Answer:
H
Explanation:
b/c the polyatomic PO4¯³
have 3 valance number
How are you able to light a bunsen burner
Answer:
Lighting Bunsen Burner:
Explanation:
Close needle valve and collar. Open gas valve fully. Open needle valve 1/2 turn. Use the spark/lighter to light the flame.
9. Which of the following is a chemical property of water at 4°C? its temperature its state its color
What is the atomic number of an isotope with the following symbol:
20 F
Answer:9
Explanation:
F is Flourine on the periodic table; the atomic number of Flourine is 9
caution: when you say “20 F” your meaning is unclear. regardless of what you mean, though, the atomic number of F is 9
explain nature
have a great day
Answer:
The phenomena of the physical world at together which includes plants, animals, the landscape, and other features and products of earth as opposed to humans or human creations
Percentage of isotopes in 35/17 Cl and 37/17 Cl with the molar mass of chlorine as 35.5g and the mass of each nucleon to be 1.0000 amu
Answer:
The abundance of 35/17 Cl is 75% and 25% of 37/17Cl
Explanation:
The molar mass of an atom is defined as the sum of the masses of each isotope times its abundance, that is:
35.5amu = 35amu*X + 37amu*Y (1)
Where X is the abundance of the 35/17Cl and Y the abundance of 37/17 Cl
As there are just these 2 isotopes and the abundances of both isotopes = 1:
X + Y = 1 (2)
Replacing (2) in (1):
35.5 = 35X + 37(1-X)
35.5 = 35X + 37 - 37X
-1.5 = -2X
X = 0.75 = 75%
And Y = 100-75% = 25%
The abundance of 35/17 Cl is 75% and 25% of 37/17ClWhat is the most common oxidation number for group 3 on the periodic table?
Answer:
español
Un elemento del grupo 3 es un elemento situado dentro de la tabla periódica en el grupo 3. Los átomos de estos elementos tienen gran tendencia a oxidarse y son muy reactivos, predominando el estado de oxidación +3. Presentan propiedades muy similares al aluminio. Dan lugar a iones incoloros.
ingles
An element of group 3 is an element located within the periodic table in group 3. The atoms of these elements have a great tendency to oxidize and are very reactive, with the +3 oxidation state predominant. They have properties very similar to aluminum. They give rise to colorless ions.
Explanation:
ingles
Group -> 3
Group -> 3Period
Group -> 3Period4 21
Group -> 3Period4 21Sc
Group -> 3Period4 21Sc5 39
Group -> 3Period4 21Sc5 39Y
Group -> 3Period4 21Sc5 39Y6 57
Group -> 3Period4 21Sc5 39Y6 57The
Group -> 3Period4 21Sc5 39Y6 57The7 89
Group -> 3Period4 21Sc5 39Y6 57The7 89Ac
español
Grupo -> 3
Grupo -> 3Periodo
Grupo -> 3Periodo4 21
Grupo -> 3Periodo4 21Sc
Grupo -> 3Periodo4 21Sc5 39
Grupo -> 3Periodo4 21Sc5 39Y
Grupo -> 3Periodo4 21Sc5 39Y6 57
Grupo -> 3Periodo4 21Sc5 39Y6 57La
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89Ac
This image shows
an example of
petrified wood.
How did this fossil
form?
A. it formed in amber
B. it formed in asphalt
D. it formed by petrifaction
C. it formed in ice
Copyright © 2003-2021 Acellus Corporation. All Rights Reserved.
Answer:
D. it formed by petrifaction
Explanation:
Petrifaction is the process of petrifying, fossilizing, or preserving wood; hence, "petrified wood."
Un camion que circula a 90 km hora frena uniformemente con una aceleracion de -5 metros por segundos al cuadrado
Answer:
no habla espanol
Explanation:
Which of the following might be included in a chemical
reaction?
a
Molecules
blons
Pure elements
d
All of the above
Answer:
b) ions
Explanation:
Answer: all of the above
Explanation:
A sample of gas at 3000.0mmHg inside a steel tank is cooled from 500.0°C to 0.00°C what is the final pressure of the gas in the steel tank
Answer:
1429.32 mmHg
Explanation:
Initial Pressure P1 = 3000.0mmHg
Initial Temperature T1 = 500.0°C + 273 = 573 K ( Converting to kelvin temperature)
Final Temperature T2 = 0.00°C + 273 = 273 K ( Converting to kelvin temperature)
Final Pressure P2 = ?
The pressure of a given amount of gas is directly proportional to the absolute temperature provided volume remains constant.
This is given by the mathematical expression;
P1 / T1 = P2 / T2
Inserting the values;
3000 / 573 = P2 / 273
P2 = 273 * 3000 / 573
P2 = 1429.32 mmHg
An average, how many eggs does a female release each
cycle?
Answer:
At birth, there are approximately 1 million eggs; and by the time of puberty, only about 300,000 remain. Of these, only 300 to 400 will be ovulated during a woman's reproductive lifetime. Fertility can drop as a woman ages due to decreasing number and quality of the remaining eggs.
Explanation:
Hope This Helps!!
Answer:
One egg per month usually .
Explanation:
This is the single egg that makes it through the whole ovulatory process
3. Among the pairs of organic compounds below. Which is
a. water, lubricating oil b. kerosene, liquefied perde
Answer:
A is the right answerA is the right answerA is the right answerA is the right answer
Explanation:
Which chemical equation correctly represents the reaction that takes place when nitrogen gas and hydrogen gas are formed as ammonia decomposes? (4 points) a N(g) + H3(g) → NH3(g) b 2N(g) + 3H2(g) → 2NH3(g) c 2NH3(g) → N2(g) + 2H3(g) d 2NH3(g) → N2(g) + 3H2(g)
Answer:
d. 2NH3(g)-N2(g)+3H2(g)Given the reaction:
2KCIO3(s) - 2KCl(s) + 302(g)
What is the total number of moles of KCIO3(s) needed to
produce 6 moles of O2(g)?
Answer:
4 moles of potassium chlorate must be used to produce 6 moles of oxygen gas.
Explanation:
From the above reaction:
2KCIO3(s) - 2KCl(s) + 3O2(g)
where,
KCl = Potassium Chloride,
O2 = Oxygen
KClO3 = Potassium chlorate
To calculate the number of moles for KClO3
If 3 moles of O2 gives 2 moles of KClO3
then 6 moles of O2 gives 6/3 x 2 = 4 moles of KClO3.
Hence, 4 moles of KClO3 produces 6 moles of O2.
What is moles?Moles are "a unit of measurement for chemicals, just as meters are measurement units for length and grams are measurement units for mass".
What is Potassium Chloride?
Potassium Chloride is a "metal halide composed of potassium and chloride".
What is Oxygen?Oxygen is "an element with atomic symbol O, atomic number 8, and atomic weight 16".
What is Potassium Chlorate?Potassium chlorate is "an important potassium compound that can be used as an oxidizer, disinfectant, source of oxygen, and component in pyrotechnics and chemistry demonstrations".
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Which is element number 10?
Please Help!!
Answer:
Neon is a chemical element with the symbol Ne and atomic number 10. It is a noble gas.
Answer:
Neon is the element which is in serial number 10 in the periodic table.
Neon is one of the noble gases, i.e., they are stable (talking about NOBLE GASES)
what are the elements in the first period
Answer:
Explanation:
There are only two elements in the first period: hydrogen and helium. We can explain why there is less elements in the first row in modern theories of atomic structure.
Answer:
"Hydrogen and Helium". Hydrogen and Helium are the elements of the first period in the modern periodic table.
Explanation:
What colour change would you notice with China rose indicator when you add it to soap water and vinegar?
HEEELPPP!!
Explain the difference between ionic and covalent bonding using the following term(s)
A. Electronegativities
B. Types of atoms bonding
Answer:
Explanation:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
2 SO2 + O2 + 2H2O ----> 2H2SO4 what reaction is this?
Answer: This type of reaction is a synthesis reaction.
Explanation: Reaction information:Sulfur Dioxide + Dioxygen + Water = Sulfuric Acid
If I balanced it, it would be 2SO2 + O2 + 2H2O → 2H2SO4
Aluminium can be manufactured from the electrolysis of a molten mixture of aluminium oxide and
cryolite. In this process, which electrode must be continually replaced
Answer:
The carbon anode
Explanation:
The carbon anode is continually replaced because it burns off as carbon IV oxide gas by reacting with the oxygen had produced at the anode.
Name the following:
1. SF6
2. N2O4
3. Cl2O7
4. S2Cl2
Answer:
Solfuric Floride
Nitrodgen Oxide
Clorine oxide
Sulfur Cloride
Explanation:
IM A CHEMISTRY WIZ
How many atoms of each element are present in
Answer:
Three lithium and one nitrogen atoms
What is the molarity of a solution in which 35 mole of AgNO3 is dissolved in 5 L of solution?
Answer:
23
Explanation:
Answer:
0.118m
Explanation:
Where are fusion reactions found
Answer:
In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom. Although nuclear fusion reactions require a lot of energy to get started, once they are going they produce enormous amounts of energy.
Explanation:
need asap!
The boiling point of hydrogen sulfide is low. Explain why.
Sulfur is not nearly as electronegative as oxygen so that hydrogen sulfide is not nearly as polar as water. Because of this, comparatively weak intermolecular forces exist for H2S and the melting and boiling points are much lower than they are in water.
The boiling point of hydrogen sulfide is low because the oxygen atom was stronger electronegative than that of the Sulphur atom, water would be more polar than hydrogen sulphide.
What is polar molecule?If a molecule does have more positive charges on one end than negative charges on the other, an electrical pole has been created. This is how polar molecules are typically formed.
What is boiling point?
The temperature where a liquid's vapor pressure reaches the pressure around it as well as the liquid transforms into a vapor is known as the boiling point of a substance.
The boiling point of hydrogen sulfide is low because the oxygen atom was stronger electronegative than that of the Sulphur atom, water would be more polar than hydrogen sulphide. Additionally, hydrogen sulphide has a lesser melting point as well as boiling point than water due to poor intermolecular forces (dipole forces, Vander Waal's forces).
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A flat plain of cooled lava is created by
ILL GIVE BRAINLIST PLS Question 3 of 5
Rhyolite forms as lava cools very quickly, forming holes.
Sometimes gems can form within the holes. The image
shows fire opal within rhyolite,
Which type of rock is rhyolite?
O A. Intrusive igneous
B. Extrusive igneous
O C. Metamorphic
D. Sedimentary
Answer:
the answer is b........
This artwork took six colors to complete.
Initially, the chalk used had a mass of 323.5 grams but upon completion, it's mass had dropped to 301.2 grams. What is the change in mass?
The intensity of a sound wave increases as the wave spreads out from the source of the sound
Answer:
The more spread out their energy becomes
what is a flame,metion two types of flames
Answer:
A flame is defined as the gaseous part of the fire which is visible to us. A flame is created due to the high exothermic reaction.
Two types of flames based on the amount of oxygen available are:
Non-luminous or blue flame: In this type of flame the amount of oxygen is sufficiently large and it gives blue flame. For example: flame of Gas stove. Luminous flame: In this type of flame, the oxygen availability id not sufficient for the complete combustion and left unburnt carbon particles that forms yellow light flame. For example: kerosene lamp.