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3 years ago

A chemical formula includes the symbols of the elements in the

Chemistry

2 answers:

german3 years ago

6 0

How many atoms or ions are combined in a simple unit

Sphinxa [80]3 years ago

3 0

Answer:

it indicates, how many atoms or ions of each type are combined in the simplest unit.

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A 10.0-milliliter sample of NaOH(aq) is neutralized by 40.0 milliliters of 0.50 M HCl. What is the molarity of the NaOH(aq)?

Ludmilka [50]

$\frac{10 mL}{1000 mL} = 0.01 L$

$\frac{40mL}{1000mL} =0.04L$

$M _{1} V_{1}=M_{2}V_{2}$

$M_{1}(0.01)=(0.50)(0.04)$

$M_{1}(0.01)=0.02$

$M_{1}= \frac{0.02}{0.01}$

$M_{1}=2$

3 0

3 years ago

When objects of two different temperature are in contact, what happens?

Sonja [21]

Answer: C. the warmer object transfers heat energy to the cooler side

5 0

1 year ago

Read 2 more answers

If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's la

jekas [21]

We have that the total enthalpy of the reaction changes with the quantity of the reactants and it is proportional to them. Also, the reverse of a reaction has the opposite enthalpy. Hence, since we need to multiply by 2, the reactants are double and thus the value of the enthalpy is 2 as big. Also, since we are using the inverse reaction, we must also invert the sign. Thus, for this reaction we must use the value H=572 kJ.

4 0

2 years ago

The primary metallic element that's added to steel to make stainless steel is

iogann1982 [59]

The answer is D. Stainless steel is made up of the metals, chromium, nickel, among others like aluminum and silicone.

6 0

3 years ago

Would you expect the carbonyl carbon of benzaldehyde to be more or less electrophilic than that of acetaldehyde? Explain using r

Slav-nsk [51]

Answer:

Benzaldehyde is less electrophilic than acetaldehyde

Explanation:

Electrophilicity of carbonyl carbon depends on it's positive charge density.

In benzaldehyde, phenyl group can act as an electron donating group towards carbonyl group due to it's electron donating resonating effect.

In acetaldehyde, methyl group can act as an electron donating group towards carbonyl group due to it's electron donating inductive effect.

We know that resonating effect are more stronger than inductive effect.

Henece, it is expected that positive charge density on carbonyl carbon is much lower in benzaldehyde than acetaldehyde.

So, benzaldehyde is less electrophilic than acetaldehyde.

Resonating effect of phenyl group has been shown below.

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3 years ago