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3 years ago

I NEED HELP ASAP!! DO IN A HOUR!! POEASE HELP!!A scientist views different objects using a light microscope. Which features

1 answer:

4 0

Different types of cells
Small organelle features
Smaller number of cells

I hope this helps, this would be my answer good luck!

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Which of the compounds in the table below is listed in the wrong colum?

Sveta_85 [38]

Answer: C

Explanation: This is because of a nice thing called guessing

5 0

3 years ago

A 59.1 sample of aluminum is put into a calorimeter (see sketch at right) that contains of water. The aluminum sample starts off

Gemiola [76]

Answer:

Specific heat capacity of aluminium is 0,863 J/g°C

Explanation:

Values: 250g of water, aluminum sample starts off at 91.3°C, water starts off at 16.0°C, temperature of the water stops changing it's 19.5°C

In this problem, the heat produced for the aluminium is the same consumed by water. The heat consumed by water is:

Q = C×m×ΔT (1)

Where C is specific heat of water (4,184J/g°C), m is mass of water (250,0g) and ΔT is change in temperature of water (19,5°C-16,0°C = 3,5°C)

Replacing:

Q = 4,184J/g°C×250,0g×3,5°C

Q = 3661 J

Using (1), it is possible to obtain specific heat of aluminium, thus:

Q / (m×ΔT) = C

Where Q is heat (3661J), m is mass (59,1g) and ΔT is change in temperature (91,3°C - 19,5°C( = 71,8°C

Replacing:

3661J / (59,1g×71,8°C) = C

C = 0,863 J/g°C

I hope it helps!

4 0

3 years ago

Metal cations are atoms that have a positive charge. What type of bond is metal cation likely to form?

Akimi4 [234]

Answer:

An ionic bond

Explanation:

An M⁺ cation will be attracted to an X⁻ anion.

The bond formed by a cation-anion attraction is an ionic bond.

4 0

3 years ago

Read 2 more answers

25 L of a gas is collected at 115 kPa. If the pressure increases to 300 kPa, what is the new volume?

Lina20 [59]

Answer:

V2 = 9.58 Litres.

Explanation:

Given the following data;

Initial volume = 25 L

Initial pressure = 115 kPa

Final pressure = 300 kPa

To find the new volume V2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

$PV = K$

$P_{1}V_{1} = P_{2}V_{2}$

Substituting into the equation, we have;

$115 * 25 = 300*V_{2}$

$2875 = 300*V_{2}$

$V_{2} = \frac {2875}{300}$

$V_{2} = 9.58$

V2 = 9.58 L

Therefore, the new volume is 9.58 litres.

5 0

3 years ago

Can a pillow have kinetic and potential energy explain how and why ?

romanna [79]

Answer:

Explanation:

because its fabric

6 0

3 years ago

Read 2 more answers