Mixtures can be separated by filtration and distillation. Both methods take advantage of ...

Does electricity flow from negative to positive right

kirill [66]

Two types of charges are involved in electricity flow, these are positive charges and negative charges. The negative charges are called electrons and they are the ones that are responsible for electricity flow. The negative terminal of a battery for example has excess of electrons while the positive terminal lacks electrons. Thus, electricity flows by the movement of electrons from the negative terminal to the positive terminal.

4 0

3 years ago

Read 2 more answers

Help I really need to understand this please show how you do it !!

maks197457 [2]

Answer:

HCl

Explanation:

A limiting reactant is the lowest amount of reactant so that the reaction will stop after all that reactant used.

To answer this question, you have to change all reactant units into moles. You have 52g HCl and its molecular mass is 36.46g/mole. The number of HCl in moles will be: 52g/ (36.46g/mole)= 1.43 moles.

In the balanced reaction formula, you can see that you need one mole of HCl and one mole of NaOH for each reaction. Both molecule's coefficient is 1.

If we used up all NaOH, then the number of HCl left will be:

(moles of NaOH used * NaOH coefficient) - (moles of HCl used * HCl coefficient)

(moles of HCl you have * HCl coefficient) - (moles of NaOH used * NaOH coefficient)

(1.43 moles *1 ) - (2.5 moles*1 ) = -1.07 mole

Since the result is minus, then it means we need more HCl and we can't use all NaOH.

If we used up all the HCl, then the number of NaOH left will be:

(moles of NaOH you have* NaOH coefficient) - (moles of HCl used * HCl coefficient)

(2.5 moles*1 )- (1.43 moles *1 )= 1.07 moles

Since the result is plus, then it means we can use all HCl. Then HCl is the limiting reactant

4 0

3 years ago

A 3.00g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of

andrew-mc [135]

Answer: The molecular formula for the given organic compound X is $C_6H_{8}O_7$

Explanation:

We are given:

Mass of $CO_2=4.13g$

Mass of $H_2O=1.13g$

We know that:

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 4.13 g of carbon dioxide, = $\frac{12}{44}\times 4.13=1.13g$ of carbon will be contained.

For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

So, in 1.13 g of water, $\frac{2}{18}\times 1.13=0.125g$ of hydrogen will be contained.

Mass of oxygen in the compound = (3.00) - (1.13+ 0.125) = 1.75 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Carbon = $\frac{\text{Given mass of Carbon}}{\text{Molar mass of Carbon}}=\frac{1.13g}{12g/mole}=0.094moles$

Moles of Hydrogen = $\frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{0.125g}{1g/mole}=0.125moles$

Moles of Oxygen = $\frac{\text{Given mass of oxygen}}{\text{Molar mass of oxygen}}=\frac{1.75g}{16g/mole}=0.109moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles

For Carbon = $\frac{0.094}{0.094}=1$

For Hydrogen = $\frac{0.125}{0.094}=1.33$

For Oxygen = $\frac{0.109}{0.094}=1.16$

Step 3: Taking the mole ratio as their subscripts.

The ratio of C : H : O = 1: 1.33: 1.16

Converting them into whole number ratios by multiplying by 6:

The ratio of C : H : O = 6: 8: 7

Hence, the empirical formula for the given compound is $C_6H_8O_7$

Empirical mass = $6\times 12+8\times 1+7\times 16=192g$

The equation used to calculate the valency is :

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

Putting values in above equation, we get:

$n=\frac{192g/mol}{192g/mol}=1$

Multiplying this valency by the subscript of every element of empirical formula, we get:

$C_6H_8O_7\times 1=C_6H_{8}O_7$

Thus molecular formula for the given organic compound X is $C_6H_{8}O_7$

7 0

3 years ago

_ is the process in which an element spontaneously transforms into another isotope of the same element, or into a different elem

MariettaO [177]

Answer:

Nuclear transmutation

Explanation:

The process in which an element spontaneously transforms into another isotope of the same element, or into a different element is called nuclear transumutation. It occurs when the number of protons or neutrons in the nucleus of an atom is changed.

8 0

3 years ago

Substance B was heated at first gently and then more strongly in a bunsen flame. Two gases were given off, one of them brown. A

Illusion [34]

lolllllllllllllllllllllll

8 0

3 years ago