what does alternate form mean

Answer:0.477 g/ml

Explanation:

Density=(40.14-33.79)/13.3 ml

Density=6.35/13.3

Density=0.477 g/ml

Answer:

1. Gold is valuable because of its high quality physical and chemical properties

2. The gold mines where the state's property in both Egyptian and Roman civilizations

3. The elixir of life is akin to the philosopher stone. It is a chemical portion that when drank, grants eternal life

4. The contribution of alchemists to modern chemistry, includes the formulation of the first ideological periodic table, the distillation process, metalworking, gunpowder, glass, ink, paints, cosmetics and many other innovations

Explanation:

Answer:

Observe how the force of gravity is directly proportional to the product of the two masses and inversely proportional to the square of the distance of separation.

Explanation:

I think im not sure

there is no group 17

Answer:

People show more interest in personal broadcasting.

Explanation:

The art of oration (speaking) is being  replaced by personal broadcasting mean now people used webcam or camcorder for creating its own content and transmit it to other people through internet. Personal broadcasting provides audio and video to the individual that make it more interesting as compared to oration. People show more interest in personal broadcasting as compared to oration so that's why oration is replaced by personal broadcasting.

Answer:

B

Explanation:

the formula is d=m/v

both sides xV

dv=m

The equation describes the mass of an object in relation to its volume and density is m=D×V. option B is correct.

The density of a substance is the mass of per unit volume of a substance or any object and the density will be equal to the division of mass of the substance to the volume of the substance and its SI unit will be cubic centimeter.

The equation of mass can be calculated by the help of the formula of density too. so, the mass will be the multiplication of the density of a substance and the volume of the substance and the unit will be kilogram.

Therefore, equation describes the mass of an object in relation to its volume and density is m=D×V. option B is correct.

Learn more about density, here:

https://brainly.com/question/16894337

#SPJ2

Answer:

True

Explanation:

They do retain their individual properties.

Answer:

Answer is (a)

Explanation:

Answer:

Qualitative

Explanation:

Recording a change in the color of a substance is an example of collecting qualitative data.

Data generally refer to information collected or recorded through observations. There are different types of data:

Hence, recording a change in the color of a substance can be classified as collecting qualitative data.

Answer:

Developing the problem

Explanation:

In order to have an experiment or to make the experiment's data useful, you must first find a problem to solve.

Answer:

64567000000 nanolitres

Explanation:

Base 10 decimal system: 1 milli = 1000000 nano

We simply multiply 64,567 millilitres by 1000000 to get our number in nanolitres:

64567(1000000) = 64567000000 nanolitres

Answer:

the membrane forms an outer boundary of the cell and, as such, holds the cell together. The membrane is also pliable, which means it can move and flex in response to the surrounding environment. The fluid nature of the membrane is important because it allows the cell to survive in various environments.

Explanation:

understand yourself!

Answer:

Chemistry course is intended for students who did not take chemistry in high school or who struggled with high school chemistry.

Explanation:

Answer:

The correct answer is 582.8.

Explanation:

To solve this problem, we must remember the rules for significant figures for addition.  Recall that the answer should have the same number of decimal places as the term with the least number of decimal places that we are adding.  In this case, we can see that out of our three terms, 98.3 has the least number of decimal places.  This lets us know that our answer should be rounded to the tenths place.

With this in mind, we can compute the addition.

246.24 + 238.278 + 98.3

= 582.818 (unrounded value)

However, we stated that our answer should be rounded to the tenths place.

Therefore, our answer is 582.8.

Hope this helps!

Answer:

ozone. CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules.

Answer:

C: Oxygen  

Explanation:

When they are exposed to strong ultraviolet light, CFCs finally break down to release lone chlorine atoms with an unpaired electron. These chlorine atoms are highly unstable and react with ozone to break it down into oxygen through a type of chain reaction.

Answer:

Explanation:

▪️[tex] \underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}[/tex]

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️[tex] \underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}[/tex]

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️[tex] \underline{ \bold{ \sf{ \purple{For \: example}}}}[/tex]

When nitrogen reacts with hydrogen to form ammonia :

Nitrogen + Hydrogen ⇒ Ammonia

N₂ + 3H₂ ⇒ 2NH₃

Presentation of a chemical reaction in the form of equation is called chemical equation . Chemical equation may be word equations or formula equations.

Hope I helped!

Best regards!!

Answer:

Kilograms

Explanation:

The metric system denotes their measurements with prefixes (kilo)

Answer:

0.947 mol LiOH

Explanation:

2 LiOH  +  CO₂  ⇒  Li₂CO₃  +  H₂O

Convert grams of Li₂CO₃ to moles.  The molar mass is 73.891 g/mol.

(35.0 g Li₂CO₃)/(73.891 g/mol Li₂CO₃) = 0.4737 mol Li₂CO₃

Use the mole ratio between LiOH and Li₂CO₃ to covert moles of Li₂CO₃ to moles of LiOH.

0.4737 mol Li₂CO₃ × (2 mol LiOH/1 mol Li₂CO₃) = 0.9474 mol LiOH

Round for proper significant figures.

0.9474 ≈ 0.947 mol LiOH

that gas is called hydrogen gas

Answer and explanation:

A museum curator is most likely an art conservationist. They would have to determine the age an art piece was developed and ways to preserve older artefacts.

These processes would require the use of chemicals and physical tests, and also research laboratories.

I hope this answer is helpful and clear.

Answer:

Vapor pressure of the solution is 22.9 torr at 25°C

Explanation:

When a non volatile solute is added to a pure solvent, the vapour pressure of the mixture decrease regard to the pure solvent following the equation (Raoult's law):

[tex]P_{solution}=X_{solvent}.P^0_{solvent}[/tex]

Where vapour pressure of the pure solvent (Water) is 23.8torr at 25°C.

Mole fraction of water is the ratio between moles of water and total moles in solution. The solution has a mole fraction of water of:

[tex]X_{water}=\frac{8.0Moles_{water}}{0.30mol_{Na_2SO_4}+8.0mol_{water}} = 0.9639[/tex]

Replacing in Raoult's law:

[tex]P_{solution}=0.9639*23.8torr[/tex]

Answer:

0.96 mole of CH4.

Explanation:

From a background knowledge of gas laws, we understood that 1 mole of a gas occupy 22.4 L at STP. This implies that 1 mole of CH4 also occupy 22.4 L at STP.

Now, we shall determine the number of mole of CH4 that will occupy 21.5 L at STP. This is illustrated below:

1 mole of CH4 occupied 22.4 L at STP.

Therefore, Xmol of CH4 will occupy 21.5 L at STP. i.e

Xmol of CH4 = (1 × 21.5)/22.4

Xmol of CH4 = 0.96 mole

Therefore, 0.96 mole of CH4 will occupy 21.5 L at STP.

Answer:

Covalent bonds are intermediate in strength and weaker than ionic bonds

Explanation:

Because ionic bonds tend to form a rigid lattice structure that make them more stronger and difficult to remove electrons from them

Answer:

Hey there!

The volume rose by 5 ml, and that means the stone has a volume of 5 ml. Thus, the stone has a density of 25/5, or 5 g/cm^3.

Let  me know if this helps :)

Answer:

physical: color, appearance chemical: reactivity, flammability

please mark my answer brainliest...

condition...pressure remains constant.

1. The temperature at which the volume of gas has been 960 ml is [tex]\rm \bold{19.99\;^\circ C}[/tex].

2. The temperature at which the volume of gas has been [tex]\rm 300\;cm^3[/tex] is [tex]\rm \bold{90^\circ C}[/tex].

1. The gas has been assumed to be an ideal gas. For an ideal gas, the relationship between temperature and volume at constant pressure has been given as:

[tex]\dfrac{V1}{T1}=\dfrac{V2}{T2}[/tex]

Where, the initial volume, [tex]V1=720\;\text {ml}[/tex]

The final volume, [tex]V2=960\;\text {ml}[/tex]

The initial temperature, [tex]T1=15\;^\circ \text C[/tex]

Substituting the values, the final temperature, T2 can be given as:

[tex]\rm \dfrac{720\;ml}{15\;^\circ C}=\dfrac{960\;ml}{\textit{T}2} \\\textit T2=\dfrac{15\;^\circ C}{720\;ml}\;\times\;960\;ml\\\textit T2=19.99\;^\circ C[/tex]

The temperature at which the volume of gas has been 960 ml is [tex]\rm \bold{19.99\;^\circ C}[/tex].

2. The temperature for gas to occupy [tex]\rm 300\;cm^3[/tex] has been given as:

Where, the initial volume, [tex]V1=900\;\rm{cm^3}[/tex]

The final volume, [tex]V2=300\;\rm {cm^3}[/tex]

The initial temperature, [tex]T1=270\;^\circ \text C[/tex]

Substituting the values, the final temperature, T2 can be given as:

[tex]\rm \dfrac{900\;cm^3}{270\;^\circ C}=\dfrac{300\;cm^3}{\textit{T}2} \\\textit T2=\dfrac{270\;^\circ C}{900\;cm^3}\;\times\;300\;cm^3\\\textit T2=90\;^\circ C[/tex]

The temperature at which the volume of gas has been [tex]\rm 300\;cm^3[/tex] is [tex]\rm \bold{90^\circ C}[/tex].

For more information about the volume of gas, refer to the link:

https://brainly.com/question/1218415

Answer:

dimensional analysis is the way of converting different units. when you add two physical quantities or equate them they must be in same units.

uses:

to check the correctness of a physical formula

to convert the value from the one system to another.

to form a relationship between different physical quantities

Answer:

This question is incomplete; the remaining part of the question asks to

State the problem, the hypothesis, independent variable, dependent variable, control group, constants, conclusion and if the data is qualitative or quantitative

Please find the answer to each of the above mentioned below

Explanation:

1. The problem of this experiment conducted by the pharmaceutical company is to test whether a newly developed drug will lessening common cold effects in people.

2. The hypothesis is testable explanation given to solve a problem. In this experiment, the hypothesis will be: IF the volunteers took the newly produced drug, THEN the severity of the cold will be reduced.

3. Independent variable is the variable that is manipulated or changed in an experiment. The independent variable in this experiment is DRUG because it is what is changed by the pharmaceutical company.

4. The dependent variable is the variable that is measured or tested in an experiment. It is what responds to change in the independent variable. In this experiment, the dependent variable is the EFFECT OF THE COMMON COLD/NUMBER OF TISSUES USED

5. The control group in an experiment is the group that is not administered the experimental treatment. In this case, the twenty-five people that were given a placebo, a sugar pill is the CONTROL GROUP.

6. Constants or Control variables are the variables that the experimenter keeps constant or unchanged throughout the experiment. In this case, the constants are the same environment, the same climate, eating the same diet, and the same level of activity.

7. The CONCLUSION of this experiment is that the sugar pill used the same amount of tissues as those who had taken the new wonder drug. This means that both the drug and sugar pill have the same level of effectiveness. Hence, the hypothesis is DISPROVED because the drug had no improved effect on the people.

8. A quantitative data is one which involves the use of values and numbers. In this experiment, the effectiveness of the pill was determined by the number of tissues used, hence, the data is QUANTITATIVE.