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4 years ago

Waves transfer A density B energy C heat D matter

Chemistry

2 answers:

Airida [17]4 years ago

8 0

It must be energy because there can be different densities, heat, matter in different places

LiRa [457]4 years ago

6 0

Answer:

energy

Explanation:

Waves transfer energy from one place to another

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A 1.00 L volume of HCl reacted completely with 2.00 L of 1.50 M Ca(OH)2 according to the balanced chemical equation below. 2HCl

wolverine [178]

Answer:

$\boxed{\text{6.00 mol/L}}$

Explanation:

(a) Balanced equation

2HCl + Ca(OH)₂ ⟶ CaCl₂ + 2H₂O

(b) Moles of Ca(OH)₂

$\text{Moles of base} = \text{2.00L} \times \dfrac{\text{1.50 mol}}{\text{1 L}} = \text{3.000 mol base}$

(c) Moles of HCl

$\text{Moles of HCl} = \text{3.000 mol base} \times \dfrac{ \text{2 mol HCl}}{\text{1 mol base}} = \text{6.000 mol HCl}$

(d) Molar concentration of HCl

$\text{Molar concentration} = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{ n }{ V}\\\\c= \dfrac{ \text{6.000 mol}}{ \text{1.000 L}} = \text{6.00 mol/L}$

The molar concentration of the HCl was $\boxed{\textbf{6.00 mol/L}}$

6 0

4 years ago

Read 2 more answers

Fossilized remains of similar plant species were found in all four layers of the rock in the diagram above. Which of the followi

Snowcat [4.5K]

Answer:

A and C

Explanation:

so D

7 0

3 years ago

Read 2 more answers

A textbook measures 250 mm long, 225 mm wide and 50 mm thick. What is the volume of this book in mm3? What is the volume of this

Dvinal [7]

Answer:

2.81 × 10⁶ mm³

2.81 × 10⁻³ m³

Explanation:

Step 1: Given data

Length (l): 250 mm

Width (w): 225 mm

Thickness (t): 50 mm

Step 2: Calculate the volume of the textbook

The book is a cuboid so we can find its volume (V) using the following expression.

V = l × w × t = 250 mm × 225 mm × 50 mm = 2.81 × 10⁶ mm³

Step 3: Convert the volume to cubic meters

We will use the relationship 1 m³ = 10⁹ mm³.

2.81 × 10⁶ mm³ × 1 m³ / 10⁹ mm³ = 2.81 × 10⁻³ m³

6 0

3 years ago

During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction?

Brut [27]

Answer:

850g/min

Explanation:

The reaction expression is given as:

P₄ + 5O₂ → P₄O₁₀

Given that:

Number of moles of product = 1.5moles

Time = 30s = 0.5min

Unknown:

The rate of the reaction = ?

Solution:

Convert the moles given to mass of the product.

So;

Mass of product = number of moles x molar mass

Molar mass of P₄O₁₀ = 4(31) + 10(16) = 284g/mol

Mass of product = 1.5moles x 284g/mol = 426g

So;

Reaction rate = $\frac{mass of product}{time}$ = $\frac{426}{0.5}$ = 850g/min

8 0

3 years ago

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate according to the follow

fiasKO [112]

Answer:- Third choice is correct, 17.6 moles

Solution:- The given balanced equation is:

$Al_2(SO_4)_3+6KOH\rightarrow 2Al(OH)_3+3K_2SO_4$

We are asked to calculate the moles of potassium hydroxide needed to completely react with 2.94 moles of aluminium sulfate.

From the balanced equation, there is 1:6 mol ratio between aluminium sulfate and potassium hydroxide.

It is a simple mole to mole conversion problem. We solve it using dimensional set up as:

$2.94molAl_2(SO_4)_3(\frac{6molKOH}{1molAl_2(SO_4)_3})$

= 17.6 mol KOH

So, Third choice is correct, 17.6 moles of potassium hydroxide are required to react with 2.94 moles of aluminium sulfate.

8 0

4 years ago