Answer:
examples of type of matter that circulate through the environment are carbon, nitrogen, and water
balance FeCl3 + MgO ---> Fe2O3 + MgCl2
Answer: The balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]
Explanation:
The given reaction equation is as follows.
[tex]FeCl_{3} + MgO \rightarrow Fe_{2}O_{3} + MgCl_{2}[/tex]
Here, number of atoms present on reactant side are as follows.
Fe = 1Cl = 3Mg = 1O = 1Number of atoms on product side are as follows.
Fe = 2Cl = 2Mg = 1O = 3To balance this equation, multiply [tex]FeCl_{3}[/tex] by 2 and MgO by 3 on reactant side. Also, multiply [tex]MgCl_{2}[/tex] by 3 on product side. Therefore, the equation can be rewritten as follows.
[tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]
Hence, number of atoms on reactant side are as follows.
Fe = 2Cl = 6Mg = 3O = 3Number of atoms on product side are as follows.
Fe = 2Cl = 6Mg = 3O = 3Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that the balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex].
Calculate the average reading for all three trials for both the wet bulb and dry bulb thermometers. Convert the average
temperatures for both thermometers to Celsius using this formula:
(°F - 32) = °C.
Answer: °32= 0 °C.
Explanation:
Answer:
Explanation:
Please add the temperature readings from all three trials for both thermometers. Will do the calculation with readings.
Can someone help with question 16?
ASAP
1. carbon lies in the 2nd period where silicon in the third period.
2. carbon is a non metal whereas silicon is a metalloid.
3. there are only 3 isotopes of carbon and 23 isotopes of silicon
4. size of silicon atom is larger
5. silicon is heavier than carbon.
Please help me with this homework
Answer:
The answer is C density.
In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. CO2; malate CO2; succinyl-SCoA ADP; oxaloacetate ADP; succinyl-SCoA CO2; oxaloacetate
Answer:
CO2; succinyl-SCoA
Explanation:
Citric acid cycle, also called Krebs cycle is the second stage of aerobic cellular respiration, which occurs in the mitochondrion. The kreb's cycle is made up of 7 distinct steps, with each involving series of enzymatic reactions.
According to this question, step 3 and 4 of the citric acid cycle involves an oxidation and decarboxylation reaction to produce 2 molecules of carbon dioxide (CO2) and a 4-carbon compound called succinyl group. A coenzyme A binds to the succinyl group to form succinyl-SCoA.
Why does the earth rotate
A:because it’s formed from cold gases collapsing due to gravity
B: Because the matter in the nebula that formed
C:Because the earth form is more than 99% of the mass of the Solar system
D; Because the hydrogen Adams inside the nebular fuse to form helium
Answer:
A
Explanation:
Your answer would be A because Earth is formed from cold gases collapsing due to gravity. The Solar System was formed when a huge amount of dust and gas began to collapse under its own gravity, and as the cloud collapse it started to spin causing the material within the cloud to gather into a swirl and then formed into planets and as the planets are formed they kept this spinning motion.
0.225L solution of H2CO3 is neutralized by 0.0880L of a 1.22 M Fe(OH)3 solution. What
is the concentration of the H2CO3 solution?
Answer:
0.716
Explanation:
First, write the balanced equation:
3 H2CO3 + 2 Fe(OH)3 ----> Fe2(CO3)3 + 6 H2O
Second, go from the molarity of H2CO3 to liters of Fe(OH)3
(Pull mole ratio from balanced equation)
1.22/1L x 0.0880/1 x 3molH2CO3/2molFe(OH)3 x 1/0.225L
Use calculator, and you end up with 0.7157333
Round to 0.716
The table below shows the height of a ball x seconds after being kicked.
A 2-column table with 5 rows. The first column is labeled time (seconds) with entries 0, 0.5, 1, 1.5, 2, 2.5, 3. The second column is labeled height (feet) with entries 0, 35, 65, 85, 95, 100, 95.
What values, rounded to the nearest whole number, complete the quadratic regression equation that models the data?
f(x) =
x2 +
x + 0
Based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?
feet
Answer:
-16
81
19
Explanation:
The quadratic regression equation is [tex]y = -16x^2 +81x[/tex], and the estimated height in 0.25 seconds is 19 feet
What are regression equations?Regression equations are used to determine the relationship between sets of data
The dataset is given as:
Time (seconds) Height (feet)
0 0
0.5 35
1 65
1.5 85
2 95
2.5 100
3 95
To determine the quadratic regression equation, we make use of a graphing calculator.
From the graphing calculator, we have the following calculation summary:
a = -16.429
b = 81.071
c = -0.357
A quadratic regression equation, is represented as:
[tex]y = ax^2 + bx + c[/tex]
So, we have:
[tex]y = -16.429x^2 +81.071x -0.357[/tex]
Approximate
[tex]y = -16x^2 +81x[/tex]
The estimated height in 0.25 seconds is:
[tex]y = -16* 0.25^2 +81 * 0.25[/tex]
[tex]y = 19.25\\[/tex]
Approximate
[tex]y = 19[/tex]
Hence, the estimated height in 0.25 seconds is 19 feet
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A 33.05 g sample of a substance is initially at 28.5 °C. After absorbing 2589 J of heat, the temperature of the substance is 107.9 'C.
What is the specific heat (c) of the substance?
Answer:
[tex]0.985\ \text{J/g}^{\circ}\text{C}[/tex]
Explanation:
m = Mass of sample = 33.05 g
[tex]\Delta T[/tex] = Change in temperature = [tex]107.9-28.5=79.5^{\circ}\text{C}[/tex]
Q = Heat absorbed = 2589 J
c = Specific heat of substance
Heat is given by
[tex]Q=mc\Delta T\\\Rightarrow c=\dfrac{Q}{m\Delta T}\\\Rightarrow c=\dfrac{2589}{33.05\times 79.5}\\\Rightarrow c=0.985\ \text{J/g}^{\circ}\text{C}[/tex]
The specific heat of the substance is [tex]0.985\ \text{J/g}^{\circ}\text{C}[/tex].
A container has a volume of 2.79 L and a pressure of 5.97 atm. If the pressure changes to 1460 mm Hg, what is the container’s new volume?
Answer:
8.68 L is the new volume
Explanation:
You use Boyle's law for this.
[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]
[tex]P_{1}[/tex] = first pressure
[tex]P_{2}[/tex] = second pressure
[tex]V_{1}[/tex] = first volume
[tex]V_{2}[/tex] = second volume
Convert pressure from atm to mmHg (use same units):
5.97 x 760 = 4537.2 -> 4.54 x 10³
...maintain 3 significant figures in calculation, and round as needed...
(4.54 x 10³ mmHg)(2.79 L) = (1460 mmHg)([tex]V_{2}[/tex])
(4.54 x 10³ mmHg)(2.79 L) / (1460 mmHg) = [tex]V_{2}[/tex] = 8.68 L
Hope this helps :)
Please help me with number 43
Answer:
The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes
Explanation:
what is the percentage of oxygen in air
ASAP...
Explanation:
21 % of oxygen is present in air .
hope it is helpful to you
5. What is the difference between a reflected and a diffracted sound wave?
A. A reflected sound wave is absorbed by the medium. A diffracted sound wave changes
direction as it passes through an opening.
B. A diffracted sound wave bounces back to the place of origin. A reflected sound wave is
absorbed as it passes through an opening.
C. A reflected sound wave bounces back to the place of origin. A diffracted sound wave
changes direction as it passes through an opening.
D. A diffracted sound wave bounces back to the place of origin. A reflected sound wave
changes direction as it passes through an opening.
Answer:
Reflection involves a change in direction of waves when they bounce off a barrier; refraction of waves involves a change in the direction of waves as they pass from one medium to another; and diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path.
Explanation:
https://www.physicsclassroom.com/class/waves/Lesson-3/Reflection,-Refraction,-and-Diffraction#:~:text=Diffraction%20of%20Waves-,Reflection%20involves%20a%20change%20in%20direction%20of%20waves%20when%20they,a%20barrier%20in%20their%20path.
Reflection of sound wave differs from diffraction of sound wave in that a reflected sound wave bounces back to the place of origin while a diffracted sound wave changes direction as it passes through an opening.
What is reflection?Reflection is the bouncing back of a wave when it hits an obstacle along its path.
What is diffraction?Diffraction is the spreading out of a wave in a circular path as it passes through a tiny opening.
Therefore, the difference between reflection and diffraction is that a reflected sound wave bounces back to the place of origin while a diffracted sound wave changes direction as it passes through an opening.
Learn more about reflection and diffraction at: https://brainly.com/question/11176463
3.2 moles of CO 2 is how many atoms of CO2
3. If a gas has a pressure of 32.1 psi at a temperature of 25°C, then what is the new pressure if the temperature is increased to 75°C?
Answer: 37.485 psi
Explanation: using the gas law and assuming that volume is constant due to nor being stated we use the formula
P1/T1=P2/T2
Note that the tempreture should be changed from °C to K by adding 273
What would make oppositely charged objects attract each other more?
increasing the positive charge of the positively charged object and increasing the negative charge of the
negatively charged object
decreasing the positive charge of the positively charged object and decreasing the negative charge of the
negatively charged object
increasing the distance between the positively charged object and the negatively charged object
maintaining the distance between the positively charged object and the negatively charged object
Answer:
a: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
Explanation:
The oppositely charged objects attract each other more is option a. It increased the positive charge and the negative charge.
The Attraction of the oppositely charged:At the time when the oppositely charged objects are attracted to each other more so here the positive charge should be increased with respect to the positive charge object and the negative charge is increased with respect to the negative charge object
Hence, the first option is correct.
Learn more about an object here: brainly.com/question/19587294
Which of the following is NOT evidence that whales and dolphins changed over time and once lived on land?
a. They have lungs
b. They have arm bones that look like those bones of land qwelling organisms.
c. They have small hairs.
d. They do not have hair.
Answer:
Am not so sure but I think that your ans is a
Answer:
D.
Explanation:
Because that's what every mammal has that lives on land. (Whales and dolphins are mammals)
You finally earn your drivers license and are extremely excited to start driving! It is the middle of winter and all 4 tires on your car look like the air level is low. After checking for air leaks you have found none. The last time you filled the tires was summer. What is the reason for the low pressure?
Answer: Tires air condenses and when it condenses it takes up less room.
Explanation: Hope that helps!
DIRECTIONS: Classify the following unbalanced chemical equations according to the six types
of chemical reactions. Write your answer on the space provided for each number.
1. NaOH + KNO3 NaNO3 + KOH
2. CH4 + O2 CO2 + 2H2O
3. Fe + NaBr FeBr3 + Na
4. CaSO4 + Mg(OH)2 Ca(OH)2 + MgSO4
5. NH4OH + HBr H2O + NH4Br
6. P4 + O2 P2O4
7. NaNO3 NaNO2 + O2
8. C18H18 + O2 CO2 + H2O
9. H2SO4 + NaOH NaSO4 +H2O
10.NiSO4 + Li3PO4 Ni3(PO4)2 + Li2SO4
A beach ball with a volume of 12.0 L and an initial temperature of 32.0 oC is cooled to -73.0 oC, what is its final volume?
Answer:
-57.12
Explanation:
i used a calculator :)
Answer:
-73
Explanation:
12.0+32.0=44-73.0=-73
Hello ! Pls help, i'm really confused T-T 29.0 grams of H2CO3 are dissolved in enough water to make 700.0 mL of solution. A. 0.468 L B. 0.468 moles/liter C. 62.02 g/mole D. 0.668 L E. 0.668 M
Answer:
Explanation:
Molecular weight of H₂CO₃ = 2 + 12 + 48 = 62
29 g of H₂CO₃ = 29 / 62 moles
= .4677 moles
.4677 moles are dissolved in .7 L
molarity of solution = .4677 / .7
= .668 M .
So solution formed is .668 M .
Option E is correct .
What type of circuit is shown in the diagram below?
Answer:
Its a simple SERIES circuit
Explanation:
Only producers are able to capture energy from the sun and the matter from the environment to make food.How does energy that come from the sun get to every other organism?How does matter from the environment enter every other organism?
Answer:
Explanation:
Plants get energy from sunlight to produce carbohydrates. When a consumer such as herbivore consume plants, he gets energy and when a canivore or omnivore consume the primary consumer, energy is also transfered to them and this is called food chain.
Matter from the environment which include fallen leaves or trees will decompose after a while in the ground when decomposers begin to act on it and it will eventually give them energy. Decomposer help break down organic matter such as leaves,dead animals and get little amount of of energy in the energy flow pyramid
HEELLLP
How many liters of hydrogen gas, at STP, are required to produce 2.50 x 1022 molecules of CH4? C + 2H2 → CH4
Answer:
1.8 L
Explanation:
According to Avogadro;
1 mole of CH4 contains 6.02 * 10^23 molecules of CH4
x moles of CH4 contains 2.50 x 10^22 molecules of CH4
x = 1 * 2.50 x 10^22 molecules/ 6.02 * 10^23 molecules
x = 0.04 moles of CH4
2 moles of H2 yields 1 mole of CH4 gas
x moles of H2 gas yields 0.04 moles of CH4
x = 2 moles * 0.04 moles / 1mole = 0.08 moles of H2
x = 0.08 moles of H2
Since 1 mole of H2 occupies 22.4 L
0.08 moles of H2 occupies 0.08 moles * 22.4 L/ 1 mole
= 1.8 L
Can someone help me
Answer:
Its refraction
Explanation:
becuase refraction is the change in direction of a wave passing from one medium to another, where the straw appears to be split apart because of the waters direction.
PLEASE HELP ASAP!!
57. Sodium sulfate is used in the manufacture of detergents.
a. Identify each of the component elements of sodium sulfate, and write the compound's chemical formula.
b. Identify the compound as ionic or covalent.
c. Calculate the percent by mass of each element in sodium sulfate.
Answer:
See Explanation
Explanation:
The formula of sodium sulphate is Na2SO4. The component atoms in the compound are; sodium, sulphur and oxygen.
The compound is ionic. it is composed of sodium ions and sulphate ions.
The molar mass of sodium sulphate = 142 g/mol
percentage by mass of sodium = 2* 23/142 * 100 = 32.39 %
percentage by mass of sulphur = 32/142 * 100 = 22.5%
percentage by mass of oxygen = 4 * 16/142 * 100 = 45.1 %
Can someone help on this question.
Help asap plzzzz 30 points
A chemistry teacher provides students with the amount of potassium hydroxide they need in solution form. The teacher makes the solution by dissolving 42.1 g KOH into 3.0 L of solution.
Each lab group needs 0.023 mol of KOH for their experiment. How many milliliters of the solution does each group need to provide enough dissolved moles?
mL of solution
Answer:
Do you need your 0.00 2 oz
Explanation:
Because that is the right answer
For the enough dissolving of given moles each group will need to provide 92mL of solution.
How we determine Molarity for further calculation?Molarity can be calculated as: M = n/V mol/L where,
V = volume = 3L (given)
n = no. of moles, which can be calculated as:
n = W/M, where
W = given mass = 42.1g (given)
M = molar mass = 56.1g/mol (known)
First of all we have to calculate molarity to determine the volume of solution of each groups. By putting value of n in the 1st equation, molarity can be calculated as follow:
M = 42.1 / 56.1 × 3 = 0.250 mol/L
Now in the question it is given that each group have KOH solution of 0.023 moles. So, we can calculate the volume by using the 1st equation:
M = n/V
0.250 = 0.023/V
V = 0.023mol / 0.250mol per L = 0.092L = 92mL.
Hence, 92mL of the solution will each group need to provide enough dissolved moles
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Select the correct structure that
corresponds to the name.
2,2-dimethyl-3-hexyne
A. CH3CH2C=CC(CH3)3
B. CH3CH(CH3)C = CCH(CH3)2
C. both
Answer: A
Explanation:
The correct structure of the name of the compound given is CH₃CH₂C=CC (CH₃)₃.
What is 2,2-dimethyl- 3- hexyne?Dimethyl hexyne is an organic compound. Its chemical formula is C8H14. The compound hexyne is used to make a complex compound, agrochemical, and pharmaceutical compounds.
Thus, the correct option is A, CH₃CH₂C=CC (CH₃)₃.
Learn more about 2,2-dimethyl- 3- hexyne
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What is the right answer to these questions?
