Look at the picture. Assume that all of these substances are in different containers. In all of
these substances, atoms have combined to form
ions
elements
molecules
mixtures

Answer:

Explanation:

1122 g CaO.

I hope I helped you! :)

The mass of oxygen needed to react 10 grams of calcium to form calcium oxide is 4.0 grams.

Given:

The reaction:

[tex]2Ca+O_2\rightarrow CaO[/tex]

Mass of calcium = 10 g

To find:

The mass of oxygen needed to react 10 grams of calcium to form calcium oxide.

Solution:

[tex]2Ca+O_2\rightarrow CaO[/tex]

Mass of calcium = 10 g

Moles of calcium = [tex]\frac{10 g}{40.078 g/mol}=0.25 mol[/tex]

According to reaction, 2 moles of calcium reacts with oxygen, then 0.25 moles of calcium will react with:

[tex]=\frac{1}{2}\times 0.25 mol=0.125 \text{ mol of }O_2[/tex]

Mass of 0.125 moles of oxygen gas:

[tex]0.125 mol\times 31.998 g/mol=3.99975 g\approx 4.0 g[/tex]

The mass of oxygen needed to react 10 grams of calcium to form calcium oxide is 4.0 grams.

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Answer:

The ratio of an object's mass to its volume is called density of an object

Explanation:

Density=mass/volume

Answer:

B) The average speed of the car increases as distance traveled increases.

Explanation:

The unbalanced forces acting on the toy car affect its average speed, The average speed of the car increases as distance traveled increases. Therefore, option A is correct.

The term average speed is defined as the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is corresponded to the magnitude and does not have direction.

Average speed is calculated by dividing the total distance something travels by the total amount of time it spends traveling.

Average speed = Total distance covered / Total Time. The S.I. unit of speed is meter per second.

The unbalanced forces acting on the toy car impact its average speed, The average speed of the car increases as distance traveled increases.

Thus, option A is correct.

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Your question is incomplete, most probably your question was

And experiment a student measures the speed of a toy car locations K through N as it rolls down a ramp based on the data collected in the table exclusion was shown by the student that the unbalanced forces acting on the toy car affect its average speed what reasoning lead to the interpretation of this data and conclusion

A.The average speed of the car increases as distance traveled increases.

B.The average speed of the car decrease as distance traveled increases.

C.The average speed of the car decreases as distance traveled decreases.

D. The average speed of the car increases as distance traveled decreases.

Answer:

The substance has a density of 2.636 grams per mililiter.

Explanation:

We must remember that density ([tex]\rho[/tex]), measured in grams per mililiters, is the mass of the substance ([tex]m[/tex]), measured in grams, divided by its volume ([tex]V[/tex]), measured in mililiters. That is:

[tex]\rho = \frac{m}{V}[/tex]

In addition, a kilogram equals 1000 grams and a liter equals 1000 mililiters. If we know that [tex]m = 1713.2\,g[/tex] and [tex]V = 650\,mL[/tex], then:

[tex]\rho = \frac{1713.2\,g}{650\,mL}[/tex]

[tex]\rho = 2.636\,\frac{g}{mL}[/tex]

The substance has a density of 2.636 grams per mililiter.

Answer:

The correct answer is D

Explanation:

I took the test and got i correct. :) have a good day!

Answer:

30 days

Explanation:

43200÷1440 ( minutes in a day)

the anwer will came after cutting out is 30 which means 30 days

plz mark me brainleast

Answer:

No

Explanation:

Acceleration refers to the increase in speed over time. Since both of the objects are moving at a constant speed (so the speed is not changing) neither are accelerating, because acceleration requires a positive change in speed.

They may be moving at different speeds, one faster than the other, but neither are changing their own speed so neither are accelerating.

Hope this helped!

Answer:

i think its oxidation

Explanation:

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question

mass of lead = 200 g

density = 11.342 g/cm³

It's volume is

[tex]volume = \frac{200}{11.342} \\ = 17.6335743...[/tex]

We have the final answer as

Hope this helps you

Answer:

Coyotes, Bald Eagles, & Gray wolf.

Answer:

The liquid state of matter is an intermediate phase between solid and gas. ... Liquids will flow and fill the lowest portion of a container, taking on the shape of the container but not changing in volume. The limited amount of space between particles means that liquids have only very limited compressibility

Explanation:

A liquid is a nearly incompressible fluid with a nearly constant volume regardless of pressure that adapts to the shape of its container. It belongs to one of the four basic states of matter.

Volume retention and conformity to the shape of a liquid's container are two of its most noticeable physical characteristics. When a liquid substance is poured into a container, it conforms to the shape of the container and will stay inside the container so long as the liquid state persists.

The intermolecular forces of attraction in a liquid state of matter are stronger than those in a gaseous state but weaker than those in a solid state.

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Answer:

Answer:

an apple is best described as a heterogeneous mixture.

The phrase that best describes an apple is heterogenous mixture because it is made up of a different materials.

A mixture is combination of different components that can be uniform or dispersed and homogenous or heterogenous.  A homogenous mixture is the one in which the two or more components are dissolved together to form only one phase.

A heterogenous mixture is composed different phases with uniform or irregular arrangement of materials. Heterogenous mixtures look like a nonseparated random particles which are clearly distinguishable by eyes.

Apple is not a compound but is a mixture made up of different components such as water, pulp, seeds, pigments etc. and each forms their own phases.

Hence, Apple can be termed as a heterogenous mixture.

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Answer:

measure in cups or fluid ounces

Explanation:

Answer:

Liters

Explanation:

Trust me

A. kilogram is the SI unit used to measure mass of body.

B. litre is the SI unit used to measure volume of substance.

C. meter is the unit used to measure length of body.

D. Kelvin is the unit used to measure temperature of body.

Hence, (B) is the correct answer!

Cheers!

Answer:

2491344 seconds

Explanation:

By the way Google has a conversion system just in case you want to use it. Just google time conversion. It also does other types of conversion like Volume and Weight.

Answer:

D.  

They have a positive charge and are present in the nucleus of an atom along with the neutrons.

explanation:

Protons have a positive charge.

Answer:

No.

Explanation:

No, convection does not occur if Earth's mantle were a box 30 km on a side because convection needs medium for the movement of heat energy from one place to another. Convection and conduction are two processes which needs medium for its movement while radiation does not need any medium for its movement. If there is a empty space present between two substances so convection does not occur.

Answer:

A.

Explanation

Because it is totally irrelevant to what the question is asking.

Answer:

Aluminum is an element

Explanation:

Aluminum is the most abundant metal in the earths crust with an atomic number of 13.

Answer:

I believe the answer is A

Explanation:

Explanation:

density = mass/volume so volume = mass/density = 40/4.30

Answer:

Neil's Bohr improved Rutherford's model.

Explanation:  I hope this helps! :)

Answer:

A

Explanation:

Answer:

A. the valence electrons

Explanation:

Answer:

856.00

Explanation:

just move the decimal two places to the right :)

Answer:

Charles' Law

Explanation:

If a sealed container of gas were placed in a fire, the temperature and pressure of the gas would increase until the container broke or exploded. ... to volume when temperature is constant.

In the case when the bottle should be thrown into the fire so here Charles' Law should be applied.

Charles's law is a statement where the volume should be occupied by a fixed amount of gas that should be directly proportional to its absolute temperature in the case when the pressure remains constant.

Since in the case when the sealed container of gas should be placed in the fire so here the temperature and the pressure should be increased till the break of the container.

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Answer: CO2 is a type of compound because it consists of multiple elements such as oxygen and carbon.

Answer:

Carbon dioxide is a compound because it contain more than one type of elements, carbon and oxygen, which are chemically bonded.

Answer:

Jurassic period

Hope this helps!