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Answer:

D.) Atoms.

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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.

Answer:

The coeffeceient

Explanation:

Answer:

non metals are elements and elements are pure substances

Explanation:

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.

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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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.

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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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.

Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:

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Answer:Between the stirring vortex and the side of the glassware

When using a ph meter to monitor a stirring reaction mixture, the ph sensor electrode

should be placed;

between the stirring vortex and the side of the glassware.

The pH meter is an electric device that is used to measure the hydrogen-ion activity in water-based solutions. This means that it is used to measure the PH which is the acidity or alkalinity.

The pH meter is made up of a voltmeter attached to a pH-responsive electrode and a reference electrode.

Now, this pH-responsive electrode is usually made of glass while the reference electrode is usually a silver–silver chloride electrode.

Now when monitoring the stirring reaction mixture, the PH-responsive electrode written above is usually placed between the stirring vortex and the side of the glassware.

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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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Answer:

No.

Explanation:

The person giving the dosage should make sure there is a proper dosage. The syringe only tells you how much there is in the syringe.

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.

Answer:

141 ml

Explanation:

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Answer:

A dunes windward side is the side where the wind is blowing and pushing material up. A dunes slip face is simply the side without wind. A slipface is usually smoother than a dunes windward side. A collection of dunes is called a dune belt or dune field.

Explanation:

Hope this helps...

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

Answer:

One gallon of muriatic acid

Explanation:

i think

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

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

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

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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Answer:

That has no fixed shape but it have fixed volume.

Answer:

identify two ways in which carbon-12, carbon-13, and carbon-14 are alike. they each have 6 protons and neutrons and they're all carbon atoms. what is a chemical compound?

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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Answer:

milk, lemon juice, toothpaste and baking soda

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

Answer: Gravity i think

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.

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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Answer:

Atomic mass

Explanation:

It is the unit used o express atomic and molecular weights.