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Molodets [167]
3 years ago
6

A catalyst is: one answer only pls help lol

Chemistry
2 answers:
lora16 [44]3 years ago
8 0

Answer:

the second one

Explanation:

it makes the most sense

natka813 [3]3 years ago
3 0
A catalyst is a substance that speeds up a chemical reaction.
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What happens to the temperature and density of the material between points B and C?
makvit [3.9K]

Answer:

Temperature decreases and density increases

Explanation:

Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.

Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.

7 0
3 years ago
How many molecules are there in 21.4 grams of Ca(OH)2?
nata0808 [166]

The answer would be 0.288827452320528

4 0
2 years ago
A person tries to heat up her bath water by adding 5.0 l of water at 80c to 60 l of water at 30c. what is the final temperature
Sophie [7]
We can calculate the final temperature from this formula :

when Tf = (V1* T1) +(V2* T2) / (V1+ V2)

when V1 is the first volume of water = 5 L 

and V2 is the second  volume of water = 60 L

and T1 is the first temperature of water in Kelvin = 80 °C +273 = 353 K

and T2 is the second temperature of water in Kelvin =  30°C + 273= 303 K

and Tf is the final temperature of water in Kelvin 

so, by substitution:

Tf = (5 L * 353 K ) + ( 60 L * 303 K) / ( 5 L + 60 L)

     = 1765 + 18180 / 65 L

     = 306 K
     = 306 -273 = 33° C

8 0
2 years ago
Methane is a major component of natural gas, which is used as a fuel in homes. write a balanced equation for the complete oxidat
Likurg_2 [28]
CH4 +2 O2 ----> CO2 +2H2O
8 0
3 years ago
CH3COOH + ...... -> (CH3COO)2Ba + H2O
julia-pushkina [17]

Answer:

CH3COOH Ba OH 2 Ba CH3COO 2 H2O?

Explanation:

hope it helps you ~♥~

5 0
2 years ago
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