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3 years ago

I'll mark you the brainiest if you answer this question first!!!

Chemistry

1 answer:

rewona [7]3 years ago

8 0

Answer:

Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.

Explanation:

Hope this help

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What is the empirical formula for a compound that has 1. 5 moles of copper and 0. 5 moles of phosphorus

astraxan [27]

The empirical formula for a compound that has
1.5 moles of copper and 0.5 moles of
phosphorus is CuP.

6 0

2 years ago

PLEASE ANSWER IF YOU KNOW

Lerok [7]

Answer:

The tundra!

Explanation:

It is the only biome that has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou!

Hope this helps!

3 0

3 years ago

To be able to see a measurable effect, your boiling point elevation must be at least 1.00°C. Knowing that the Kb of water is 0.

ale4655 [162]

Answer : The mass of calcium chloride (in g) needed is, 1.92 grams.

Explanation : Given,

Boiling point of elevation constant $(K_b)$ for water = $0.512^oC/m$

Mass of water (solvent) = $Density\times Volume=1.00g/mL\times 26.63mL=26.63g=0.02663kg$

Molar mass of $CaCl_2$ = 110.98 g/mole

Formula used :

$\Delta T_b=i\times K_b\times m\\\\\Delta T_b=i\times K_b\times\frac{\text{Mass of }CaCl_2}{\text{Molar mass of }CaCl_2\times \text{Mass of water in kg}}$

where,

$\Delta T_b$ = change in boiling point = $1.00^oC$

i = Van't Hoff factor = 3 (for electrolyte)

$K_b$ = boiling point constant for water

m = molality

Now put all the given values in this formula, we get

$1.00^oC=3\times (0.512^oC/m)\times \frac{\text{Mass of }CaCl_2}{110.98g/mol\times 0.02663kg}$

$\text{Mass of }CaCl_2=1.92g$

Therefore, the mass of calcium chloride (in g) needed is, 1.92 grams.

4 0

3 years ago

What is the density of a 6.0 × 102 mL liquid sample that weighs 450 g?

mart [117]

Answer:

<h2>Density = 0.75 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

$Density = \frac{mass}{volume}$

From the question

mass = 450 g

volume = 6.0 × 10² mL

Substitute the values into the above formula and solve for the density

That's

$Density = \frac{450}{6 \times {10}^{2} } = \frac{450}{6 00} \\ = \frac{3}{4}$

We have the final answer as

<h3>Density = 0.75 g/mL</h3>

Hope this helps you

8 0

3 years ago

What is the best Explanation for why a cell might shrivel

vova2212 [387]

It means that <span>the cell loses most of its water from osmosis when put in a hypertonic.

Hope that helps!</span>

3 0

3 years ago