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elena-s [515]
3 years ago
7

3. The speed of a reaction can be increased by increasing reactant concentration or decreasing

Chemistry
2 answers:
Sloan [31]3 years ago
5 0

Answer:

true

because with the both states we increase the surface of reaction

Ksivusya [100]3 years ago
4 0
It would probably be true
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Calculate each of the following quantities.<br> (a) mass in kilograms of 3.7 x 1020 molecules of NO2
HACTEHA [7]

Answer:

The answer to your question is:  0.028 kg of NO2

Explanation:

Data

3.7 x 10²⁰ molecules of NO2 in kg

MW of NO2 = 14 + (16 x 2) = 14 + 32 = 46 kg

                   1 mol of NO2 ---------------------  6.023 x 10 ²³ molecules

                   x                     --------------------- 3.7 x 10²⁰ molecules

                   x = 3.7 x 10²⁰ x 1 / 6.023 x 10 ²³

                   x = 0.00061 mol

         

                 1 mol of NO2 ---------------------  46 kg of NO2

                 0.00061 mol     ------------------    x

                 x = 0.00061 x 46/1

                x = 0.028 kg of NO2

7 0
3 years ago
How many grams of O are in 605 g of Na,O?
Elden [556K]

Answer:

2Na2O2+2H2O⟶O2+4NaOH

2×78g                           32g

156g of Na2O2 produces 32g of O2,

12g of Na2O2 produces =15632×12=10.66g.

Density of O2 at NTP=1.428g/mL.

DensityMass=Vol.

1.42810.66=7.46mL

Vol. of O2 at NTP is 7.46mL.

Explanation:

mark me as brainlist

6 0
2 years ago
What is different about most of the elements of the 7th period?
11Alexandr11 [23.1K]

Answer:

All elements of period 7 are radioactive. This period contains the actinides, which includes plutonium, the naturally occurring element with the heaviest nucleus; subsequent elements must be created artificially.

Explanation:

hope u understand :)

3 0
3 years ago
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What is the total number of atoms represented in the formula CuSO4*5H2O
Alenkinab [10]
There are 21 atoms represented in the formula :) hope this helped.
4 0
3 years ago
Define Physical and Chemical change
vlada-n [284]

Answer:

Explanation:

Chemical is when there is a change of color odor or temperature rises

7 0
3 years ago
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