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4 years ago

Write the formula for calcium chloride. Explain how you determined this formula

1 answer:

7 0

Calcium forms an ion with a positive 2 charge and chlorine forms an ion with a negative one charg, so the formula is <span>CaC<span>l2</span></span>

Group 1 metals and group 2 metals form positive ions by losing 1 and 2 electrons respectively. Non-metals in group 17 gain 1, group 16 gain 2 and group 15 gain 3. Elements which lose electrons form positive ions while elements that gain electrons form negative ions.

To write a formula, you must balance charges so the overall charge is zero. A simple way to do this is to swap the # of the ion's charge and make it the subscript of the other ion. However, leave off the number 1 and reduce to lowest whole number ratio.

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2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O

Gnom [1K]

<u>Answer:</u> 0.5 moles of $N_2$ are produced in the reaction

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of $CuO$ = 113.6 g

Molar mass of $CuO$ = 79.5 g/mol

Plugging values in equation 1:

$\text{Moles of CuO}=\frac{113.6g}{79.5g/mol}=1.43 mol$

For the given chemical reaction:

$2NH_3+3CuO\rightarrow 3Cu+N_2+3H_2O$

By the stoichiometry of the reaction:

If 3 moles of $CuO$ produces 1 mole of $N_2$

So, 1.43 moles of $CuO$ will produce = $\frac{1}{3}\times 1.43=0.476=0.5mol$ of $N_2$

Hence, 0.5 moles of $N_2$ are produced in the reaction

5 0

3 years ago

What does the hydrolysis of atp do in a ca2+ pump or na+/k+ pump?

34kurt

Hydrolysis of ATP provides the energy that is needed to drive the electrolytes pumps. Energy is needed for these pumps to function because they are active form of transportation which the body use to move electrolytes from one point in the body to the other.

6 0

4 years ago

A heat releasing process.

Alisiya [41]

This reaction is called an exothermic reaction.

8 0

4 years ago

Determine the hybrid orbital of this molecule.

Pavel [41]

The hybrid orbital of this molecule is $sp^3$ . Hence, option C is correct.

<h3>What is hybridisation?</h3>

Hybridization is defined as the concept of mixing two atomic orbitals to give rise to a new type of hybridized orbitals.

In this compound, $sp^3$ a hybrid orbital makes I-O bonds. Due to $sp^3$ hybridization iodate should have tetrahedral geometry but because of the presence of lone pair of electrons the shape of $IO^{3-}$ the ion is pyramidal.

The hybrid orbital of this molecule is $sp^3$ . Hence, option C is correct.

Learn more about hybridisation here:

brainly.com/question/23038117

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7 0

2 years ago

1. When an acid reacts with a base, what compounds are formed? (1 point) a salt only water only metal oxides only a salt and wat

scoundrel [369]

Answer: 1) only a salt and water

An acid and base reacts together to undergo neutralization to form salt and water.

$HCl+NaOH\rightarrow NaCl+H_2O$

where HCl is an acid and NaOH is a base to form salt (NaCl) and water $(H_2O)$ .

Answer: 2) The formula of the hydrogen ion is often written as $H^+$ .

All acids dissociate in water to give $H^+$ ions.

Answer: 3) Arrhenius acids are substances that ionizes to yield protons in aqueous solution.

$HCl\rightarrow H^++Cl^-$

Arrhenius bases are substance that ionizes to yield hydroxide ions in aqueous solution.

$NaOH\rightarrow Na^++OH^-$

Answer: 4) A conjugate acid base pair transfers hydrogen ion.

$CH_3COO^-+H_2O\rightarrow CH_3COOH+H_3O^+$

Here $CH_3COO^-$ accepts a proton and thus act as a base and the corresponding $CH_3COOH$ is its conjugate acid.

Answer: 5) Bronsted Lowry acid is a substance that donates protons. Bronsted Lowry base is a substance that accepts protons.

$NH_4^+$ and $NH_3$

$NH_3+H^+\rightarrow NH_4^+$

$NH_3$ is a acid which accepts proton and thus acts as base to form conjugate acid $NH_4^+$ .

4 0

3 years ago

Read 2 more answers