What is a physical property of water?
A) liquid at room temperature
B) not flammable
C) pH of 7
D) reacts with sodium

The correct answer is option D, 0.009M

Concentration is defined as the amount of solute in a solution.

Noting the following points about concentration is helpful;

A high numerical value of concentration indicates that there is a higher amount of solute in the solution while a lower value of concentration indicates that there is a lesser amount of solute in the solution.

Hence, a solution with lesser concentration is said to be dilute. If the solution has a concentration of 0.009M, then it is a dilute solution.

https://brainly.com/question/1416865

1. Scientist named the new pigment YInMn because it contains yttrium, indium and manganese elements. The symbol for yttrium is Y, indium is In and that for manganese is Mn thus, to reflect the chemical composition of pigment it is named YInMn.

2. The pigment that is used in coloring materials like paint and plastics was discovered accidently by scientists in an experiment due to mixing and heating of chemicals while manufacturing electronics. An intense blue colored compound results due to chemical combination of two or more elements.

3. No, pigments with same color do not have all the same properties. YInMn blue and cobalt blue, both are same in color, but they have different manufacturing process and YInMn is more durable than cobalt because it gets fade over time.

4. The two characteristics of YInMn are good pigment and use of nontoxic ingredients in manufacturing. It is difficult to find the blue pigments in nature, it is also difficult to manufacture them therefore, the mentioned characteristics are important.

Final answer:

Niobium has five unpaired electrons, with one electron from the 5s orbital and four electrons from the 4d orbitals, following Hund's rule.

Explanation:

The student asked about the number of unpaired electrons in niobium. Niobium (Nb) has the atomic number 41, which means its electron configuration is [Kr]4d45s1. In the niobium atom, there are five electrons in its outermost d and s orbitals, out of which one can be found in the 5s orbital and four in the 4d orbitals. According to Hund's rule, which states that every orbital in a subshell is singly occupied before any orbital is doubly occupied and all electrons in singly occupied orbitals have the same spin, we can expect at least one unpaired electron in niobium due to its electron configuration.

To determine the exact number of unpaired electrons, we need to look more closely: the single electron in the 5s orbital is unpaired, and within the 4d subshell, which can hold up to 10 electrons, there are four electrons. These will occupy the first four orbitals singly before pairing up, resulting in four unpaired electrons from the 4d subshell. Therefore, niobium has a total of five unpaired electrons, one from the 5s orbital and four from the 4d orbitals.

Answer:

- Hardness

Hardness is a mineral’s ability to resist being scratched. Minerals that are not easily scratched are hard. You test the hardness of a mineral by scratching its surface with a mineral of a known hardness. Mineralogists use the Mohs Hardness Scale, shown in Table below, as a reference for mineral hardness. The scale lists common minerals in order of their relative hardness. You can use the minerals in the scale to test the hardness of an unknown mineral.

Mohs Hardness Scale

As you can see, diamond is a 10 on the Mohs Hardness Scale. Diamond is the hardest mineral; no other mineral can scratch a diamond. Quartz is a 7. It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale. Fluorite is one. Suppose you had a piece of pure gold. You find that calcite scratches the gold. Gypsum does not. Gypsum has a hardness of 2 and calcite is a 3. That means the hardness of gold is between gypsum and calcite. So the hardness of gold is about 2.5 on the scale. A hardness of 2.5 means that gold is a relatively soft mineral. It is only about as hard as your fingernail.

Mohs Scale

Hardness Mineral

1 Talc

2 Gypsum

3 Calcite

4 Fluorite

5 Apatite

6 Orthoclase feldspar

7 Quartz

8 Topaz

9 Corundum

10 Diamond

sorry im so late -_-ll

The ball stops moving because of friction force. Friction is the force that opposes all motion. Therefore, the answer is friction force...

Answer:

friction

Explanation:

took test

Factors that determine sound intensity are amplitude and the distance.

Amplitude 
Amplitude depends on the starting energy of the sound wave. If the amplitude is high then the intensity will be high.

Distance
Distance is the measure of how far does the sound wave travel from its source. If the distance is high then the intensity will be low.

Using the balanced chemical equation 2C + Cu2O → 2CO + 2Cu, it can be determined that 1.98 moles of carbon will produce 1.98 moles of carbon monoxide (CO) when reacting with an excess of copper(I) oxide.

The subject of this question is Chemistry, specifically dealing with stoichiometry which involves the calculation of the amounts of reactants and products in chemical reactions. Given that 1.98 moles of carbon (C) react with an excess of copper(I) oxide (Cu2O), we need to know the balanced chemical equation to find the amount of carbon monoxide (CO) produced.

The chemical equation for the reaction between carbon and copper(I) oxide to produce carbon monoxide and copper would be:

2C + Cu2O → 2CO + 2Cu

From this balanced equation, we can see that 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we start with 1.98 moles of carbon, we will also produce 1.98 moles of CO, since the ratio of carbon to carbon monoxide is 1:1.

When 1.98 moles of C are reacted with an excess of Cu2O, it would produce 1.98 moles of CO assuming the reaction follows the stoichiometry of 2 moles of C producing 2 moles of CO.

If 1.98 moles of C are reacted with an excess of Cu2O, the number of moles of CO produced can be determined by using stoichiometry and the balanced chemical equation for the reaction. Unfortunately, the actual balanced chemical equation is not provided in the question. However, a typical reaction between carbon and copper (I) oxide might look like this:

2C(s) + Cu2O(s) → 2CO(g) + Cu(s)

According to this balanced equation, 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we have 1.98 moles of carbon, it would produce 1.98 moles of CO, assuming carbon is the limiting reactant and since there's an excess of Cu2O.

You have this in Chemistry. It should be in physics, but never mind that.

A

d = 4 km due east. See note for part B.

t =  45 minutes = 3/4 hour

v = ??

d = v * t

4 = v * (3/4)

v = 4/(3/4) = 4 * 4/3 = 16/3 = 5 1/3

So his rate of travel is 5 1/3 km/hr due east. If you do not give the direction when it says velocity, you are wrong. Velocity has direction.

B

10 45 to 11 45 is 1 hour.

d = v * t

d = 6 km due south (this is actually a displacement which also has direction). 

t = 1 hour

6 = v * (1)

6/(1) = v

6/(1) = v

v = 1 km/ hr due south 

Considering the definition of the Law of Conservation of Matter, the correct answer is option D. Atoms of each element are conserved, so the total mass does not change.

The Law of Conservation of Matter is also called the law of conservation of mass or the Law of Lomonósov-Lavoisier. This law postulates that "the mass is not created or destroyed, only transformed."  

This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends.  

In other words, then the mass before the chemical reaction is equal to the mass after the reaction. The exception to the rule is nuclear reactions, in which it is possible to convert mass into energy and vice versa.

Taking into account the above, the correct answer is option D. Atoms of each element are conserved, so the total mass does not change.

Learn more:

Answer: Option (A) is the correct answer.

Explanation:

When we place two objects of different temperature adjacent to each other then there will occur transfer of heat from hotter object to colder object till their temperature becomes equal.  

This process is known as conduction.

For example, a metal spoon placed in hot coffee cup then heat will flow from coffee to the cup.

Convection is defined as the process in which a fluid (liquid or gas) when heated then more dense (cooler) substance sinks ate the bottom whereas less dense (hotter) substance will rises at the top.  

This intermixing of the substances tends to generate convection currents and this process is known as convection.

Radiation is defined as an electromagnetic energy which travels in space in the form of waves or particles.

This means that heat energy will always travel from a warmer object to a colder object.

Thus, we can conclude that heat ALWAYS flows from warmer objects to cooler objects, is a true statement about heat transfer through conduction, convection, or radiation.

The statement 'heat ALWAYS flows from warmer objects to cooler objects' is TRUE about heat transfer through conduction, convection, or radiation (Option A).

In conclusion, the statement 'heat ALWAYS flows from warmer objects to cooler objects' is TRUE about heat transfer through conduction, convection, or radiation (Option A).

Learn more about heat transfer here:

https://brainly.com/question/12107378

Calcium and lithium are oxidized and Florine and oxygen are reduced.

Oxidizing agent are defined as a substance or component that participates in an oxidation-reduction reaction and receives electrons from a separate species. The oxidizing agent, often referred to as the electron acceptor, is typically in one of its higher oxidation states since it will receive electrons and be reduced.

Reducing agent are defined as a reactant in an oxidation-reduction reaction that decreases another reactant by discharging electrons to that reactant. Reducing one's consumption of energy-dense foods and canceling undesired magazine subscriptions are two examples. Another example of reduction is to turn off the water when brushing your teeth rather than letting it run the full two minutes.

Thus, calcium and lithium are oxidized and Florine and oxygen are reduced.

To learn more about oxidizing agent, refer to the link below:

https://brainly.com/question/10547418

#SPJ2

Answer:gold

Explanation:

Answer:

remains constant

yeah weight is the answer

Answer:

Fragmentation

Explanation:

APEX