All categories

2 years ago

Two trains, A and B are moving at a speed of 20 km per hour

Chemistry

2 answers:

Fittoniya [83]2 years ago

6 0

Answer:

$\fbox {kinetic motion}$

Explanation:

As the trains are clearly in motion, we can understand the these trains possess kinetic energy, which is by virtue of a motion of a body.

Bad White [126]2 years ago

6 0

Answer:

type of energy that two train have are kinetic energy

You might be interested in

Nitrogen gas (N2) and hydrogen gas (H2) react to produce ammonia (NH3).

WINSTONCH [101]

Answer:

I believe it would be 2

Explanation:

if there are 2 nitrogen molecules then there would have to be 2 hydrogen molecules but this could be completely wrong

if this happens to be right, ur welcome :3 here's a Jay Jay pic for u cuz why not

8 0

2 years ago

Sodium phosphate is added to a solution that contains 0.0030 M aluminum nitrate and 0.016 M calcium chloride. The concentration

gavmur [86]

Explanation:

It is given that aluminium nitrate and calcium chloride are mixed together with sodium phosphate.

And, $K_{sp} of AlPO_{4} = 9.84 \times 10^{-21}$

$K_{sp} of Ca_{3}(PO_{4})_{2} = 2.0 \times 10^{-29}$

Let us assume that the solubility be "s". And, the reaction equation is as follows.

$AlPO_{4} \rightleftharpoons Al^{3+} + PO^{3-}_{4}$

$9.84 \times 10^{-21} = s \times s$

s = $9.92 \times 10^{-11}$

Also, $Ca_{3}(PO_{4})_{2} \rightleftharpoons 3Ca^{2+} + 2PO^{3-}_{4}$

$2 \times 10^{-29} = (3s)^{3} \times (2s)^{2}$

s = $7.14 \times 10^{-7}$

This means that first, aluminium phosphate will precipitate.

Now, we will calculate the concentration of phosphate when calcium phosphate starts to precipitate out using the $K_{sp}$ expression as follows.

$K_{sp} = [Ca^{2+}]^{3}[PO^{3-}_{4}]^{2}$

$2.0 \times 10^{-29} = (0.016)^{3}[PO^{3-}_{4}]^{2}$

$2.0 \times 10^{-29} = 4.096 \times 10^{-6} \times [PO^{3-}_{4}]^{2}$

$[PO^{3-}_{4}]^{2}$ = $4.88 \times 10^{-24}$

= $2.21 \times 10^{-12}$ M

Similarly, calculate the concentration of aluminium at this concentration of phosphate as follows.

$AlPO_{4} \rightleftharpoons Al^{3+} + PO^{3-}_{4}$

$K_{sp} = [Al^{3+}][PO^{3-}_{4}]$

$9.84 \times 10^{-21} = [Al^{3+}] \times 2.21 \times 10^{-12}$

$[Al^{3+}] = 4.45 \times 10^{-9}$ M

Thus, we can conclude that concentration of aluminium will be $4.45 \times 10^{-9}$ M when calcium begins to precipitate.

7 0

3 years ago

QUESTION 1 Species diversity is comprised of O Composition and Richness O Richness and Frequency O Evenness and Composition Rich

34kurt

Answer:

The correct option is: Richness and Evenness

Explanation:

Species diversity is the measurement of the biological diversity and relative abundance of each species found in a particular biological community.

It is comprised of the following three components:

1. richness (number of species)

2. phylogenetic diversity

3. evenness (relative abundance of each species)

3 0

3 years ago

What is the relationship between mass, distance and gravity?

romanna [79]

Answer:

Mass is the measure of the amount of matter in an object. We see that the gravitational force between objects increases as the masses of the objects increase. With distance, we see that the strength of gravity decreases if the distance between two objects increases.

Explanation:

The amount of gravity affecting an object depends on two things: the masses of the objects being attracted and the distance between the objects. Mass is the measure of the amount of matter in an object. ... With distance, we see that the strength of gravity decreases if the distance between two objects increases

6 0

3 years ago

A sample of 79.3 g of hydrogen bromide is reacted with 80.0 g of barium hydroxide to produce barium bromide and water. Using the

icang [17]

A Hydrogen bromide, 0.490 moles ???

6 0

2 years ago

Read 2 more answers