Answer:
True, some molecules have the same molecular formula as their empirical formula.
Explanation:
The empirical formula of many compounds may be the same. Formaldehyde, for example, has the chemical formula CH2O, which is equal to the empirical formula of glucose. Each molecule of formaldehyde has one carbon atom, two hydrogen atoms, and one oxygen atom.
101. During the making of steel, iron(II) oxide is reduced to metallic iron by treatment with carbon monoxide gas.
FeO (s) + CO (g) Fe ( s)
Suppose 1.45 kg of Fe reacts. What volume of CO(g) is required, and what volume of CO2(9) is produced, each measured at STP?'
Explanation:
At a certain temperature, iron (II) oxide, FeO, can react with carbon monoxide, CO, to form elemental iron, Fe, and carbon dioxide, CO2. The value of Kp at that temperature is 0.242. What is the pressure of CO2 at equilibrium if a sample of FeO was initially in a container with CO at a pressure of 0.95 atm? The chemical reaction involved in this process is: FeO(s) + CO(g) ⟷ Fe(s) + CO2(
What is the number of moles of kf in a 29-gram sample of the compound.
Given
Weight of pottasium fluoride (KF) = 29 gms
To find
Number of moles of pottasium fluoride = ?
Solution
we know that molar mass of KF = 58.0967 g
Now,
[tex]number \: of \: moles = \ \\ \frac{given \: weight \: of \: subtance}{molar \: mass} [/tex]
Number of moles = 29/58 = 0.5 moles
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Answer: 0.50 mol
Explanation:
if you solve you get choice 3 (0.50)
Are two atoms of the same element identical?
Answer:
No they are not identical.
Explanation:
They are not identical because there are many ranges of states that the electrons could have.
I hope it helps! Have a great day!
Muffin ^^
Answer:
No.
Explanation:
It could vary so it wouldn’t be identical.
I hope it helps! Have a great day!
bren~
Telescopes PLS missing words i've done most of it but stuck on two pls help
Answer:
A objective
B occular body
C Light Gathering
D Magnifying images
E Improving resolution
F Climate controlled
G Distortion
H Temperature
giving brainliest help.
Answer:
Increases
Explanation:
I have an A in science I did this
In general, as the temperature of a solution composed of a gas in a liquid is increased, the solubility of the gas decreases
This is because the solvent in a solution cannot to accommodate gaseous solute in it and gas bubbles out, hence the reason why the solubility of the gas decreases
What is solubility?This can be defined as the degree in which a substance dissolves in a solvent in order to make a solution
So therefore, in general, as the temperature of a solution composed of a gas in a liquid is increased, the solubility of the gas decreases
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A 350. mL air sample collected at 35°C has a pressure of 550. torr.
What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?
[tex]\tt \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
T₁ = 35 + 273 =308 K
T₂ = 57 + 273 =330 K
550.350/308 = P₂.425/330
P₂ = 485.29 torr
what is that abbreviated electron configuration for cobalt?
Answer:
[Ar][tex]4s^{2}3d^{7}[/tex]
Explanation:
To write abbreviated electron configurations, begin with the element of interest and work your way down in atomic numbers to the next smallest noble gas.
Write the noble gas symbol in [brackets] and then write the electron configuration as you would normally.
I hope this helps you
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Why does the color absorded by a solution differ from the color of the solution.
Answer:
The size of the particle has a color effect in Rayleigh scatter, but that is unrelated to your question. In the visible spectrum, the main factor determining the color is electronic transitions in the atoms and molecules which make up the substances.
For very simple compounds, it is relatively easy to determine the absorption bands. The bands could possibly change in solution because the electrical environment of the compound’s molecules could change while in solution with water’s polar molecules. However, in many cases, the bands only change slightly so that a purple crystal for example might remain a purple color in aqueous solution.
Some compounds are very sensitive to ionization and to the pH of the aqueous solution, and for these compounds you may see large color shifts as they go into solution.
Help!!!! Its a chemistry question Please Take a look at the following chemical reaction and data table provided.
What mass of water is expected to be produced in the reaction above?
Answer:
The third one is the answer.
is dimensional analysis the same thing as unit conversions?
Answer:
The answer is no
Explanation:
the factor-label method, also known as the unit-factor method, is a widely used technique for such conversions using the rules of algebra.
Name two properties that make solutions different from colloids.
Answer:
1. the apperance of a solution is clear while that of a colloid is dull
2. colloids are heterogenou while solutions are homogenous
the central part of an atom is what
Answer:
Nucleus
Explanation:
the nucleus is the central part of an atom where protons and neutrons are held together.the Nucleus is the central core of the atom, around which the electrons (negatively charged subatomic particles) orbit.What are some good puns about elements in chemistry?.
Answer:
When all the elements die, we Barium!
Ugh, I need to zinc of new Chemistry puns…
Oxygen and Magnesium are going out? O Mg!
Don't trust atoms! They make up everything!
earth overshoot day was september 23 2008. what does that mean?
Answer:
Earth Overshoot day is the day when Earth is projected to have a demand for ecological services and resources that exceeds what is possibly sustainable.
Explanation:
The demand placed on Earth is not sustainable long term.
Name the elements that make up lithium hydroxide.
Answer:
Lithium, oxygen, and hydrogen.
What Is Chromium: Chemical Formula Of Sodium Bicarbonate
Uses Of Cotton: Acetone Formula
Solution Examples: Amino Acid Formula
Explanation:
HOPE ITS HELP;)
mention roles played by Moses
Answer:Each event in the journey from Egypt to Mount Sinai, where God delivers his laws to the Israelites, propels Moses further into the roles of prophet, priest, ruler, and savior of Israel. Moses' most heroic virtue is his steadfast obedience, and it might be said that a passive quality permeates each of his miracles.
Explanation:
2. If you are given the mass of a reactant in grams and want to calculate the mass of
a product in grams, what are the three steps of the calculation you must perform?
Answer:
1. Convert given mass of reactant to moles.
2. Convert moles of reactant to moles of product using the coefficients in the balanced equation.
3. Convert moles of product back to grams of product
Explanation:
In order to find out the mass of a given product in grams you would have to convert the grams into moles by multiplying 1 mole over the given mass of the reactant. Then, you would convert the moles of the reactant into moles of the product using mole ratio. And lastly, you would multiply by the mass of the product to calculate the mass back to grams.
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Please help me I’m very very lazy-(Science)
Answer:
this one is a little tricky but i would have to say A. please correct me if im wrong
Explanation:
Answer:
A
Explanation:
Producers are plants while consumers eat other things to get energy, like us
Which heats up the fastest? treated glass, aluminum, stainless steel, or copper?
Answer:
stainless steel
Explanation:
stainless steel would heat up fast because it is made of metal
Calculate the percent mass of a solution of 5 g NaOH in 95 g of H2O.
Answer:
=50g NaOH) then,no.of moles of the NaOH solution=50g/40g=1.25 moles/litre
Explanation:
answer=50g NaOH
Four glass tanks contain water. In which tank is the pressure of the water on the base greatest.
Exactly how many gallons are in a 1 gallon jug of water?.
A bolt of lightning strikes the ground 3.5 km (2.2 mi) away and is followed by a crack of thunder. Thunder has a frequency of around 100 Hz and a wavelength of approximately 3.5 m. Use this information to answer the following questions.
i. How long does it take for the light to reach your eye? (2 points)
ii. What will the delay be between lightning flash and thunder boom? (2 points)
iii. Would low-frequency sound waves such as thunder most likely be studied using quantum mechanics or classical mechanics? What would be used to study lightning? (1 point)
Answer:
Explanation:
speed=350
spee=d/t
t=distance/speed
3500m/350=10sec
It will take 10 seconds for the light to reach your eye.
speed=350
spee=d/t
t=distance/speed
3500m/350=10sec.
Why is there a postponement among lightning and thunder?Thunder and lightning all occur because of the discharge of power – thunder is a soundwave, and lightning is the emission of electromagnetic electricity. The cause we see a flash of lightning earlier than hearing thunder is because light travels quicker than sound.
If you rely on the variety of seconds among the flash of lightning and the sound of thunder and then divide with the aid of 5, you will get the gap in miles to the lightning: five seconds = 1 mile, 15 seconds = three miles, 0 seconds = very close. keep in mind that you ought to be in a secure place at the same time as counting.
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A student wants to prepare 250.0 mL of a 0.754 M HCl solution, starting with a 11.7 M HCl solution. How much of the 11.7 M HCl solution is needed
How is pomace related to the apple and yogurt industries? (1 point)
Pomace is a waste material from apple juice production that can be added to yogurt to boost nutritional value.
Pomace is a chemical from apples that can be used to remove non-nutritional products from yogurt.
Pomace is a waste material from yogurt production that can be added to apples to boost nutritional value.
Pomace is a chemical from yogurt production that can be used to purify waste from apple juice production.
Pomace is a waste material from apple juice production which can be used in yogurt industry in order to increase more nutrients.
What is relation of pomace to apple and yogurt industries?Pomace is a waste material that can be extracted after apple juice production. It can be added to yogurt to boost nutritional value. Apple pomace is also used to produce pectin, ciderkin, a weak cider, as well as white cider so we can conclude that Pomace can be used in yogurt industry in order to increase more nutrients.
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Answer:
A. Pomace is a waste from Apple production that can be added to yogurt to increase nutritional value.
Explanation:
Just took the test.
A state government is trying to decide between using windmills or a nuclear
power plant. What advantage does nuclear power have over wind power?
O A. Nuclear power uses the kinetic energy of wind.
B. Nuclear power can produce electricity in any weather.
O C. Nuclear power produces less waste.
D. Nuclear power produces more greenhouse gases.
SUBMI
Answer:
B. NUCLEAR POWER CAN PRODUCE ELECTRICITY IN A Y KIND IF WEATHER.
Help me please!!!( ꈍᴗꈍ)
Answer:
Vapour pressure
Explanation:
For liquids
[tex]\\ \rm\Rrightarrow V_p\propto T[/tex]
If vapour pressure increases temperature increases.If vapour pressure decreases temperature decreases1. Organelles in prokaryotic cells include the
(a) mitochondria.
(b) cytoskeleton.
(c) Golgi complex.
(d) none of the above
What influences ionisation energy
Answer:
What are the trends of ionization energy?
Ionization energy is the minimum energy required to remove an electron from an atom or ion in the gas phase.
The most common units of ionization energy are kilojoules per mole (kJ/M) or electron volts (eV).
Ionization energy exhibits periodicity on the periodic table.
Explanation:
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Can you use your plot to predict the absorbance of a 214 mm solution of nickel(ii) chloride and why?.
The absorbance of the 214 mm solution of nickel(ii) chloride can be obtained by fitting it into the regression line of the calibration curve.
What is a calibration graph?During measurements of the concentration of a solution using a spectrophotometer, it is conventional to first calibrate the instrument. The calibration is done by measuring the absorbance of various concentrations of the test solution after measuring the absorbance of the sample blank.
After the instrument has been calibrated, the absorbance of any test solution can now be obtained by fitting it into the regression line of the calibration curve.
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