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3 years ago

What do atom, molecules, and elements have in common

Chemistry

1 answer:

____ [38]3 years ago

6 0

Answer:

Solids, liquids, gases - all matter - are made up of atoms (or other things, like molecules, that are made from atoms)! ELEMENTS are the kinds of atoms that we can have. Carbon is an element, hydrogen is an element, and so is oxygen. ... Atoms can join together - they form bonds together - to make MOLECULES.

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Fill in the blank with the correct answer to complete the sentence.

guajiro [1.7K]

Explanation:

momentum increases with an increase in mass and velocity

3 0

3 years ago

What is the name of this molecule? h3c-c=c-ch3

Mamont248 [21]

Answer : The name of the given molecule is 2-butene or but-2-ene

Explanation :

Step 1 : Find the longest carbon chain.

The longest carbon chain for the given structure contains 4 carbons.

This will help us to find out the prefix for our parent compound.

The alkane with 4 carbons is "Butane"

Therefore our parent compound will have the prefix is "but"

Step 2 : Find the functional group

The functional group is the group that gives specific characteristics to the compound. In this case, we have a double bond in the structure which behaves as a functional group.

Therefore the functional group here is "Alkene"

Functional groups helps us to find the suffix of the name. In this case it is "ene"

Therefore our parent compound is but+ene = butene

Step 3 : Find the position of the double bond

The double bond is present between second and third carbon atom.

We always select the lower number to denote the position of the bond.

So we have 2-butene OR but-2-ene

There are no substituents present in this compound.

Therefore the name of the compound is 2-butene or But-2-ene

8 0

3 years ago

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36. Write a balanced chemical equation for each chemical reaction. (a) Solid copper reacts with solid sulfur to form solid coppe

stiks02 [169]

Answer:

a) 2Cu(s) + S(s) → Cu₂S(s)

b) 2SO₂(g) + O₂(g) → 2SO₃(g)

c) 4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)

d) C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)

Explanation:

First, we have to write the chemical formulas for reactants and products. Then, to identify which is the state of matter of each compound (liquid: l, solid: s, aqueous: aq, gas: g). Finally, we write the equation and balance the atoms.

a) Solid copper reacts with solid sulfur to form solid copper(I) sulfide.

Reactants: solid copper (Cu(s)) and solid sulfur (S(s)). Product: copper(I) sulfide (Cu₂S) because sulfur anion has two negative charges (S⁻²) and we need two copper ions with one positive charge (Cu⁺) to obtain the neutral compound.

The balanced requires a coefficient of 2 for Cu(s) to balance the 2 Cu atoms on the products side:

2Cu(s) + S(s) → Cu₂S(s)

(b) Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas.

Reactants: sulfur dioxide (SO₂) and oxygen gas (which is a diatomic molecule: O₂). Products: sulfur trioxide gas (SO₃(s)).

The balanced equation is:

2SO₂(g) + O₂(g) → 2SO₃(g)

We need a coefficient of 2 for SO₂ and SO₃ to balance O and S atoms.

(c) Aqueous hydrochloric acid reacts with solid manganese(IV) oxide to form aqueous manganese(II) chloride, liquid water, and chlorine gas.

Reactants: aqueous hydrochloric acid (HCl(aq)) and solid manganese (IV) oxide (MnO₂(s), because we need two oxygen anions O²⁻ to neutralize 4 positive charges in Mn IV). Products: aqueous manganese(II) chloride (MnCl₂, because we need two chloride ions Cl⁻ to neutralize two positive charges in Mn(II)), liquid water (H₂O), and chlorine gas (Cl₂, because it is a diatomic molecule).

The balanced chemical equation is:

4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)

(d) Liquid benzene (C₆H₆) reacts with gaseous oxygen to form carbon dioxide and liquid water.

Reactants: benzene (C₆H₆) and gaseous oxygen (O₂). Products: carbon dioxide (CO₂, because C has valence IV) and liquid water (H₂O).

The balanced chemical equation is:

C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)

In this case, we need a coefficient of 15/2 for O₂ because on the product side there are 15 atoms of O (12 in CO₂ and 3 in H₂O).

6 0

3 years ago

Select the correct answer

vekshin1

Answer:

Temperature

Explanation:

Kinetic energy of gass molecules is directly propotional to the temperature.

4 0

3 years ago

Read 2 more answers

What are the ions in these compounds? a. NH4BY b. K2HPO4 c. CUNO3

Ann [662]

Explanation:

If the compounds are dissociated, the ions are:

NH₄BY NH₄⁺ BY⁻

K₂HPO₄ K⁺ HPO₄²⁻

CuNO₃ Cu⁺ NO₃⁻

The given compounds assuming that they dissociate in solutions will produce the ions listed above.

The cations which are the positively charged ions in the above compounds are made up of metals and radicals.

The anions which are negatively charged ions are purely chemical radicals.

Learn more:

Cations brainly.com/question/4223679

#learnwithBrainly

4 0

3 years ago