All categories

2 years ago

Marking brainliest hurry !

Chemistry

2 answers:

jek_recluse [69]2 years ago

7 0

Answer:

B. A body at rest will stay at rest until it is acted upon by another object

Explanation:

Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Kitty [74]2 years ago

5 0

Answer:

The correct answer is b.

Explanation:

You might be interested in

g You observed the formation of several precipitates in the Reactions in Solution lab exercise. Identify the precipitate in each

RUDIKE [14]

Answer:

For a: Lead iodide is a yellow precipitate.

For b: Barium sulfate is a white precipitate.

For c: Ferric hydroxide is a brown precipitate.

For d: Copper (II) hydroxide is a blue precipitate.

Explanation:

Precipitation reaction is defined as the reaction where a solid precipitate (solid substance) is formed at the end of the reaction. It is insoluble in water.

For the given options:

For (a):

The chemical reaction between KI and lead (II) nitrate follows:

$2KI(aq)+Pb(NO_3)_2(aq)\rightarrow PbI_2(s)+2KNO_3(aq)$

The iodide of lead is generally insoluble in water. Thus, lead iodide is a yellow precipitate.

For b:

The chemical reaction between barium chloride and sulfuric acid follows:

$BaCl_2(aq)+H_2SO_4(aq)\rightarrow BaSO_4(s)+2HCl(aq)$

The sulfate of barium is insoluble in water. Thus, barium sulfate is a white precipitate.

For c:

The chemical reaction between NaOH and ferric chloride follows:

$3NaOH(aq)+FeCl_3(aq)\rightarrow Fe(OH)_3(s)+3NaCl(aq)$

The hydroxide of iron is insoluble in water. Thus, ferric hydroxide is a brown precipitate.

For d:

The chemical reaction between NaOH and copper sulfate follows:

$CuSO_4+2NaOH\rightarrow Cu(OH)_2+Na_2SO_4$

The hydroxide of copper is insoluble in water. Thus, copper (II) hydroxide is a blue precipitate.

6 0

2 years ago

A gas at 300 k and 4.0 atm is moved to a new location with a temperature of 250 k. the volume changes from 5.5 l to 2.0 l. what

ella [17]

Answer:

9.17 atm

Explanation:

To find the new pressure of the gas, you need to use the following manipulated formula:

P₁V₁ / T₁ = P₂V₂ / T₂

In this formula,

P₁ = initial pressure (atm) P₂ = new pressure (atm)

V₁ = initial volume (L) V₂ = new volume (L)

T₁ = initial temperature (K) T₂ = new temperature (K)

Because you have been given values for all of the variables except for the new pressure, you can substitute them into the equation and simplify.

P₁ = 4.0 atm P₂ = ? atm

V₁ = 5.5 L V₂ = 2.0 L

T₁ = 300 K T₂ = 250 K

P₁V₁ / T₁ = P₂V₂ / T₂ <----- Given formula

(4.0 atm)(5.5 L) / (300 K) = P₂(2.0 L) / (250 K) <----- Insert variables

0.073333 = P₂(2.0 L) / (250 K) <----- Simplify left side

18.33333 = P₂(2.0 L) <----- Multiply both sides by 250

9.17 = P₂ <----- Divide both sides by 2.0

5 0

1 year ago

Read 2 more answers

15 Points. Pls give a real answer this is due in an hour.

bonufazy [111]

Answer:

This tells us that for every 2 moles of potassium chlorate that are decomposed, then 3 moles of oxygen gas is produced.

7 0

3 years ago

What is instantaneous acceleration?A. how fast a speed is changing at a specific instant B. how fast a velocity is changing at a

joja [24]

If i had to answer i would choose a hope this helps

8 0

2 years ago

what the greatest agent of change?water/wind/ice how does this agent continue to weathering lake annette

cluponka [151]

Answer:

Explanation:

water/wind/ice how does this agent continue to weathering lake annette

erosion

The process known as weathering breaks up rocks so that they can be carried away by the process known as erosion. Water, wind, ice, and waves are the agents of erosion that wear away at the surface of the Earth

5 0

2 years ago