A solution's concentration is a measure of how much solute has been dissolved in a given quantity of solvent or solution. A concentrated solution contains a significant amount of dissolved solute. In other words, it is the number of moles per unit volume of a solution. The standard unit for concentration is Molar or mol/dm3.
Given that:
Mass = x?
molar mass = 122.12
density = 1.27 g/ml
concentration = 100 mM = 0.1 M
volume = 250 ml
Since n = cv
And n = mass/ molar mass
Therefore,
mass/molar mass =concentration * volume
x/122.12 = 0.1 * 250
X = 3,053g
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Which student's plate is following the MyPlate recommendations?
Ashley has toast, a bowl of cereal, a granola bar, and a glass of juice.
Brian has pasta, a green salad, grilled chicken, and a glass of milk.
Kendra has yogurt, ice cream, an apple, and a glass of milk.
Megan has cookies, carrots, a piece of cake, and soda.
Brian is following the MyPlate recommendations because he has pasta, a green salad, grilled chicken, and a glass of milk.
Fruits and vegetables should take up half of the plate, according to MyPlate. The two basic categories of grains are whole grains and processed grains.Fruits, vegetables, grains, proteins, and dairy make up the bulk of the MyPlate dietary groups. Apples, grapes, oranges, berries, carrots, onions, maize, peas, bell peppers, and mushrooms are just a few examples of fruits and vegetables that are low in calories, rich in fiber, and deficient in potassium in the typical American diet. It includes antioxidant phytonutrients in addition to bone-building elements including potassium, calcium, magnesium, vitamin K, and vitamin C.To know more about MyPlate visit : https://brainly.com/question/14369091
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Answer:
B) Brian has pasta, a green salad, grilled chicken, and a glass of milk.
Proof:
A metal cube has a mass of 10 grams, and occupies 5 cubic centimeters of space.
What's its density?
Answer:
ρ (density) = M / V mass / unit volume
ρ = 10 g / 5 cm^3 = 2 g/cm^3 density of the metal
What type of light on the electromagnetic spectrum has the highest energy per photon?.
Answer:
Gamma rays have the highest energies
Explanation:
please make my answer as brainelist
Who is credited with developing a formula that predicted all of hydrogen's emission lines, including those outside of visible range?
Johannes Rydberg is credited with developing a formula that predicted all of hydrogen's emission lines, including those outside of visible range.
In atomic physics, the Rydberg formula calculates the wavelengths of a spectral line in many chemical elements. The formula was primarily presented as a generalization of the Balmer series for all atomic electron transitions of hydrogen. Rydberg's research was preceded by Johann Jakob Balmer's, who presented an empirical formula for the visible spectral lines of the hydrogen atom in 1885.However, Rydberg's research led him to publish a formula in 1888 which could be used to describe the spectral lines not only for hydrogen but other elements as well. Johann Jakob Balmer's was on developing a formula that predicted all of hydrogen's emission lines within the visible range, but Rydberg’s work took account of hydrogen’s emission lines outside the visible range.
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What kind of kinship ties exist between a father-in-law and his son-in-law?
OA. affinal
OB. consanguineous
OC. fictional
OD. descent
Answer:
A. affinal
Explanation:
Once a marriage has produced offspring, in-laws become affinal relatives who are defined not only by the order of law but also by their recognition of a biological link to the child.
An object initially at rest experience an acceleration of 9.8m/s/s. How much time will it take it to achieve a velocity of 58m/s
Answer: 5.91836735
Explanation:
For a problem such as this you would use the equation:
V final = V initial +(A*T)
V final = 58 m/s
V initial = 0 (b/c object begins at rest)
A (acceleration) = 9.8 m/s/s
T (time) = X
Time is our unknown variable so you would begin by plugging in your equation with the variables given, which would be:
58 m/s = 0 + (9.8 m/s/s * X)
Then you isolate X by doing:
58 m/s = 0 + (9.8 m/s/s * X)
-0 -0
58 m/s = 9.8 m/s/s * X
(58/9.8)
Getting: 5.91836735 seconds = X as your answer
4. Which is a NOT a unit for speed? (4 points)
1.cm/min
2.km/h
3.m/s
4.km
The net force on a moving object suddenly becomes zero and remains zero. the object will:_________-
If the net force on an object becomes zero and remains zero, the object will continue to move at constant velocity.
The net force acting on a body is the addition or the resultant of all the forces acting on the body. When the net force acting on a body is more than zero, it causes motion, but when it is zero, the object will remain at rest or will continue moving with uniform velocity.
This is in line with Newton's first law of motion which states that "a body will continue in its state of rest or will continue to move with uniform velocity unless it is acted upon by a force".
Thus, when the net force on a moving body becomes zero, it will not slow down or speed up, it will continue to move at the same speed. An example of this is when the passengers of a moving car fall forward when the car suddenly comes to a stop.
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Certain heavy industrial equipment uses ac power that has a peak voltage of 703 v. what is the rms voltage?
The RMS voltage of certain heavy industrial equipment is calculated as = 497.09 V . Ac power that has a peak voltage .
Evaluating :
RMS = [tex]\frac{V_{pk} }{\sqrt{2} } = \frac{703}{\sqrt{2} } \\\\[/tex]
= 497.09 V .
Simplification :
As the a c current fluctuates, the typical voltage can be computed in terms of the big voltage as using the following equation. Where v r m s is that the average voltage v. Big is that the peak voltage, so this is often the maximum voltage that can be derived from an a c power, therefore the relationship is p r m s equals v peak over square of 2. as long as the peak voltage is equal to 703 volts, we wish to seek out the v r m s. So we're just visiting divide the pick voltage by spirit of 2, which gives us the r m s of 703 over of 2, and this is often 497 point and the unit is same as the piquant, which is volts. So i hope everything is square.
What is RMS voltage ?
RMS or root mean square current/voltage of the alternating current/voltage represents the d.c. current/voltage that dissipates the identical amount of power as the average power dissipated by the alternating current/voltage. For sinusoidal oscillations, the RMS value equals peak value divided by the root of 2.
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The density of lead is 11.3 g/cm3. what is the mass of a block of lead 20.0 cm high by 30.0 cm long by 15.0 cm deep?
The mass of the block is 101,700g.
The mass of an object divided by its volume is the formula for determining density. This is expressed mathematically as d = m/v, where d denotes density, m denotes mass, and v denotes object volume. The common measurements are kg/[tex]m^{3}[/tex].
Density = mass / volume
where, volume = l×b×h
volume = 20×30×15
volume = 9000[tex]cm^{3}[/tex]
Now, Density = mass / volume
11.3 = mass / 9000
mass = 101700g
Therefore, the mass of the block is 101,700g.
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A car drives at 25 m/s and speeds up to 30 m/s in 2 s. What is the acceleration of the car?
A +15 m/s²
B +12.5 m/s²
C +27.5 m/s²
D +2.5 m/s²
HELP ME! WILL GIVE BRAINLIEST!
Answer:
Synthesis(Two substances that react to form one product): A + C -> AC
Decomposition(A compound that breaks down into two+ more substances): AB -> A + B
Single Replacement(replaced by another substance): A + BC -> AC + B
Double Replacement(Two substances replaced): AB + CD -> AD + CB
Combustion(A reaction between oxygen and another substance such as water) : CH + O2 -> CO2 + H2O
So that would mean that
[tex]H_{2}O + SO_{3} - > H_{2}SO_{4}= Synthesis 2H_{2}O_{2} - > 2H_{2}O + O_{2} = DecompositionPb(No_{3})_{2} + 2KI - > 2KNO_{3} + PbIx_{2} = Replacement C_{3}H_{8} + 50_{2} - > 3C0_{2} + 4H_{2}O - Combustion[/tex]
Explanation:
Two ideal gases, a and b, are at the same temperature. if the molecular mass of the molecules in gas a is twice that of the molecules in gas b, the molecules' root-mean-square speed is?
The molecules' root-mean-square speed is R = 8.31 J/(mole⋅ K)
Thermal Motion:Molecules in any object are in constant motion, the speed of that motion being defined by the temperature of the thing . just in case of ideal gases, the speed of motion is that the function of the temperature and the molar mass of the gas only.
Evaluation :The root mean square speed of the molecules in the gas is given by: vrms =√3 RT/M
Here,
T is the temperature of the gas;
R = 8.31 J/(mole⋅ K) is the universal gas constant;
M is the molar mass of the gas;
Since the molecular mass of the gas A is twice as large and therefore the speed is inversely proportional to the square root of the molar mass, the speed of molecules in B is bigger by the factor √2 ≈ 1.4
What is molar mass?
The molar mass (symbol M, SI unit kg·mol−1) is defined because the mass per unit amount of substance of a given chemical entity. keep with the definition of the mole, the chemical entity in question should be specified
What is molar mass and mole?
The molar mass of a substance is defined because the mass of 1 mol of that substance, expressed in grams per mole, and is adequate to the mass of 6.022 × 10²³ atoms, molecules, or formula units of that substance
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