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3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

2 answers:

6 0

well there is a certain margin error. If you rounded any number you will not get the right measurement. if you round up when multiplying you will get a larger number then the answer really is and Vise versa.

Misha Larkins [42]3 years ago

4 0

Answer:

See below

Step-by-step explanation:

Measurements

Every measurement must be reported with the correct number of significant figures.

A measurement can contain only one uncertain digit.

Calculations

The results calculated from a measurement are at least as uncertain as the measurement itself.

You must follow the correct significant figure rules for

addition and subtraction
multiplication and division.

You must follow the correct rules for rounding the results of your calculations.

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How many ml of concentrated hydrochloric acid would be required to make 1 L of a 0.2 M solution? Assume that concentrated hydroc

fgiga [73]

<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL

<u>Explanation:</u>

To calculate the volume of concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted solution

We are given:

Conversion factor: 1 L = 1000 mL

$M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL$

Putting values in above equation, we get:

$12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL$

Hence, the volume of concentrated hydrochloric acid required is 16.53 mL

3 0

3 years ago

What happens after you leave oil and vinegar in a glass for a few minutes?

MAVERICK [17]

Answer:

An emulsion is formed.

Explanation:

An association (emulsion) of two liquids is formed, in this case oil and vinegar, which when stirred, said mixture will separate.

3 0

3 years ago

Which of these processes removes carbon from

GenaCL600 [577]

Answer is c photosynthesis

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2 years ago

What mass of H2 is needed to react with 8.75 g of O2 according to the following equation: O2(g) + H2(g) → H2O(g)?

Alika [10]

Answer:- B: $1.10g H_2$ is the right answer.

Solution:- The balanced equation is:

$O_2(g)+2H_2(g)\rightarrow 2H_2O(g)$

We have been given with 8.75 grams of oxygen and asked to calculate the grams of hydrogen needed to react with given grams of oxygen according to the balanced equation.

From balanced equation, 1 mole of oxygen reacts with 2 moles of hydrogen.

So, let's convert grams of oxygen to moles and multiply it by the mole ratio to calculate the moles of hydrogen that are easily converted to grams on multiplying by it's molar mass.

The complete set up looks as:

$8.75g O_2(\frac{1mole}{32g})(\frac{2mole H_2}{1mole O_2})(\frac{2.02g}{1mole})$

= $1.10g H_2$

Hence, the right option is B: $1.10g H_2$ .

7 0

3 years ago

Read 2 more answers

What is the mass in grams of 6.022×1023 atoms of mass 16.00 amu?

skelet666 [1.2K]

You need the Avogadro's number. I can't remember exactly the calculation.

6 0

2 years ago