All categories

2 years ago

I need help filling out this table, please help ASAP

Chemistry

2 answers:

aleksandr82 [10.1K]2 years ago

6 0

Answer:

A-20 B-40 C-Ca D-10 E-9 F-F

Dovator [93]2 years ago

3 0

Explanation:

<h2>----------------------------------------------</h2><h2>atomic number= no.of protons</h2><h2>and </h2>

<h2>mass no.= no. of protons+no. of neutrons</h2><h2>__________________________</h2><h2><em>A</em><em>=</em><em> </em><em>2</em><em>0</em></h2><h2><em>B</em><em>=</em><em> </em><em>4</em><em>0</em></h2><h2><em>C=</em><em> </em><em>ca</em></h2><h2><em>D</em><em>=</em><em> </em><em>1</em><em>0</em></h2><h2><em>E</em><em>=</em><em> </em><em>9</em></h2><h2><em>F</em><em>=</em><em>F</em></h2>

You might be interested in

Vhat are some of the benefits and drawbacks of recycling?

Eva8 [605]

Answer:

benefits: can help reduce waste in land fills, and promotes reusability (turned into different products)

drawbacks: can be much more expensive to salvage than to just throw it in a landfill, and most of the time products cannot be recycled effectively due to its material.

5 0

3 years ago

What particle decay is this? 210 83 Bi→210 84 Po

sesenic [268]

Answer:

Beta emission

Explanation:

In beta emission, a neutron is converted into a proton thereby emitting an electron and a neutrino. A neutrino is a particle that serves to balance the spins.

When a nucleus undergoes beta emission, the mass number of the parent and daughter nuclei remain the same while the atomic number of the daughter nucleus is greater than that of its parent by one unit.

Hence, in beta emission, the daughter nucleus is found one pace to the right of the parent in the periodic table.

3 0

3 years ago

10. What are the reactants in the process described below?

masha68 [24]

Answer:

don't know what to do

Explanation:

i don't know the answer

5 0

2 years ago

Which is a physical characteristic of a fish?

Nitella [24]

Answer:

Gill's

Explanation:

Fish's have many characteristics that differ from humans, and one of them is the gills.

3 0

3 years ago

Magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of HCl are combined and react to c

jok3333 [9.3K]

Answer:

2.24 L of hydrogen gas, measured at STP, are produced.

Explanation:

Given, Moles of magnesium metal, $Mg$ = 0.100 mol

Moles of hydrochloric acid, $HCl$ = 0.500 mol

According to the reaction shown below:-

$Mg_{(s)} + 2HCl_{(aq)}\rightarrow MgCl_2_{(aq)} + H_2_{(g)}$

1 mole of Mg reacts with 2 moles of $HCl$

0.100 mol of Mg reacts with 2*0.100 mol of $HCl$

Moles of $HCl$ must react = 0.200 mol

Available moles of $HCl$ = 0.500 moles

Limiting reagent is the one which is present in small amount. Thus, $Mg$ is limiting reagent.

The formation of the product is governed by the limiting reagent. So,

1 mole of $Mg$ on reaction forms 1 mole of $H_2$

0.100 mole of $Mg$ on reaction forms 0.100 mole of $H_2$

Mole of $H_2$ = 0.100 mol

At STP,

Pressure = 1 atm

Temperature = 273.15 K

Volume = ?

Using ideal gas equation as:

$PV=nRT$

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

1 atm × V L = 0.100 × 0.0821 L.atm/K.mol × 273.15 K

2.24 L of hydrogen gas, measured at STP, are produced.

4 0

3 years ago