All categories

3 years ago

Which word is in the same word family as manipulate?

Chemistry

1 answer:

STALIN [3.7K]3 years ago

8 0

Answer:

i believe it is clarify

Explanation:

hope this helped

You might be interested in

2. How does the way elements are grouped in the periodic table serve as an advantage to scientists?

Goryan [66]

When looking down the groups the elements have an equal number of electrons in the outer shell. This means they react in a similar way making it easier for scientists to use.

6 0

4 years ago

How many moles of carbon dioxide are produced when 5.12 moles of glucose undergoes a combustion reaction?

SVEN [57.7K]

Answer: 30.72 moles of $CO_2$ will be produced from 5.12 moles of glucose.

Explanation:

The balanced chemical equation for combustion of glucose is:

$C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O$

According to stoichiometry :

1 moles of glucose produce = 6 moles of $CO_2$

Thus 5.12 moles of glucose produce = $\frac{6}{1}\times 5.12=30.72moles$ of $CO_2$

Thus 30.72 moles of $CO_2$ will be produced from 5.12 moles of glucose.

8 0

3 years ago

An atom has an atomic number of 19 and mass number of 39 how many electrons and protons does it have?

LuckyWell [14K]

Answer:

19 protons, 20 neutrons and 18 electrons.

Explanation:

The atomic number gives the number of protons 19

p = 19

The atomic mass is the sum of the protons and neutrons

p + n = 39 p = 19

put p into the equation and solve for n the neutrons.

19 + n = 39

Subtract 19 from both sides

19 − 19 + n = 39 − 19

n = 20

The number of electrons equals the number of protons in a neutral atom. The positive charge equals the negative charge. The negative charge is the number of electrons. This ion has a charge of +1. So solve for the negative charge.

− 19 + 1 = − 18

The negative charge is -18 so

e = 18

5 0

4 years ago

Britney added 0.05 moles of copper(II) nitrate solution to 0.1 moles of sodium hydroxide solution and

Rama09 [41]

The percent yield of copper hydroxide is 84%

<h3>Stoichiometry</h3>

From the question, we are to determine the percent yield of copper hydroxide

First, we will determine the theoretical mass

From the given balanced chemical equation, we have

Cu(NO₃)₂ + 2NaOH -- Cu(OH)₂ + 2NaNO₃

This means,

1 mole of copper(II) nitrate reacts with 2 moles of sodium hydroxide to produce 1 mole of copper hydroxide

Therefore,
0.05 mole of copper(II) nitrate reacts with 0.1 mole of sodium hydroxide to produce 0.05 mole of copper hydroxide

The theoretical number of moles of copper hydroxide that is produced is 0.05 mole

Now, for the theoretical mass

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of copper hydroxide = 97.56 g/mol

Then,

Theoretical mass = 0.05 × 97.56

Theoretical mass of copper of hydroxide produced is = 4.878 g

Now, for the percent yield of copper hydroxide

Percent yield is given by the formula,

$Percent\ yield = \frac{Actual\ yield}{Theoretical\ yield} \times 100\%$

Then,

$Percent\ yield\ of\ copper\ hydroxide= \frac{4.1}{4.878}\times 100\%$

$Percent\ yield\ of\ copper\ hydroxide= 84\%$

Hence, the percent yield of copper hydroxide is 84%.

Learn more on Stoichiometry here: brainly.com/question/9372758

7 0

3 years ago

What’s the difference between chemically formed limestone and organic limestone

tatyana61 [14]

Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO 3) than the organic is a sedimentary rock composed largely of the minerals calcite and araganite.

4 0

3 years ago