please mark all that apply!

Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: World population growth – This article is focusing on the history of population growth up to the present.

Explanation:

Answer:

35.7 A

Explanation:

Let's consider the reduction half-reaction of Al³⁺.

Al³⁺ + 3 e⁻ ⇒ Al

We will calculate the charge required to produce 18.0 g of Al using the following conversion factors.

[tex]18.0gAl \times \frac{1molAl}{27.0gAl} \times \frac{3mole^{-} }{1molAl} \times \frac{96486C}{1mole^{-} } = 1.93 \times 10^{5} C[/tex]

1.93 × 10⁵ C circulate in 1.50 hours. The intensity is:

[tex]I = \frac{1.93 \times 10^{5} C}{1.50h} \times \frac{1h}{3600s} = 35.7 A[/tex]

Answer:

physical change.

Explanation:

because it changes its physical attributes

Answer:

phosphorus

Explanation:

Answer:

phosphorus

Explanation:

phosphorus has to lose electrons

Answer:

Marine debris comes from many different sources and enters the ocean in many ways. Intentional littering and dumping are a big cause of marine debris. ... Those rivers and streams can eventually carry the trash to the ocean. Improper or careless waste disposal is another big cause.

hope this helps

have a good day :)

Explanation:

Explanation:

a) Cr is acid K is base

b) Ca is base and the other left part is acid

c)Ca is base and F2 is acid

d) NH4 is acid and SO4 is base

Answer:

B) Multiply 3 by Avogadro's number

Explanation:

This is according to Study.com

3 moles of fluorine contains  18.066✖10²³ Particles. thus, option B is correct

One mole contains  6.022✖10²³  particles.

3 moles of flourine contains 3✖6.022✖10²³  particles

Hence, option “B” is correct

learn more about moles.

https://brainly.com/question/26416088

#SPJ2

Answer:

mass no = A

Atomic number = Z= no of protons

Neutron = n

n = A-Z

n= 35- 17

   = 18

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 12.5 \ mL \ NaOH}}[/tex]

Explanation:

In a neutralization reaction, an acid and base react to form salt and water. The hydrogen ions (H+) and hydroxide ions (OH-) combine to form water, while the other spectator ions bond to make salt.

For this reaction, the acid is HCl (hydrochloric acid) and NaOH (sodium hydroxide).

The H (from HCl) and OH (from NaOH) combine to make water (HOH or H₂O). The other ions, Cl and Na combine to form NaCl or sodium chloride. Let's write the neutralization reaction.

[tex]HCl _{(aq)}+NaOH _{(aq)} \rightarrow NaCl _{(aq)} + H_2O _{(l)}[/tex]

Now let's perform the calculation. We should use the titration equation or:

[tex]M_AV_A= M_BV_B[/tex]

where M is the molarity of the acid or base and V is the volume.

We know there are 25 milliliters of 1 molar HCl (acid) and an unknown volume of 2 molar NaOH (base).

[tex]\bullet M_A= 1 \ M \\\bullet V_A= 25 \ mL \\\bullet M_B= 2 \ M[/tex]

Substitute the known values into the formula.

[tex]1 \ M * 25 \ mL = 2 \ M * V_B[/tex]

Since we are solving for the volume of the base, we must isolate the variabel. it is being multiplied by 2 M and the inverse of multiplication is division. Divide both sides by 2 M.

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }=\frac{2 \ M * V_B}{2 \ M}[/tex]

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }= V_B[/tex]

The units of M cancel.

[tex]\frac { 1 * 25 \ mL}{2 }=V_B[/tex]

[tex]\frac {25}{2} \ mL= V_B[/tex]

[tex]12.5 \ mL= V_B[/tex]

12.5 milliliters of 2 M sodium hydroxide are required to neutralize 25 mL of 1 M hydrochloric acid.

Answer: The one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

Explanation:

A substance like metal box that has high temperature will have more kinetic energy between its molecules due to which there will be more number of collisions between them.

Hence, it is able to transfer its heat energy more  readily ac compared to a substance with low heat energy.

As a result, in the given diagram as temperature is increasing from block A to block B so heat energy will be transferred from block D to block A.

Thus, we can conclude that one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

Answer:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

Explanation:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

PLEASEEEEE CAN SOMEONE HELP MEEE??? (iI have TWO questions PLSPLSPLSPSLPLSPLSPLSP)

3.) What happened to Patroclus at the end of yesterday's reading?

He won the battle.

He went to Mt. Olympus to talk to Zeus.

He died.

-------------------------------------------------------------------------------------------------------

4.Who was Agamemnon trying to persuade to come fight with him again?

Patroclus

Achilles

Odysseus

Hector

Answer:

Barium<Strontium<Calcium <Magnesium< Beryllium

Explanation:

Electronegativity is defined as the ability of an atom in a bond to attract the shared electrons of the bond towards itself.

Electronegativity is a periodic trend that decreases down the group and increases across the period.

Hence, if i want to arrange Beryllium, Barium, Strontium, Magnesium, Calcium in order of increasing electronegativity, i will have;

Barium<Strontium<Calcium <Magnesium< Beryllium

Answer:

Explanation:

Cu(OH)2 _97.65 g/mol

Na2WO4 _293.82 g/mol

Pd _106.42 g/mol

KMnO4 _158.03 g/mol

NH3 _17.03 g/mol

Answer:

Explanation:

round 2 4-figs:

Cu(OH)2   97.65 g/mol

Na2WO4   293.8 g/mol

Pd   106.4 g/mol

KMnO4   158.0 g/mol

NH3   17.03 g/mol

Answer:

8.73 × 10²⁴ formula units

Explanation:

To calculate the number of formula units a substance contain, we multiply the number of moles by Avagadro number (6.02 × 10²³)

number of formula units = 14.50 moles × 6.02 × 10²³

= 87.29 × 10²³

= 8.73 × 10²⁴ formula units.

Answer:

zjtxxruxuxupm

Explanation:

fugilxltdptuszuourw passport RS a person Rd rseyozyoeToezyirzyorzrluziswzs the hell is going to thehdudb I have been a bit and then a email and your email find you by the way you can see the attached file is scanned image in PDF format and send it to the same

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Se administran 2500 gramos de solución por día.

Explanation:

Dado

Volumen de la solución = 2,5 litros

Como sabemos 1 litro = 1000 gramos

Por lo tanto, 2.5 litros = 2500 gramos

Se administran 2,5 litros en un intervalo de 24 horas o 1 día.

De ahí que se pueda decir que se administran 2500 gramos de solución al día.

Answer:

The independent variable

Answer:

Yes

Explanation:

Alkenes are relatively stable compounds, but are more reactive than alkanes because of the reactivity of the carbon–carbon π-bond. Most reactions of alkenes involve additions to this π bond, forming new single bonds.

Answer:

Recycling waste water, awareness about efficient use of water and rain water harvesting.

Explanation:

Our government could take to reduce competition for water use by recycling waste water, awareness about efficient use of water and rain water harvesting are the methods which can reduce competition for water supply. Awareness in people about water bring great change and the people used water efficiently. Water should be harvested through making of reservoirs which collects water from rain which can be used for drinking as well as washing purpose. Recycling of waste water also increases the amount of water and reduce competition.

Answer: Um what is it?

Explanation:

Answer:

you can simply answer vl\t1=v2/t2

Answer:

If the pressure is adjusted to  6.4 atm, the volume will be 17.47 atm.

Explanation:

Boyle's law says that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is, if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, Boyle's law indicates that the product of pressure and volume always has the same value:

P*V= k

Analyzing an initial state 1 and a final state 2, it is satisfied:

P1*V1= P2*V2

In this case:

Replacing:

17.2 atm* 6.5 L= 6.4 atm* V2

Solving:

[tex]V2=\frac{17.2atm*6.5 L}{6.4 atm}[/tex]

V2=17.47 L

If the pressure is adjusted to  6.4 atm, the volume will be 17.47 atm.

Explanation:

A= Mercury (ll) oxide

B= Mercury and Oxygen

This is an oxidation-reduction (redox) reaction:

2 HgII + 4 e- → 2 Hg0

(reduction)

2 O-II - 4 e- → 2 O0

(oxidation)

HgO is an oxidizing agent, HgO is a reducing agent.

Answer:

380

Explanation:

I couldn't find the answer anywhere so this is the correct answer. I got it graded.

Answer:

D; the pollen sticks to the stigma

Explanation:

When a flower is pollinated, the pollen sticks to the stigma. However, it is not always pollinated by insects (birds and other factors can as well), pollen can be transferred from different flowers (as long as they're the same species) and pollination doesn't stick to the anther.

Answer:

d

Explanation:

because when pollution occurs than the insects move to the flower to sick nectar and then pollan giains stuck in the insect body

Answer:

10.0g of solute before reaching saturation

Explanation:

A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have

50.0g of solute / 500.0g Solvent

Now, in 800.0g solvent you can dissolve:

800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added

As you dissolve initially 70.0g of solute. You can add:

80.0g - 70.0g =

Answer:

0.108

Explanation:

You use the formula Q =mco

M is mass

Q is th heat release

C is specific heat

O is the temperature change

Substitute what you have and what you get in the information in the equation then you will get your answers