Answer
63.55
Explanation:
63
C
u
has
69.2
%
abundance.
65
C
u
has
30.8
%
abundance.
So, the weighted average is
62.93
×
69.2
%
+
64.93
×
30.8
%
I need help.
It measures 10 cm x 5 cm x 2 cm and has mass of 1,930g. What is the density of the gold bar?
Is vegetable soup a homogeneous or heterogeneous mixture
Answer:
heterogeneous
Explanation:
have you ever started to eat veg soup and begin with a spoon full of broth, no veggies,
Then when you get to the end, there are veggies. no broth.
In a homogeneous mixture, every sample is the same
in a heterogeneous mixture, the composition changes from sample to sample
how much muriatic acid to lower alkalinity in pool
Answer:
One gallon of muriatic acid
Explanation:
i think
a liquid can be described as a form of matter that
Answer:
That has no fixed shape but it have fixed volume.
Which subtance are acidic?
Please click above answer.
I will brainless who can answer this all pleaseeeeej
Answer:
1. FALSE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
6. TRUE
7. TRUE
8. TRUE
9. TRUE
10. TRUE
Explanation:
1. Conduction occurs more readily in solids and liquids
2. Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.
3. None
4. Radiation is the fastest mode of heat transfer while conduction is the slowest mode of heat transfer
5. Heat from Sun reaches us by the process of radiation
6. None
7. It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter
8. At a temperature of 0o C, the thermal energy within a given system is also zero
9. None
10. None
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Which set of substances contains only compounds?
Answer:
non metals are elements and elements are pure substances
Explanation:
1. A unit of mass used to express atomic and molecular weights. One proton or
neutron equals one mass unit.
Atom
Atomic mass
Nucleus
Amy
Protons
Neutrons
Uranium
Electrons
Hydrogen
Answer:
Atomic mass
Explanation:
It is the unit used o express atomic and molecular weights.
According to Democritus, which substance cannot be divided?
O A. molecules
O B. matter
O C. compounds
OD. atoms
Answer:
D.) Atoms.
I hope this helps! :)
a car is parked along a level road identify the forces that act upon the car
Answer: Gravity i think
I'll mark brainly pls help
Could someone please help me
Answer:
Whistle 2 has a lower pitch, but is louder.
Whistle 3 has higher pitch and is less loud.
Explanation:
The more frequent the arches are the higher the pitch.
The larger the amplitude the louder the sound is.
;D
2. Describe the difference between:
(a) a group and a period
Answer:
A group is a vertical row on the periodic table and a period is a horizontal row on the periodic table.
Explanation:
Answer:
A group on the periodic table refers to the vertical arrangement of the elements while a period refers to the horizontal rows of elements
Studying the brightness of a star can help scientist determine what part of the life-cycle a star is in. Is this true or false
Answer:
what do you mean?
Explanation:
Studying the brightness of a star can indeed help scientists determine what part of the life-cycle a star is in. The brightness of a star is directly related to its stage in the life cycle.The statement is true.
During the early stages of a star's life, it is formed from a cloud of gas and dust. As the star contracts under its own gravity, it starts to heat up and emits light. This is known as the protostar stage.
As the star continues to contract, it reaches a point where the core temperature becomes hot enough for nuclear fusion to occur. At this stage, the star enters the main sequence phase, where it will spend the majority of its life. The brightness of the star in this phase is determined by its mass. More massive stars are brighter than less massive ones.
As the star ages, it exhausts its hydrogen fuel in the core and begins to evolve. Depending on its mass, a star can become a red giant, a white dwarf, a neutron star, or even a black hole. Each of these stages has a different brightness profile.
By observing the brightness of a star over time, scientists can gather information about its age, mass, and evolutionary stage. This can provide insights into the star's life cycle and help in understanding the processes occurring within it.
Thus, studying the brightness of a star is an important tool for scientists to determine what part of the life cycle a star is in. By analyzing its brightness profile, scientists can gain valuable information about the star's age, mass, and evolutionary stage.The statement is true.
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Can someone make me a periodic table with color?
Answer:
The periodic table is also split into four blocks: s = red, p = green, d = yellow, and f = blue.
a 47.0 ml aliquot of a 0.400 m stock solution must be diluted to 0.100 m. assuming the volumes are additive, how much water should be added?
Answer:
141 ml
Explanation:
why can't you balance CaC2 + H2O > Ca(OH)2 + CH4?
Answer:
Balance The Chemical Equation Cac2 H2o Ca Oh 2 C2h2 Balance the chemical equation CaC 2 + H 2 O → Ca (OH) 2 + C 2 H 2 Calcium carbide react with water to produce calcium hydroxide and acetylene.
Explanation:
CaC2 + H2O > Ca(OH)2 + CH4
Ca + 2 H2O → Ca(OH)2 + H2 - Balanced equation
What is balance equation with example?A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia
What is the balance chemical formula?Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.
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a space probe identifies a new element in a sample collected from an asteroid. successive ionization energies, in attojoules per atom, for the new element are given in the table. i1 i2 i3 i4 i5 i6 i7 0.507 1.017 4.108 5.074 6.147 7.903 8.294 to what family of the periodic table does this new element probably belong?
The element belongs to group 17 of the periodic table.
In the periodic table, elements are arranged in groups depending on their properties. Usually, elements whose atoms have the same number of valence electrons are placed in the same group.
All the elements in group 17 have seven electrons on their outermost shell. Since an ionization energies of the electrons on the valence shell of an atom are always close together, the ionization energies of the seven electrons as shown indicate that they must be on the same shell.
Hence, the new element must be a member of group 17 of the periodic table.
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how many oxygens are used per glucose molecule in glycolysis?
Answer:
0
Explanation:
a) What is the role of protons in an atom?
b) How do we determine how many protons are in an atom?
Answer:
The number of electrons, in turn, determines the chemical properties of the atom.
Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element.
Electrons have a negative charge. Since the atom is electrically neutral, the number of electrons must equal the number of protons.
The electrons arrange themselves in energy levels around the nucleus. The outermost or valence electrons of an atom are the ones that take part in chemical reactions. An element’s chemical properties depend on its valence electrons.
Explanation:
Finalmente responde:
- ¿Cuáles serían las características del agua filtrada que evidencie el funcionamiento del filtrador?
– Consideras que volver a filtrar la misma muestra de agua ¿disminuye la turbidez del agua?,, AYUDAAAAAAAAA
El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.
Los filtros para purificar agua son dispositivos que permiten el limpiado del agua con el objetivo de convertirla apta para consumo humano.En general, los filtros para lograr la purificación del agua consisten de carbón activado, el cual se prensa con alta presión. Este dispositivo de carbón activado permite secuestrar las partículas sólidas que pasan a través del filtro, con lo cual el agua sale a través del filtro completamente purificada.Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:
El agua sale cristalina, es decir, sin ningún tipo de color que evidencie la presencia de contaminación.El pH del agua potable debe oscilar entre valores normales (6,5 a 8,5)No debe contener metales tales como plomo, arsénico o cadmio (altamente tóxicos)No debe contener microorganismosAprende más sobre este tema en:
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any push or pull is called
Answer:
A Force.
Explanation:
A force is a push or pull upon an object resulting from the object's interaction with another object. ... Forces only exist as a result of an interaction.
atoms from different element combine to form
Answer:
new substances
Explanation:
Atoms of different elements can combine to make new substances. A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.
The density of a liquid is 6.0g/cm3 , when it fills a container of volume 300cubic centimeters . What is the mass of the liquid in the container?
Answer:
1800g
Explanation:
b/c d=m/v
m=dv
m=300×6=1800g
The mass of the liquid in the container is equal to 1800 g.
What is the density?The density of an object can be described as the mass per unit volume of the object. The average density of any substance equals the total mass of the substance divided by its total volume.
The mathematical formula of the density can be expressed as follows:
The density of material = Mass/Volume
Mass = density × Volume
The S.I. unit of the density of any substance is Kg/m³ and it is an intrinsic property. If the size of the substance increases, the mass increases as well but the density of the substance will stay constant.
Give, the density of the liquid, d = 6.0 g/cm³
The volume of the container, V = 300 cm³
The mass of the liquid = 6 ×300 = 1800 g
Therefore, the mass of the liquid is equal to 1800 g.
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True or false when heat is added to atoms the molecules vibrate much more slowly
Answer:
false
Explanation:
The particles are held together too strongly to allow movement from place to place but the particles do vibrate about their position in the structure. With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly
Soraya left some soup in the refrigerator. She looked at the soup every day, but she always decided not to eat it. After five days, she started to see mold growing on the surface of the soup. She looked up mold online and found that mold is made of fungal cells. Why didn't Soraya see the mold growing on the soup before the fifth day? Why can she see it now?
Explanation:
In general, the longer that moisture is present, the greater the chance for mold to grow and spread. When mold spores encounter a moist surface, it starts growing within a few hours, spreading into the material while also filling the air with thousands of mold spores.
Write Cadmium nitride formula using criss cross method
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here calcium is having an oxidation state of +2 called as Ca^{2+}Ca2+ cation and NO_3^{-}NO3− is a polyatomic anion with oxidation state of -1.. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral Ca(NO_3)_2Ca(NO3)2
An atom has 7 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.
Explanation:
An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.
The atom described is an anion with -1 charge as it has one extra electron than protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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A space that is totally empty without any matter is called
In 6CH4, we have 6 molecules of CH4. What is the 6 called?
Answer:
The coeffeceient
Explanation: