Pl help it’s for homwork

Answer:

Explanation:

K: 157.8 g CaCl2

U: ? mol CaCl2

1Ca = 1(40.08) = 40.08

2 Cl = 2(35.45) =+70.90

110.98

157.8 g CaCl2 1 mol CaCl2

x

1 mol CaCl2 110.98 g CaCl2

Answer:

5.7997

Explanation:

Answer:

An ocean current is a continuous, directed movement of seawater generated by forces acting upon this mean flow, such as breaking waves, wind, the Coriolis effect, cabbeling, and temperature and salinity differences. Features like depth contours, shoreline configurations, and interactions with other currents also influence an ocean current’s direction and strength. Ocean currents flow for great distances, and together, create the global conveyor belt that plays a dominant role in determining the climate of many of the Earth’s regions (illustrated in the NASA video below). For example, the Gulf Stream makes northwest Europe much more temperate than any other region at the same latitude. Another example is Lima, Peru where the climate is cooler than the tropical latitudes in which the area is located, due to the effect of the Humboldt Current.  Ocean modelling uses a mathematical model of the general circulation of an ocean, based on the Navier–Stokes equations on a rotating sphere with thermodynamic terms for various energy sources (radiation, latent heat). These equations are the basis for complex computer programs commonly used for simulating the atmosphere or ocean of the Earth.

Explanation:

Answer:

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b. it's b

Explanation:

b

Answer:

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.

Answer:

250J

Explanation:

Given parameters:

Spring constant  = 500N/m

Extension  = 1m

Unknown:

Elastic potential energy  = ?

Solution:

The elastic potential energy of a body is the energy stored within an elastic string.

  EPE  = [tex]\frac{1}{2}[/tex] k e²

k is the spring constant

e is the extension

 Now;

      EPE  =  [tex]\frac{1}{2}[/tex]  x 500 x 1²   = 250J

Answer:

1.12M

Explanation:

Given parameters:

Volume of solution  = 2.5L

Mass of Calcium phosphate  = 600g

Unknown:

Concentration  = ?

Solution:

Concentration is the number of moles of solute in a particular solution.

Now, we find the number of moles of the calcium phosphate from the given mass;

        Formula of calcium phosphate  = Ca₃PO₄

         molar mass = 3(40) + 31 + 4(16) = 215g/mol  

Number of moles of  Ca₃PO₄  = [tex]\frac{600}{215}[/tex]   = 2.79moles

   Now;

  Concentration  = [tex]\frac{Number of moles }{volume }[/tex]  

 Concentration  = [tex]\frac{2.79}{2.5}[/tex]   = 1.12M

Answer:

A = Metallic Bond

B = Strong bonding, strong conductor, high melting and boiling points

Explanation:

Since the bond is between two metals (located in groups 11 and 12), they would experience metallic bonding. Metallically bonded molecules have high melting and boiling points due to the strength of the metallic bond. They also experience strong electrical current due to the there delocalized electrons.

Answer:

A=metallic

B= conducts electricity as a solid

C=covalent

D=does not conduct electricity

Explanation:

got it correct on edge 2022

Answer:

It is the first or second one. The other two didn't work for me.

Explanation:

Hope this helps :)

Answer:

It will be apathetic and non-caring

Explanation:

Explanation:

Geological activity determines geological structures. The prevalent types and forms of tectonic working in a place will control the form of structure that can be found in a terrain.

So, geologic activities controls the structure found in an area

Answer: the

Explanation:

Answer: 334.6 moles of O, 167.3 moles as O2

Explanation:

20.15x10^25/6.02214076x10^23 = 334.6 as atoms, 167.3 as O2

Answer: The smallest bond angle in the molecule x-y-x is [tex]180^0[/tex]

Explanation:

According to VSEPR theory , each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom.

In the given compound [tex]x-y-x[/tex], the number of electron pairs is 2 that means the hybridization will be [tex]sp^2[/tex]  and geometry of the molecule will be linear as there are two bond pairs .The bond angle for linear geometry is 180° which reduces the electron electron repulsions and maximise stability.

Answer:

Explanation:

H₃O⁺ and H₂O .

H₂O + H⁺  ⇄   H₃O⁺

H₂O accepts proton to form H₃O⁺ so H₂O is base .

H₃O⁺  ⇄   H₂O + H⁺

Here H₃O⁺  is acid because it gives proton ( H⁺ ) .

HCO₃ ⁻ and H₂CO₃

H₂CO₃  ⇄   HCO₃ ⁻ + H⁺

H₂CO₃ is acid because it gives proton ( H⁺ )

HCO₃ ⁻ + H⁺ = H₂CO₃

HCO₃ ⁻  is base because it accepts proton .

Answer:

602214085700000000000000

Explanation:

The scientific notation form for the avogadro constant is given as;

6.022140857 × 10^23

The standard form with a lot of zeros is given as;

602214085700000000000000

Answer:

1.156x10²⁵ atoms and 4.8x10²⁴ atoms of oxygen

Explanation:

1 mole of a molecule X contains 6.022x10²³ molecules. In a molecules as H₂O, for example, there are 3 atoms (2 of H and 1 of O).

Thus, in 1 molecule of K₂SO₃ there are 6 atoms (2 of K, 1 of S, 3 of O). In 3.2 moles there are:

3.2mol K₂SO₃ * (6.022x10²³ molecules / 1mol) = 1.927x10²⁴ molecules.

The atoms are:

1.927x10²⁴ molecules * (6atoms / molecule) =

1.156x10²⁵ atoms

In 4 moles of oxygen, O₂, there are 2 atoms per molecule :

4mol * (6.022x10²³ molecules / mol) = 2.4x10²⁴ molecules * (2atom / molecule) =

4.8x10²⁴ atoms of oxygen

Answer:

communicate verbally and maintain structure

Answer:

A hot air balloon uses a burner to heat up the air inside the balloon. The burner is usually fueled by liquid propane. The burner mixes the fuel with air and ignites the mixture, which creates a flame directly underneath the bottom opening of the hot air balloon.  Once the air inside the balloon begins to get warm, the balloon will rise. The pilot controls the balloon’s altitude by releasing hot air from a vent at the top of the balloon, releasing the warmer air causes the balloon to descend.

Explanation:

Answer:

to increase enthalpy

Explanation:

Answer:

D. The plates are different in size from the landmasses.

Explanation:

Answer:

d = 2.57456 g/cm³

Explanation:

Given data:

Length of metal bar = 853cm

Width = 24 cm

Height = 10 cm

Mass = 527064 g

Density of metal = ?

Solution:

Volume of metal bar:

Volume = length × width × height

Volume = 853 cm × 24 cm × 10 cm

Volume = 204720 cm³

Density:

d = m/v

d = 527064 g / 204720 cm³

d = 2.57456 g/cm³

Answer:

B

Explanation:

Answer:

B. An increase in carbon dioxide in the atmosphere

Explanation:

Answer:

In each Amplify Science unit, students figure out

a phenomenon by asking questions, gathering

evidence, and coming up with an explanation of how

the phenomenon works. The Coherence Flowchart

visually represents the storyline of the unit, showing

the coherent flow of questions, evidence, and ideas that

support students as they build complex explanations

of the unit’s anchor phenomenon. The Coherence

Flowchart on the following pages (one chapter per

page) can be used to see the connections between

the questions that drive students’ experiences, the

evidence they gather, the ideas they figure out, and the

new questions that those ideas generate. The diagram

to the right explains the structure of a chapter in the

Explanation:

Answer:

flase

Explanation:

i got the answer from khan

Answer:

4.22 × 10 ⁻²² mol

Explanation:

Given data:

Number of molecules of bromine = 254 molecules

Number of moles = ?

Solution:

1 mole = 6.02 × 10 ²³ molecules

254 molecules × 1  mol / 6.02 × 10 ²³ molecules

42.2 × 10 ⁻²³ mol

4.22 × 10 ⁻²² mol