Answer:
if youre talking about macros to lose/gain weight then the Macronutrients refer to carbs, fats and protein — the three basic components of every diet. you cant tell them apart by looking at them but read labels and ingredients listed from packages or you can search them up
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What dose the wave carry
Answer:
Waves carry energy from one place to another.
Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.
Explanation:
i hope it helps
that's my answer
correct me if im wrong
#carryonlearningIn an aqueous solution, 42% of a substance dissociates to release hydronium ions. Which of the following statements is true for the substance?
It is a weak acid.
It is a weak base.
It is a strong acid.
It is a strong base.
Answer: The statement it is a weak acid is true for the substance.
Explanation:
An acid that dissociates completely when dissolved in water to give hydrogen [tex](H^{+})[/tex] or hydronium [tex](H_{3}O^{+})[/tex] ions is called a strong acid.
For example, HCl is a strong acid.
[tex]HCl + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}[/tex]
An acid that dissociates partially or weakly when dissolved in water to given hydrogen or hydronium ions is called a weak acid.
For example, [tex]CH_{3}COOH[/tex] is a weak acid.
[tex]CH_{3}COOH \rightleftharpoons CH_{3}COO^{-} + H_{3}O^{+}[/tex]
A strong base is a base which when dissolved in water then it dissociates completely to give hydroxide ions.
For example, NaOH is a strong acid.
A weak base is a base which when dissolved in water then it dissociates partially or weakly to give hydroxide ions.
For example, [tex]NH_{3}[/tex] is a weak base.
Hence, in an aqueous solution where 42% of a substance dissociates to release hydronium ions shows that the dissociation is less than 50%. This means that substance is dissociating weakly so, it is a weak acid.
Thus, we can conclude that the statement it is a weak acid is true for the substance.
Answer:
It is a weak acid.
Explanation:
I took the test :)
URGENT!!!
A solution has a [H3O+] of 1 × 10−5 M. What is the [OH−] of the solution? (5 points)
9 M
14 M
1 × 10−9 M
1 × 10−14 M
Answer:
[tex]{ \bf{from \: ionic \: product \: of \: water : }} \\ { \boxed{ \tt{k _{w} = [H _{3} O {}^{ + } ][OH {}^{ - } ]}}} \\ \\ { \tt{1 \times {10}^{ - 14} = (1 \times {10}^{ - 5} ) [OH {}^{ - } ]}} \\ \\ { \tt{[OH {}^{ - } ] = 1 \times {10}^{ - 9} }} \: M[/tex]
A solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.
What is [OH−] of the solution?The water is made up of H2O only and when the pH of it is 7 then the concentration of all the ions would be the same while dissociation the water will get dissociate into H+ ions and OH- ions.
The concentration of OH- ions will be
OH- = Kw {H3O+}
{H3O+} = 1 × 10−5 M.
Kw = 14
substituting the value in the equation,
OH = 14 { 1 × 10−5 M.}
OH = 1 × 10−9 M
Therefore, the solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.
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In the diagram shown, what is occurring at the section marked 4 ?
Temperature
:: ا
4
2
Heat Energy
O Melting
Freezing
O Condensation
O Vaporization
Answer:
Vaporization
Since the question does not specify what molecule is being acted upon by the increment in temperature, I'll assume it's water.
When first taken out of the fridge, water is in the form of ice, and it has not been affected by a change in temperature yet, so it's at the origin.
(origin = ice)
As you raise the temperature, however, the ice starts to melt, and melting occur during phase 2. You have to keep the temperature constant for the process to properly occur.
(phase 2 = melting)
After it finishes melting, the ice is now in it's liquid state, which is water. The temperature continues to rise in order to proceed to the next phase.
(2nd slope = water)
Lastly, Water is being vaporized during phase 4. Notice, the temperature is kept constant in order to allow the process to properly occur.
(phase 4 = vaporization)
Concentrations-
A student dissolves 5.62 grams of magnesium Sulfate, MgSO4, in 100.0 ml of distilled water. What is the molarity of this solution?
If possible, provide work.
PLEASE HELP, WILL MARK BRAINLIEST How many moles is 2.80 x 1024 atoms of silicon (Si)? Show your work.
Answer:
4.65 moles
Explanation:
1 mole ---> 6.022×10²³ atoms of si
X mole ---> 2.8×10²⁴ atoms of si
X= 2.8×10×10²³/6.022×10²³
=28/6.022
=4.65moles
which of the following element is not in group vii of the periodic table
Answer:
Oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv). ... Modern version of the periodic table of the elements (printable).
type of intermolecular forces in paraffin
Answer:
The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.
Explanation:
Answer: The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.
Explanation:
The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent. 103 Paraffin wax is soluble in: a) water; b) hexane; c) acetone; d) ethanol Is shopping bag (polyethylene)
hope it helps
Look at the picture to answer please!!
Need help asp :))
for a clear understanding of how closely they are related, scientists compare their DNA, an essential molecule that's the instruction manual for building each species. Humans and chimps share a surprising 99 percent of their DNA.
PLEASE HELP ME
How are the electron structures of hydrogen (H) and lithium (Li) similar?
A. They both have 1 electron in an s sublevel.
B. Neither one has any valence electrons.
C. They both have valence electrons in the 1s sublevel.
O D. They both have valence electrons in the first main energy level.
The electron structures of hydrogen (H) and lithium (Li) are similar as " they both have 1 electron in an s sublevel".
What is sub-level?The quantum theory defines a sublevel as an energy level. Sublevels in chemistry refer to the energy caused by electrons. Sublevels can also relate to energy caused with the nucleus in physics.
It is know that the atomic number of hydrogen is 1 and the atomic number of lithium is 3.
The electronic configuration of H = [tex]1s^{1}[/tex].
The electronic configuration of Li = [tex]1s^{2} 2s^{1}[/tex].
Its can be seen that hydrogen and lithium both posses 1 electron in s sublevel
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in which group and period of the periodic table is element y placed?
Answer:
In the periodic table element Y is known as Yttrium and the Atomic number is 39. And the group is Transition Metal
Given the equilibrium reaction at constant pressure:
2HBr(g) + 17.4 kcal — H2(g) + Br2(g)
When the temperature is increased, the equilibrium will shift to the
A Right, and the concentration of HBr(g) will increase
B Left, and the concentration of HBr(g) will decrease
C Right, and the concentration of HBr(g) will decrease
D) Left, and the concentration of HBr(g) will increase
Answer: C Right, and the concentration of HBr(g) will decrease
Since it is an endothermic reaction the equilibrium will shift to the right direction i.e. product side decreasing concentration f HBr.
In the case when the temperature is increased so here the equilibrium should be shifted to the right and the concentration of HBr(g) will decrease.
Impact on increase in temperature:The given reaction represent the endothermic reaction since it absorb the heat.
So in the case when there is endothermic reaction so here there should be increase in temperature since the reaction should goes forward direction and the concentration of HBr(g) will decrease.
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II. Which statement seems more likely to be true?
A.
Double replacement reactions are always neutralizations.
B.
Neutralizations are always double replacement reactions.
Answer:
B
Explanation:
Neutralisations are always double replacement reactions
Which of the following is an advantage of using an energy-efficient household
appliance instead of a traditional household appliance?
A. It works only during the daytime.
B. It uses no electricity
c. It conserves electricity.
D. It does not work as effectively
Calcular la cantidad de NaOH necesaria para preparar medio litro de disolución 2,5 N. (Dato: peso molecular del NaOH = 40 g/mol).
Answer:
The amount of NaOH required to prepare a solution of 2.5N NaOH.
The molecular mass of NaOH is 40.0g/mol.
Explanation:
Since,
NaOH has only one replaceable -OH group.
So, its acidity is one.
Hence,
The molecular mass of NaOH =its equivalent mass
Normality formula can be written as:[tex]Normality=\frac{mass of solute NaOH}{its equivalent mass} * \frac{1}{volume of solution in L} \\[/tex]
Substitute the given values in this formula to get the mass of NaOH required.
[tex]2.5N=\frac{mass of NaOH}{40g/mol} *\frac{1}{1L} \\mass of NaOH=2.5N*40gmol\\ = 100.0g[/tex]
Hence, the mass of NaOH required to prepare 2.5N and 1L. solution is 100g
At constant temperature and pressure, the coefficients for gaseous species in a valences chemical reaction can be interpreted as? 1) grams 2) pressure 3) volume 4) atoms
Determine the number of protons, electrons, and neutrons present in an atom of patassium. Explain how you determined your answer using complete sentences.
Please make sure your right.
Thank you!!!
Why does the water turn blue after some time when blue ink is dropped in water? Which property
of particles of matter is depicted here?
Answer:
Particles are constatantly moving and diffusing
This is possible because of diffusion
Explanation:
Hope this helps
When two ice skaters initially at rest push off one another, their final
momenta are..."
Answer:B
Explanation:
What volume of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water?
Answer:
200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water.
Explanation:
The solution is the result of the mixture between the solute, which is the substance that dissolves, and the solvent, which is the substance in which a solute dissolves. That is, a solution (or solution) is a mixture of two or more components, perfectly homogeneous since each component is intimately mixed with the other.
The concentration of solutions is the amount of solute contained in a given amount of solvent or solution. A unit of concentration is the percent weight to volume.
The percent weight to volume is the percentage ratio between the weight of the solute and the volume of the solution. It is calculated as:
[tex]Percent =\frac{mass of solute}{volume of solution} *100[/tex]
Mass is measured in grams, while volume is measured in mL.
In this case:
Percent weight to volume= 6%mass of solute= 12 gvolue of solution= ?Replacing:
[tex]6=\frac{12 g}{volume of solution} *100[/tex]
Solving:
volume of solution*6= 12 g*100
[tex]volume of solution=\frac{12 g}{6} *100[/tex]
volume of solution= 200 mL
200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water
what is photosynthesis ?
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Explanation:
basically when plants make food for themselves
Answer:
photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.Explanation:
hii are you also from India ¯\_(ツ)_/¯Air is a solution of gases, what is the solvent in air?
In which of the following substances do you find strong hydrogen bonding?
A hydrogen sulphide
B liquid ammonia
D hydrogen gas
C hydrochloric acid
Answer:
The strength of an individual H bond depends on the polarity of the H-X bond and therefore on the electronegativity of X ( the more delta positive the H atom, the stronger the electrostatic force of attraction between it and a lone pair of electrons). Thus, on a per bond basis, HF H bonding is strongest. However, as water has two H atoms, each molecule can form two H bonds so on a per molecule basis, water H bonding is strongest (this is evidenced by the boiling points of the three substances; NH3 < HF < H2O.)
Explanation:
Correct me if I'm wrong
El hidróxido de sodio es un compuesto muy importante en el proceso de obtención de detergentes. Determinar la molaridad de la disolución resultante, si se disuelven 8 gramos de hidróxido de sodio en agua hasta preparar 100 mililitros de disolución.
Answer:
2 molL ^ -1
Explanation:
Masa de soluto = 8 g
volumen de solución = 100 mililitros o 0,1 L
Número de moles de solución = masa / masa molar = 8g / 40g / mol = 0,2 moles
concentración = número de moles / volumen
concentración = 0.2 / 0.1
= 2 molL ^ -1
the structure of butanoic acid
answer on here fjchcjfjdnc.com
a thermometer is used to measure which of the following?
A.The kinetic energy of the molecules in a substance
B.The potential energy a solution has
C. The density of a fluid
D.All of the above
Answer:
c. i hope im not wrong hmmm
The Copper Chloride solution used in the investigation contained 300 grams per dm3 of solid CuCl2 dissolved in 1dm3 of water.
The student used 50cm3 of copper chloride solution in each experiment. Calculate the mass of solid copper chloride used in each experiment.
Answer:
The mass of solid copper chloride used in each experiment=15 g
Explanation:
We are given that
Mass of copper chloride in solution=300g/dm3
Volume of solution used in each experiment=50 cm3
We have to find the mass of solid copper chloride used in each experiment.
[tex]1cm^3=0.001 dm^3[/tex]
[tex]50cm^3=0.05 dm^3[/tex]
1 dm3 contained solid copper chloride=300 g
0.05 dm3 contained solid copper chloride=[tex]300\times 0.05[/tex]g
0.05 dm3 contained solid copper chloride=15 g
Hence, the mass of solid copper chloride used in each experiment=15 g
I need help, please. ASAP anyone willing to help a port innocent child like me
Answer:
Kₑq = [H₂]² [O₂] / [H₂O]²
Explanation:
We'll begin by defining equilibrium constant for a reaction. This is given below:
The equilibrium constant for a given reaction is defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.
With the above information in mind, we shall determine the equilibrium constant for the reaction given in the question above. This is illustrated below:
2H₂O (g) <=> 2H₂ (g) + O₂ (g)
Kₑq = [H₂]² [O₂] / [H₂O]²
what is the chemical formula for Mg2+ and I1- ( magnesium and iodine)
Answer:MgI2
Explanation:
Why do avocados brown?
Explanation:
bc they are avocado.. and brown
