The student's questions involve calculations of moles, mass, and molecule amounts in various chemical compounds based on stoichiometric principles. The answers are given as a sorted list. Values should be verified with available molar masses.
Explanation:This student's questions relate to moles, mass, and molecule amounts in different chemical compounds, following the principles of
stoichiometry
. Here are the answers, calculated using the appropriate molar mass for each substance:
24.5 grams of CoF3 is approximately 0.294 moles.150.00 grams of Na2SO4 equates to about 1.12 x 1024 molecules.2.3 x 1024 atoms of sulfur is around 38.18 moles.7.40 x 1023 molecules of PH3 is about 61.12 grams.7.5 x 1023 molecules of H2SO4 is around 49.89 moles.As chemistry problems can be complex, please double-check these answers using your own molar masses.
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11) Solve b = g + (t – 1)w for t. *
What is the missing term? (10x-4x^2)-(7x+?)=3x-6x^2
The given problem is =
[tex]( 10x-4x^{2} )-(7x+?)=3x-6x^{2}[/tex]
Lets suppose the missing term to be T
So equation becomes:
[tex]10x-4x^{2} -7x-T=3x-6x^{2}[/tex]
[tex]T=10x-4x^{2} -7x-3x+6x^{2}[/tex]
[tex]T=2x^{2}[/tex]
Hence, the missing term is [tex]2x^{2}[/tex]
Consider the equation 3p – 7 + p = 13. What is the resulting equation after the first step in the solution?
Apply THe ORder of operations to simplify the expression
90/ [10+(3² - 4)]
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Belinda wants to buy 3 large boxes of oranges each box contains 4 bags of oranges and each bag has 10 oranges. How many oranges will she have?
How many quarters have the same value as 85 dimes?
If a memory cell whose address is 5 contains the value 8, what is the difference between writing the value 5 into cell number 6 and moving the contents of cell number 5 into cell number 6?
The required difference is value 5 is put in cell 6 and in the second case value of cell 5 is transferred to cell number 6.
Given that,
If a memory cell whose address is 5 contains the value 8, what is the difference between writing the value 5 into cell number 6 and moving the contents of cell number 5 into cell number 6 is to specify.
Functions is the relationship between sets of values. e g y=f(x), for every value of x there is its exists in set of y. x is the independent variable while Y is a dependent variable.
Here,
If a memory cell whose address is 5 contains the value 8
implies at cell number 5 the entry is 8
Similarly,
writing the value 5 into cell number 6
While in the case of moving the contents of cell number 5 into cell number 6, Implies 8 is transferred to cell number 6.
Thus, the required difference is value 5 is put in cell 6, and in the second case value of cell 5 is transferred to cell number 6.
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This figure shows the nose cone of a rocket used for launching satellites. The nose cone houses the satellite until the satellite is placed in orbit. What is the volume of the nose cone?
45 cubic feet
60 cubic feet
90 cubic feet
180 cubic feet
Thank you :)
Answer:
[tex]45\pi\ ft^3[/tex]
Step-by-step explanation:
The volume of the cone can be calculated using formula
[tex]V_{cone}=\dfrac{1}{3}\cdot \pi r^2\cdot H,[/tex]
where [tex]r[/tex] is the radius of the base circle and [tex]H[/tex] is the height of the cone.
Since [tex]r=3\ ft[/tex] (half of the diameter given in the diagram) and [tex]H=15\ ft,[/tex] then
[tex]V_{cone}=\dfrac{1}{3}\cdot \pi \cdot 3^2\cdot 15=45\pi\ ft^3.[/tex]
Choose the correct transformation of the graph f(x) = |x + 8| - 3.
The graph of f(x) = x| is shifted to the left 8 units, down 3 units.
The graph of f(x) = x| is shifted to the right 8 units, down 3 units.
The graph of f(x) = x| is shifted to the left 8 units, up 3 units.
The graph of f(x) = x| is shifted to the right 8 units, up 3 units.
Answer:
A. The graph of f(x) = |x| is shifted to the left 8 units, down 3 units.
Step-by-step explanation:
We are given,
The transformed function is [tex]f(x)=|x+8|-3[/tex].
Now, the parent function is [tex]f(x)=|x|[/tex].
So, we have,
When the parent function is shifted 8 units to the left, the function is [tex]|x+8|[/tex].
This function when translated 3 units downwards gives [tex]f(x)=|x+8|-3[/tex].
Thus, we get,
The parent function f(x)=|x| is translated 8 units to the left and 3 units downwards.So, option A is correct.
Leo is roller-blading at a speed of 200 meters per minute. How long will it take him to roller-blade 1 km?
Answer:
5 min
Step-by-step explanation:
(3a) ^ 3 =
This expression without exponents is 3aaa 3 • 3 • 3a 3a3a3a 3 • 3 • 3a 3
Answer: The correct option is (C) [tex]3a.3a.3a.[/tex]
Step-by-step explanation: We are given to select the correct representation of the following exponent expression :
[tex]E=(3a)^3.[/tex]
We will be using the following property of exponents :
[tex]a^n=a.a.a.~.~.~.~(n~times).[/tex]
So, for the given expression, we get
[tex]E=(3a)^3=3a.3a.3a.[/tex]
Thus, the correct representation is [tex]3a.3a.3a.[/tex]
Option (C) is CORRECT.
Dennis has 30 plums and 42 apricots. he wants to put the fruit in bag so that each bag has the same number of like fruit. how many pieces of fruit can he put in each bag
Solve.
Mr. Madison picked 80 pieces of fruit on Thursday.Add.
042412+ 4080Which number can each term of the equation be multiplied by to eliminate the decimals before solving? –m + 0.02 + 2.1m = –1.45 – 4.81m A)0.01
B)0.1
C)10
D)100
since the 2 in 0.02 is in the hundredths place, you need to multiply that by 100 to eliminate the decimal, then you would need to multiply the other numbers by 100 as well
Answer is D) 100
The decimals place in a number can be shifted right or left by multiplying or dividing by powers of 10 respectively
The option which gives the number that will multiply each term of the equation -m + 0.02 + 2.1·m = -1.45 - 4.81·m to eliminate the decimals before solving, is option D)
D) 100
Reason:
The given expression is presented as follows;
-m + 0.02 + 2.1·m = -1.45 - 4.81·m
The number that can multiply the terms to eliminate the decimals before solving
Solution;
The number of decimal places to which the coefficient and constant values are given = 2 decimal places
Therefore, to eliminate the decimal places, the decimal point of each term has to be moved two places to the right
To move decimal points to the right x number of places is given by multiplying the number by 10ˣ
Therefore, to move the decimal point two places to the right so as to eliminate the decimal point, by multiplicative property of equality, we have;
10² × (-m + 0.02 + 2.1·m) = 10² × (-1.45 - 4.81·m)
10² = 100, therefore, we have;
100 × (-m + 0.02 + 2.1·m) = 100 × (-1.45 - 4.81·m)
-100·m + 2 + 2,100·m = -145 - 481·m
Therefore, the number the equation, -m + 0.02 + 2.1·m = -1.45 - 4.81·m, is to be multiplied by is 100
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Find a Point-Slope equation for a line containing the given point and having the given slope. 1. (-4, 3), m = -12 2. (-15, 6), m = -3 3. (5, -2), m = -7 4. (3, -5), m = -2 5. (6, -2), m = -5 6. (-5, -2), m = -4 7. (7, 0), m = -3 8. (0, 9), m = -5 9. (5, 1), m = -10
The table below shows the price of rolls at a bakery. A baker’s dozen includes 13 rolls for the price of a dozen rolls. How much money is saved by buying a baker’s dozen instead of 13 individual rolls?
Answer:
0.60
Step-by-step explanation:
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Last month, Margo bought a tree that grows 2.5 cm each day. It was 5cm tall when she bought it and now it is 65 cm tall. Write an equation to determine the number of days Margo has owned the plant.
Given an int variable n that has been initialized to a positive value and, in addition, int variables k and total that have already been declared, use a do...while loop to compute the sum of the cubes of the first n whole numbers, and store this value in total. thus if n equals 4, your code should put 1*1*1 + 2*2*2 + 3*3*3 + 4*4*4 into total. use no variables other than n, k, and total.
Alvin’s age is two times Elga’s age. The sum of their age is 60. What is Elga’s age?
x = Elgas age
2x = Alvins age
x +2x = 60
3x =60
x = 60/3 = 20
Elga is 20 years old
Final answer:
By setting Elga's age as x and establishing an equation based on the given relationship and sum of their ages, we calculated Elga's age to be 20 years old.
Explanation:
To determine Elga's age, we will use the information given:
1. Alvin's age is two times Elga's age.
2. The sum of their ages is 60.
Let's define Elga's age as x. Then, Alvin's age would be 2x since it is two times Elga's age. The sum of their ages can be written as the following equation:
x + 2x = 60
This simplifies to 3x = 60. To find Elga's age, we divide both sides by 3:
3x / 3 = 60 / 3
x = 20
Therefore, Elga's age is 20 years old.
A restaurant offers a $12 dinner special that has 77 choices for an appetizer, 1010 choices for an entrée, and 44 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert?
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Is it possible to remove ten unit cubes from a 3 by 3 by 3 cube made from 27 unit cubes so that the surface area of the remaining solid is the same as the surface area of the original 3 by 3 by 3 cube? In how many different ways can this be done?
I removed all eight corners, leaving the total area unchanged.
I removed the central cube of the top surface obtaining an increase of the surface area with four units.
I removed one cube from the middle of an edge at the top (any of the four remaining) and I arrived at a figure with ten cubes less then the original one but with the same surface area.
https://nrich.maths.org/787/solutionThe cube can be removed from the top middle and from the center if a 3 by 3 by 3 cube is made from 27 unit cubes.
What is surface area?An object's surface area refers to the overall space that its surfaces occupy.
Given:
The dimensions of the cube are 3 by 3 by 3
Calculate the surface area of the cube as shown below,
Surface area = 6 × side²
Surface area = 6 × 3²
Surface area = 6 × 9
Surface area = 54
I eliminated each of the eight corners, leaving the entire space untouched.
I deleted the top surface's central cube to increase the surface area by four units.
I started with a shape that was ten cubes smaller than the original one but had the same surface area after removing one cube from the center of one of the top edges (any of the four still there).
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In the given right triangle, find the missing length to the nearest tenth.
How many different outcomes are possible when a nickel,a quarter and a penny are flipped at the came time? Solve by applying the counting principle
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Fatimah works two shifts per day at the pizza shop. During her storefront shift, she sells her pizzas at a rate of 6 pizzas per hour. During her delivery shift, she sells 20 pizzas per night. Write an equation in slope-intercept form that represents the number of pizzas that Fatimah sells in one day if she works x hours.
A-y=1/6x-20
B-y=20x+6
C-y=6x+20
D-y=-6x+20
A public park is in the shape of a triangle. the side of the park that forms the base of the triangle is 22 yd long and the area of the park is 7500 yd 2 what is the length of the side of the park that forms the height of the triangle
Chloe draws three parallelograms. In each figure, she measures a pair of angles, as shown.
What is a reasonable conjecture for Chloe to make by recognizing a pattern and using inductive reasoning?
In a parallelogram, all angles are supplementary.
In a parallelogram, consecutive angles are supplementary.
In a parallelogram, consecutive angles are congruent.
In a parallelogram, all angles are congruent
Three parallelograms. The angles of the first parallelogram are 35 degrees and 145 degrees. The angles of the second parallelogram are 38 degrees and 142 degrees. The angles of the third parallelogram are 51 degrees and 129 degrees.
Bonita is testing prototype model rocket engines. To be considered a successful launch, the rocket must reach a height of at least 24 ft and must go a horizontal distance of no more than 10 ft. The vertical height must be at least three times as high as the horizontal distance. No rocket should go higher than 33 ft.
The graph shows the feasible region, where x represents the horizontal distance and y represents the vertical distance.
Which ordered pairs meet all the constraints for a successful launch and make sense in context of the situation?
Select each correct answer.
1. (4, 36)
2. (0, 33)
3. (4.8, 30.5)
4. (2, 22)
5. (9, 26)
he value of an autographed baseball from 2017 is $300. The value of the baseball exponentially increases by 5% each year after 2017. Write a one-variable inequality that could be used to solve for the number of years, x, it would take for the baseball to be worth at least $650. Do not use any dollar signs in the inequality. Write the inequality in standard form.
Answer:
[tex]300(1.05)^x\geq 650[/tex]
Step-by-step explanation:
Since, the initial value of the basketball = $ 300
Annual rate of interest = 5 %
Let the basket ball after x years is worth at least $ 650,
⇒ The cost of basketball after x years ≥ 650
[tex]\implies 300(1+\frac{5}{100})^x\geq 650[/tex]
[tex]\implies 300(1+0.05)^x\geq 650[/tex]
[tex]\implies 300(1.05)^x \geq 650[/tex]
Which is the required inequity.
Difference of two exponential random variables
Difference of two exponential random variables
I’m Still stuck someone help ?!
angle y = arcos(2.25/6)
= 67.97 degrees
round to 68 degrees
68 is less than 75 so it is not safe to use