## 7. Calculate moles of H2 needed to form 2.25 moles HCl in the reaction H2 + Cl2==>2HCl

7. Calculate moles of H2 needed to form 2.25 moles HCl in the reaction H2 + Cl2==>2HCl

## What mass of NaCrO2 can be obtained from the reaction of 7.40g Cr(OH)3 with 7.60g NaOH in the following reaction:

What mass of NaCrO2 can be obtained from the reaction of 7.40g Cr(OH)3 with 7.60g NaOH in the following reaction: CrOH3+NaOH==>NaCrO2+2H2O

## QUESTIONS A how does the ratio in calculation #4 Compare with stre catio oa etre Cooprecent a the same too

QUESTIONS A how does the ratio in calculation #4 Compare with stre catio oa etre Cooprecent a the same too aetate the balanced equation per te reaction Fe – Cusau Cu + Fesou​

## Match each fossil with the layer where it’ll be present based on these conditions: Dinosaurs existed before birds. Corals existed

Match each fossil with the layer where it’ll be present based on these conditions: Dinosaurs existed before birds. Corals existed between trilobites and amphibians. Trilobites are the oldest fossils. Dinosaurs are younger than amphibians. Birds are the youngest species to be observed in this stratum. Layer A is the top layer. corals trilobites dinosaurs birds amphibians layer A arrowRight layer B arrowRight layer C arrowRight layer D arrowRight layer E arrowRight

## What is the second quantum number of a 1s2 electron in phosphorus, 1s22s22p63s23p3?

What is the second quantum number of a 1s2 electron in phosphorus, 1s22s22p63s23p3?

## What type of chemical reaction absorves energy and requires energy for the reaction to occur? A)Endothermic B)Exothermic C)Synithis D)Both A

What type of chemical reaction absorves energy and requires energy for the reaction to occur? A)Endothermic B)Exothermic C)Synithis D)Both A and B​

## Diagonal relationship is present between the lighter elements of periods 1) Second, third 2) Second, fourth 3) Third, fourth 4) third, fifth

Diagonal relationship is present between the lighter elements of periods

1) Second, third 2) Second, fourth 3) Third, fourth
4) third, fifth

## Generally the ionization potential in a period increases, but there are some exceptions. The one which is not an exception

Generally the ionization potential in a period increases, but there are some exceptions. The one which is not an exception is

1) Be & B 2) N & O 3) Mg & Al 4) Na & Mg

## A) Write the word equation for a neutralisation reaction between an acid and an alkali.

a) Write the word equation for a neutralisation reaction between an acid and an alkali.

## What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type

What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force