The student inferred that a chemical reaction occurred what evidence supports this inference

Answer:

Hydrogen is a substance because it has mass and combined with other molecules it can make another substance such as water.

Explanation:

Answer:

A-Have high melting and boiling points

B- Are hard

D- Are good conductors of electricity when dissolved in water

Explanation:

The characteristics of ionic compounds are: have high melting and boiling points ,are hard , good conductors of electricity when dissolved in water.

Explanation:

Properties of ionic compounds

So, from this, we can conclude that from the given characteristics the characteristics of ionic compounds are: have high melting and boiling points ,are hard , good conductors of electricity when dissolved in water.

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Answer:

Answer:

Sep by step to determine the mass of 25 mL of orange juice

Explanation:

Measure mass of container , then add 25 mL of OJ and subtract the difference

Answer:

The temperature of the water affects the amount of dissolving but it also affects the rate of diffusion.

Explanation:

Answer:

Yes, temperature can impact the ability of water to dissolve things, the solubility increases with temperature.

Explanation:

The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

Answer:

to study sub terranian earth movements

Explanation:

8H earth science

Answer:

B-to determine the location of an epicenter

Explanation:

Seismologists study earthquakes by going out and looking at the damage caused by the earthquakes and by using seismographs. A seismograph is an instrument that records the shaking of the earth's surface caused by seismic waves and determine the location of an epicenter

-Source: Geo.mtu.edu

A clear explanation of misconception of sugar is energy and energy is sugar is below.

Sugars are the disaccharide carbohydrate, it means they are formed by the combination of two monosaccharides.

One of the component of the sugar is glucose and we know that glucose is the source of energy in our body. So, sugars are naturally present in many food substance which in turn breaks down in the glucose and their composite constituent and releases energy. But we can never compare sugar as the main source of energy or equivalent to energy.

Hence, Energy means sugar is the misconception.

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Answer:

Electrical conductivity in metals is a result of the movement of electrically charged particles. Because valence electrons are free to move, they can travel through the lattice that forms the physical structure of a metal.

Explanation:

Answer:

Half life = 1.83 sec

Explanation:

Given data:

Total amount of Ar-35 = 1.80 g

Amount left after 5.49 sec = 0.225 g

Half life of Ar-35 = ?

Solution:

At time zero = 1.80 g

At first half life = 1.80 g/2 = 0.9 g

At 2nd half life = 0.9 g/2 = 0.45 g

At 3rd half life = 0.45 g/2 = 0.225 g

Half life:

Half life = Time elapsed / number of half lives

Half life = 5.49 sec / 3

Half life = 1.83 sec

Answer:

The C. Heat

Explanation:

It is logical, when you workout you feel hot cause your body emanates heat

Explanation:

the answer is letter A. mitosis

Answer:

Zirconium has 40 protons and 51 neutrons

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

volume = final volume of water - initial volume of water

volume = 36.5 - 31.4 = 5.1 mL

But

1 mL = 1 cm³

5.1 mL = 5.1 cm³

From the question we have

[tex]density = \frac{75}{5.1} \\ = 14.705882..[/tex]

We have the final answer as

Hope this helps you

Answer:

148 g H₂SO₄

General Formulas and Concepts:

Chemistry - Stoichiometry

Explanation:

Step 1: Define

RxN:   Ca(OH)₂ + H₂SO₄ → CaSO₄ + H₂O

Given:   3.01 moles H₂O

Step 2: Balance RxN

Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O

Step 3: Define conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂SO₄ - 2(1.01) + 32.07 + 4(16.00) = 98.09 g/mol

Step 4: Stoichiometry

[tex]3.01 \ mol \ H_2O(\frac{1 \ mol \ H_2SO_4}{2 \ mol \ H_2O} )(\frac{98.09 \ g \ H_2SO_4}{1 \ mol \ H_2SO_4} )[/tex] = 147.625 g H₂SO₄

Step 5: Check

We are given 3 sig figs. Follow sig fig rules.

147.625 g H₂SO₄ ≈ 148 g H₂SO₄

Answer:

all of the above

Explanation:

Answer: All of the above

Explanation:

Answer:

mass in a given volume

Explanation:

Density is the mass in a given volume or mass per unit volume of a substance.

Mass is defined by the amount of matter present in a substance.

Volume is the space occupied by a body.

Mathematically;

                      Density  = [tex]\frac{mass}{volume}[/tex]  

Answer:

The potential energy of the two vehicles increased because they were moved against the magnatic forces. The potential energy of the pink car increased more then the potential energy of the purple car because the pink car was closer to the center magnet.

Explanation: I had this same exact question on a quiz and this was my response and I got a 100%

The effects of the movement of the cars closer to the center of the magnet are ;

A) The potential energy of the Two vehicles will be increased

B) The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.

Potential energy is the energy contained in a body at rest, The increase in potential energy occur when an object continues to be at rest ( i.e. opposes movement ).

When the cars are moved closer to the center magnet the cars will oppose the motion because their movement is against the magnetic forces that exist between the center magnet and the cars ( i.e. like pole repel while unlike poles attract ).  so as Lucia moves the cars closer their potential energies will continually increase ( i.e. the closer the car the higher its potential energy ).

Therefore the pink car been closer to the center magnet will experience a higher change in its potential energy than the purple car.

Hence we can conclude that The effects of the movement of the cars closer to the center of the magnet are ;  The potential energy of the Two vehicles will be increased, The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.

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Answer:

33300J

Explanation:

Given parameters:

Mass of ice  = 100g

Unknown:

Amount of energy = ?

Solution:

This is a phase change process from solid to liquid. In this case, the latent heat of melting of ice is 3.33 x 10⁵ J/kg.

 So;

            H  = mL

m is the mass

L is the latent heat of melting ice

  Now, insert the parameters and solve;

            H = mL

 mass from gram to kilogram;

            100g gives 0.1kg

  H = 0.1 x 3.33 x 10⁵ = 33300J

Friction causes the molecules on rubbing surfaces to move faster, therefore they have more energy. This gives them a greater temperature, and they feel warmer.

The term friction is defined as the resistive force that occurs when two bodies in contact move relative to one another.

Adhesion between body surfaces, and the adhesion is the molecular force that occurs when two materials come into contact with each other are the causes of friction.

Friction is an everyday force that is generated by two surfaces when they are interacting. When these surfaces slide against each other, this interaction increases the thermal energy of the two surfaces.

Thus, Friction causes the molecules on rubbing surfaces to move faster, therefore they have more energy.

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Answer:

C. transition elements

Explanation:

Transition elements are groups of metallic elements that have partially filled d orbitals. They occupy the d-block of the periodic table (Group 3-12). Examples of elements that fall under this category are Nickel (Ni), Cobalt (Co), Copper (Cu), Zinc (Zn) etc. Transition metals have outstanding properties that distinguishes them from other elements.

One of these properties is their ability to form colored compounds due to their unfilled d electron shells. They form ions that are usually colored in solid compounds and in solution.

The elements that have been colored in the solid and solution have been transition elements.Thus, option C is correct.

The periodic table has been consisted of metals, non-metals, and metalloids. The presence of valence electrons of the elements has been responsible for the chemical properties of the elements.

The transition elements have been the metals that have been consisted of electrons in the d orbitals. The presence of electrons results in the atom to excited to higher energy and have radiations in the visible region.

Thus, the aqueous and solid transition elements have been colored. Thus, option C is correct.

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Answer:

One object could have more particles and greater total kinetic energy

Explanation:

The higher the temperature the more the particles. So, when we have high temperature, there is more particles interacting.

Temperature can simply be defined or gotten by taking the average of of the kinetic energy of the particles in the object that is the keywords here are TAKING THE AVERAGE KINETIC ENERGY

Thermal energy is the energy that can be gotten from adding up all the total kinetic energy of the particles in the object. So, the keywords here are; ADDING UP THE TOTAL KINETIC ENERGIES.

So, when two particles of the same temperature have the different thermal energy it means that One object could have more particles and thus having greater total kinetic energy.

Answer:

Molecular formula, C8H16O4; empirical formula, C2H4O

Explanation:

When there is just one atom of an element in a molecule, no subscript is used in the chemical formula.

Answer:

Explanation: The pyramid model of four level in an organization is based on and is depends on the various levels of the hierarchy systems or management in the organization. These four level is of different types of the Information System in the organization.

Explanation:

Answer:

Properties of seismic waves

Explanation:

Most of the inferences about the characteristics of earth's mantle and core are based on the properties of seismic waves.

Answer:

In equation form, Newton's second law of motion is a=Fnetm a = F net m . This is often written in the more familiar form: Fnet = ma. The weight w of an object is defined as the force of gravity acting on an object of mass m. ... Friction is a force that opposes the motion past each other of objects that are touching.

Explanation:

have a nice day :)

Answer:

c- subduction zones

Explanation:

Answer:

Spring tides have higher high tides and lower low tides whereas neap tides have lower high tides and higher low tides.

Explanation:

Answer:

Spring tides have higher high tides and lower low tides whereas neap tides have lower high tides and higher low tides. Hence, the range (difference in water level between high and low tide) is much larger in a spring tide than in a low tide.