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2 years ago

PLEASE ANSWER !!!

Chemistry

2 answers:

Tju [1.3M]2 years ago

8 0

Answer:

Synthesis

Explanation:

There are two reactants and one product. This only happens in synthesis reactions.

V125BC [204]2 years ago

6 0

The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2). Energy will be released in the process.

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If you have two pistons in a system, which exerts the larger force?

Alik [6]

Answer:

The larger piston

Explanation:

(i just took the same test)

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2 years ago

The density of a 22.0% by mass ethylene glycol (c2h6o2) solution in water is 1.04 g/ml . part a find the molarity of the solutio

julsineya [31]

Answer:- 3.68M.

Solution:- We have a 22.0% by mass solution of ethylene glycol and it's density is 1.04 gram per mL. It ask to calculate the molarity of the solution. We know that molarity is moles of solute per liter of solution. So, we need to figure out the moles of ethylene glycol and volume of solution.

Let's say we have 100 grams of the solution. Then mass of ethylene glycol would be 22.0 grams. Molar mass of ethylene glycol is 62.07 gram per mol.

Let's calculate it's moles first:

$22.0gC_2H_6O_2(\frac{1mol}{62.07g})$

= $0.354molC_2H_6O_2$

From mass and density we calculate the volume of the solution and convert it to liters as:

$100g(\frac{1mL}{1.04g})(\frac{1L}{1000mL})$

= 0.0962 L

$molarity=\frac{0.354mol}{0.0962L}$

= 3.68M

So, the molarity of ethylene glycol solution is 3.68M.

4 0

3 years ago

Which statement best explains how organ systems work together to remove wastes?

soldier1979 [14.2K]

Answer:

Explanation:

Carbon Dioxide is one of waste produced from Our cells during respiration. The circulatory system carries Carbon Dioxide from cells either in haemaglobin in RBC or plasm. The Carbon Dioxide being carried to blood cappilaries near alveoli before diffused into alveoli and then being removed away by respiratory system in the process of respiration while we exhale

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3 years ago

What is the mass of oxygen in 25.0 grams of potassium permanganate , KMnO4?

Katen [24]

Answer:

10.76 grams

Explanation:

Given that the amount of $KMnO_4$ is 25.0 grams.

Mass of 1 mole of $KMnO_4$ = 158 grams

The number of atoms in 1 mole of $KMnO_4$ is 4.

Mass of oxygen in 1 mole of $KMnO_4$ = 16\times 4 = 68 grams.

Here, 158 grams of $KMnO_4$ has 68 grams of oxygen

So, the amount of oxygen in 1 gram of $KMnO_4$ = 68/158 grams

Therefore, the amount of oxygen in 1 gram of $KMnO_4$ = $\frac {68}{158}\times 25$ grams

=10.76 grams

Hence, 25 grams of $KMnO_4$ has 10.76 grams of oxygen.

3 0

2 years ago

Read 2 more answers

How many molecules are in

diamong [38]

Answer:

3.6 × 10²⁴ molecules

Explanation:

Step 1: Given data

Moles of methane (n): 6.0 moles

Step 2: Calculate the number of molecules of methane in 6.0 moles of methane

In order to convert moles to molecules, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules of methane in 1 mole of molecules of methane.

6.0 mol × 6.02 × 10²³ molecules/1 mol = 3.6 × 10²⁴ molecules

6 0

2 years ago