need helped for this

Answer:

Explanation:

f i did this in my class

Answer:

3 rd

Explanation:

yes answer is 3 you can go with it

Answer:

the answer is d.

1. Write the symbols for each element.

2. Find the charge for each element using the Periodic Table. Write it above each element. (because there is a (III) after nickel, the charge of nickel is +3. oxygen is in group 16, which means it has a -2 charge.)

3. See if the charges are balanced (if they are you're done!)

- when you criss cross (getting Ni2O3, the charges are canceled out, so the equation is balanced.

if you still need help or if this is confusing, look up How to Write the Formula for Nickel (III) oxide  by Wayne Breslyn on YT.

Answer:

D.) Ni2O3

Explanation:

edge 2021 (just needed the daily answer)

Answer:

Part 1: 229.95g

Part 2: 598.5g

Part 3: 12.6g

Explanation:

Note: I learned this last week. Answer not sure.

Pls tell me if i got it right or wrong.

Mg + HCl - > MgCl2 + H2

First, balance the equation.

There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.

Mg + 2HCl - > MgCl2 + H2

Formula 1: (n= m/mr)

n = moles, m= mass, mr = molecular mass

Formula 2: (n= v/24)

v = volume

Part 1

What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?

Ratio of

(look at the number in front of each)

2HCl : Mg

2 : 1

(3.15 x 2) : 3.15 moles

6.3 moles : 3.15 moles

So 2HCl has 6. 3 moles

Now use formula 1 (n = m/mr)

Calculate molecular mass of HCl

Check your periodic table

mr of HCl =(1 + 35.5) = 36.5

6.3 = m/36.5

m = 229. 95grams

Part 2

What mass of MgCl2 is produced? Answer in units of g.

Ratio of

2HCl : MgCl2

(1 +35.5) : (24+35.5x2)

36.5: 95

229.95g :?

229.95g : 598.5g

m = 598.5g

Part 3

What mass of H2 is produced? Answer in units of g.

2HCl : H2

36.5 : 2

229.95g :?

229.95g : 12.6g

m = 12.6g

Answer:

Neon is a gas and silicon is a solid i solved this for my chemistry teacher dr Thomas project this week

Explanation:

gasses are naturally less stable then non metalloids

Answer:

C. Transition metals

Explanation:

Out of the answers transition metals have the most elements on the periodic table.    

Answer:

C    shake it repeatedly

Explanation:

i think thats the answer if not sorry hope it helps you.

Answer:

C.

Explanation:

Answer:

this is my old account and these still dont have answers

Explanation:

Answer: equal to

Explanation:

Answer:

100

Explanation:

Fe = 26 (look on periodic table)

O = 16

(26×2) + (16×3) = 100

Answer:

this would be the .04 it is very simple

Explanation:

Answer:

it think like it kicks all the stuff away from the ground stuff, thats the best i can do sorry., im not a science person.

Explanation:

Answer: Hope it can help you :)

Explanation:

Answer:

V = 100 ml

Explanation:

P1V1 = P2V2

P1 = 2.0 atm

V1 = 200ml

P2 = 4.0 atm

V2 = ?

(2.0)(200) = (4.0)V2

400 = (4.0)V2

V2 = 100

The new pressure will be

1000 L

, rounded to one significant figure.

Explanation:

Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is

P

1

V

1

=

P

2

V

2

.

Given

V

1

=

200

mL

×

1

L

1000

mL

=

0.2 L

P

1

=

700 mmHg

V

2

=

100

mL

×

1

L

1000

mL

=

0.1 L

Unknown

P

2

Equation

P

1

V

1

=

P

2

V

2

Solution

Rearrange the equation to isolate

P

2

and solve.

P

2

=

P

1

V

1

V

2

P

2

=

(

700

mmHg

×

0.2

L

)

0.1

L

=

1400 L

, which must be rounded to

1000 L

because all of the measurements have only one significant figure

Answer:

It would be B

Explanation:

Answer:

Solarpannels? I honestly don't know I'm just trying to be helpful.

Answer:

no lo sé bb 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Answer:

the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

Answer:

What substance changed physically under all three condition? Copper Wire

What substance changed chemically under all three condition? Steel Wool

What evidence indicates a chemical reaction is occurring? New gases are produced; A phase change has occurred; A color change

Select the three answers that are examples of a chemical reaction. The mixing of an acid and base shows an increase in temperature; after baking bread there is a new odor or smell; when hair is bleached it changes to a lighter color

Which data supports this inference? Baking soda dissolving; A gas formed, creating bubbles

Which experiment best shows evidence of energy being released in a chemical reaction? Heat and light are given off when paper is burned

Which experiment likely resulted in the formation of a precipitate? Two solutions are mixed together and a yellow solid forms

The BEST evidence for a chemical reaction is the formation of a new substance.

Explanation:

2. When heat and light are being given off, energy is being released. Paper burning is a chemical reaction b/c when paper is burnt, it is a new substance and the act can't be undone.

3. When a yellow solid forms, that solid is the participate.

4. You will for sure have a chemical reaction if a new substance is created.

5. Copper wire changed physically b/c the copper wire can be returned to its original condition in all of these situations and no new substance was formed. Steel Wool changed chemically b/c it can't be returned to its original state under any condition and new substances were formed every time.

6. New substances formed indicate a chemical reaction. A color change also is an indication of a chemical reaction.

7. When a substance can't be turned into its original position or a new substance is produced, a chemical reaction occurred.

Answer: b

Explanation: 50% comes from one parent and 50% comes from the other

Answer:

I believe your answer is B. Experimental research may lead to understanding descriptive research.

Generally, experimental research is a trial and error method that tests the hypothesis of descriptive research. Descriptive research being the theoretical or studied characters of a topic.

Please let me know if I had this wrong, and I'll do some extra research for you.

Answer:

That would be codes unregonizable

Explanation:

Answer:

creo que es R no se puede ser

Answer:

306g

Explanation:

[tex]m=5.5*56=308g[/tex]

Answer:

307.45

Explanation:

atomic mass of iron is 55.9 grams

mass = atomic mass × number of moles

= 5.5 × 55.9

= 307.45

Answer:

Hello! Lithium is a Alkali metal, and is located on the left of the periodic table, right below Hydrogen (H), and right above Sodium (NA) .

Fluorine is located on the right of the table, next to Oxygen (O) and Neon (NE), and right above Chlorine (Cl).

Hope this helps !! :)