40.0mL(1 L/1000 mL) = 0.040 L

then plug into the formula M = moles/liters 

0.035 M = moles/ 0.040L 

multipy both sides by 0.040L, and you get 0.0014 moles 

so the answer is 1

4 0

3 years ago

List the three requirements for a correctly written chemical equation.2. Give one example of a word equation, one example of a f

erma4kov [3.2K]

Answer:

Requirements for a correctly written chemical equation are reactants and products, their formula and valency

Explanation:

Formula of the given compound are -

1 - Potassium Hydroxide - $KOH$

2 - Calcium Nitrate - $Ca(NO_3)_2$

The requirements for a correctly written chemical equation are -

Identifying reactants and products
Formula of reactants and products
Valency of elements

Example of word equation, formula equation, and chemical equation is as follows -

Aluminium + iron9(III)oxide ⇒ aluminium oxide + iron (word equation)

$Al_(_s_)$ + $Fe_2O_3_(_s_)$ ⇒ $Al_2O_3_(_s_)$ + $Fe_(s)$ (formula equation)

$2Al_(_s_)$ + $Fe_2O_3_(_s_)$ ⇒ $Al_2O_3_(_s_)$ + $2Fe_(_s_)$ (chemical equation)

8 0

2 years ago

Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence elec

lapo4ka [179]

It's 1 because there is only one electron on the outer shell.

8 0

2 years ago

Read 2 more answers

1. Oxygen full electron configuration

Arada [10]

Answer:

$1s^{2} 2s^{2} 2p^{4}$

Explanation:

Oxygen has eight eletrons and six valence electrons, giving it the electron configuration of $1s^{2} 2s^{2} 2p^{4}$ .

7 0

2 years ago