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Daniel [21]
3 years ago
14

Please answer this correctly,,, This is a huge part of my grade. And who ever answers correctly will get brainliest!

Chemistry
2 answers:
chubhunter [2.5K]3 years ago
8 0

Answer:

I belive it's the black chair because they were asking which chair experienced the most force in the begining and the black chair had the most force given.

lisov135 [29]3 years ago
8 0
I will think is the black chair
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Which product forms from a reaction between beryllium (Be) and arsenic (As)?
Gekata [30.6K]

Answer:

Be3As2

Explanation:

8 0
2 years ago
How many grams of Mg(ClO3)2 are needed to make 1,500 mL of a 2.5 N solution ?​
yarga [219]

Answer:

33

Explanation:

3 0
2 years ago
When a student chemist transferred the metal to the calorimeter, some water splashed out of the calorimeter. will this technique
Natalka [10]

Answer:

It will be reported too low.

Explanation:

To measure the specific heat of the metal (s), the calorimeter may be used. In it, the metal will exchange heat with the water, and they will reach thermal equilibrium. Because it can be considered an isolated system (there're aren't dissipations) the total amount of heat (lost by metal + gained by water) must be 0.

Qmetal + Qwater = 0

Qmetal = -Qwater

The heat is the mass multiplied by the specific heat multiplied by the temperature change. If c is the specific heat of the water:

m_metal*s*ΔT_metal = - m_water *c*ΔT_water

s = -m_water *c*ΔT_water / m_metal*ΔT_metal

So, if m_water is now less than it was supposed to be, s will be reported too low, because they are directly proportional.

5 0
3 years ago
a piece of food is burned in a calorimeter that contains 200.0g of water. If the temperature of the water rose from 65.0°C to 83
Flauer [41]

Answer: 15062.4 Joules

Explanation:

The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of food = 200.0g

C = 4.184 j/g°C

Φ = (Final temperature - Initial temperature)

= 83.0°C - 65.0°C = 18°C

Then, Q = MCΦ

Q = 200.0g x 4.184 j/g°C x 18°C

Q = 15062.4 J

Thus, 15062.4 joules of heat energy was contained in the food.

4 0
3 years ago
How do i find the mole of something?
nikklg [1K]
To find the mole of a substance, you take the mass divided by the molar mass of that substance~
3 0
3 years ago
Read 2 more answers
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