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2 years ago

Science edpuzzle

Chemistry

1 answer:

beks73 [17]2 years ago

8 0

Answer:

the 3 in the middle

Explanation:

There are 5 signs of chemical changes these are odor change,color change, temperature change, production of gas and creation of precipitation.

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As a car moves, the engine converts energy. The system consists of: the car (including engine and fuel), Earth, and surface of t

katen-ka-za [31]

Answer:

I believe your answer will be 3--

As the fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and releasing energy. The energy is released as heat, and allows parts of the engine to move. The chemical energy is transformed into thermal energy.

Explanation:

Hope this helps you!!!

7 0

3 years ago

PLEASE HELP ASAP :)

Vinvika [58]

is night i will answer you in the morning

8 0

3 years ago

The value for ψ in root tissue was found to be -1.6 bars. If you place the root tissue in a 0.1 m solution of sucrose at 20°c in

Allisa [31]

Answer:

$\Psi=\Psi_s+\Psi_p\\$

$I=1;C=0.1;R=0.0831\\$

$T=20+273=293~C\\$

as beaker is open so

$\Psi_p=0\\$

$\Psi=\Psi_s\\\Psi=-2.43483$

As ψof solution is lower than the root tissue so water will move out of the root to the solution

Explanation:

8 0

4 years ago

Key words why a rusty nail is chemical

boyakko [2]

Becuase you can't change it back to the shiny nail that it was at first So so therefore its a chemical and chemicals can not be changed back into its regular state.

4 0

3 years ago

Suppose of barium acetate is dissolved in of a aqueous solution of ammonium sulfate. Calculate the final molarity of barium cati

ollegr [7]

Explanation:

Let us assume that the given data is as follows.

mass of barium acetate = 2.19 g

volume = 150 ml = 0.150 L (as 1 L = 1000 ml)

concentration of the aqueous solution = 0.10 M

Therefore, the reaction equation will be as follows.

$Ba(C_{2}H_{3}O_{2})_{2} \rightarrow Ba^{2+} + 2C_{2}H_{3}O^{-}_{2}$