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Paraphin [41]
3 years ago
14

Determina la masa del compuesto CoS

Chemistry
1 answer:
Anuta_ua [19.1K]3 years ago
8 0
Co= 59g
S=32g
59+32=91g/mol
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Question 7
Aneli [31]
D =temperature of the water
4 0
3 years ago
A 35.0-ml sample of 1.00 m kbr and a 60.0-ml sample of 0.600 m kbr are mixed. the solution is then heated to evaporate water unt
Ugo [173]
The number of moles in the resulting solution can be calculated by adding together the number of moles from the individual solution. That is calculated as follows,
   
     total number of moles = (35 mL)(1 L/1000 mL)(1 mole/L) + (60 mL)(1 L/1000 mL)(0.6 moles / L) = 0.071 moles

The precipitation reaction is,

      KBr + AgNO3 --> AgBr + KNO3

From the equation, each mole of the KBr will need one mole of AgNO3. Hence, 0.071 mole of AgNO3 will also be needed. Calculating for the mass,
  
          mass of AgNO3 = (0.071 moles)(169.87 g / mol) = 12.06 g

ANSWER: 12.06 grams


4 0
3 years ago
Which state of matter is being described below?
ankoles [38]

Answer:

C. Gas

Explanation:

I think this is the right answer because it fits the description

8 0
2 years ago
During the combustion of a peanut that weighed 0.341 g, the temperature of the 100 mL of water in the calorimeter rose from 23.4
blondinia [14]

Answer:

119 kCal per serving.

Explanation:

The heat energy necessary to elevates water's temperature from 23.4°C to 37.9°C can be calculated by the equation below:

Q = mcΔT

Q: heat energy

m: mass in g

c: specific heat capacity in cal/g°C

ΔT = temperature variation in °C

m is the mass of water, considering the density of water to be 1g/mL, 100 mL of water weights  100g. Therefore:

Q = 100 g x 1.00 cal/g°C x (37.9 - 23.4)°C

Q = 1450 cal

1450 cal ____ 0.341 g peanuts

x             ____  28 g peanuts

x = 119061.58 cal

This means that the cal from fat per serving of peanuts is at least 119 kCal.

3 0
3 years ago
PLEASE HELP!! IM BEING TIMED
Ivan

Answer:

80 tricycle

Explanation:

Because u need 3 wheels to for each tricycle so Ll u have to do is just divide 3 with 240 u will get 80

4 0
3 years ago
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