All categories

2 years ago

Give the numbers of significant figures indicated 60.1 0 3 1 2

Chemistry

2 answers:

QveST [7]2 years ago

6 0

3 is the correct answer

denpristay [2]2 years ago

4 0

3 significant figures

You might be interested in

propose a synthetic route for the synthesis of a named alkanal starting with ethyl formate and grignard reagent.

rusak2 [61]

Answer:

See explanation and image attached

Explanation:

A Grignard reagent is an alkyl magnesium halide. If it reacts with ethyl formate, an intermediate is formed as shown.

This intermediate can undergo water hydrolysis to form a diol, ethanol and MgBrOH.

Oxidation of the diol obtained now yields the corresponding alkanal which in this case is ethanal.

The scheme of the reaction is shown in the image attached to this answer.

3 0

3 years ago

How many Group 17 elements are in Period 3 of the Periodic Table? A) 1 B) 2 C) 3 D) 4

Galina-37 [17]

Answer: A (1)

I hope that helps :)

7 0

3 years ago

Multiple choice-- please help!

kvasek [131]

The rate law for the reaction : r=k.[A]²

<h3>Further explanation</h3>

Given

Reaction

A ⟶ B + C

Required

The rate law

Solution

The rate law is a chemical equation that shows the relationship between reaction rate and the concentration / pressure of the reactants

For the second-order reaction it can be:

1. the square of the concentration of one reactant.

$\tt r=k[A]^2$

2. the product of the concentrations of two reactants.

$\tt r=k[A][B]$

And the reaction should be(for second order) :

2A ⟶ B + C

Thus, for reaction above (reactant consumption rate) :

$\tt r=-\dfrac{\Delta A}{2\Delta t}=k[A]^2$

6 0

2 years ago

Among teenagers, what is the most commonly used substance?

Rudik [331]

'alcohol'<span>The most commonly used and abused substance in terms of prevalence and recency of use.</span>

3 0

3 years ago

Why are valence electrons important when considering the bonds that form between atoms g

salantis [7]

Answer:Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Explanation::)

7 0

3 years ago