = [tex]\frac{12}{6}[/tex] = 2g/ml
Being the density of the block equal to 2 g/ml.
The other options are not possible, because the values given do not correspond to the result of the equation.
3. Calculate the average atomic mass for the sample of atoms shown below.
Cu-63
Cu-65
A. 63.50 u
B. 63.75 u
C. 64.25 u
D. 64.50 u
Answer:B:63.75
Explanation:(5/8 x 63)+(3/8 x 65)=(0.625 x 63)+(0.375 x 65)=63.75
Producer gas has the following composition by volume: O2 . The oxygen fed from the air and the producer gas is 20% in excess of 68.0 1.2507 2CO + O2 2CO2 The oxygen is from the air whose volumetric composition is assumed to be 80% N2 % Density, kg/m3 The gas is burned with oxygen according to the following equation: CO2 3.5 1.9768 the amount required for complete combustion. The combustion is 98% complete. N2 CO 28.0 1.2501 0.5 1.4289 and 20% O2 Carry out total material balance for this process based on 100kg of gas burned.
Answer:
ANSWER: (a) 6.93 m3 (b) 54.286 m3 (c) 20.45% CO2, 1.3496 02, 78.21% N2
Explanation:
mark me as a brain list
What trend does electronegativity follow, going down the periodic table?
Answer: Decreases
Explanation: Electronegativity decreases because the valence electrons are farther from the nucleus.
Dinitrogen oxide has _____.
Answer:
Nitrogen is the answer my good sir.
Explanation:
What are the main reasons we cannot power the earth with 100% of renewable energy? Explain what can be done, or needs to be done to eventually achieve this goal.
Help me please lol TwT
Answer:
the number one reason we cannot power the Earth with 100% renewable energy is because our dependence on nonrenewable energy(fossil fuels)...,but with technological advances in solar energy and the latest innovation in biofuels I wouldn't be surprised if we (humans) are powering our electronics with simply the steps we take in our daily routine.
How many electrons do two ethylene monomers () share to form a covalent bond?
Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.
Its 2
Answer:
2 would be the amount to form a covalent bond
A solution of a weak acid was tested with the following indicators and the colors noted: Methyl Violet - violet Thymol Blue - yellow Methyl Yellow - yellow Congo Red - orange Bromcresol green - green What is the approximate pH of the solution
pH ranges depending on the solution, for a solution with weak acid pH will be between 4.0-7.0.
What is pH?pH is helps to determine if a solution is acidic or basic in nature.
A pH meter is the instrument that can be used for the measurements.
Methyl orange is used when titrating a strong acid against a weak base.
Therefore, the pH of the solution which is a weak acid will be between 4.0-7.0.
Learn more on pH level here,
https://brainly.com/question/4137247
HEY I NEED A ANSWER RIGHT NOW IT'S MISSING AND MY TEACHER ARE GRADING THEM NOW YOU WILL BE MARKED BRAINIEST
Answer:
56.6 g Fe2O3
Explanation:
Balanced equation is given by
[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]
On both sides
Fe=4O=6Hence balanced
Now
3mols of O_2 produces 2 mol Fe_2O_31 mol O_2 produces 2/3=0.6mol Fe_2O_3Moles of O_2:-
17/32= 0.5molMoles of Fe_2O_3;
0.5(0.6)=0.3molMass of Fe_2O_3:-
Moles (Molar mass)159.7(0.3)=47.91gwhat is the electron configuration for S-
Answer:
The Electron Configuration for Sulfur(S)= 1s^2 2s^2 2p^6 3s^2 3p^4
Explanation:
Use the sheet attached to help with a future question. (Hint: Follow the red lines). The atomic number will be equal to the number of powers raised.
Hydrogen gas and solid gold(III) sulfide are reacted. Pure solid gold metal is formed and gaseous hydrogen sulfide is released. Correctly identify the reactants and products:reactants:
a. solid gold, gaseous hydrogen sulfideproducts: hydrogen gas, solid gold(III)
b. sulfidereactants: solid gold, solid gold(III) sulfideproducts: hydrogen gas, gaseous
c. hydrogen sulfidereactants: hydrogen gas, solid gold, gaseousproducts: hydrogen sulfide
d. solid gold(III) sulfidereactants: hydrogen gas, solid gold(III)
e. sulfide products: solid gold, gaseous hydrogen sulfide
The reactants of the reaction will be solid gold (III) sulfide and hydrogen gas, while the products will be pure solid gold and hydrogen sulfide gas.
Chemical reactionsReactants react together during reactions to arrive at products.
In this case, solid gold (III) sulfide and hydrogen gas react according to the following equation:
[tex]Au_2S_3(s) + 3 H_2 (g)-- > 2 Au(s) + 3H_2S(g)[/tex]
Reactants = solid gold (III) sulfide, hydrogen gas
Products: pure solid gold, hydrogen sulfide gas
More on chemical reactions can be found here: https://brainly.com/question/1689737
If a car with a mass of 4000 kg is accelerating at a rate of 2 ms and hits a tree what force does it have?
Answer:
8000
Explanation:
it wil be twice the amount of the cars weight
Which of the following is true about daughter cells?
The following questions pertain to a 0.50 M solution of HOCl at 25℃. pKa = 7.46 at 25℃. a. Find the concentration of all species present in the solution at equilibrium. b. Find the pH of the solution. c. Identify the strongest base in this system.
The abbreviated electron configuration for the lead (IV) ion is?
Answer: I THINK THIS IS THE ONE...
Explanation: This means “the configuration of xenon plus 6s2 4f14 5d10 6p2.”
how many protons does the bohr model have for helium?
Answer:
2 protons per atom of Helium
Explanation:
The number of proton in a given element is given by its place on the periodic table which is for He 2 protons b/c the atomic number for He is 2.
Other Examples:
Hydrogen (H-1) or Protium has 1 proton b/c its atomic number is 1.
Magnesium (Mg-24) has 24 protons b/c its atomic number is 24.
Lead (Pb-207) has 82 protons b/c its atomic number is 82.
Uranium (U-238) has 92 protons b/c its atomic number is 92.
The periodic table order of arrangement of elements is based upon 'The Periodic Law'. => The chemical and physical properties of the elements is a periodic function of atomic numbers, or number of protons in the nucleus.
The part of the screen where you write or place code is called the _____.
Answer:
screenwriting
Explanation:
Answer:
the editor <3
Explanation:
What is the equivalent mass of 2 moles of oxygen
Answer:
32 g
Explanation:
the molar mass of oxygen is 16 g
if it's asking o2 then 64