All categories

2 years ago

(04.02 LC) Based on the cell theory, which of the following is true?

Chemistry

1 answer:

prohojiy [21]2 years ago

4 0

Answer:

Explanation:

there are billions of cells in living things. We are made out of millions of cells

You might be interested in

I'll give brainless! no l!nks!!!

Nastasia [14]

Answer:

Maritime tropical air mass

Continental polar air mass

7 0

2 years ago

Identify the type of chemical bond that forms when potassium reacts with bromine to form a salt.

Sunny_sXe [5.5K]

2K + Br2 ===> 2KBr

It's very ionic. The transfer of 2 electrons from K to Br2 is nearly as complete as it can be.

3 0

3 years ago

If the density of a 45.0 cm3 block of wood is 0.65 g/ml what is the mass of the wood?

wlad13 [49]

Answer:

$\boxed {\tt mass=29.25 \ grams}$

Explanation:

The density formula is mass over volume.

$d=\frac{m}{v}$

Rearrange the formula for the mass, m. Multiply both sides of the formula by v.

$d*v=\frac{m}{v}*v$

$d*v=m$

Mass can be found by multiplying the density and volume. The density is 0.65 grams per milliliter and the volume is 45.0 cubic centimeters.

A cubic centimeter is equal to a milliliter.

Therefore, 45 cubic centimeters also equals 45 milliliters.

$d= 0.65 \ g/mL\\v= 45 \ mL$

Substitute the values into the formula.

$0.65 \ g/mL * 45 \ mL=m$

Multiply. Note the milliliters, or mL will cancel out.

$0.65 \ g * 45=m$

$29.25 \ g=m$

The mass of the wood is 29.25 grams.

5 0

3 years ago

How many molecules of ammonia are contained in 10.4 moles of ammonia, NH3?

Crank

Answer:

The answer is " $\bold{6.26 \times 10^{24} \ molecules \ NH_3}\\\\$ "

Explanation:

1-mole molecules as per Avogadro number $= 6.02 \times 10^{23} \ molecules\\\\$

1-mole $NH_3 \to 6.02 \times 10^{23} \ molecules\\\\$

$10.4 \ moles \ of \ \ NH_3 :$

$\to \frac{ 6.02 \times 10^{23} \ molecules }{ 1 \ mole\ NH_3} \times 10.4 \ mole \ NH_3\\\\ \to 6.02 \times 10^{23} \ molecules \times 10.4\\\\\to 62.608 \times 10^{23} \ molecules \\\\\to 6.26 \times 10^{24} \ molecules \ NH_3\\\\$

6 0

3 years ago

If a mineral sample contains 25.6 g of Scandium, how many atoms of Scandium are in the

lapo4ka [179]

Answer:

A. 0.569

Explanation:

5 0

2 years ago