What is atomic mass of iron?

Which of the following is

AleksandrR [38]

Answer:

distance and time are needed to find velocity

6 0

3 years ago

RATE LAW QUESTION !

vivado [14]

In general, we have this rate law express.:

$\mathrm{Rate} = k \cdot [A]^x [B]^y$
we need to find x and y

ignore the given overall chemical reaction equation as we only preduct rate law from mechanism (not given to us).

then we go to compare two experiments in which only one concentration is changed

compare experiments 1 and 4 to find the effect of changing [B]
divide the larger [B] (experiment 4) by the smaller [B] (experiment 1) and call it Δ[B]

Δ[B]= 0.3 / 0.1 = 3

now divide experiment 4 by experient 1 for the given reaction rates, calling it ΔRate:

ΔRate = 1.7 × 10⁻⁵ / 5.5 × 10⁻⁶ = 34/11 = 3.090909...

solve for y in the equation $\Delta \mathrm{Rate} = \Delta [B]^y$

$3.09 = (3)^y \implies y \approx 1$

To this point, $\mathrm{Rate} = k \cdot [A]^x [B]^1$

do the same to find x.
choose two experiments in which only the concentration of B is unchanged:

Dividing experiment 3 by experiment 2:
Δ[A] = 0.4 / 0.2 = 2
ΔRate = 8.8 × 10⁻⁵ / 2.2 × 10⁻⁵ = 4

solve for x for $\Delta \mathrm{Rate} = \Delta [A]^x$

$4= (2)^x \implies x = 2$

the rate law is

Rate = k·[A]²[B]

6 0

3 years ago

Name some of the chemical substances in a tea mixture

faltersainse [42]

Answer:

caffience

Explanation:

6 0

3 years ago

Which statement is correct about the reaction that occurs between sodium hydroxide and hydrochloric acid?

Alex

Answer

Hi, the correct answer is,

B. It is an acid-base reaction because the sodium hydroxide base reacts with the hydrochloric acid to form a salt and water

Explanation

When an acid reacts with a base, the products are salt and water.In this case, sodium hydroxide is a base which contains hydroxide ions, OH-, whereas hydrochloric acid is an acid that has Hydrogen ions, H+.When they react, they form sodium chloride, NaCl in aqueous solution as the salt , and additional water molecules. The equation is;

NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l)

7 0

4 years ago

Read 2 more answers

How many grams of \text{CO}_2CO 2 start text, C, O, end text, start subscript, 2, end subscript will be produced from 39.0 \te

Allushta [10]

Answer:

7.568g of CO₂ will be produced

Explanation:

Based on the reaction:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

Where 1 mole of C₃H₈ react with 5 moles of O₂ to produce 3 moles of CO₂ and 4 moles of H₂O

Moles of C₃H₈ and O₂ are:

C₃H₈: 39.0g ₓ (1mol / 44.1g) = 0.884 moles

O₂: 11.0g ₓ (1mol / 32g) = 0.344 moles

For a complete reaction of 0.884 moles of C₃H₈ are necessaries:

0.884 mol C₃H₈ ₓ (6 mol O₂ / 1 mol C₃H₈) = 5.304 moles of O₂

As you have just 0.344 moles of O₂, it is the limiting reactant.

And moles of CO₂ produced are:

0.344 mol O₂ ₓ (3 mol CO₂ / 6 mol O₂) = 0.172 moles of CO₂

Thus, mass in grams of CO₂ (44g / mol) is:

0.172 moles of CO₂ ₓ (44g / mol) = 7.568g of CO₂ will be produced

7 0

3 years ago