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2 years ago

What is GMOs? ( Thanks btw )

Chemistry

1 answer:

Sunny_sXe [5.5K]2 years ago

5 0

Answer:

living organisms whose genetic material has been artificially manipulated in a laboratory through genetic engineering

Explanation:

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A chemist uses hot hydrogen gas to convert chromium(III) oxide to

Darya [45]

Answer: 3.024 g grams of hydrogen are needed to convert 76 grams of chromium(III) oxide, $Cr_{2}O_{3}$

Explanation:

The reaction equation for given reaction is as follows.

$Cr_{2}O_{3} + 3H_{2} \rightarrow 2Cr + 3H_{2}O$

Here, 1 mole of $Cr_{2}O_{3}$ reacts with 3 moles of $H_{2}$ .

As mass of chromium (III) oxide is given as 76 g and molar mass of chromium (III) oxide $(Cr_{2}O_{3})$ is 152 g/mol.

Number of moles is the mass of substance divided by its molar mass. So, moles of $Cr_{2}O_{3}$ is calculated as follows.

$No. of moles = \frac{mass}{molar mass}\\= \frac{76 g}{152 g/mol}\\= 0.5 mol$

Now, moles of $H_{2}$ .given by 0.5 mol of $Cr_{2}O_{3}$ is calculated as follows.

$0.5 mol Cr_{2}O_{3} \times \frac{3 mol H_{2}}{1 mol Cr_{2}O_{3}}\\= 1.5 mol H_{2}$

As molar mass of $H_{2}$ is 2.016 g/mol. Therefore, mass of $H_{2}$ is calculated as follows.

$No. of moles = \frac{mass}{molar mass}\\1.5 mol = \frac{mass}{2.016 g/mol}\\mass = 3.024 g$

Thus, we can conclude that 3.024 g grams of hydrogen are needed to convert 76 grams of chromium(III) oxide, $Cr_{2}O_{3}$ .

7 0

3 years ago

How much water would I need to add to 700 mL of a 2.7 M KCl solution to make a 1.0 M solution?

geniusboy [140]

Answer:

$1190\ \text{mL}$

Explanation:

$M_1$ = Initial Concentration of KCl = 2.7 M

$V_1$ = Volume of KCl = 1 M

$M_2$ = Final concentration of KCl = 1 M

$V_2$ = Amount of water

We have the relation

$M_1V_1=M_2V_2\\\Rightarrow V_2=\dfrac{M_1V_1}{M_2}\\\Rightarrow V_2=\dfrac{2.7\times 700}{1}\\\Rightarrow V_2=1890\ \text{mL}$

The amount of water that is to be added is $1890-700=1190\ \text{mL}$ .

3 0

2 years ago

How many amino acids are considered scientist to be “essential

grin007 [14]

Yo sup??

The answer to your question is option c ie

c.9

the rest 12 are under non essential as they are produced by our body itself

Hope this helps.

3 0

2 years ago

Spray drying_______________.a. converts solid foods to semi-solid foods b. atomizes liquids into small solid particles c. increa

Mamont248 [21]

Answer:

b. atomizes liquids into small solid particles

Explanation:

Spray drying -

It refers to the process of getting a dry powder from the liquid or the slurry ,with the help of hot gas , is referred to as spray drying .

The method is used in the field of pharmacy .

It is a type of atomizer or spray nozzle which helps to disperse the liquid into the controlled drop size spray .

Small solid particles are generated by this method .

Hence , from the given scenario of the question ,

The correct answer is b. atomizes liquids into small solid particles .

7 0

3 years ago

What is the negatively charged subatomic particle located outside the nucleus of an atom

Mars2501 [29]

The answer is electron

8 0

3 years ago

What is GMOs? ( Thanks btw )​

What is GMOs? ( Thanks btw )