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lianna [129]
2 years ago
13

Cell are the blank unit of all living organisms​

Chemistry
1 answer:
leonid [27]2 years ago
4 0
Yes cells are the blank unit for all things that are living
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What is the voltage across a 100 ohm circuit element that draws a current of 1 A?
andrey2020 [161]

Answer:

8) 45 volt

9) 8 ohms

100 volt

Explanation:

using ohms law all through

  • V=IR

8) v = 3×15

9) R= 120/15

the last V=100×1

7 0
3 years ago
A 76.0-gram piece of metal at 96.0 °C is placed in 120.0 g of water in a calorimeter at 24.5 °C. The final temperature in the ca
anygoal [31]

Answer:

S(metal) = 0.66J/g°C

Explanation:

We can find specific heat of a material, S, using the equation:

q = m*S*ΔT

<em>Where q is change in heat, m is the mass of the substance, S specific heat and ΔT change in temperature.</em>

The heat given by the metal is equal to the heat that water absorbs, that is:

m(Metal)*S(metal)*ΔT(Metal) = m(Water)*S(water)*ΔT(water)

<em>Where:</em>

m(Metal) = 76.0g

S(metal) = ?

ΔT(Metal) = 96.0°C-31.0°C = 65.0°C

m(Water) = 120.0g

S(water) = 4.184J/g°C

ΔT(water) = 31.0°C-24.5°C = 6.5°C

Replacing:

76.0g*S(metal)*65.0°C = 120.0g*4.184J/g°C*6.5°C

S(metal) = 0.66J/g°C

<em />

The law of conservation applies because the energy is not been created or destroyed. The energy that the metal gives is absorbed by the water.

3 0
3 years ago
Which of the following is used in pencils?
Mamont248 [21]

Answer:

1st answer:  A. Graphite

2nd answer:  B.  Mercury

Explanation:

3 0
3 years ago
Read 2 more answers
If 50.75 g of a gas occupies 10.0 L at STP, 129.3 g of the gas will occupy __________ L at STP.
Vlad [161]

If 50.75 g of a gas occupies 10.0 L at STP, 129.3 g of the gas will occupy 25.48 L at STP.

<h3>How to calculate volume?</h3>

The volume of a gas at STP can be calculated using the direct proportion method.

According to this question, 50.75 g of a gas occupies 10.0 L at STP, then 129.3g of the same gas will occupy the following:

= 129.3 × 10/50.75

= 25.48L

Therefore, if 50.75 g of a gas occupies 10.0 L at STP, 129.3 g of the gas will occupy 25.48 L at STP.

Learn more about volume at: brainly.com/question/12357202

#SPJ1

6 0
2 years ago
NEED HELP!!!
Mekhanik [1.2K]

Answer:

b. The shorter the half-life, the more dangerous the radioisotope.

8 0
3 years ago
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