1,670,000,000 in
scientific notation pleaseeee
Answer:
1.67 × 10^9
Explanation:
how many grams of salt are in 5 l of a solution with a concentration of 3 g/L
Answer: 15 grams of salt are there in 5 L of solution.
Explanation:
Concentration of a solution is defined as the number of grams of solute dissolved per liter of the solution.
Given : Concentration of solution : 3 g/L
1 Liter of solution contains = 3 gram of salt
Thus 5 L of solution contains = [tex]\frac{3g}{1L}\times 5L=15g[/tex]
Thus 15 grams of salt are there in 5 L of solution.
What is the molarity of a solution that contains 0.202 mol KCl in 7.98 L solution?
Explanation:
molarity = no. of moles of solute/solution in litres
molarity =0.202/7.98
=0.025 M
Define Transportation plants:
Define Respiration Plants:
Answer:
Define Transportation in plants: Transportation in plants is when the plant transports water and other mineral throughout the whole plant from the roots to the stem and finally specific parts of a plant.
Define Respiration In Plants: Is when plants use photosynthesis to make their own food to make energy for the plant's growth
How many mL of a 6.0 M solution of HNO3 would be needed to prepare 300.0 mL of a 0.60 M solution of HNO3?
Answer:
500mL.
Explanation:
The pressure of a gas is 440. mm Hg. Express this in units of (a) atmospheres, (b) bars, and (c) pascals.
Answer: a) 0.579 atm
b) 0.585 bar
c) 58662 Pa
Explanation:
Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..
All these units of pressure are inter convertible.
We are given:
Pressure of the gas = 440 mmHg
a) Converting this unit of pressure into 'atm' by using conversion factor:
[tex]760mmHg=1atm[/tex]
[tex]440mmHg=\frac{1}{760}\times 440=0.579atm[/tex]
b) Converting this unit of pressure into 'bars' by using conversion factor:
[tex]760mmHg=1.01bar[/tex]
[tex]440mmHg=\frac{1.01}{760}\times 440=0.585bar[/tex]
c) Converting this unit of pressure into 'Pascal' by using conversion factor:
[tex]760mmHg=101325Pa[/tex]
[tex]440mmHg=\frac{101325}{760}\times 440=58662Pa[/tex]
Which elements are
considered "Noble Metals"?
Answer:
ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), silver (Ag).
Explanation:
The term "Noble Metals" traditionally refers to a group of metals that are resistant to corrosion and oxidation in moist or chemically aggressive environments. The elements commonly considered noble metals are Gold, Platinum, Palladium, Palladium, etc.
Gold is perhaps the most well-known noble metal. It is highly resistant to corrosion and oxidation. Platinum is another widely recognized noble metal. It is extremely resistant to corrosion and has a high melting point.
Palladium is a noble metal that exhibits excellent chemical stability and resistance to corrosion.
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Calculate the number of moles in 7.04 g of lead (II) nitrate, Pb(NO3)2
Can Someone help me covert this?!
Answer:
moles Pb(NO₃)₂ ≅ 0.0213 mole (three sig. figs.)
Explanation:
converting...
grams to moles => divide by formula weight
moles to grams => multiply by formula weight
for this problem ...
moles Pb(NO₃)₂ = 7.04g / 331.2g/mol = 0.021256 (calculator answer)
≅ 0.0213 mole (three sig. figs.)
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the number of moles in 7.04 g of lead (II) nitrate, Pb(NO₃)₂ is 0.0212moles.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole =given mass ÷ molar mass
Molar mass of 1 mole of Pb(NO₃)₂ = 331.2g/mol
given mass of Pb(NO₃)₂=7.04g
Substituting the values in above formula we get
moles of Pb(NO₃)₂ = 7.04g / 331.2g/mol
moles of Pb(NO₃)₂ = 0.0212moles
Therefore, the number of moles in 7.04 g of lead (II) nitrate, Pb(NO₃)₂ is 0.0212moles.
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1 MLR3 → 1 MR + 1 LR2
If 23.5 grams of MLR3 react, how many moles of MR are produced?
Calcular una solución que contiene 250 g de cloruro de calcio en 1500 mL de solución y tiene una decidad de 1,2gr/ml
Answer:
13.89% p/p
Explanation:
El porcentaje peso a peso de una solución (%p/p) es definido como cien veces la relación entre la masa del soluto (En este caso, cloruro de calcio) y la masa de la solución. La ecuación es:
%p/p = Masa cloruro de calcio (250g)/ Masa solución * 100
Para hallar la masa de la solución debemos usar el volumen y la densidad de este:
1500mL * (1,2g / mL) = 1800g
Así, el %p/p será:
250g / 1800g * 100
13.89% p/pWhat is the percentage by mass of sulphur in Al2(SO4)3[A12SO4 =
342g/mol, S = 32]
Answer: The percentage by mass of sulphur in [tex]Al_2(SO_4)_3[/tex] is 9.36%
Explanation:
Mass percent of an element is the ratio of mass of that element by the total mass expressed in terms of percentage.
[tex]{\text {Mass percentage}}=\frac{\text {mass of sulphur}}{\text {Total mass}}\times 100\%[/tex]
Given: mass of sulphur = 32 g/mol
mass of [tex]Al_2(SO_4)_3[/tex] = 342 g/mol
Putting in the values we get:
[tex]{\text {Mass percentage}}=\frac{32g/mol}{342g/mol}\times 100\%=9.36\%[/tex]
The percentage by mass of sulphur in [tex]Al_2(SO_4)_3[/tex] is 9.36%
answer 1-5 of lesson outline for brainiest
Answer:
see explanation
Explanation:
1. mid-ocean ridge
2.gravity
3.normal,reverse
4.cools
5.stripes
6.spreading
7.continents
HELP GUYS PLEASE IM SUPPOSED TO ANSWER THIS VERY QUICKLY PLEASE
Answer:
Explanation:
It is b
In the following molecules, the primary intermolecular attractive force is
Answer:
Dipole-dipole
Explanation:
What is true of an Arrhenius base?
O A. An Arrhenius base produces OH" ions.
O B. An Arrhenius base accepts OH ions.
O c. An Arrhenius base accepts H+ ions.
O D. An Arrhenius base produces H+ ions.
Answer:
produce OH-
Explanation:
A mass of 80 grams of Bromine would be
IBNEED HELP ASAP
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Answer:
god says dont use any assault language okay?
Explanation:
How would you prepare a 35 ml solution of 95% (volume/volume solution of ethanol?
Explanation:
Solutions. 1. If 47 g of KCl dissolved in enough water to give 375 mL of soloution, what is the molarity ... vo volume of solute . ... v/v ethanol, how much 95% v/v ethanol ... prepare 200. mL ...
what is the energy that can transform from one thing to another
Answer:
Energía geotérmica (calor → energía eléctrica) Motores térmico, como el motor de combustión interna utilizado en automóviles o el motor de vapor (calor → energía mecánica) Energía térmica oceánica (calor → energía eléctrica) Represas hidroeléctricas (energía potencial gravitacional → energía eléctrica)
Explanation:
Answer:
One type of energy can change into another type of energy. Energy transformation means the changing of energy from one type to another, e.g. from kinetic energy to electrical energy, or from potential energy to kinetic energy.
Explanation:
why an indicator is a necessary part of the titration experiment?
Answer:
In a titration, you determine an unknown concentration of a sample by adding a second reactant of known concentration. In many titrations, you use a chemical called an indicator, which lets you know when the titration finishes.
Explanation:
I need help please!!
Answer:
BECAUSE OF DENSITY
Explanation:
Answer:
It's DENSITY
Explanation:
YOURE WELCOME
Energy pyramid worksheet
Answer:
From top to bottom coyote, crow, squirrel, then acorn
Explanation:
The coyote has the least amount of energy and its the biggest predator so it belongs at the top. The crows eat squirrels and the squirrels eat acorns.
while in another country, you should always find out the voltage that is used in that counrrg
Answer:
Yes I agree
Explanation:
what are the two components of a solution
What is hydrochloric acid used for?
Cleaning
Warfare
Middle school science class
to make glue
Answer:
To make glue. aaaaaaaaa
Answer:
Cleaning
Explanation:
Hydrochloric acid is an ingredient in household cleaners because it helps clean tough stains.
how to obtain pure aluminium oxide from sodium aluminate. pls help.
Answer:
By Bayer process.
Explanation:
In the Bayer process, bauxite ore is heated in a pressure vessel along with a sodium hydroxide solution (caustic soda) at a temperature of 150 to 200 °C. At these temperatures, the aluminium is dissolved as sodium aluminate (primarily [Al(OH)4]−) in an extraction process.
Newton's third law of motion is summarized as the law of action-reaction. For every action, there is an equal but opposite reaction. Which example best illustrates the application of Newton's law of action-reaction? Choose all that apply.
Answer:
When we stand on the floor, we apply a force on the floor surface in the downward direction and in return the floor also exerts an upward and equal force on us.
Explanation:
Newton' third law is vey famous and it states that for each and every action, there applies an equal but opposite reaction. Thus the action force and the reaction force always acts on pairs. But they does not contribute to the motion of the object.
One such example that illustrates the action and reaction force from Newton's law is when we stand on the floor we exert a force on the floor surface in downward direction. The floor surface also exerts an opposite and equal force on us in the upward direction.
Mg(s) + HCl (l) --> H2 (g) +MgCl2 (s) A student conducted an experiment with 2g of magnesium and 3 mL of 6M hydrochloric acid. Equal volumes (3mL) of hydrochloric acid and magnesium strips (2g) were put into each tube. What are the reactants in this reaction?
Answer: Do you have an image so I can solve it?
What is the pH of a 1.0 x 10-2 M HNO3 solution?
How many molecules of N204 are in 85.0 g of N2O4?
Answer:
5.56 × 10^23 molecules
Explanation:
The number of molecules in a molecule can be calculated by multiplying the number of moles in that molecule by Avagadro's number (6.02 × 10^23)
Using mole = mass/molar mass
Molar mass of N2O4 = 14(2) + 16(4)
= 28 + 64
= 92g/mol
mole = 85.0/92
= 0.9239
= 0.924mol
number of molecules of N2O4 (nA) = 0.924 × 6.02 × 10^23
= 5.56 × 10^23 molecules