Answer:
0.558 M.
Explanation:
Hello!
In this case, when computing the resulting concentration of the solution after a mixing process, we first need to compute the moles provided by each solution:
[tex]n_{NaCl}^{sol1}=0.284L*0.850mol/L=0.2414mol\\\\n_{NaCl}^{sol2}=0.467L*0.380mol/L=0.1775mol[/tex]
So the total number of moles are:
[tex]n_T=0.2414mol+0.1775mol=0.4189mol[/tex]
And the total volume which is additive:
[tex]V_T=0.284L+0.467L=0.751L[/tex]
Therefore, the resulting molarity of sodium chloride is:
[tex]M=\frac{0.4189mol}{0.751L}\\\\M=0.558M[/tex]
Best regards!
what information do you obtain from molecular formula?
Answer:
Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.
Explanation:
hope this helped !
HELP ASAP PLEASEEEEE!!!!! (serious answers only or i’ll report)
Mg(s)+2HCl(aq)—>MgCl2(aq) + H2(g)
what is the order of the reaction between magnesium and hydrochloric acid, with respect to magnesium?
Answer:
1st order
Explanation:
because magnesium has a coefficient of 1, it is first order
hydrochloric acid has a coefficient of 2, so it is second order
overall the reaction is third order (1+2)
The speed of a wave in the string is 16.2ms. The mass per unit length of the string is 0.3ms calculate tension in the string
Answer:
The tension in the string is 78.73 N.
Explanation:
The tension in the string can be determined from the expression;
v = [tex]\sqrt{\frac{T}{m} }[/tex]
where: v is the speed of the wave in the sting, T is the tension in the string and m is the mass per unit length of the sting.
Given that: v = 16.2 m/s, and m = 0.3 kg/m.
Then;
16.2 = [tex]\sqrt{\frac{T}{0.3} }[/tex]
Square both sides to have,
[tex](16.2)^{2}[/tex] = [tex]\frac{T}{0.3}[/tex]
T = [tex](16.2)^{2}[/tex] x 0.3
= 252.44 x 0.3
= 78.732
T = 78.732 N
The tension in the string is 78.73 N.
determine the mass of 840 cm3 of oxygen gas, O2 at rtp
Answer:
Mass = 0.96 g
Explanation:
Given data:
Volume of oxygen = 840cm³
Temperature = at room = 25°C
Pressure = at room = 1 atm
Mass of oxygen = ?
Solution:
Volume of oxygen = 840 cm³ × 1 L /1000 cm³ = 0.84 L
Temperature = 25 +273.15k = 298.15 K
Formula:
PV = nRT
n = PV/RT
R = 0.0821 atm.L/mol.K
n = 1 atm × 0.84 L / 0.0821 atm.L/mol.K × 298.15 K
n = 0.84 atm.L / 24.48 atm.L/mol
n = 0.03 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.03 mol × 32 g/mol
Mass = 0.96 g
a client is to receive 2.00g of a drug. The drug comes on a solution that has 500 mg per 5.0 mL. Each vial contains 10 milliliters. How many vials do you need?
how to be happy, i miss them
you have to not let your past or your sad thoughts get the best of you.. that what I do i do get sad sometimes but dont let that get u down
Answer:
focus on whats ahead of u, not behind u ok?
Explanation:
hope this helps
do guitar strings deform? and how??
Answer:
yes; and because of how roughly they are played.
Explanation:
This is something I really need help in pls
Answer:
3 m/s2
Explanation:
i looked it up on quizizz and it showed 3 m/s2
True or false: In a chemical reaction, atoms of elements cannot be present in the products if they were not present in the reactants.
A
True
B
False
Answer:
A
Explanation: Your answer is A true
2. How do the ancient Greek model and Ptolemy's model differ?
Answer:
Greek's Model used stars while Ptolemy did not use stars.
Explanation:
The Greek model had stars as part of the system and they revolved around the Earth. Ptolemy's model did not include the stars, but it did include the moons that revolves around the planets.
Explain the Rules that determine how electrons are arranged around the nuclei of atoms. Use examples to explain the rules/principles.
Viewed simply, electrons are arranged in shells around an atom's nucleus. Electrons closest to the nucleus will have the lowest energy. Electrons further away from the nucleus will have higher energy. ... In a more realistic model, electrons move in atomic orbitals, or subshells.
By definition:
there are 7 energy levelsthere are 4 sub-levelsAufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits.Example: for hydrogen, its electronic configuration would be: 1s¹.The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Electrons with less energy will be spinning at level 1.
Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f.
In the sub-level s there can only be a maximum of 2 electrons, in sub-level p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.
Aufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits around the nucleus of the atom. This principle states that the filling of these orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.
The simplest of the sub-levels is 1s. If you fill the 1s you can start filling the 2s. After the 2s sub-level is satisfied, the 2p can begin to fill and so on. The order is:
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d¹⁰7p⁶
In this way, taking into account the atomic number Z of the element (which represents the number of protons of the element, and in a neutral atom it also indicates the number of electrons), the electrons that it has in the orbitals will be placed following the previously established.
For example, for hydrogen, whose atomic number is Z = 1, its electronic configuration would be: 1s¹.
Remember that the number 1 that precedes the representative letter of the orbital indicates the level of energy where the electron is located, the letter s indicates the type of orbital where the electron is located, and the exponent 1 indicates the number of electrons that are located in said orbital.
In summary:
there are 7 energy levelsthere are 4 sub-levelsAufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits.Example: for hydrogen, its electronic configuration would be: 1s¹.Learn more:
https://brainly.com/question/54296601. How many moles of sulfur are in 40g of sulfur?
Answer:
1 sulfur
Explanation:
1 mole is equal to 1 moles Sulfur, or 32.065 grams
Answer:
[tex]\boxed {\boxed {\sf 1.24727159 \ moles \ of \ sulfur }}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass found on the Periodic Table of Elements.
1. Molar Mass
This is a sample of sulfur, so look for S on the table.
S: 32.07 g/mol2. Convert from Grams to Moles
Use the molar mass as a ratio.
[tex]\frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Multiply by the given number of grams: 40
[tex]40 \ g \ S * \frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Flip the fraction so the grams of sulfur will cancel each other out.
[tex]40 \ g \ S * \frac {1 \ mol \ S }{ 32.07 \ g \ S}=40* \frac {1 \ mol \ S }{ 32.07 }[/tex]
[tex]\frac {40 \ mol \ S } { 32.07 } = 1.24727159 \ mol \ S[/tex]
There are 1.24727159 moles of sulfur.
Which of these would be affected
immediately, if energy from the Sun were
stopped?
F. the flying birds
G. the ability of wood to burn
H. the chemical reaction that makes ash
J. the growth of trees
Answer:
J. the growth of trees
Explanation:
The growth of trees would be greatly impaired if the energy from the sun were stopped.
Plants generally use the energy from the sun to obtain their nourishment. This same process makes food available in the ecosystem.
Plants are producers of food. The process of photosynthesis allows plants to manufacture food by using sunlight to drive the reaction between carbon dioxide and water to produce glucose and oxygen gas. The glucose is used by plant for nourishment.Following intense exercise, the blood pH was determined to be 7.1. If the HCO3- is 7.5mM and the pKa for HCO3- is 6.1, what is the CO2 concentration in the blood
Answer:
[tex]0.75\ \text{mM}[/tex]
Explanation:
Concentration of [tex]HCO_3^-[/tex] = [tex][HCO_3^-]=7.5\ \text{mM}[/tex]
[tex]pK_a[/tex] for [tex]HCO_3^-[/tex] = 6.1
[tex]pH[/tex] of blood = 7.1
The reaction is as follows
[tex]H_2CO_3+H_2O\rightarrow HCO_3^-+H_3O^+[/tex]
From the Henderson equation we get
[tex]pH=pK_a+\log\dfrac{[HCO_3^-]}{[H_2CO_3]}\\\Rightarrow 7.1=6.1+\log \dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 1=\log\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 10^1=\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow [H_2CO_3]=\dfrac{7.5}{10}\\\Rightarrow [H_2CO_3]=0.75\ \text{mM}[/tex]
[tex]CO_2(g)+H_2O(l)\rightarrow H_2CO_3(aq)[/tex]
Concentration of [tex]H_2CO_3[/tex], [tex][H_2CO_3]=[CO_2][/tex]
Concentration of [tex]CO_2[/tex], [tex][CO_2]=[H_2CO_3]=0.75\ \text{mM}[/tex].
The density of aluminum is 2.7 g/mL if I add a piece of aluminum to a graduated cylinder of water in the water level increases by 8.2 ML what is the mass of the piece of aluminum
3.0 g
22 g
5.5 g
0.33 g
A 1% solution of Ivermectin contains how many mcg per mL?
Ivermectin is present at doses of 10 mg per mL, which is adequate to treat 110 lb (50 kg) of body weight (maximum 10 mL per injection site.).
What is Ivermectin ?
Antiparasitic medication ivermectin is used. It was first used in veterinary medicine to prevent and treat heartworm and acariasis after being discovered in 1975.
A steroid is not ivermectin. Drugs called steroids behave similarly to cortisol and work to reduce edoema in the body. Prednisolone, betamethasone, and other typical steroids are listed below. Ivermectin, on the other hand, is an anthelmintic medication.
Barbiturates (such as phenobarbital and butalbital), benzodiazepines (such as clonazepam and lorazepam), sodium oxybate (GHB), and valproic acid are a few of the medications that may interact with this medication.
Thus, Ivermectin is present at doses of 10 mg per mL, which is adequate to treat 110 lb (50 kg) of body weight (maximum 10 mL per injection site.)
To learn more about Ivermectin, follow the link;
https://brainly.com/question/28524204
#SPJ2
how does the mass and size of an atom compare to the mass and size of the nucleus
Answer:
Explanation:
The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.
Answer:
The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.
Explanation:
Which molecule has a dipole moment?
A. Cl2 (linear geometry)
B. H2S (bent geometry)
C. CCIA (tetrahedral geometry)
D. CO2 (linear geometry)
B. I think im probly wrong
PLZ HURRY GIVING 35 POINTS
How many atoms are there in 4430 grams of lithium (Li)?
Answer:
3843.96 × 10²³ atoms
Explanation:
Given data:
Mass of Li = 4430 g
Number of atoms = ?
Solution:
We will calculate the number of moles first.
Number of moles =mass/molar mass
Number of moles = 4430 g/ 6.94 g/mol
Number of moles = 638.32 mol
1 mole contain 6.022 × 10²³ atoms
638.32 mol × 6.022 × 10²³ atoms / 1 mol
3843.96 × 10²³ atoms
Many tests to distinguish aldehydes and ketones involve the addition of an oxidant. Only __________ can be easily oxidized because there is_________ next to the carbonyl and oxidation does not require _______
Answer:
AldehydesA hydrogen atomOxygenExplanation:
Many tests to distinguish aldehydes and ketones involve the addition of an oxidant. Only aldehydes can be easily oxidized because there is a hydrogen atom next to the carbonyl and oxidation does not require oxygen
QUESTION 20
A slice of pizza contains 17 g of fat, 25 g of carbohydrate, and an unknown amount of protein. If the piece of pizza contains a total of 750 kcal,
how many grams of protein does the slice of pizza contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcalg
for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures.
429
O Can not be determined from the given information.
O 649
O 749
120 g
Save All Answ
MacBook Pro
Answer:
Explanation:
Let the protein contained in pizza be m gram .
calories contained by 17 g of fat = 17 x 9 kcals = 153 kcals .
calories contained by 25 g of carbohydrate = 25 x 4 kcals = 100 kcals .
calories contained by m g of protein = m x 4 kcals = 4 m kcals .
Total calories of slice of pizza = 153 + 100 + 4m kcals
= 253 + 4m kcals
Given ,
253 + 4m = 750
4m = 497
m = 124.25 g .
120 g ( rounded to two significant figures )
A photon of light has an energy of 1.83 x 10-18). What is the wavelength of this light? Does this light fall in the IR, visible, or UV region of the electromagnetic spectrum?
Answer:
1.09 × 10⁻⁷ m
UV region
Explanation:
Step 1: Given and required data
Energy of the photon of light (E): 1.83 × 10⁻¹⁸ J
Planck's constant (h): 6.63 × 10⁻³⁴ J.s
Speed of light (c): 3.00 × 10⁸ m/s
Step 2: Calculate the wavelength (λ) of this photon of light
We will use the Planck-Einstein's relation.
E = h × c/λ
λ = h × c/E
λ = 6.63 × 10⁻³⁴ J.s × (3.00 × 10⁸ m/s)/1.83 × 10⁻¹⁸ J = 1.09 × 10⁻⁷ m
This wavelenght falls in the UV region of the electromagnetic spectrum.
A similarity ratio of scale factor is the ratio of the lengths of the corresponding of two similar polygons
Answer:
go to hellfhshahahahahahahahahaha aha
Explahhhhahah
What is the name of the following compound? Se5S6
Answer:
I'm sorry I couldn't find it, I looked all over the internet
Scientists did not know about cells before the 1600s because the
microscope had not been invented yet. *
O True
False
A living thing must respond to the environment, has needs, grows, must be 1 point
able to reproduce, breathes/respirates, and is made of one or more cells. *
True
False
Which has the larger first ionization energy—magnesium or phosphorus?
a
Phosphorus has the greater first ionization energy.
b
Magnesium and phosphorus have equal first ionization energies.
c
Magnesium, but not phosphorus, has a measurable first ionization energy.
d
Magnesium has the greater first ionization energy.
Answer:
The correct option is a
Explanation:
First ionization energy is the minimum amount of energy required to remove the most loosely bound electron (valence electron) from the outermost shell of a gaseous or neutral atom. Since it takes more amount of energy to remove more electrons, it (ionization energy) generally increases across the period and decreases down a group because the closer the outermost shell is to the nucleus, the more difficult/energy required to remove electrons in that shell.
Since magnesium and phosphorus are on the same period (period 3), it can be deduced from the explanation above that phosphorus has a greater first ionization energy than magnesium because phosphorus (5 valence electrons) has more electrons in it's outermost shell than magnesium (2 valence electrons).
Which is least likely to occur after an experiment i conducted to test a hypothesis?
O The data is analyzed to see if it supports or refutes the hypothesis.
O The same experiment is conducted again to see if the data are reliable.
O The hypothesis becomes a theory if the results support it.
O Anew experiment is designed to provide additional data about the hypothesis.
Answer:
The hypothesis becomes a theory if the results support it is answer.
Explanation:
I hope it's helpful!
What is the velocity of a plane to travel 3000 miles from New York to California in 4.5 hours
Answer:
[tex]velocity = \frac{displacement}{time} \\ v = \frac{3000}{4.5} \\ v = 666.67 \: miles \: per \: hour \\ or \\ v = 666 \frac{2}{3} \: miles \: per \: hour[/tex]
