Answer:
4 moles of H3PO4
Explanation:
Molar mass of P4O10 = 284 g/mol
Number of moles of P4O10 reacted = 284g/284 g/mol = 1 mole of P4O10
From the reeaction equation;
1 mole of P4O10 yields 4 moles of H3PO4
Hence, 284 g of P4O10 yields 4 moles of H3PO4
describe Transpiration
Answer:
is the process of water movement through a plant and its evaporation from aerial parts, such as leaves stems and flowers.
Answer:
well in easy terms... its just like the loss of water from the leaves or other parts of a plant due to evaporation
Explanation:
Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism.
dino nuggies dino nuggies dino nuggies
Answer:
i love dino nuggies!!!
Explanation:
there fun
Answer:
shut ur goofy as up
Explanation:
PLEASEEE HELP ME
Sulfuric acid is the most produced industrial chemical in the world. The chemical process involves many steps – the final step combines oleum (H2S2O7) with water to produce sulfuric acid (H2SO4). For the first batch of acid production, 1.20 kilograms of oleum is reacted with excess water, and 435 grams of sulfuric acid are produced.
• Write the balanced equation for the formation of sulfuric acid from oleum and water.
• Calculate the theoretical yield of sulfuric acid. Work must be shown to earn credit.
• Calculate the percent yield for the sulfuric acid production. Work must be shown to earn credit
Answer:
Balanced equation: H₂S₂O₇ + H₂O → 2H₂SO₄
Theoretical yield of H₂SO₄: 1322 g
Percent yield for the H₂SO₄ production: 33%
Explanation:
First of all, we determine the balanced equation:
H₂S₂O₇ + H₂O → 2H₂SO₄
Stoichiometry says that 1 mol of oleum reacts to 1 mol of water in order to produce 2 moles of sulfuric acid.
1.20 kg = 1200 g
We convert the grams to moles → 1200 g . 1mol/ 178.12g = 6.74 mol
Ratio is 1:2, so if we have 6.74 mol of oleum we can produce the double of moles of acid. (6.74 . 2) = 13.48 moles of acid.
This is the 100 % yield reaction, or it can be called theoretical yield.
We convert the moles to mass → 13.48 mol . 98g /1mol = 1322 g of acid may be produced.
In the problem, they said we produced 435 g of acid, so let's determine the percent yield.
Percent yield of reaction = (Produced yield / Theoretical yield) . 100
Percent yield of reaction = (435 / 1322) . 100 → 33 %
What charge would you expect for an formed by Ca?
O +1
O-1
+2
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
What is the charge of CA?
2+
Table of Common Element Charges
Number Element Charge
17 chlorine 1-
18 argon 0
19 potassium 1+
20 calcium 2+
88 more rows•Dec 24, 2018
About 55L of a gas in a flexible container is under a pressure of 3.2 atm and at a temperature of 520K. What is the new volume of the gas if the temperature is raised to 760K and the pressure increases to 8.4 atm?
Answer:
30.62 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 55 L
Initial pressure (P₁) = 3.2 atm
Initial temperature (T₁) = 520 K
Final temperature (T₂) = 760 K
Final pressure (P₂) = 8.4 atm
Final volume (V₂) =?
The final volume of the gas can be obtained as follow:
P₁V₁ / T₁ = P₂V₂ / T₂
3.2 × 55 / 520 = 8.4 × V₂ / 760
176 / 520 = 8.4 × V₂ / 760
Cross multiply
520 × 8.4 × V₂ = 176 × 760
4368 × V₂ = 133760
Divide both side by 4368
V₂ = 133760 / 4368
V₂ = 30.62 L
Therefore, the new volume of the gas is 30.62 L
What material was added to powdered rock during tuttle and bowen's experiments?
Answer:
water was added to powdered rock
Explanation:
Density is determined by dividing the __________ of a sample by the __________ of the sample. PLSSSS HELP MEEE!!!
volume; mass
mass; volume
mass; weight
The density of a sample is the ratio of its mass to volume. Thus it is determined by dividing its mass by the volume of the sample. Hence, option b is correct.
What is density?Density of a sample is the measure of its mass per unit volume. It describes how much denser the substance is in a particular volume of the substance. Mathematically it is the ratio of its mass to the volume.
The ratio of density of a substance to the density of water is called its specific gravity. If specific gravity is greater than one then it will sink on water whereas, if it is less than one the substance will float on water.
The density of a substance depends on the mass, volume, bond type, temperature and pressure. Thus, density of a substance vary with difference in temperature or pressure. Density can be expressed in units such as g/ml, g/cm³.
To find more on density, refer here:
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What organelle makes proteins needed to repair damage or direct chemical
processes?
Answer:
ribosome
Explanation:
he ribosome is a cell or vertebrate structure that makes proteins. Proteins are required to direct the functions or functions of many cells, such as repair or chemical processes. The ribosome can be found floating within the cytoplasm or attached to the endoplasmic reticulum.
Which environmental conditions contribute most to the spread of bacteria?
O A. cold temperatures and low humidity
B. warm temperatures and low humidity
oc, cold temperatures and high humidity
O
D. warm temperatures and high humidity
Given 35.0 grams of aluminum at 22.0 °C. What will be the final temperature of the Al if 300.0 joules of heat energy is added to the Al? (The specific heat of Al is 0.217 cal/g°C)
Which of the following is NOT a way unbalanced forces can cause an object to change its motion?
A. changing the object's direction
B. stop the obect from moving
C. the object's motion stays constant
D. start the object moving
what element is most reactive to gas
Answer:
hydrogen
Explanation:
i took chemistry last year a d passed
______ The total number of protons and neutrons in the nucleus.
A. Atomic Number
B. Mass number
C. Atomic mass
And why? I give Brainliest!
Answer:
A. Atomic Number
Explanation:
The mass number is used to calculate the number of neutrons & electrons in one atom of an element. In order to calculate the number of neutrons you must subtract the atomic number from the atomic mass.
The ocean floor, some parts of which get no sunlight, is the *
Answer:
Aphotic zone
Explanation:
One of your chores is to mow the lawn. The lawnmower runs on gasoline. The gasoline
burning is a
and the grass being cut is a
A. physical change, chemical change
OB. chemical change, physical change
C. physical change, physical property
OD chemical property, physical change
B
Explanation:
Burning is a chemical change and cutting grass is a physical change
Chemical change, Physical change. Hence, option B is correct.
What is physical property?A physical property is not related to a change in its chemical composition
A chemical change occurs when one chemical substance is changed into one or more different substances, such as when iron becomes rust.
A physical change occurs when there is change in structure but not in its composition.
Hence, Burning is a chemical change and cutting grass is a physical change.
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If 35.0 grams of coal (carbon) burns in 58.5 grams of oxygen gas, how many grams of carbon dioxide can be produced? Describe the steps.
C + O2 → CO2
Answer:
0.59
Explanation:
Is 0.59 because you are dividing 35.0g by 58.5 which will than give you 0.59
what is public property
Answer:
ur mom
Explanation:
Answer:
the property that is dedicated to public use
A wooden box with a mass of 50 kg in placed on a flat wooden table. What
the horizontal force required to overcome static friction and just cause th
box to slide? us = 0.70 for wood-on-wood. F = uxN
Answer:
is this have picture so I can solve
What is the primary intermolecular force the exist between molecules of carbon tetrachloride?
Answer:
Carbon tetrachloride is non-polar and so the only kind of force that can exist is induced dipole.
Calculate the relative formula mass of sodium hydroxide (NaOH. Na = 23, O = 16, H = 1)
Answer:
40g/mol
Explanation:
Na + O + H
23 + 16 + 1
= 40g/mol
help !!!!!!!!!!!!!!!!!!!
HELP!!!! question 2!!!
Answer:
ionic bonding
Explanation:
In ionic bonding, electrons are completely transferred from one atom to another.
Answer:Ionic bond
Explanation:
Ionic bond involves a complete transfer of electron. For eg. in NaCl, Na gives one of its electron to Cl.
in a chemical equation the symbol that means dissolved in water is
Answer:
I Think it is H2OExplanation: Water is Hydrogen and 2 oxygen 2 being the 2 oxygen molecules then the other molecules like cool-aid or Magnesium
Examples
C6H12O6 + H2O
NaCI + H2O
KCI + H2OCa(OH)2 + H2OMgC12 + H2OHope this helps!
Of the three intermolecular forces, the type
with the largest dissociation energy is
Answer:
Strongest intermolecular force
Hydrogen Bonding (H-Bonding)
Hydrogen bonds are caused by highly electronegative atoms. They only occur between hydrogen and oxygen, fluorine or nitrogen, and are the strongest intermolecular force.
Hydrogen bonds have the largest dissociation energy.
What is hydrogen bond?Hydrogen bond is formed when hydrogen is attached to some electronegative elements like O, N and F.
What is dissociation energy?The dissociation energy is the energy required to break a bond and form two atomic or molecular fragments, each with one electron of the shared pair.
Hydrogen bonds are caused by highly electronegative atoms. They only occur between hydrogen and oxygen, fluorine or nitrogen and are the strongest intermolecular force.
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Why is one type of flame hotter than each other?
Calculate the molarity of a solution prepared by dissolving 13.0 g of Na2CrO4 in enough water to produce a solution with a volume of 800. mL .
Express the molarity to three significant digits.
Answer:
molar mass sodium chromate = 162g
12.6g ÷ 162g/mole = moles sodium chromate (This is the solute)
molalrity or M = moles solute ÷ lliters of solution (You'll have to change given mL to L)
True or false?
Cadmium is in the mixture because they both contain spectral lines at 625nm.
true
We describe the luminescence spectral properties of CdS nanoparticles with multiphoton excitation. Three types of CdS nanoparticles were examined which were a CdS/dendrimer composite which displays high anisotropy, Cd2+-enriched nanoparticles which display two emission maxima, and polyphosphate-stabilized nanoparticles which display long wavelength emission. Illumination with long wavelengths near 700−790 nm resulted in two-photon excitation. Essentially the same emission spectra and intensity decays were observed with one-photon and two-photon excitation. Comparison with fluorescein indicates the NPs display large two-photon cross sections near 100 GM. The CdS/dendrimer and Cd2+-enriched CdS nanoparticles displayed large anisotropy values with two-photon excitation, substantially larger than with one-photon excitation. It appears that semiconductor nanoparticles are comparable to organic fluorophores which display the same spectral properties with one-photon and two-photon excitation.
7. Put the following elements in order from smallest to largest atomic radius and explain
why:
C.0, Sn, Sr
Answer:
O, C, Sn, Sr
Explanation:
As per the periodic table trends, atomic radius of an atom deceases from left to right and increases down a group this is so because across a period or from left to right, number of protons increases that increases the nuclear charge and nuclear radius decreases. Down the group, atomic radius increases because energy level increases and distance between nucleus and outermost orbital increases.
The elements in order from smallest to largest atomic radius are:
O, C, Sn, Sr because as per the periodic table trends, oxygen (O) fall into right side of Carbon (C) in the periodic table and Strontium (Sn) and Tin (Sn) fall into down the group where Tin (Sn) is on the right side of Strontium (Sn).
Hence, the correct order is "O, C, Sn, Sr".
5. What is the charge of an atom that has lost four electrons? *
Answer:
+4
Explanation:
An atom is considered to be neutral before losing or gaining any electrons. They are neutral in charge because they initially have the same number of protons (with charge of +1 each) and electrons (with a charge of -1 each).
Consider charge in an electron like a balance, with positively charged protons on one side and negatively charged electrons on the other. When you have the same number of each, there is equal amounts of positive and negative charge so the atom is neutral with a charge of zero.
For example, potassium has 19 protons, and 19 electrons. This means it has
19 positive charges and 19 negative charges. If you take away one electron, it now has 19 positive charges and 18 negative charges. So there is one more positive charge than negative, which means it is now an ion (a charged atom) with a charge of +1. If you take away two electrons the charge becomes +2... 4 electrons the charge becomes +4.
Select the correct answer from A, B, C, D & E for each statement given below:
A: Anthracite B: Diamond
C: Carbogen D: Urea E: Lampblack
1. An allotrope of carbon used as a tip for deep boring drills.
2. The type of coal with the highest carbon content.
3. An allotrope of carbon, obtained by burning kerosene oil in a limited supply of air.
4. A nitrogenous fertilizer obtained from carbon dioxide.
5. A compound which finds use for a victim of carbon monoxide poisoning.
Answer:
Didn't know the answer, sorry.