All categories

3 years ago

Easy questions ha chemistry

Chemistry

2 answers:

zheka24 [161]3 years ago

8 0

Answer:

Explanation:

joja [24]3 years ago

3 0

Answer:

Explanation:

You might be interested in

Can yall plz help me it’s a huge major grade and i don’t know how to do this

fomenos

Answer:

1. 48 mols

2. 0.2 M

5. 1.25 L

Explanation:

Molarity= mols divided by liters

Hope this helps not sure about 3 and 4

3 0

3 years ago

What is the name of a number with a fixed value in a specific mathematical context?

Hunter-Best [27]

Answer:

constant

Explanation:

A constant is a number with a fixed value in a specific mathematical context

6 0

2 years ago

Read 2 more answers

Classify..use the periodic table to classify the elements potassium, bromine a d argon according to how likely their atoms lose

iren2701 [21]

Answer:

Classification will be Potassium, Bromine, and Argon

Explanation:

Potassium is more likely to lose electrons and form positive ion
Bromine actually gain electrons and forms negative ion
Argon does not lose or gain electrons

6 0

3 years ago

Photosynthesis is? (Single choice)

olganol [36]

Answer:

B. a chemical reactions that occurs in the chloroplast of a plant.

Explanation:

7 0

2 years ago

Read 2 more answers

What is the volume of a substance that has a density of 13.6 g/cm and a mass of 3.0 g?

MakcuM [25]

Answer:

$\boxed {\boxed {\sf v \approx 0.22 \ cm^3}}$

Explanation:

We are asked to find the volume of a substance.

We are given the density and the mass. The density of a substance is its mass per unit volume. The formula for calculating density is:

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

We know the density of the substance is 13.6 grams per cubic centimeter and the mass is 3.0 grams.

ρ= 13.6 g/cm³
m= 3.0 g

Substitute these values into the formula.

$13.6 \ g/cm^3= \frac{3.0 \ g }{v}$

We are solving for the volume, so we must isolate the variable v. First, cross multiply. Multiply the first numerator by the second denominator, then multiply the first denominator by the second numerator.

$\frac{13.6 \ g/cm^3}{1}= \frac{3.0 \ g }{v}$

$13.6 \ g/cm^3 *v =3.0 \ g *1$

Multiply on the right side of the equation.

$13.6 \ g/cm^3 *v =3.0 \ g$

The variable is being multiplied by 13.6 grams per cubic centimeters. The inverse operation of multiplication is division, so we divide both sides of the equation by 13.6 g/cm².

$\frac {13.6 \ g/cm^3 *v}{13.6 \ g/cm^3} =\frac{3.0 \ g }{13.6 \ g/cm^3}$

$v =\frac{3.0 \ g }{13.6 \ g/cm^3}$

The units of grams cancel.

$v =\frac{3.0 }{13.6 \ cm^3}$

$v= 0.2205882353 \ cm^3$

The original measurement of density has 3 significant figures and the measurement of mass has 2. Our answer must have the least number of sig figs, which is 2. For the number we found, that is the hundredth place. The 0 in the thousandth place tells us to leave the 2 in the hundredth place.

$v \approx 0.22 \ cm^3$

The volume of the substance is approximately <u>0.22 cubic centimeters.</u>

6 0

3 years ago