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3 years ago

Burgundy Mixture is a formulation used to kill fungi on grapevines.

Chemistry

1 answer:

mihalych1998 [28]3 years ago

5 0

The mass of A needed in a mixture : 15.625 g

<h3>Further explanation</h3>

Given

A mixture of A and B

Ratio A : B = 1 : 8

mass b = 125 g

Required

The mass of A

Solution

Proust states <em>the Comparative Law</em> that compounds are formed from elements with the same Mass Comparison so that compounds have a constant composition of elements

Mass of A (from the mass of B):

= 1/8 x 125 g

= 15.625 g

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Determine the formula of chromic acid.

Katyanochek1 [597]

<u>Answer:</u> The formula of chromic acid is $H_2CrO_4$

<u>Explanation:</u>

We are given an ionic compound named as chromic acid. This acid is formed by the combination of hydrogen ion and chromate ion.

An acid is defined as the substance which releases hydrogen ion when dissolved in water.

Hydrogen is the 1st element of periodic table having electronic configuration of $1s^1$ .

This element will loose 1 electron to form $H^{+}$ ion.

Chromate ion is a polyatomic ion having chemical formula of $CrO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is $H_2CrO_4$

Thus, the formula of chromic acid is $H_2CrO_4$

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3 years ago

Use the periodic table to identify each of the following bonds as polar or nonpolar.

iren2701 [21]

Answer:

C - Cl = Polar (Chlorine has an electronegativity of 3.16 and Carbon has 2.55. The difference between the two determines if the bond is polar or non polar, and the difference is 0.61 which means its polar)

Br - Br = Non-polar (Diatomic molecules are non-polar)

N - O= Non-polar ( The electronegativity difference is 0.4, making it non-polar)

P - Cl= Polar (The difference in electronegativity between them is 0.97, making it polar)

5 0

3 years ago

10pt if given the correct answer I will mark you as brainliest

diamong [38]

Answer:

Explanation:

4(Al)+3(O2)==2(Al2O3)

Also, i'm in sixth grade just took a leson on a text book so may be wrong but i'm prety sure it's the correct nswer because x(Al)+y(O2) can not make hydregen for the h2o and for b, al+so2 = al2O3 makes sense but where did the sulfer go?

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3 years ago

Read 2 more answers

Draw the products of benzoic acid reacting with sodium hydroxide.

Katena32 [7]

Answer:

Products: C6H5COO-Na+ (aq) + H2O (l)

Explanation:

when the benzoic acid react with sodium hydroxide, the acid part i.e carboxyl group is react with the base and produce ionic compound sodium benzoate (C6H5COO-Na+).

Chemical equation:

C6H5COOH + NaOH → C6H5COO-Na+ + H2O

Chemical reaction with physical states:

C6H5COOH (s) + NaOH (aq) → C6H5COO-Na+ (aq) + H2O (l)

Sodium benzoate is very polar ionic compound and soluble in water. If we add HCl into this solution sodium benzoate will be converted back into benzoic acid.

Properties of benzoic acid:

1. it is colorless solid.

2. it is crystalline in nature.

3. it is aromatic compound with the formula C7H6O2.

4. it is soluble into benzene, alcohol and ether.

5. its molar mass is 122.12 g/mol.

Properties of sodium benzoate:

1. Sodium benzoate is white odorless chemical compound.

2. It is aromatic compound and molecular formula is C7H5NaO2.

3. Its molecular weight is 144.11 g/mol.

4. it is sweet in taste and soluble in water.

5. it is used as preservative because of its antimicrobial properties.

Properties of Sodium hydroxide:

1. it is colorless solid and inorganic compound.

2. it is crystalline in nature.

3. its molar mass is 40 g/mol.

4. its molecular formula is NaOH.

5. its melting point is 318 °C.

6 0

3 years ago

An adiabatic throttling valve expands an ideal gas. The internal energy of the ideal gas?

just olya [345]

The internal energy of the ideal gas is zero

The change in internal energy for an isothermal process is zero.

An ideal gas has no interactions between particles, therefore no intermolecular forces.

pressure change at constant temperature does not change the internal energy.

Adiabatic throttling expansion has less work done and lower heat flow.

That lower the internal energy.

The temperature decreases during the adiabatic expansion

Hence the internal energy of the ideal gas is zero

Learn more about the ideal gas on

brainly.com/question/17136449

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3 0

2 years ago