The chief advantage of the metric system over other systems of measurement is that it ____.

A. has more units
B. is in multiples of 10
C. is in multiples of 15
D. is derived from nature itself

yes i think so i think

No, mass is not conserved in a chemical reaction.

Burning wood is a chemical change.

Among the given options, burning wood is an example of a chemical change as it leads to the formation of new substances, namely, carbon dioxide, water vapor, and ash.

The correct option for an example of a chemical change among the given choices is burning wood. Chemical change involves forming new substances with new properties. In the process of burning wood, wood (cellulose) reacts with oxygen in the air to form carbon dioxide, water vapor, and ash, which are completely different substances from the original wood and oxygen. The other three options, filtering a mixture, boiling water, and crushing a can, are physical changes because they do not result in any new substances being formed; they only change the state, shape, or appearance of the substance.

https://brainly.com/question/31633022

#SPJ2

Alicia took half of her salary which is $42.15. So the total amount of her salary is $84..30.

Therefore, x-$42.15 ≥ $20.00

$84.30/x ≥$62.15

The amount of Alicia check is [tex]X[/tex].

Amount spent on dinner = [tex]\$42.15[/tex]  (given)

Amount brought to home = more than [tex]\$20.00[/tex]  (given)

The above information can be written in equation as:

[tex]X - \$42.5 > \$20.00[/tex]

Solving for [tex]X[/tex] as:

[tex]X > \$20.00 + \$42.15[/tex]

[tex]X > \$62.15[/tex]

Hence, inequality to represent the situation is [tex]X > \$62.15[/tex].

A political map is a kind of map which contains a north arrow, key and a map scale.

This kind of map usually indicates the governmental boundaries of countries, states, or any counties,

And, they give information about the location of major cities, also they usually include significant bodies of water.

Answer:

Political maps contains north direction, key and scale of map

Explanation:

Map is the two-dimensional representation of the earth showing its various features and locations along with proper latitude and longitude. It has different types of maps, of which the physical maps are widely used. Political maps are those maps in which the countries are separated by distinct boundaries. It is widely used to determine the location of any particular place on earth. It highlights the countries with different colors with various colors excluding blue because the blue color is used to represent the water bodies on earth.

These political maps are comprised of keys, the north direction and the scale of the map.

The nucleus of the atom is the region which is surrounded by orbits of electrons around it. The central area of the atom is called as its nucleus which usually contains protons and neutrons in it. These are called subatomic particles of the atom, which includes proton, electron and neutron.

Protons are positively charged species, neutrons are neutrally charged they do not have any charge on it whereas electrons are negatively charged species. The number of protons and electrons is same in a particular specific elemental atom.

Each compound particle contains 1 atom of element A. However, not all atoms of element B are used, signifying that some are left over after the compounds are formed.

In this case, the question is looking at how atoms of element A and element B are combining to form 6 compounds. If we break down the numbers, 6 atoms of A combine with 8 atoms of B to create 6 compound particles. This means that for each compound, there must be 1 atom of element A (6 atoms of A / 6 compounds = 1 atom of A per compound) and roughly 1.33 atoms of element B (8 atoms B / 6 compounds = 1.33), but as we cannot have a fraction of an atom, this suggests that not all atoms of element B are used in the creation of these compounds, perhaps leaving some atoms of element B left over.

For a chemically correct scenario, all participating atoms are usually used up in the formation of compounds unless specified otherwise, illustrating the principle of matter conservation in chemical reactions.

https://brainly.com/question/1600305

#SPJ12

Each particle contains 1 atom of element A and 1 atom of element B. All 6 atoms of element A and 8 atoms of element B are used to form the compounds.

In this compound, 6 atoms of element A combine with 8 atoms of element B to form 6 compound particles. To determine the number of atoms in each particle, we divide the total number of atoms by the total number of particles. In this case, each particle contains 1 atom of element A and 1 atom of element B.

Not all atoms are used to form compounds. In this scenario, all 6 atoms of element A and all 8 atoms of element B are used to form the 6 compound particles.

https://brainly.com/question/30426068

#SPJ12

The correct answer is option A. Three, dumbbell.

The p sublevel has __three_orbitals that are _dunmbbell_-shaped.

The three orbitals of the p sublevel are oriented in three directions along the x, y and Z axis. The orbitals are called px, py and pz. Each p orbital can have a maximum of 2 electrons. Since there are three p orbitals, the p sublevel can have a maximum of 6 electrons.

Answer : The correct option is, three, dumbbell.

Explanation :

As we know that there are many sub-levels which are s, p, d, f, g and so on. The sub-level are oriented in three directions along the x, y and z axis.

The 's' sub-level has one orbital that are spherically shaped.

The 'p' sub-level has three orbitals [tex](p_x,p_y,p_z)[/tex] that are dumbbell shaped.

The 'd' sub-level has five orbitals [tex](d_{xy},d_{xz},d_{yz}d_{z^2},d_{x^2-y^2})[/tex] that are double-dumbbell shaped.

The 'f' sub-level has seven orbitals [tex](f_{x(x^2-3y^2)},f_{y(x^2-3z^2)},f_{y(3x^2-3y^2)},f_{xz^2},f_{z^3},f_{yz^2},f_{xyz})[/tex] that are complex flower shaped.

Hence, the 'p' sub-level has three orbitals that are dumbbell shaped.

Answer is:  a bottle of acetic acid contains a solid.

Acetic or ethanoic acid (CH₃COOH) when undiluted is called glacial acetic acid.

Glacial acetic acid has freezing point (melting point) around 16.6°C, so it will be at solit state.

Vinegar is mixture of acetic acid (CH₃COOH) and water (H₂O). Vinegar  is colourless liquid with sour taste and pungent smell, freezing point of the vinegar is lower than glacial acetic acid.

Acetic acid dissociate in aqueous solution to form hydrogen ions (H⁺) and acetic anion (CH₃COO⁻).

Balanced chemical reaction (dissociation):  

CH₃COOH(aq) ⇄ CH₃COO⁻(aq) + H⁺(aq).

4. becomes softer as temperature rises

An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. Solids and liquids are both forms of condensed matter; both are composed of atoms in close proximity to each other.

An amorphous solid becomes softer as temperature rises, which is distinct from crystalline solids; they do not have a sharp melting point but gradually soften with increasing temperature. Option 4 is correct.

An amorphous solid is a type of solid that lacks a well-defined, long-range order or repeating pattern in its internal structure. Unlike crystalline solids, which have sharp melting points due to identical forces holding each atom or molecule in a precise arrangement, amorphous solids do not have a distinct melting point. Instead, they soften over a range of temperatures as heat is applied.

When an amorphous material such as glass or plastic is heated, the weakest intermolecular attractions break first, leading to a gradual softening of the material. As the temperature increases, stronger attractions also begin to break. This results in amorphous solids becoming softer with the rise in temperature, which is a characteristic distinct from crystalline solids.

Therefore, the correct answer to the question is that an amorphous solid becomes softer as temperature rises.

Whhhhaaaatttt????? A gold ball has more mass because it is a solid and we all  know that gold is sssuuuuuuuuppppppeeerr heavy...

So a tennis ball does not have more mass because it is not heavy... I don't know how to say it but it is a solid... but not heavier.

Hope this helps....

Final answer:

If 10 moles of H2O are produced in the given chemical reaction, CH4 + 2O2 → CO2 + 2H2O, then 5 moles of CO2 are also produced, based on the stoichiometry of the balanced equation.

Explanation:

The given chemical reaction is CH4 + 2O2 → CO2 + 2H2O. This reaction represents the combustion of methane (CH4) to produce carbon dioxide (CO2) and water (H2O).

According to the balanced equation, for every mole of CH4 that reacts, one mole of CO2 is produced and two moles of H2O are produced.

Hence, if 10 moles of water are produced in the reaction, that means that 10 moles of H2O are the result of 5 moles of CH4 completing the reaction since the ratio is 1:2. Therefore, 5 moles of CO2 are also produced, as the ratio of CH4 to CO2 is 1:1.

Answer: The lower temperature reduces molecule speeds, reducing the number of effective collisions.

Almost all food spoils. Most of the spoilage is because of the enzyme activity of microorganisms. Bacteria, which is an example of microorganism, grows rapidly at room temperature or higher temperatures mainly ranging between 40 degrees F to 140 degrees F.

The most commonly used strategy to minimize the rate of food spoilage is to keep it in a cool environment i.e. by refrigerating it. The lower temperature provided to the food slows down the movement of molecules and the number of collisions between them, thus slowing down the rate of enzyme activity.

Answer:

The lower temperature reduces molecule speeds, reducing the number of effective collisions.

Explanation:

It is a chemical change

Answer:

Chemical change

Explanation:

Combustibility is pretty much frying and egg and combustibility is a chemical change so :p

The mass of the new solution is 35.7 g.  

Step 1. Calculate the moles of CaCl₂ in the first solution.  

[[tex]\text{Moles of CaCl}_{2} = \text{0.015 00 L solution} \times \frac{\text{3.22 mol CaCl}_{2}}{\text{1 L solution }} = \text{0.048 30 mol CaCl}_{2}\\[/tex]  

Step 2. Calculate the mass of CaCl₂.  

[tex]\text{Mass of CaCl}_{2} = \text{0.048 30 mol CaCl}_{2} \times \frac{\text{110.98 g CaCl}_{2} }{\text{1 mol CaCl}_{2} } = \text{5.360 g CaCl}_{2} \\[/tex]  

Step 3. Calculate the mass of the new solution.

[tex]\text{Mass of solution }= \text{5.360 g CaCl}_{2} \times \frac{\text{100 g solution }}{\text{15.00 g CaCl}_{2} } = \textbf{35.7 g solution} \\[/tex]  

The pressure in a sealed container means the volume of container is fixed

so we cannot change the volume of container hence gas

The other factors which can affect the pressure are

a) moles of gas : if we increase the moles of gas the pressure of gas will increase

b) Temperature: if we increase the pressure of gas the pressure of gas will increase due to increase in kinetic energy

So the following cannot increase pressure

a) decrease in moles of gas

b) decrease in temperature of gas

Hey there! Your answer is C. Increasing the volume of the container

This is because the container is already sealed, so the volume is fixed.

The total number of digits that are counted while performing a measurement, are called significant figures or significant numbers. In a measured number, all the digits are certain except the last digit. The last digit which is uncertain in a measured number is called estimated digit. In the measurement 543.1267 inches, the last digit 7 is estimated digit. While taking into account the total number of significant figures, we count all the certain digits plus the estimated digit. Therefore, the number 543.1267 has 7 significant figures.

Final answer:

In the measurement 543.1267 inches, the estimated digit is 7 since it's the least significant digit in the sequence and is beyond the smallest marked unit of the measuring tool, thus it must be estimated.

Explanation:

In the measurement 543.1267 inches, the estimated digit is the 7. This is because in any measurement, the last digit that you report is always an estimated digit. The least significant digit is this estimated digit. To understand this concept, consider a ruler which may not have exact markings below a certain decimal place. In such cases, the smallest digit marked on the instrument is known for certain, while the next smallest digit—or the digit beyond the smallest marked unit—is considered to be an estimate.

For example, using a ruler with millimeter markings, if the length measured is between two marks, the measurer can be certain of the millimeters but would estimate the tenths of a millimeter. This principle helps to understand the accuracy of the measurement, which is critical for various scientific and technical applications. Thus, in the given measurement of 543.1267 inches, the digit 7 represents a level of precision that must have been estimated based on the granularity of the measuring tool.

Cyclopentane (C5H10)

The molar mass of CH2 is about 14.3, Since empirical is a ratio just divide the given molar mass by the molar mass of the empirical. 70.15/14.3=5 So now multiple everything by 5 in the empirical equation.

So, a compound that has an empirical formula of CH2 and a molar mass of 70.15 will have molecular formula of" C5H10".

650 KHz means 650 thousand hertz = 650,000 Hertz. If it were an FM station, say at 92.3 MHz, that would be 92.3 Million Hertz or 92,300,000 Hertz. MHz means mega hertz. Mega = Million.

The equivalency of the frequency of the radio wave in Hz is [tex]650 \times 10^3 \ Hz[/tex].

The frequency of a wave is number of cycles of the wave at a given period of time. The frequency of the wave is directly proportional to the speed of the wave and inversely proportional to the wavelength.

[tex]v = f \lambda[/tex]

where;

v is the speed of the wave

f is the frequency of the wave

λ is the wavelength

The given frequency of the wave = 650 kHz

The equivalency of the frequency of the radio wave in Hz  is calculated as follows;

[tex]f = 650 \times 10^3 \ Hz[/tex]

Learn more about frequency of wave here: https://brainly.com/question/19638389

Luster, the way light interacts with the surface of a material, is a physical property. It describes a characteristic of the material itself, unrelated to chemical reactions. An example is the high luster of diamond due to exceptional light reflection.

Luster refers to the way light interacts with the surface of a substance or material, such as a mineral. It is considered a physical property, not a chemical property, because it describes something about the material itself, and not how it reacts with other substances or changes its composition. For example, a diamond has a high luster due its excellent ability to reflect light, which is a quality inherent to the physical structure of the diamond and not related to any chemical reactions.

https://brainly.com/question/34015459

#SPJ6

Answer: Option (c) is the correct answer.

Explanation:

In a solid, molecules are held together by strong intermolecular forces of attraction. As a result, they are unable to move from their initial place but they can vibrate at their mean position.  

Hence, in solid substances the molecules have low kinetic energy. This means that there is very less space between the molecules of a solid substance.

Whereas in liquids, the molecules are held by less strong intermolecular forces of attraction as compared to solids. Due to which they are able to slide past each other. Hence, they have medium kinetic energy and some vacant space between each molecule.

In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move rapidly from one place to another leading to more number of collisions and wide spaces between each molecule.

Thus, we can conclude that when the students modeling as atoms stand or move in the taped-off section then they should all squeeze close together so that there is no vacant space.

Pretty sure it's the transfer of electrons.

Answer: Option (B) is the correct answer.

Explanation:

A chemical reaction in which there is transfer of electrons between any two species is known as a redox reaction.

For example, [tex]Cu(s) + 2Ag^{+}(aq) \rightarrow Cu^{2+} + 2Ag(s)[/tex]

Oxidation-half reaction: [tex]Cu(s) \rightarrow Cu^{2+} + 2e^{-}[/tex]

Reduction-half reaction: [tex]2Ag^{+}(aq) + 2e^{-} \rightarrow 2Ag(s)[/tex]

Thus, we can conclude that balancing a redox equation by the half-reaction method is based on action of transfer of electrons.

Answer:

m/v

Explanation:

m= mass

v= volume

mass divided by volume

Answer:

A. scientists have discovered new planets orbiting a star by detecting a wobble in the star's motions.

Explanation:

As can be seen from the options only first option shows an observation. Here the scientists observed the wobbling of the stars and through that they deduced that there will be planets orbiting around that star. This deductions stands true as the gravity of the planet affects the motion of the star as well. Other options do not show such instances.

Answer:

The spoon inside the soup bowl heats up due to heat conduction.

Conduction is one of the types of thermal transfer that allows heat to be transmitted from a hot object to a cold one. (from soup bowl to spoon)

In conduction there is no matter transport. What is transferred is heat, which is a form of energy, corresponding to the increase in the kinetic energy of the atom.

Thermal conduction involves the propagation of heat by contact.