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adelina 88 [10]
3 years ago
15

Which of the following is a pure substance?

Chemistry
1 answer:
Mazyrski [523]3 years ago
8 0

Answer:

1. B

2. 100 C

3.  C

4. D

5. D

Explanation:

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hodyreva [135]

. How many joules of heat are absorbed to raise

the temperature of 37 grams of water from 25°C

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7 0
2 years ago
Give the product expected when the following alcohol reacts with pyridinium chlorochromate (PCC). (Assume that PCC is present in
Hoochie [10]

Answer:

Kindly check the explanation section.

Explanation:

Based on the description of the reacting -OH group containing Compound, the drawing of the chemical compound is given in the attached picture.

So, without mincing words let's dive straight into the solution to the question.

The reaction between the OH containing compound and PCC is an oxidation reaction.

Looking at the carbon number 1 which the first OH group and CH3 are attached to. Oxidation can not occur here as tertiary alcohol can not be oxidize.

Hence, the second OH will be oxidized into a carbonyl group, C = O. Kindly note that when alcohol oxidizes it turns into an aldehyde.

The equation for the reaction is also given the the attached picture.

8 0
3 years ago
How many molecules of Carbon<br> Dioxide (CO2) are there in 2 CO2?
Dima020 [189]

There are 2 molecules of Carbon dioxide(CO2)

<h3>Further explanation</h3>

Given

Molecules of CO2

Required

The number of molecules

Solution

The coefficient of a molecule shows the number of that molecule, while the subscript after the name of the atom indicates the number of that atom in the molecule

Because there is a coefficient of 2 in front of the CO2 molecule, then the number of CO2 molecules is 2

5 0
3 years ago
10. What are the reactants and the products in the
Ivahew [28]

Answer:

B

Explanation:

Reactants: H20 and Oz; Product: H202

3 0
3 years ago
Th muscular system and the skeletal system of work together so the body can______.
MA_775_DIABLO [31]

The answer is D because moving all of the body parts would get the heart racing and the blood pumping!

7 0
3 years ago
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