Please help me thank you

Answer:

lost 2 electrons

Explanation:

A cation by definition is a positively charged ion. They are formed when a metal loses its electrons. A cation has more protons than electrons, giving it a net positive charge. So, it had to have lost 2 electrons to give it a positive charge of 2⁺.

Answer:

Since hydrogen has a single electron in its valence shell, it exhibits dual nature. of the periodic table, or it can obtain one electron to complete its valency of two, such as halogens from Group 17. Since it only has one electron in its outer shell, hydrogen has a dual existence.

Explanation:

This means that, like a normal halogen, a hydrogen atom can easily gain an electron to form a complete outer shell, or lose an electron to form an alkali metal. Since it already has two electrons in its outer shell, hydrogen can be diatomic, rendering it unreactive.

Answer:

Cu(s) + 4HNO₃(aq) -> Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)

Answer:

h30

Explanation:

The chemical formula for peracetic acid is C2H4O3. This means that there are 2 atoms of carbon, 4 atoms of hydrogen, and 3 atoms of oxygen in a single molecule.

I think that the answer is C2H4O3.

Answer:

https://swartzbiotechnologylab.sites.stanford.edu/research

Explanation:

Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.

Frederick Jean Edmond Swarts first reported this procedure in 1892. Heating the alkyl chloride or alkyl bromide in the presence of heavy metal fluorides like AGF, Hg2F2, CoF2, or SbF3 causes this reaction.

Swartz process can be used to modify work for bacteria. Bacterial biofilms are collections of microorganisms where the cells are immersed in an extracellular polymeric matrix that the bacteria have self-produced.

In contrast to planktonic bacteria, which are in a state of free movement in a bulk solution, this situation is very different.

Applications:

Therefore, Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.

To learn more about the Swartz process, refer to the link:

https://brainly.com/question/10019079

#SPJ2

Answer:

you're righttttttttttttttttttttt

Answer:

yes because my class went over sum like that

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 928.8 \ grams}}[/tex]

Explanation:

Density is the mass per unit volume of a substance. The following formula is used for calculating density.

[tex]\rho= \frac{m}{v}[/tex]

We know the density of aluminum is 2.70 grams per milliliter. The mass is unknown, but we know the piece of aluminum has a volume of 344 milliliters.

Substitute these values into the formula.

[tex]2.70 \ g/mL = \frac {m}{344 \ mL}[/tex]

We are solving for the mass, so we must isolate the variable m. It is being divided by 344 milliliters. The inverse operation of division is multiplication. Multiply both sides of the equation by 344 mL.

[tex]344 \ mL *2.70 \ g/mL = \frac {m}{344 \ mL} * 344 \ mL[/tex]

[tex]344 \ mL *2.70 \ g/mL =m[/tex]

The units of milliliters cancel.

[tex]344 *2.70 \ g=m[/tex]

[tex]928.8 \ g =m[/tex]

The mass of the piece of aluminum is 928.8 grams.

Explanation:

Coal is formed when dead plantand animals matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

Answer:

[tex]\boxed{\boxed {\sf 5930.0 \ mol \ CH_4}}[/tex]

Explanation:

We are asked to find how many moles of methane (CH₄)  a cow produces in a year. We must convert molecules of methane to moles of methane. We will do this using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance.

In this case, the particles are molecules of methane. There are 6.022 × 10²³ molecules of methane in 1 mole.

We will convert molecules to moles using dimensional analysis. Set up a ratio using Avogadro's Number.

[tex]\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

We are converting 3.571 × 10²⁷ molecules of methane to moles, so we multiply the ratio by this value.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

Flip the ratio. It is still the same value, but the units of molecules of methane cancel.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} \ molecules \ CH_4}[/tex]

[tex]3.571 \times 10^ {27} *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} }[/tex]

[tex]\frac {3.571 \times 10^ {27}}{6.022 \times 10^{23} } \ mol \ CH_4[/tex]

[tex]5929.923613 \ mol \ CH_4[/tex]

The original measurement of molecules of methane( 3.571 × 10²⁷ molecules) has 4 significant figures, so our answer must have the same. For the number we calculated, that is the ones place. The 9 in the tenth place tells us to round the 9 in the ones place up to a 0, then the 2 in the tens place up to a 3.

[tex]5930 \ mol \ CH_4[/tex]

We must add a placeholder zero in the tenth place to reach 4 sig figs.

[tex]5930.0 \ mol \ CH_4[/tex]

The adult cow produces approximately 5930.0 moles of methane in a year.

Answer:

» Water changes from colorless to a pale colored solution.

» The solubility of water reduces because a saturated solution is formed.

» The freezing point of water decreases. [colligative property]

» The boiling point of water elevates [colligative property]

» The vapour pressure of water lowers [colligative property]

Explanation:

[tex].[/tex]

Answer:

4.735 litres

Explanation:

10 dL = 1 litre

47.35 dL = 47.35/10 = 4.735 litres

Answer:

C.

Explanation:

The arrows represent the Earth spinning on its own axis in this picture.

Answer:

A. The relationship between the Sun,Moon,and Earth

Explanation:

Answer:

Thallium is a Solid

Hope it helps

Mark me as Brainliest plz!

:DD

Answer:

You are unable to lift an object. Which property makes the object difficult to lift?(1 point)

weight

Answer:

............................

Answer:

none of the above answers

Explanation:

higher or lower energy, depending on the element

Answer:

B

Explanation:

Answer:

h = 34.2 in

Explanation:

h = 3.0a + 28.2

h = height of a girl.

a = age of a girl.

h = 3.0a + 28.2

h = 3.0(2) + 28.2

h = 6 + 28.2

h = 34.2

The estimated height of a 2-year-old girl is 34.2 in.

Hope this helps, thank you :) !!

Answer:

HOPE THIS ANSWER WILL HELP YOU

Answer:

m=dxv

= 10.5 x 965 = 10132.5 rounded off to 10100 g

Explanation:

Answer:

19.278049929737628457607385688801

Explanation:

Volume = L * W * H

Volume = 17.78 * 9.21 * 4.45 = 728.70441

Density = Mass / Volume

Mass = 14,048

14,048 / 728.70441 = 19.278049929737628457607385688801

Density = 19.278049929737628457607385688801

Explanation:

So density = mass/volume

Using this formula we'll solve the question.

mass = 14,048g/1000 = 14.048 kg

volume = 17.78/100 x 9.21/100 x 4.45/100

volume = 0.3143 m³

density = 14.048 kg/ 0.3143 m³

density = 44.69 kg/m³

round off to = 44.7 kg/m³

Answer:

E

Explanation:

This is because all steps from A-D are important to obtain an accurate result

exactly 22.0 grams

because freezing is a physical change not a chemicl change..so nothing is taken away or added

ANSWER;

exactly 22.0 grams

because freezing is a physical change not a chemicl change..so nothing is taken away or added