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2 years ago

11

Why is soap so effective at killing microorganisms?

1 answer:

IceJOKER [234]2 years ago

4 0

Answer:

— Washing with soap and water is an effective way to destroy and dislodge many microbes

Explanation:

Soap actually kill germs on our hands, it breaks them up and removes them
.But soap molecules have two different ends to them.
One end is attracted to water molecules – this is called hydrophilic
– and the other end loves oil and fat molecules – this is called hydrophobic.
Soap is able to bind to the oils on our hands, and then mix with the water to wash all the germs away.

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What were the first 16 elements known in 1760

Len [333]

Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminum
Silicon
Phosphorus and
Sulfur

6 0

3 years ago

A liquid sample, with a density of .0915 g/mL has a mass of 17.7 grams.

Arlecino [84]

The relation between density, mass and volume is

$Density = \frac{Mass}{Volume}$

1) to calculate = volume

given:

Density = 0.0915 g/ mL

mass = 17.7 grams

formula used:

$Density = \frac{Mass}{Volume}$

Thus

Volume $Volume = \frac{Mass}{Density} = \frac{17.7 g}{0.915 \frac{g}{mL} } = 193.44 mL$

Answer: 193.44 mL

2) the mass of sample will be

$mass = density X volume = 0.0915\frac{g}{mL} X 76.5 mL = 6.99 = 7 g$

Answer: 7 g

5 0

3 years ago

A superconductor performs best at??

Charra [1.4K]

very cold temperatures

Explanation:

A superconductor performs best at very cold temperatures.

A superconductor is a perfect conductor that is able to allow the passage of electricity and heat without resistance.

In superconductors, under certain conditions, resistance ceases to exist.
Examples are aluminium, niobium e.t.c
A conductor allows heat and current to pass through but with little resistance.

learn more:

Metals brainly.com/question/2474874

#learnwithBrainly

4 0

3 years ago

Need help<br>no link<br><br><br><br>in how many days does the life cycle of mosquito complete?

Dmitrij [34]

Answer:

it can range from 4 days to as long as a month.

5 0

3 years ago

Read 2 more answers

A gas has a volume of 490. mL at a temperature of -35.0 degrees C. What volume would the gas occupy at 42.0 degrees Celsius? Ple

miskamm [114]

Answer:

648.5 mL

Explanation:

Here we will assume that the pressure of the gas is constant, since it is not given or specified.

Therefore, we can use Charle's law, which states that:

"For an ideal gas kept at constant pressure, the volume of the gas is proportional to its absolute temperature"

Mathematically:

$\frac{V}{T}=const.$

where

V is the volume of the gas

T is its absolute temperature

The equation can be rewritten as

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where in this problem we have:

$V_1=490 mL$ is the initial volume of the gas

$T_1=-35.0^{\circ} + 273 = 238 K$ is the initial temperature

$T_2=42.0^{\circ}+273=315 K$ is the final temperature

Solving for V2, we find the final volume of the gas:

$V_2=\frac{V_1 T_2}{T_1}=\frac{(490)(315)}{238}=648.5 mL$

8 0

4 years ago