some students were investigating the speed of a toy car. they perform two trials and recorded their data in the table below

what was the average speed of the toy car during the two trials to the nearest tenth of a m/s? be sure to use correct place values.

25.4
1.6
3.0
6.4​

Answer:

10 moles of potassium Chlorate are required to produce 15 mole of oxygen

Explanation:

The balanced chemical equation is

2KClO3(s)→2KCl(s)+3O2(g)

2 moles of potassium Chlorate produce 3 moles of oxygen

Number of moles of potassium Chlorate required to produce 1 mole of oxygen [tex]= \frac{2}{3}[/tex]

Number of moles of potassium Chlorate required to produce 15 mole of oxygen

[tex]= \frac{2}{3} * 15\\= 10[/tex]

10 moles of potassium Chlorate are required to produce 15 mole of oxygen

Answer:

After discovering the electron in 1897, J J Thomson proposed that the atom looked like a plum pudding . To explain the two types of static electricity, he suggested that the atom consisted of positive 'dough' with a lot of negative electrons stuck in it.

Answer:

amphibians

Explanation:

please mark this answer as brainliest

Answer:

So a sodium atom has the electronic configuration 2,8,1 meaning it has 1 electron on its outer shell. It has a neutral charge since the number of electrons is equal to the number of protons.

A sodium ion is one that has lost the electron on its valence shell. The electronic configuration is 2,8 and it has a positive charge because it has more protons than electrons.

Answer:

[tex]\boxed {\boxed {\sf Number \ of \ electrons \ and \ net \ charge}}[/tex]

Explanation:

Remember that protons have a positive charge of +1 and electrons have a negative charge of -1. Atoms have protons and electrons.

A sodium atom has the electron configuration of 2-8-1. It has 11 electrons and its atomic number (number of protons) is also 11. This means it is a neutral atom because the charges of the electrons (-11) and protons (+11) balance each other out.

However, a sodium ion is different. It loses the 1 valence electron, so it only has 10 electrons. It still has the same atomic number of 11.

It is a not a neutral atom because the charges of the electrons (-10) and protons (+11) do not balance out. It has more protons and a net positive charge of +1. It is a cation or a positively charged ion.

Answer:

A. Is the Internal energy of matter

Hope this helps!

Answer: 4.1 Acidic

Explanation:

pH = -log(H+)

     = -log (7.94x10^-5)

     = 4.10017949757

     = 4.1

any pH under 7 is acidic

1. stored energy

2. by wind

3. sound energy

4. petals

5. 1 parent

hope this helped <3

Answer:

Coefficients

Answer:

5.2 multiple by 32.5

Ur answer divide by 15.9

169 divided by 15.9

ANSWER is 10.6

Answer:

mncL2 is the water molecule

Answer:

Answer:

A,C

Explanation:

Answer:

those have symbols for their Latin or Greek name

Explanation:

hope it helps

Answer:

Na number of 11

Explanation:

Pb no. 82

Au no. 79

Cu no. 29

Hg no. 80

Answer:

Explanation:

i cant understand the complete question, can you reword it and ill answer

Answer:

Kw = 1×10⁻¹⁴

Explanation:

The product between the [H₃O⁺] .  [OH⁻] talks about the

autoionization of water.

2H₂O  ⇄  H₃O⁺  .  OH⁻     Kw

This is an equilibrium of 2 molecules of water that produces 1 mol of hydronium and 1 mol of hydroxides.

In order to determine pH and pOH, parameters to indicate acidic or basic solutions we know:

- log [H₃O⁺] = pH

- log [OH⁻] = pOH

When [H₃O⁺] or [OH⁻] = 1×10⁻⁷ , pH or pOH = 7 (Neutral solutions)

So if we see the equation above, we have an equilibrium.

In order to determine Kw, we need [H₃O⁺] .  [OH⁻]

As [H₃O⁺] and [OH⁻] = 1×10⁻⁷ , Kw = 1×10⁻¹⁴

The product of [H₃O⁺] and [OH⁻] is 1 × 10⁻¹⁴. The correct option is the first option - 1 x 10-14

The ionization constant of water, Kw, is the product of  [H₃O⁺] and [OH⁻]

That is,

Kw = [H₃O⁺][OH⁻]

In pure water, [H₃O⁺] = [OH⁻] = 1 × 10⁻⁷

∴ Kw = [H₃O⁺][OH⁻] =  1 × 10⁻⁷ ×  1 × 10⁻⁷

Kw = [H₃O⁺][OH⁻] =  1 × 10⁻¹⁴

Hence, the product of [H₃O⁺] and [OH⁻] is 1 × 10⁻¹⁴. The correct option is the first option - 1 x 10-14

Learn more here: https://brainly.com/question/14054598

Answer: it is the 4th option in there

Explanation:

Answer:

It platypus

Explanation:

The Platypus lays eggs

Answer:

2Co + 3F2 --> 2CoF3

Explanation:

When balancing an equation we need to ensure that the products used equal the reactants produced. Hence to balance the equation we need 3 F2 molecules so we have 6F atoms in total. and since 1 Co molecule bonds to 3 F molecules. We are gonna need to 2 Co molecules.

The accurate description of a geocentric solar system is the earth as a reference point.

The solar system refers to the arrangement of the sun and the planets. The description of the solar system in which the earth constitutes the center or reference point is called the geocentric model.

An alternative and more accurate model devised by Copernicus is the heliocentric model in which the sun lies at the center of the solar system.

Learn more: https://brainly.com/question/957540

Answer:

Climate

Explanation:

Answer:

True

Explanation:

Answer:

[tex]c=0.309\ J/g^{\circ} C[/tex]

Explanation:

The increase in heat, Q = 58.1 J

Mass, m = 89.4 g

The temperature increases from 23.4°C to 25.5°C. We need to find the specific heat of an unknown metal.

We know that the increase in heat is given by :

[tex]Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{58.1}{89.4\times (25.5-23.4)}\\\\c=0.309\ J/g^{\circ} C[/tex]

So, the specific heat of an unknown metal is equal to [tex]0.309\ J/g^{\circ} C[/tex].

Answer:

263

Explanation:

Mammals will shed much of their fur or hair to help them cool off and maintain  their body temperature.

Answer:

the answer is B

Explanation:

Answer:

ig activated complex coz reactants were diaatomic molecules and they were stable initially later on we collided them so they broke into activated complex and they were highly unstable so that they bonded again with another ion!!!! so according to me B is correct OPTION!!

The name of the unstable molecule formed during the collision of A2 and B2 from the image above is called the activated complex

Option B

The activated complex of molecular substance in a chemical reaction is refers to that state of particles that is in between the reactants and products.

In general, an activated complex is an unstable arrangement of molecules during reaction of substances

A molecule can be defined as the smallest particle of a substance which can normally exist alone and still retain the properties of the substance

Learn more about molecules:

https://brainly.com/question/24411600

Answer:

answer:-

a long-term increase in the Earth's average temperature

Answer:

Solution➔

a long term change in the Earth's climate

hope it is helpful to you

Answer:

50mL

Explanation:

Using Boyle's law equation as follows:

P1V1 = P2V2

Where;

P1 = initial pressure (torr.)

P2 = final pressure (torr.)

V1 = initial volume (mL)

V2 = final volume (mL)

According to the information provided in the question,

V1 = 25.0mL

V2 = ?

P1 = 760 torr.

P2 = 380 torr.

Using P1V1 = P2V2

V2 = P1V1//P2

V2 = (760 × 25) ÷ 380

V2 = 19000 ÷ 380

V2 = 50mL

Answer:

[tex]6.8 molH_2O[/tex]

Explanation:

Hello there!

In this case, for this balanced chemical reaction about the combustion of methane, it is possible for us to inspect the 2:2 mole ratio of water to oxygen as given for their coefficients in the balanced chemical reaction.

In such a wat, given 6.8 moles of oxygen, we can easily obtain the produced moles of water by applying the aforementioned mole ratio as shown below:

[tex]6.8molO_2*\frac{2molH_2O}{2molO_2}\\\\6.8 molH_2O[/tex]

Best regards!