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Katena32 [7]
3 years ago
9

A number should be rounded up if

Chemistry
1 answer:
Vedmedyk [2.9K]3 years ago
6 0

Answer:

C.) The number after it is between 5 and 9

Explanation:

If the digit to the right is less than five, you must leave the digit you want to round to as it is.

But, if the digit to the right is greater than or equal to five, you must increase the value of the digit you're rounding to by one. And any remaining digits before the decimal point become zeros, and any that are after the decimal point are dropped.

Hope this helps you out! : )

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Difference between calcium sulfide and calcium sulfate.
const2013 [10]

Answer: Calcium sulfide is a chemical compound having formula CaS. While  Calcium sulfide is inorganic compound g fomlaCaSO4.

Explanation:

calcium sulfide is use in  preparation of  hydrogen sulfide, luminous pain and as a depilatory in cosmetics while  calcium sulfate is used as desiccant. calcium sulfides is  white material crystallizes in cubes like rock salt while calcium sulfate has three different crystalized forms known as hemihydrate (CaSO4⋅12H2O) , anhydrate (CaSO4) and as  gypsum (CaSO4⋅2H2O). hope this explanation will be helpful for you

5 0
3 years ago
PLEASE NO FAKE ANSWERS!! Chemistry!!! Please will give brainliest !! Show work
Drupady [299]

When 1 mole of Zn and 2 mole of O₂ reacts togethor, It will produce 1 mole of ZnO as O₂ is excess reagent and Zn will act as Limiting reagent and thus it limits the amount of product formed.

<h3>What is Limiting reagent ?</h3>

Limiting reagents are the substances that are completely consumed first in a chemical reaction.

Given ;

  • Amopunt of Zn : 1 mole
  • Amount of O₂ : 2 mole

Given equation ;

2Zn + O₂ --> 2ZnO

As according to given chemical equation,

2 moles Zn of reacts with 1 mole of O₂ to produce 2 moles of ZnO.

Therefore,

1 mole of Zn will require 0.5 mole of O₂.

But,

the given amount of O₂ is 2 mole which is excess

Hence,

Zn here will act as the Limiting reagent, According to which the amount of product formed will be decided.

Therefore,

If 2 mole Zn produces : 2 moles of ZnO (According to given balanced equation)

Thus,

1 mole of Zn will produce = 2/2 x 1

                                          = 1 mole of ZnO

Hence, When 1 mole of Zn and 2 mole of O₂ reacts togethor, It will produce 1 mole of ZnO as O₂ is excess reagent and Zn will act as Limiting reagent and thus it limits the amount of product formed.

Learn more about Limiting reagent here ;

brainly.com/question/11848702

#SPJ1

3 0
2 years ago
A liquid with weak intermolecular forces will
SCORPION-xisa [38]

Will be destroyed unless helped.
3 0
4 years ago
Select all that apply. Which of the following measurements have 1 significant figure?
GuDViN [60]
The Answer will be
A, B, and D

Not entirely sure though, comment if I'm wrong about this or delete this so no one else gets it wrong if it is
4 0
3 years ago
Read 2 more answers
4. There are 1.9 moles of Oxygen gas at a pressure of 3.50 atm, and the temperature is 65°C. What is the
bonufazy [111]

Answer:

15.06 L

Explanation:

Using the ideal gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information provided in this question,

P = 3.50 atm

n = 1.9 moles

V = ?

T = 65°C = 65 + 273 = 338K

Using PV = nRT

V = nRT/P

V = (1.9 × 0.0821 × 338) ÷ (3.5)

V = 52.725 ÷ 3.5

V = 15.06 L

4 0
3 years ago
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