This is a science question. What is the acceleration of the dragster?

Answer:

A)  0.0499

Explanation:

According to the mole concept, 2.80 g of calcium oxide sample  has 0.0499 moles.

According to the mole concept,mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

As per the formula for number of moles, which is mass/molar mass

number of moles of calcium oxide is:2.80/56.08=0.0499 moles.

Hence, 2.80 g sample of calcium oxide has 0.0499 moles.

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Answer:

evaporation

Explanation:

the answer evaporation because when it hits the highest point it evaporation ig?? lol

Answer:

type D

balance form .b

Explanation:

Answer:

yes they carry charges

Answer:

wood

Explanation:

hope this helps! good luck on ur test :)

Answer:

Wood

Explanation:

Answer:

Explanation:

Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.

The same object moves quicker through the bare floor than carpet as there has been no friction force acting on the object on the bare floor.

The friction force has been the force that has been applied against the motion of the object. The friction force has been created with the uneven surfaces that result in the slowing of the motion of the object.

The object has been slid against the carpet and the bare floor. The carpet has been the rough surface, that has been able to apply the friction force against the object.  

The bare floor has been the smooth surface that has been able to slide down the object without the application of any friction force that has been able to move the object faster.

Thus, the same object moves quicker through the bare floor than carpet as there has been no friction force acting on the object on the bare floor.

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Answer:Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

Answer:

Tonsillitis is inflammation of tonsils. It is caused by viral infection and very rarely by bacterial infection.

It is a very serious problem in case of children, adults and teenagers. The continuous coughing can lead to swelling in the throat which in case affects the  passage of airways.

This hindered air passage can cause breathing problems. The inflammation can also affect the passage of air and affects breathing.

Explanation:

Answer:

3

Explanation:

Red

Litmus paper turn red when it comes in contact with acid. It turn blue if it come in contact with a base. Neutral litmus paper is purple

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{3.3 \times 100000}{90000} = \frac{330000}{9000 } \\ = 3.666666...[/tex]

We have the final answer as

Hope this helps you

Answer:

both sugar and phosphate molecules

Answer:

Both sugar and phosphate molecules

Explanation:

Answer:

It's either A. or B. Im going with B. since the person is walking a constant speed

Explanation:

acceleration is basically when someone or something is increasing in speed

answer is atom.Hope it is helpful.

Answer:

Atoms are the smallest particles that made up matter.

Answer:

1235

Explanation:

if thers a  a guess in that number

The compound V₂O₅ has a Seebeck coefficient at a temperature of 50 °C of -990 μV/K.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds .Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Answer:

2 elements

Explanation:

There are the two elements that make water

Answer:

The enthalpy change of solution refers to the amount of heat that is released or absorbed during the dissolving process (at constant pressure).

Explanation:

Answer:

The final velocity of the motorcycle is 64.7 m/s

Note: Since the value for the acceleration of the motorcycle is not clear, it is assumed to be 4.55 m/s² in the calculation

Explanation:

Using the equation of motion that contains all the given values in the question: v² = u² + 2as

where v is final velocity; u is initial velocity; a is acceleration; s is horizontal distance

v = ?, u = 0 (since the motorcycle starts from rest), a = 4.55 m/s², s = 460 m

v² = 0² + 2 * 4.55 * 460

v² = 4186

take square root of both sides

v = 64.7 m/s

Therefore, the final velocity of the motorcycle is 64.7 m/s

Answer:

4.97 moles

Explanation:

There are  6.022*10^23 calcium  atoms  in 1 mole of  Ca

2.99*10^24/6.022*10^23

=4.97 moles

Answer:

4.97 mol

Explanation:

Given data:

Number of atoms of Ca = 2.99×10²⁴

Number of moles of Ca = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

2.99×10²⁴  atoms × 1 mol  / 6.022 × 10²³ atoms

0.497×10¹ mol

4.97 mol

Answer:

Aluminum iodide (AlI₃)

Explanation:

The synthesis reaction of aluminum (Al) and iodine (I) can be illustrated as shown below:

Aluminium exhibit trivalent positive ion (Al³⁺)

Iodine exhibit univalent negative ion (I¯)

During reaction, there will be an exchange of ion as shown below:

Al³⁺ + I¯ —> AlI₃

Thus, we can write the balanced equation for the reaction as follow:

Al + I₂ —› AlI₃

There are 2 atoms of I on the left side and 3 atoms on the right side. It can be balance by putting 2 in front of AlI₃ and 3 in front of I₂ as shown below:

Al + 3I₂ —› 2AlI₃

There are 2 atoms of Al on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Al as shown below:

2Al + 3I₂ —› 2AlI₃

Thus the equation is balanced.

The product on the reaction is aluminum iodide (AlI₃)

Answer:

mutualism,commensalism and parasitism

Answer:

mutualism, commensalism, and parasitism

Answer:

it's SrSO4

Explanation:

Answer:

It is an ionic bond.

Explanation:

Ionic bonds occur when a metal and a nonmetal combine, while covalent bonds occur between two nonmetals. Lithium is a metal and sulfur is a nonmetal.