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3 years ago

How do I know what to do and can you help me because I really need it I am failing chemistry because it is too hard.

Chemistry

1 answer:

Arlecino [84]3 years ago

4 0

Exothermic:

An Exothermic reaction is a chemical reaction that expels energy in the form of heat/light. Everything a Endothermic does not do. Pretty simple for this one

reactants → products + energy.

For future reference - Exo means release, thermic means heat.

<u>Energy is a Reactant </u>

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Endothermic:

An Endothermic reaction essentially is draining the heat energy from anything its its surroundings. Usually its just heat but can also be salt dissolving it water or ice melting. Another example would be frost on your windshield evaporating.

It is the exact opposite of an Exothermic reaction.

<u>Energy is a Product</u>

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The molecular weight of H 2 SO 4 is:<br><br> 49.078 g/mole<br> 98.086 g/mole<br> 194.296 g/mole

romanna [79]

Answer:

the molecular weight of H2SO4 is 98.086g/mole

8 0

4 years ago

When balancing a chemical equation, what are the large numbers that we adjust?

Nata [24]

Answer:

Coefficients

Explanation:

Chemical equations are first written as a skeleton equation, which includes how many atoms each element and compound has. Skeleton equations are not 'balanced' because the number of atoms of each element on the left side (reactants) is not equal to the right side (products).

To balance a chemical equation, you can write coefficients in front of single elements and compounds. The coefficient multiplies with each single element and with each element in the compound.

For example, in this skeleton equation:

H₂ + Cl₂ => HCl

Reactants: Products:

2 hydrogen 1 hydrogen

2 chlorine 1 chlorine

Write the coefficient 2 in the products.

H₂ + Cl₂ => 2HCl

Now both reactant and product sides have 2 chlorine and 2 hydrogen, so the equation is balanced.

6 0

4 years ago

What experimental evidence can you provide that the product isolated is 1-bromobutane?

Blizzard [7]

The experimental evidence that you could provide that <span> the product isolated is 1-bromobutane would be the changes that happens that are observable by the naked eye. Hope this helps. Have a nice day. Feel free to ask more questions.</span>

5 0

4 years ago

Read 2 more answers

What is the name of the molecular compound SF 5? sulfur pentafluoride sulfur hexafluoride sulfur heptafluoride monosulfur tetraf

romanna [79]

Answer: sulfur pentafluoride

Explanation:

The rules for naming of binary molecular compound :

In the given formula, the lower group number element is written first in the name and keep its element name and the higher group number is written second.

First element i.e. sulphur in the formula is named first and keep its element name.

1) Gets a prefix if there is a subscript on it such as mono for 1, di for 2, tri for 3 and so on.

Second element i.e. fluorine is named second.

1) Use the root of the element name, if it is an anion then use suffix (-ide).

2) Always use a prefix on the second element such as mono for 1, di for 2, tri for 3 and so on.

Therefore, the chemical name of compound $SF_5$ is sulfur pentafluoride

4 0

3 years ago

A 4.80g piece of magnesium (Mg) displaces 2.76mL of water when it is placed in a graduated cylinder. What is the density of magn

AnnZ [28]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{4.80}{2.76} \\ = 1.73913...$

We have the final answer as

Hope this helps you

8 0

3 years ago