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1 year ago

Hello people ~help me with these questions

Chemistry

2 answers:

Paraphin [41]1 year ago

8 0

The formula is NaHCO_3

If it is mixed with water or aqueous then it forms basic solvent.

Soda lime is a key reagent in purification of organic compounds.

Its basic
Its the mixture of NaOH and CaO

olganol [36]1 year ago

4 0

The aqueous of baking soda is basic.

\\ compound: sodium bicarbonate || NaHCO₃ \\

The aqueous solution of soda lime is basic.

\\ compound: CaHNaO₂ || sodium calcium hydrate \\

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The radioactivity due to carbon-14 measured in a piece of a wooden casket from an ancient burial site was found to produce 20 co

bekas [8.4K]

Answer:

17202.6 years

Explanation:

Activity of the living sample (Ao) = 160 counts per minute

Activity of the wood sample (A) = 20 counts per minute

Half life of carbon-14 = 5730 years

t= age of the artifact

From;

0.693/t1/2= 2.303/t log Ao/A

Then;

0.693/ 5730= 2.303/t log Ao/A

Substituting values;

0.693/5730= 2.303/t log (160/20)

Then we obtain;

1.209×10^-4 = 2.0798/t

t= 2.0798/1.209×10^-4

Thus;

t= 17202.6 years

Therefore the artifact is 17202.6 years old.

3 0

2 years ago

This graph shows the solution to the inequality y > 3x + 14 and y < 3x + 2

erik [133]

For apex the answer is no solution

7 0

2 years ago

Calculate the specific heat of the substance if 373 J is required to raise the temperature of a 312 gram sample by 25°C?

I am Lyosha [343]

Explanation:

Q = 373J

∆∅ = 25°C

m = 312g

c = x

Q = mc∆∅

373 = 312(x)(25)

373 = 7800x

x = 373/7800

x = 0.0478J/(g°C)

4 0

2 years ago

5. Location A is in the center of a large desert. What factor could account for its low annual

Anna11 [10]

Given what we know about the mechanisms surrounding weather, we can confirm that Large deserts receive less rainfall due to the lack of bodies of water and "rainshadows".

Rainshadow is a term used to describe the effects of nearby mountains on the rainfall amounts of a desert. The mountain causes the air to rise greatly and lose moisture. This moisture is received by the mountain, which means that it does not reach the desert area.

Another limiting factor for the amount of rainfall received by deserts is the lack of bodies of water in the area. Once a desert is formed, it tends to lack large bodies of water. This limits the rainfall it receives given that there is no water nearby to evaporate and cause the formation of clouds.

To learn more visit:

brainly.com/question/1051337?referrer=searchResults

4 0

2 years ago

How did the discovery of isotopes help to lead to a revised model of atomic structure?

Arte-miy333 [17]

Dalton postulated that atoms of the same elements had the same mass while atoms of different elements had different masses.

The discovery of isotopes revealed that atoms of the same element did not necessarily have same masses, they could have different masses.

Therefore, the modern periodic table that we use nowadays contains the average atomic mass of all the isotopes found for a given element.

8 0

3 years ago

Hello people ~help me with these questions ​

Hello people ~help me with these questions