2 years ago

1 point

Chemistry

1 answer:

Dafna1 [17]2 years ago

4 0

I’m pretty sure it’s true :))!!

You might be interested in

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/

lara31 [8.8K]

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

2.67%

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

You are calculating weight /Volume not weight/weight % or percent by mass of the solute

Here the weight/weight % or percent by mass of the solute is asked : So first convert the VOLUME OF SOLUTION into MASS

Density of potassium nitrate in water KNO3 = 2.11 g/mL

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

Density = 2.11 g/mL

Volume of solution = 86.4 mL

$2.11=\frac{mass}{86.4}$

$mass = 2.11\times 86.4$

$mass=182.3grams$

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

$= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100$

$=\frac{4.87}{183.2}\times 100$

w/w%=2.67%

8 0

3 years ago

When an acid mixes with a bases it is called a combination reaction? true false

guajiro [1.7K]

False it is actually called a neutralization reaction.

5 0

2 years ago

DNA replication results in two identical DNA molecules. What role do DNA helicases have in DNA replication?

PilotLPTM [1.2K]

I'm pretty sure since one chemical can only bind with one other type, um, I think that one side of the DNA helicase helps make the other side?

8 0

3 years ago

Read 2 more answers

Slow cooling of magma leads to the formation of large crystals, such as halite and calcite.

mihalych1998 [28]

False h they gg be DVD BBC do Ed C rhh h do B try egg cut of C the

4 0

2 years ago

A 56.8g sample of aluminum is heated from 79.5°C to 143.7°C. The specific heat capacity of aluminum is 0.900 J/(g*K). Calculate

Mashutka [201]

Answer:

I think the answer is A.

4 0

3 years ago