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3 years ago

Which section of the reaction represents the products? A) a B) b C) c D) d

Chemistry

2 answers:

Zanzabum3 years ago

8 0

Answer: D) d

Explanation:

$Ba(OH)_2(s)+2NH_4NO_3(s)\overset{light}\rightarrow Ba(NO_3)_2(s)+2NH_3(aq)+10H_2O(l)$

Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow. Part labelled as a.

Thus barium hydroxide and ammonium nitrate are reactants of the reaction.

Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow. part labeled as d.

Thus barium nitrate, ammonia and water are products of the reaction.

Heat is the necessary condition for the reaction. Labeled as b.

vladimir2022 [97]3 years ago

6 0

The answer will be D because the reaction is what's first(A) and then it is the product that comes out.

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Technetium has a half-life of six hours. If you obtain 100g of a pure technetium sample, after 18 hours how much of the pure sub

IgorLugansk [536]

Answer:

After 18 hours, the amount of pure technetium that will be remaining is 12.5 grams

Explanation:

To solve the question, we note that the equation for half life is as follows;

$N(t) = N_0 (\frac{1}{2} )^{\frac{t}{t_{1/2}}$

Where:

N(t) = Quantity of the remaining substance = Required quantity

N₀ = Initial radioactive substance quantity = 100 g

t = Time duration = 18 hours

${t_{1/2}$ = Half life of the radioactive substance = 6 hours

Therefore, plugging in the values, we have;

$N(t) = 100 (\frac{1}{2} )^{\frac{18}{6}} = 100 (\frac{1}{2} )^{3} = \frac{100 }{8} = 12.5 \ grams$

Therefore, after 18 hours, the amount of pure technetium that will be remaining = 12.5 grams.

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3 years ago

Is Italian salad dressing a pure substance or a mixture ?

Evgen [1.6K]

Answer:mixture

Explanation:

4 0

3 years ago

According to the usda food standards and labeling, vinegar must contain at least 4% (m/m) acetic acid. does your vinegar sample

Anastasy [175]

Answer:

A for me

Explanation:

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2 years ago

Given the following sets of values, calculate the unknown

weqwewe [10]

Answer:

3.91 L

Explanation:

Using the ideal gas law equation as follows:

PV = nRT

Where:

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

Based on the information given in this question,

P = 5.23 atm

V= ?

n = 0.831 mol

T = 27°C = 27 + 273 = 300K

Using PV = nRT

V = nRT/P

V = (0.831 × 0.0821 × 300) ÷ 5.23

V = 20.47 ÷ 5.23

V = 3.91 L

8 0

3 years ago

Please Help Me!!!

sergejj [24]

Answer:

The products are carbon dioxide and water

Explanation:

Step 1: Data given

Combustion = a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant.

Step 2: The complete combustion of C3H7OH:

For the combustion of 1-propanol, we need O2.

The products of this combustion are CO2 and H2O.

C3H7OH + O2→ CO2 + H2O

On the left side we have 3x C (in c3H7OH), on the right side we have 1x C (in CO2). To balance the amount of C, we have to multiply CO2 on the right side by 3

C3H7OH + O2→ 3CO2 + H2O

On the left side we have 8x H (in C3H7OH) and 2x on the right side (in H2O). To balance the amount of H, we have to multiply H2O, on the right side by 4.

C3H7OH + O2→ 3CO2 + 4H2O

On the left side we have 3x O (1x in C3H7OH and 2x in O2), on the right side we have 10x O (6x in CO2 and 4x in H2O).

To balance the amount of O on both sides, we have to multiply C3H7OH by 2, multiply O2 by 9. Then we have to multiply 3CO2 by 2 and 4H2O by 2. Now the equation is balanced.

2C3H7OH + 9O2→ 6CO2 + 8H2O

For 2 moles propanol, we need 9 moles of O2 to produce 6 moles of CO2 and 8 moles Of H2O

The products are carbon dioxide and water

7 0

3 years ago