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Pachacha [2.7K]

3 years ago

7

What effect does heat have on a chemical reaction?

1 answer:

Advocard [28]3 years ago

5 0

Answer:

Particles can only react when they collide. If you heat a substance, the particles move faster and so collide more frequently. That will speed up the rate of reaction. ... The rate of reaction will probably have doubled for that increase in temperature - in other words, an increase of about 100%.

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Use your data to form hypothesis relating the amount of light to the rate of photosynthesis.

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Answer:

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2 years ago

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Which of the following shows the valency of 1?

Oliga [24]

$\huge \bf༆ Answer ༄$

The element having valency of 1 is ~

Sodium (Na)

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3 years ago

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Aluminum foil is often incorrectly termed tin foil. If the density of tin is 7.28g/cm³,what is the thickness of a piece of tin f

leonid [27]

Answer:

15.0 µm

Step-by-step explanation:

Density = mass/volume

D = m/V Multiply each side by V

DV = m Divide each side by D

V = m/D

Data:

m = 1.091 g

D = 7.28 g/cm³

l = 10.0 cm

w = 10.0 cm

Calculation:

<em>(a) Volume of foil </em>

V = 1.091 g × (1 cm³/7.28 g)

= 0.1499 cm³

(b) <em>Thickness of foil </em>

The foil is a rectangular solid.

V = lwh Divide each side by lw

h = V/(lw)

= 0.1499/(10 × 10)

= 1.50 × 10⁻³ cm Convert to millimetres

= 0.015 mm Convert to micrometres

= 15.0 µm

The foil is 15.0 µm thick.

4 0

3 years ago

A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L.

ANTONII [103]

Answer:

b

Explanation:

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3 years ago

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Boyles Law P1V1 = P2V2

arsen [322]

Answer:

A. The balloons will increase to twice their original volume.

Explanation:

Boyle's law states that the pressure exerted on a gas is inversely proportional to the volume occupied by the gas at constant temperature. That is:

P ∝ 1/V

P = k/V

PV = k (constant)

P = pressure, V = volume.

$P_1V_1=P_2V_2$

Let the initial pressure of the balloon be P, i.e. $P_1=P$ , initial volume be V, i.e. $V_1=V$ . The pressure is then halved, i.e. $P_2=\frac{P}{2}$

$P_1V_1=P_2V_2\\\\P*V=\frac{P}{2} *V_2\\\\V_2=\frac{2*P*V}{P}\\\\V_2=2V$

Therefore the balloon volume will increase to twice their original volume.

3 0

3 years ago