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3 years ago

What are the six steps of the scientific method in the correct order that they should occur?

Chemistry

1 answer:

trasher [3.6K]3 years ago

8 0

The answer is B

Because u ask questions first, then do a background research about the topic, then construct hypothesis for the topic, then test with an experiment, analyze results and form conclusions, report the results

You might be interested in

Where would you have the least weight?

Vikki [24]

In a place with no gravity

Explanation:

Weight is a force exerted by a body in the presence of gravity.

Weight = mass x gravity

Without gravity, there is no force of weight. The more the gravity, the more the weight of a body.

A body will experience weightlessness in a place without no gravity.

Therefore, one will experience the least weight in a place without the pull of gravity.

Learn more:

weight and mass brainly.com/question/5956881

#learnwithBrainly

8 0

4 years ago

Is it possible to have boiling ice water?

Virty [35]

Answer:

Possibly

Explanation:

Cold water does not boil faster than hot water. ... As a result, cold water will be absorbing heat faster while it is still cold; once it gets up to the temperature of hot water, the heating rate slows down and from there it takes just as long to bring it to a boil as the water that was hot to begin with.

8 0

3 years ago

PLEASE HELP ME NOWwwwwwwwwwWwWWE

Ira Lisetskai [31]

The answer is D! This is because there is a change the colour, a change in odor and a precipitate formed!

7 0

3 years ago

Can anyone help me out please?

Wewaii [24]

Answer:

Qustion 7: 

Answer is → "c. Calcium ions and sulfate ions join together to form an insoluble compound"

Question 8: 

Answer is → b. ²³⁹Pa

Question 9: 

Answer is → "c. 1/3 the pressure in container B"

Explanation:

=================================================================

Qustion 7: 

from the graph:

a. precipitation reactions only occur when solution temperature are decreased.

this option is wrong due to precipitation reaction can occur at room temperature or even at elevated temperature.

b. Sodium ions and chloride ions repel each other when they are in a solution.

Also, this is a wrong statement because sodium ions is positively charged and attract the negatively charged chloride ions.

d. the creation of precipitate adds mass that was previously non-existent.

From graph it is clear that the mass doesn't changed before and after the reaction remain constant (=300.23 g).

So, the right answer is

→ "c. Calcium ions and sulfate ions join together to form an insoluble compound"

=================================================================

Question 8: 

According to the equation :

²³⁹U → ________+ ₋₁⁰e
uranium(239) loses a beta particle and so the mass numer will not change ( remains 239).

So, the right answer is

→ b. ²³⁹Pa

=================================================================

Question 9: 

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

If n and T are constant, and have two different values of P and V:

Pₐ * Vₐ= P(b) *V(b)

from the graph:

Vₐ= 9.0 L.

V(b)= 3.0 L.

∴ Pₐ = [P(b) * V(b)] / Vₐ = [P(b) * 3.0 L] / 9.0 L = 1/3 P(b).

So, the right choice is:

Answer is → "c. 1/3 the pressure in container B"

=================================================================

3 0

3 years ago

A compound decomposes by a first-order process. What is the half-life of the compound if 25.0% of the compound decomposes in 60.

amid [387]

Answer : The half-life of the compound is, 145 years.

Explanation :

First we have to calculate the rate constant.

Expression for rate law for first order kinetics is given by:

$k=\frac{2.303}{t}\log\frac{a}{a-x}$

where,

k = rate constant = ?

t = time passed by the sample = 60.0 min

a = let initial amount of the reactant = 100 g

a - x = amount left after decay process = 100 - 25 = 75 g

Now put all the given values in above equation, we get

$k=\frac{2.303}{60.0}\log\frac{100g}{75g}$

$k=4.79\times 10^{-3}\text{ years}^{-1}$

Now we have to calculate the half-life of the compound.

$k=\frac{0.693}{t_{1/2}}$

$4.79\times 10^{-3}\text{ years}^{-1}=\frac{0.693}{t_{1/2}}$

$t_{1/2}=144.676\text{ years}\approx 145\text{ years}$

Therefore, the half-life of the compound is, 145 years.

8 0

4 years ago