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ss7ja [257]
2 years ago
12

A student has two objects. Object 1 has a mass of 28 g and a volume of 12 cubic

Chemistry
1 answer:
bearhunter [10]2 years ago
8 0

Answer:

Object 2 with a density of 0.68

Explanation:

object 2 has a lower density than water so it will float

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How many moles is 3.85 x 1025 atoms of gold?
stich3 [128]

Answer:

3.45 x 10^24 x 1 / 6.022 x 10^23 = 573 

4 0
2 years ago
a 4.18 g sample of a hydrocarbon is combusted in a bomb calorimeter that contains 974 g of water. the temperature of the water i
lys-0071 [83]

The heat of the reaction, in kJ, when 4.18 g of the hydrocarbon are combusted 775.70 kJ.

The heat energy is given as :

q = m c ΔT + Ccal ΔT

q = ( 974 g× 4.184 ×6.9) + 624 ×6.9

q = 32424.59 J

moles of hydrocarbon = 0.0418 mol

heat of combustion = 32424.59 J / 0.0418 mol

                                 = 775707.89 J

                                = 775.70 kJ

Thus, A 4.18 g sample of a hydrocarbon is combusted in a bomb calorimeter that contains 974 g of water. the temperature of the water increases by 6.9 °C when the hydrocarbon is combusted. the calorimeter constant for the calorimeter was determined to be 624 J/°C. what is the heat of the reaction is 775.70 kJ.

To learn more about calorimeter here

brainly.com/question/28943378

#SPJ4

5 0
1 year ago
Please help~~ thank you so much
deff fn [24]

Answer:

c. 2 and 3

Explanation:

Ca(NO3)2 names calcium nitrate.

Ca metal, O, N - nonmetals, so Ca(NO3)2 is ionic compound.

It is solid and white.

4 0
3 years ago
The rate of heat transfer by radiation is best described by which statement?
bogdanovich [222]

requires a medium to propagate

Explanation:

due to radiation z a dispersion of light ray into different multiple

7 0
3 years ago
Which way can heat never flow?
Elena L [17]
Which way can heat never flow?

The wrong answer is a,c,d

The correct answer is b. Cold to Hot
7 0
3 years ago
Read 2 more answers
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