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3 years ago

PLEASE HELP!! 50 POINTS!

Chemistry

1 answer:

Shalnov [3]3 years ago

3 0

Answer:

Ba^2+ (aq) +SO4^2- (aq) →BaSO4(s)

Explanation:

you really need to learn how to do this yourself - its really important throughout level chem, pre-ap chem, and especially if you plan on moving on to ap chem!!

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Al+Mn2+>Al3++Mn. How many electrons will be lost in all?

Alisiya [41]

It is probably 6 just divide

5 0

4 years ago

Riya rides his bike 63 miles in 270 minutes. What is his average speed in miles per hour? Be sure to include the equation for sp

antoniya [11.8K]

Time t=270 minutes=270/60=9/2 hours
distance s=63 miles
average speed v=s/t=63 ÷ $\frac{9}{2}$
=63× $\frac{2}{9}$
=14 miles/hour

6 0

3 years ago

Consider some unknown compound containing only copper and oxygen. In order to determine the empirical formula, a sample of the c

Lina20 [59]

The number of mole of copper in the sample is 0.008 mole.

Mole is simply defined as the unit of amount in a substance.

The mole of a substance can be obtained by dividing the mass of the subtance by its molar mass i.e

Mole = mass / molar mass

With the above information, we can obtain the mole of copper in the compound as follow:

Mass of copper = 0.5066 g

Molar mass of copper = 63.5 g/mol

<h3>Mole of copper =? </h3>

Mole = mass / molar mass

Mole of copper = 0.5066 / 63.5

<h3>Mole of copper = 0.008 mole </h3>

Therefore, 0.008 mole of copper was initially present in the compound.

Learn more: brainly.com/question/14295066

5 0

3 years ago

Which pair of properties describes the elements in Group 18?

olga55 [171]

Answer

-12

Explanation:

Cs 22 is not close to -12

6 0

4 years ago

Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg(OH)2). What products will be released

Lunna [17]

Answer: d) $MgCl_2$ and $H_2O$ 

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

A neutralization reaction is a double displacement reaction in which an acid reacts with base to produce salt and water. The $H^+$ ions from water reacts with $OH^-$ ions from base to give water.

$2HCl+Mg(OH)_2\rightarrow MgCl_2+2H_2O$

Thus products that will be released when the antacid is mixed with the hydrochloric acid in the stomach are $MgCl_2$ and $H_2O$ 

3 0

3 years ago