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3 years ago

I think its A can someone help me?

Chemistry

2 answers:

ratelena [41]3 years ago

5 0

The answer is A) Scientific Law

AfilCa [17]3 years ago

3 0

Yes A is correct because your experiment always changes and so does your hypothesis and your theory can change but will not always

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Choose a generic equation showing how a weak base ionizes water.

FinnZ [79.3K]

Hi!

The generic equation showing how a weak base ionizes water is the following:

B(aq) + H₂O(l) ⇄ BH⁺(aq) + OH⁻(aq)

A base is described as weak when its dissociation is difficult and isn't complete. Weak Bases are chemical compounds that accept protons from water, to form the conjugate acid and the OH⁻ ion. The pH of the solution of a weak base is higher than 7. Some weak bases include ammonia (NH₃), Aluminum Hydroxide (Al(OH)₃) and Sodium Acetate (CH₃COONa).

Have a nice day!

4 0

3 years ago

Type of reaction in NaOH + KNO3 → NaNO3 + KOH

Lesechka [4]

Answer:

It is a combustion reaction

Explanation:

6 0

3 years ago

Cho m gam FeO tác dụng hết với dung dịch H2SO4, thu được 200 ml dung dịch FeSO4 1M. Giá trị của m là

BaLLatris [955]

<u>Answer:</u> The mass of $FeO$ required is 14.37 g

<u>Explanation:</u>

Molarity is calculated by using the equation:

$\text{Molarity}=\frac{\text{Moles}}{\text{Volume}}$ ......(1)

We are given:

Molarity of iron (II) sulfate = 1 M

Volume of solution = 200 mL = 0.200 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

$\text{Moles of }FeSO_4=(1mol/L\times 0.200L)=0.200mol$

The chemical equation for the reaction of FeO with sulfuric acid follows:

$FeO+H_2SO_4\rightarrow FeSO_4+H_2O$

By stoichiometry of the reaction:

If 1 mole of iron (II) sulfate is produced by 1 mole of FeO

So, 0.200 moles of iron (II) sulfate will produce = $\frac{1}{1}\times 0.200=0.200mol$ of FeO

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

We know, molar mass of $FeO$ = 71.84 g/mol

Putting values in above equation, we get:

$\text{Mass of }FeO=(0.200mol\times 71.84g/mol)=14.37g$

Hence, the mass of $FeO$ required is 14.37 g

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3 years ago

GUYS I NEED YOUR HELP. IF ANYONE IS IN K12 CHEM I WILL PAY YOU. I JUST NEED THESE LABS: CHEMICAL REACTIONS LAB HONORS PROJECT I

Lerok [7]

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3 years ago

The pressure inside an an automobile tire is 44.0 pounds per square inch on a warm summer day (44.0 degree Celcius). Calculate t

umka21 [38]

Assuming ideal gases, and that there is no volume variation,

$P_0/T_0=P_1/T_1\Rightarrow P_1=P_0T_1/T_0=33.0\ \text{pounds/inch}^2$

And use the temperature transformation from Celsius to Kelvin.

$T(K)=T(C)+273$

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3 years ago