You are given a 1.41-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 135 mL of water then add an excess of 0.542 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The white solid has a mass of 1.464 g.
a. If you had an extremely magnified view of the solution (to the atomic-molecular level), list the species you would see (include charges, if any).
b. Write the balanced net ionic equation for the reaction that produces the solid. Include phases and charges.
c. Calculate the percent sodium chloride in the original unknown mixture.
Answers
a. If we had an extremely magnified view of the solution, to the atomic-molecular level, the following species would be observed (including charges, if any) :2 Na+, NO3-, Ag+, and Cl-.b. The balanced net ionic equation for the reaction that produces the solid is: Ag+ + Cl- → AgCl↓c. Calculate the percent sodium chloride in the original unknown mixture:
1. Calculate the amount of AgCl precipitated. According to the balanced chemical reaction, 1 mol of AgNO3 reacts with 1 mol of NaCl to produce 1 mol of AgCl. A 0.542 M AgNO3 solution contains 0.542 mol/L of AgNO3.0.542 mol/L × 0.135 L = 0.07317 mol AgNO3 reacted with NaCl.0.07317 mol AgNO3 × (1 mol NaCl / 1 mol AgNO3)
= 0.07317 mol NaCl precipitated.2. Calculate the number of moles of NaCl and NaNO3 in the original sample.Mass of sample = 1.41 gMass of AgCl produced = 1.464 g Subtracting the mass of AgCl from the mass of the sample gives us the mass of NaCl and NaNO3 in the original sample:
Mass of NaCl and NaNO3 = 1.464 g − 1.41 g = 0.054 g.The percent of NaCl in the sample is given by: Mass of NaCl in the sample / Mass of the sample × 100 %= 0.067 g / 1.41 g × 100 %= 4.7%.Therefore, the percent of NaCl in the original mixture is 4.7%.
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Related Questions
Which of the following options have the same value as %70, percent of 80?
Answers
Answer:
A, C and E.
Step-by-step explanation:
\(70 \% \times 80\)
\(70/100 \times 80\)
\(560/10\)
\(=56\)
\(0.7 \times 80\)
\(=56\)
\(7/10 \times 80\)
\(=56\)
Leo the Rabbit
Leo the Rabbit is climbing up a flight of 10 steps. Leo can only hop up 1 or 2 steps each time he hops. He never hops down, only up. How many different ways can Leo hop up the flight of 10 steps? Provide evidence to justify your thinking.
Can someone provide an answer and explain. Thanks
Answers
Answer:
2?
Step-by-step explanation: because he can hop them one step at a time or two steps at a time
I didn't get the right answer for my question. what do I do
Answers
What question are you talking about?
.Solve for x
x = 192
x = 336
x = 8√3
x = 4√21
Answers
We can solve this question by using Pythagoras Theorem . The value of x in the given question is 8√3.
What do you mean by Pythagoras Theorem?
The well-known Pythagorean Theorem, which states that the square of the hypotenuse is equal to the sum of squares of the lengths of the other two sides of the right-angled triangle, states that the square on the hypotenuse (the side opposite the right angle) is equal to the square on the legs of a right triangle. Pythagorean Theorem is written as a2 + b2 = c2. Alternatively, the square of the hypotenuse of a right triangle is equal to the sum of the squares of its two legs.
CalculationFrom the given triangle using Pythagoras theorem,
Assume the triangle as ABC where AB=y BC=z and AC=28
D is the altitude from B and BD=x
AD=12 so CD=16
Now using Pythagoras theorem,
(y)2 = (12)2 + (x)2 - eq1
(z)2 = (x)2 + (16)2 -eq2
(y)2 + (z)2 =(28)2 -eq3
Substitute eq 1 and 2 in 3
⇒2(x)2 + (12)2 + (16)2 =(28)2
⇒(x)2 =192
∴x =8√3
We can solve this question by using Pythagoras Theorem . The value of x in the given question is 8√3.
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Which number is greatest?6. 23 times 10 superscript 126. 23 times 10 superscript 86. 23 times 10 superscript negative 66. 23 times 10 superscript 3.
Answers
From the given numbers, the greatest number is 23 × 10^126
The first number = 23 × 10^126
The second number = 23 × 10^86
The third number = 23 × 10^66
The fourth number = 23 × 10^3
The scientific notation is defined as the easiest method to represents the very smallest or the largest number. The scientific notation consist of a whole number multiplied by the power of ten
Here, the whole number is same in all cases, only the power of the 10 is different . To find the largest number we have to find the number with largest power of 10
The number with largest power of 10 = 23 × 10^126
Hence, the greatest number is 23 × 10^126
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If you had money in a savings account earning 9% interest per year, how much would you make in interest on a deposit of $60.00 over two years?
Answers
The amount of interest earned on a deposit of $60.00 at a rate of 9% per annum for 2 years is $108.
As per the given problem:
Amount deposited = $60.00
Interest rate per year = 9%
The formula for calculating the interest is given by:
Interest = (Principal × Rate × Time)/100
Where Principal is the initial amount invested or deposited
Rate is the percentage of interest that you earn per annum
Time is the duration for which you want to calculate the interest
Putting the values in the above formula, we get:
Interest = (60 × 9 × 2)/100= (108 × 1)/1= $108
So, the amount of interest earned on a deposit of $60.00 at a rate of 9% per annum for 2 years is $108.
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True or False:
1)0^6=1^5
2)7^3=7 times 3
3)2^4=4^2
Answers
Answer:
1. 0^6=0 1^5=1 False
2. 7^3=7*7*7=343 7*3=21 False
3. 2^4=2*2*2*2=16 4^2=4*4=16 True
Answer:
1) False
2) False
3) True
Step-by-step explanation:
1) 0^6 = 0 and 1^5 = 1, so they are not equal.
2) 7^3 = 7*7*7= 343 and 7*3 = 21, so they are not equal.
3) 2^4 = 2*2*2*2 = 16 and 4^2 = 4*4 = 16, so they are equal.
If a 750 ml bottle of juice costs £1.90 and a 1 litre bottle of the same juice costs £2.50 then the 750 ml bottle is better value.
Answers
Answer:
The 1 liter bottle is better value
Step-by-step explanation:
Cost of 750 ml = £1.90
Cost of 1 liter = £2.50
1000 ml = 1 liter
Cost per 250 ml
750 ml / 3 = £1.90 / 3
250 ml = £0.6333333333333
Approximately,
£ 0.633
Cost per 250 ml
1 liter / 4 = £2.50 / 4
250 ml = £0.625
The 750 ml bottle is not a better value
The 1 liter bottle is better value
64,872 rounded to the nearest hundred is
Answers
64,872 rounded to the nearest hundred should be 64,900
Answer:
64900
Step-by-step explanation:
Look at number after hundred's place
if its 5 or higher round up
if its 4 or less round down
What additional information is required in order to know that the triangles are
congruent by HL?
Answers
Answer:
Option D
Step-by-step explanation:
In ΔHBC and ΔACB,
Statements Reasons
1). CB ≅ CB (leg) 1). Reflexive property
2). BA ≅ CH (Hypotenuse) 2). Additional information for the
congruence of two right triangles by HL
property.
3). ΔHBC ≅ ΔACB 3). HL property of congruence
Option D will be the correct option.
5 4/5 +4 3/8 = what ??///
Answers
Answer:
10 7/40
Step-by-step explanation:
5 4/5 + 4 3/8
4/5 = 32/40
3/8 = 15/40
5 32/40 + 4 15/40 = 9 47/40 = 9 + 1 7/40 = 10 7/40
Answer:
6 7/40
Step-by-step explanation:
That’s the answer and I’m sure cuz I did the math, also have a good night!
Mr Abdul made tuna and curry potato filling for some puffs.3/5 of the filling he made was tuna and the rest was curry potato.
After he used 1/8kg of the tuna filling and made another 3/4
kg of curry potato filling, he then had equal amounts of tuna filling
and curry potato filling left. How much tuna filling did he make at first?
Give your answer as a mixed number in its simplest form
Answers
At first, he made \(2\frac{5}{8}\) kg of tuna filling.
Mr Abdul made tuna and curry potato filling for some puffs.
3/5 of the filling he made was tuna and the rest was curry potato.
So, amount of curry potato = 1- 3/5 = 2/5
Ratio of tuna & curry potato = tuna : curry potato
= 3/5 : 2/5 = 3 : 2
Let amount of tuna = 3x & amount of curry potato = 2x
After he used 1/8kg of the tuna filling and made another 3/4 kg of curry potato filling.
According to the question, he then had equal amounts of tuna filling and curry potato filling left.
So, 3x - 1/8 = 2x + 3/4
Multiplying 8 in both sides we get,
⇒ 24x - 1 = 16x +6
⇒ 24x - 16x = 7
⇒ 8x = 7
⇒ x = 7/8
So, 3x = (3×7/8) = 21/8 kg = \(2\frac{5}{8}\) tuna filling at first.
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EASY POINTS ASAP:
The table shows a function. Is he function linear or nonlinear ?
Answers
Please help I have no idea
Answers
Answer:
38
Step-by-step explanation:
Put 2 in place of q
(34+18×2)-(5^2+7)
(34+36)-(25+7)
70-32=38
On the youth soccer team 3 out of 12 team members have played in previous years. Based on this information , if 180 kids are in the youth soccer league , then how many could be expected to have played the year before
Answers
Answer:
its 3/12 ×180 which is 1/4 of 180 as similar which is = 45. So we find out that 45 members where involved last year in youth soccer league.
Which of the following statements is not true about chi-square distributions? The mean decreases as the degrees of freedom increase. OPG? < 0) = 0 O PU2 > 3) is larger for a chi-square distribution with df = 10 than for df = 1 There are an infinite number of chi-square distributions, depending on degrees of freedom. They are always skewed to the right Previous Only saved at 4:44pm
Answers
The statement "The mean decreases as the degrees of freedom increase" is not true about chi-square distributions.
Is it true that the mean of a chi-square distribution decreases as the degrees of freedom increase?In fact, the mean of a chi-square distribution is equal to its degrees of freedom. It does not decrease as the degrees of freedom increase.
The mean remains constant regardless of the degrees of freedom. This is an important characteristic of chi-square distributions.
Regarding the other statements:
The statement "OPG? < 0) = 0" is true. The probability of a chi-square random variable being less than zero is always zero, as chi-square values are non-negative.The statement "OPU2 > 3) is larger for a chi-square distribution with df = 10 than for df = 1" is true. As the degrees of freedom increase, the right-tail probability of a chi-square distribution also increases.The statement "There are an infinite number of chi-square distributions, depending on degrees of freedom" is true. The number of chi-square distributions is infinite because the degrees of freedom can take any positive integer value.The statement "They are always skewed to the right" is generally true. Chi-square distributions tend to be skewed to the right, especially when the degrees of freedom are small.In summary, the statement that is not true about chi-square distributions is that the mean decreases as the degrees of freedom increase.
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Find the equation of the line!
help
Answers
Answer:
\(y=2x+5\)
Step-by-step explanation:
\((5,0)\)
Since the y-axis is cross on 5, that's the slope.
y=mx+5
To find x, let's use the formula;
\(m=\frac{rise}{run}\)
\(m=\frac{6}{3}=2\)
in the xy plane, the circles with equations (x-3) + y = 11 and (x+2) + y = r are externally tangent what is the value or r ?
let me know if you know man
Answers
In the XY plane, the circles with equations (x-3) + y = 11 and (x+2) + y = r are externally tangent. the value of r is -6.
What is tangent?Generally, To find the value of r, we can start by solving for the centers and radii of the two circles.
The equation of the first circle is of the form (x - h)² + (y - k)² = r², where (h, k) is the center of the circle and r is the radius. We can rewrite the equation of the first circle as (x - 3)² + y² = 11², so the center of the circle is (3, 0) and the radius is 11.
The equation of the second circle is also of the form (x - h)₂ + (y - k)₂ = r². We can rewrite the equation of the second circle as (x + 2)² + y² = r², so the center of the circle is (-2, 0) and the radius is r.
Since the two circles are externally tangent, the distance between their centers is equal to the sum of their radii. Therefore, the distance between the centers is equal to 11 + r. We can use the distance formula to find the distance between the centers:
distance = √((h₂ - h₁)^2 + (k₂ - k₁)²)
Plugging in the coordinates of the centers, we get:
distance = √((-2 - 3)^2 + (0 - 0)^2) = √(5^2 + 0^2) = √(25) = 5
Since the distance between the centers is equal to the sum of the radii, we can set up the equation:
5 = 11 + r
Solving for r, we get:
r = 5 - 11 = -6
Therefore, the value of r is -6.
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The library sponsors a chess club for members of all ages and skill levels. Currently, the ages of the members are 7, 9, 10, 11, 13, 14, 15, 16, 18, 19, 20, 21, and 22. The librarian uses a histogram to track the number of members in different age groups. For this situation, which is the appropriate way to label the age intervals on the x-axis?
Answers
Answer:
B. 7−10; 11−14; 15−18; 19−22
Step-by-step explanation:
How are 198:1,287 and 2:13 equivalent ratios
Answers
198:1287 = 2:13
Expressing 198 : 1287 in its simplest form, gives the value 2 :13 ; Hence, the two ratio expressions are equivalent.
In other to determine if 198:1,287 and 2:13 are equivalent ratios ;
Breakdown 198 : 1287 such that it is expressed in its lowest termIf the ratio obtained is equal to 2 : 13 ; then both ratio values are equivalent.Dividing both values by 99 ;
198 : 1287 = 2 : 13
Since, the ratio 198 : 1287 simplified to its lowest term equals 2 : 13 ; then both ratios are equivalent.
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HELP
25 POINTS!!!!!!!!!!!!!!!!!!!!!!11
Answers
Answer:
8/9 cups is the correct answer
Find the volume of the cylinder after the conic portion has Ben removed.Answer in term of pi.
Answers
Given a cylinder of radius = r = 6 ft, and a height = h = 10 ft
A conic portion removed from the cylinder
So, the volume of the remaining portion =
the volume of the cylinder - the volume of the cone
The volume of the cylinder =
\(\pi\cdot r^2\cdot h\)The volume of the cone =
\(\frac{1}{3}\pi\cdot r^2\cdot h\)so, the answer will be =
\(\pi\cdot r^2\cdot h-\frac{1}{3}\pi\cdot r^2\cdot h=\frac{2}{3}\cdot\pi\cdot r^2\cdot h=\frac{2}{3}\pi\cdot6^2\cdot10=240\pi\)So, the answer is option 3) 240pi
Popular wisdom is that eating presweetened cereal tends to increase the number of dental caries (cavities) in children A sample of children was (with parental consent) entered into a study and followed for several years. Each child was classified as a sweetened-cereal lover or a unsweetened cereal lover. At the end of the study, the amount of tooth damage was measured. Here are the summary data: 10 15 Mean 6.41 5.20 Std Dev 5.0 15.0 225 Sweetened Unsweetened Assuming the necessary conditions for inference are met, which of the following an approximate 95% confidence interval for the difference in the mean tooth damage?
O (6.41 -5.20) + 2.145 3+
O (6.41 - 6:20) +1.96 Vi+
O (6.41 -- 5.20) +1,96/13 + 38
O (6.41 -5.20) +2.202/33+
O (6.41 - 5:20): 2.2821+13 228 X
Answers
An approximate 95% confidence interval for the difference in the mean tooth damage is (6.41 - 5.20) ± 2.26\(\sqrt{\frac{25}{10}+\frac{225}{15} }\)
For sweetened samples
The value of n = 10
The mean of the samples = 6.14
The standard deviation of the sample = 5.0
For unsweetened samples
The value of n = 15
The mean of the sample = 5.20
The standard deviation of the sample = 15.0
We have to assume that necessary conditions for inference are met
The confidence interval = 95%
The equation will be
(6.41 - 5.20) ± 2.26\(\sqrt{\frac{25}{10}+\frac{225}{15} }\)
Therefore, the difference in the mean tooth damage is (6.41 - 5.20) ± 2.26\(\sqrt{\frac{25}{10}+\frac{225}{15} }\)
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Which of the following numbers is an integer?
Group of answer choices
0.5
1
0
3/2
Answers
Answer:
Second Option
Third Option
Step-by-step explanation:
Remember a integer is a number that isn't a fraction nor a decimal so the first option and the fourth option isn't a integer. Leaving the second and third option or "2, and 0" because integers are whole numbers that can be negatives, positives or even just a zero.
Hope this helps.
On one map of a town, the scale from the town to the map is 12mi:
3cm. The school is 2.5cm from the grocery store on this map. On a
different map of the same town, the scale from the town to the make
is 12mi: 2cm. The school is 1.5cm from the library on that map. Is
the grocery store or the library closer to the school? Show your work. old school
Answers
The distance between the school and the library is less. Then the library is closer to school.
What is dilation?Dilation is the process of increasing the size of an item without affecting its form. Depending on the scale factor, the object's size can be raised or lowered.
There is no effect of dilation on the angle.
On one map of a town, the scale from the town to the map is 12mi:3cm.
The school is 2.5cm from the grocery store on this map.
Then the distance between the school and the grocery store will be
⇒ (12 / 3) x 2.5
⇒ 10 miles
On a different map of the same town, the scale from the town to the make is 12mi: 2cm.
The school is 1.5cm from the library on that map.
Then the distance between the school and the library will be
⇒ (12 / 2) x 1.5
⇒ 9 miles
Thus, the distance between the school and the library is less.
Then the library is closer to school.
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Identify the following:a) Relative maximum(s):b) Relative minimum(s):c) Increasing interval(s):d) Decreasing interval(s):e) Domainf) Range:g) End Behavior:h) Zerosi) y-intercept:
Answers
relative maximum: (-3,4)
relative minimum: (-1,0)
increasing interval: (-∞,-3) U (-1,∞)
decreasing interval: (-3,-1)
domain: (-∞,∞)
range: (-∞,∞)
end behavior:
as x approaches to infinity, y approaches to infinity
zeros: x = -3, x = -1
y-intercept: y = 4
Aaron is considering two health insurance plans. The Get Well Soon Company charges an annual fee of 100 plus 10 per doctor visit, given y = 100+ 10z. The Mega Coverage Company charges
$35 per doctor, with no annual fee, represented by the equation: y = 352.
Which insurance company has the LOWER rate and what is the rate?
Answers
Until the 4th visit, GWS has the better cost but after the 4th visit, the cost for Mega is higher.
Find the discount or the sale price.
18. Find the discount on a $30 blouse that is on sale for
15% off.
19. Find the sale price of a $24 pair of sunglasses that is on sale
for 25% off.
Answers
Answer:
18. $4.50
19. $18
Step-by-step explanation:
18.
The discount is 15%.
The original price is $30.
The discount is 15% of $30.
To find a percent of a number, multiply the percent by the number. Change the percent to a decimal by dividing the percent by 100.
15% of $30 = 15% × $30 = 0.15 × $30 = $4.50
19.
The discount is 25%.
The original price is $24.
The discount is 25% of $24.
To find a percent of a number, multiply the percent by the number. Change the percent to a decimal by dividing the percent by 100.
25% of $24 = 25% × $24 = 0.25 × $24 = $6
The discount is $6.
Now we subtract the amount of the discount, $6, from the original price.
$24 - $6 = $18
Answer: $18
Which expressions are equivalent to 5(2e+3)+8(e+4)+3 ?
Select all that apply.
50 + 18e
2(9e+25)
15e + 50
2(9e+50)
2+4(4e+10)+10
Answers
Answer:
If you're in K12 the answers are : 2(9e+25), 50 + 18e
Step-by-step explanation:
Took the test and got it correct, hope this helped.
The simplification form of the expression 5(2e+3)+8(e+4)+3 is 50 + 18e or 2(9e + 25) options (A) and (B) are correct.
What is an expression?It is defined as the combination of constants and variables with mathematical operators.
It is given that:
The expression is:
= 5(2e+3)+8(e+4)+3
The distributive property is the property that expresses the distributive law of algebraic multiplication. Similarly, in polynomial expression we can use the distributive property, for example, we can write a(c+b) in the form of (ac+bc).
After simplification:
10e + 15 + 8e + 32 + 3
= 18e + 50
Or
= 50 + 18e
= 2(9e + 25)
Thus, the simplification form of the expression 5(2e+3)+8(e+4)+3 is 50 + 18e or 2(9e + 25) options (A) and (B) are correct.
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B. Directions: Write the correct unit abbreviation of the following:
1. Inches
2. Centimeter
3. Feet
4. Meter
5. Millimeter
Answers
The abbreviation is:- Inches - in
Centimeter - cm
Feet - ft
Meter - m
Millimeter - mm
Inches - in
An inch can be defined as the unit of length of measurement. It is represented using the symbol, ” or it can be denoted as in. For example, 4 inches is represented as 4” or 4 in. When you consider one whole inch it contains two half inches and 4 quarter inches.
Centimeter - cm
The centimeter (abbreviation, cm) is a unit of displacement (distance or length) in the cgs (centimeter/gram/second) system of units. The cm is equivalent to 0.01 meter, and there are about 2.54 centimeters in one linear inch.
Feet - ft
The foot ( pl. feet), standard symbol: ft, is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is a customarily used alternative symbol. In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. foot.
Meter - m
Meters is the fundamental unit for the length in the International System Of Units or SI units. The symbol “m” is used to represent it. In some countries, meters are also said as metres, which is also a unit of length.
Millimeter - mm
A millimeter is one-thousandth of a meter. A centimeter is one-hundredth of a meter. A decimeter is one-tenth of a meter.
So the abbreviation result is:- Inches - in
Centimeter - cm
Feet - ft
Meter - m
Millimeter - mm
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