Animals have to eat other things to get their food, but plants can make it themselves. Plants are known as:

A. consumers
B. producers
C. chloroplasts
D. glucose

Answer:

The answer is wave

Explanation:

NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ double-replacement reactions will occur

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

A double replacement reaction will occur if one or both of the products is an insoluble precipitate, a liquid, or a gas

To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur

Solubility Rules:

• 1. soluble compound

All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +

All compounds of NO₃⁻ and C₂H₃O₂⁻

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺

Compounds of SO₄²⁻ except Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺

• 2. insoluble compounds

Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +

Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺ , Sr²⁺, and Ba²⁺

NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ occur

NaBr(aq) + Ca(NO3)2(aq) → NaNO3(aq) + CaBr₂(aq)⇒not occur

NaBr(aq) + Al(NO3)3(aq) →NaNO3(aq) + AlBr3(aq)⇒not occur

NaBr(aq) + KNO3(aq) →NaNO3(aq) + KBr(aq)⇒not occur

Answer:

[tex]Lithium=Li2s^1\\Sodium=Na3s^1\\Potassium=K4s^1\\Rubidium=Rb5s^1\\Cesium=Cs6s^1\\Francium=Fr7s^1[/tex]

Explanation:

When it comes to electron configuration and orbitals, it's important to first identify what exactly we are trying to identify. Below is a given example:

[tex]He1s^2[/tex]

[tex]He=element[/tex]

[tex]1=level[/tex]

[tex]s=orbital[/tex]

[tex](exponent)^2=electrons[/tex]

Looking at the periodic table, identify the alkali metal family on the periodic table, or group one elements:

[tex]Lithium=Li2s^1\\Sodium=Na3s^1\\Potassium=K4s^1\\Rubidium=Rb5s^1\\Cesium=Cs6s^1\\Francium=Fr7s^1[/tex]

Notice how each configuration has an exponent of [tex]1[/tex], representative of a single electron in their s-orbital.

a. 1,4332 g

b. 7.54~g

Given

Reaction

MgCl2 (s) + 2 AgNO3 (aq) → Mg(NO3)2 (aq) + 2 AgCl (s)

20 cm of 2.5 mol/dm^3 of MgCl2

20 cm of 2.5 g/dm^3 of MgCl2

Required

the mass of silver chloride - AgCl

Solution

a. mol MgCl2 :

[tex]\tt 20~cm^3=20\times 10^{-3}~dm^3\\\\mol=M\times V\\\\mol=2.5~mol/dm^3\times 20\times 10^{-3}DM^3=0.05[/tex]

From equation, mol AgCl = 2 x mol MgCl2=2 x 0.05=0.1

mass AgCl(MW=143,32 g/mol)= 0.1 x 143,32=1,4332 g

b. mol MgCl2 (MW=95.211 /mol):

[tex]\tt mol=M\times V\\\\mol=\dfrac{2.5~g/dm^3}{95,211 g/mol}=0.0263~mol/dm^3[/tex]

From equation, mol AgCl = 2 x mol MgCl2=2 x 0.0263=0.0526

mass AgCl(MW=143,32 g/mol)= 0.0526 x 143,32=7.54~g

Answer:

Explanation:

number 12 is magnesium i think which is group lla which is B alkaline earths

She will create a solution.

Answer: 3915 K ​(3642 °C, ​6588 °F)

Answer:

8,721°F

OR

4,827°C.

Explanation:

Good Luck!

Answer:

Digestive system

Explanation:

..........

Answer:

Steps of the technological design process include: identify a problem, research the problem, generate possible solutions, select the best solution, create a model, test the model, refine and retest the model as needed, and communicate the final solution.

Explanation:

hope it helps, please mark brainliest

Steps of the technology design process include: identify a problem, research the problem, generate possible solutions, select the best solution, create a model, test the model, refine and retest the model as needed, and communicate the final solution.

Technology is the application of knowledge for achieving practical goals in a reproducible way.The word technology can also mean the products resulting from such efforts, including both tangible tools such as utensils or machines, and intangible ones such as software. Technology plays a critical role in science, engineering, and everyday life.

Technological advancements have led to significant changes in society. The earliest known technology is the stone tool, used during prehistoric times, followed by the control of fire, which contributed to the growth of the human brain and the development of language during the Ice Age. The invention of the wheel in the Bronze Age allowed greater travel and the creation of more complex machines. More recent technological inventions, including the printing press, telephone, and the Internet, have lowered barriers to communication and ushered in the knowledge economy.

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Answer:

what are the options to the question

Answer:

b and c

Explanation:

just took it on edge :)

Answer: D?  

Explanation: The mitochondrion (plural mitochondria) is a membrane-bound organelle found in the cytoplasm of eukaryotic cells. It is the power house of the cell; it is responsible for cellular respiration and production of (most) ATP in the cell.

Answer:

Mass = 713.4 ×10⁻⁴ g

Explanation:

Given data:

Number of moles of calcium phosphate = 2.3×10⁻⁴ mol

Mass of calcium phosphate = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of calcium phosphate is 310.18 g/mol

by putting values,

2.3×10⁻⁴ mol = mass / 310.18 g/mol

Mass = 2.3×10⁻⁴ mol × 310.18 g/mol

Mass = 713.4 ×10⁻⁴ g

Answer:

67.0 g Lead (ll) Nitrate

Explanation:

first, find you mass for each element

Pb= 207 g

N=14 g

207(2)+14=428 g

now convert to grams using the standard moles conversion

0.270 moles (248 g/1 mole) = 66.96

round to the correct number of significant figures, 3.

66.96= 67.0 g

Answer:

when you use energy , the total amount of energy decreases.

Answer:

C help stop bleeding

Explanation:

Platelets stop bleeding by clumping and forming plugs in blood vessel injuries

on the left side of the arrow

The reactants in the chemical equation located on the left side of the arrow. Option D is correct.

The arrow in the chemical equation represents the direction of the chemical reaction, and it separates the reactants from the products.

A chemical equation is a symbolic representation of a chemical reaction, showing the starting materials (reactants) and the resulting substances (products). The general form of a chemical equation is as follows:

Reactants → Products

Reactants: The reactants are the substances present at the beginning of the chemical reaction. They are the starting materials that undergo a chemical change or reaction to produce new substances. Reactants were written on the left side of the arrow.

Arrow: The arrow in the chemical equation points from the reactants to the products, indicating the direction of the reaction. It symbolizes the transformation of reactants into products during the chemical reaction.

Products: The products are the substances formed as a result of the chemical reaction. They are the new compounds or elements that are produced by rearranging the atoms of the reactants. Products were written on right side of the arrow.

For example, let's consider the combustion of methane (CH₄) in oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O):

CH₄ (methane) + 2 O₂ (oxygen) → CO₂ (carbon dioxide) + 2 H₂O (water)

In this chemical equation, methane (CH₄) and oxygen (O₂) are the reactants, and they are located on the left side of the arrow. The products, carbon dioxide (CO₂), and water (H₂O), are located on the right side of the arrow.

Hence, D. is the correct option.

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Answer

Explanation:

Recall that the land surface cools quicker than the water surface at night. Therefore, the warmer air over the ocean is buoyant and is rising. The denser cool air over the land is flowing offshore to replenish the buoyant warm air and is called a land breeze.

Answer:

4. O^2-

Explanation:

O^2 has 16 electrons, while Ne has 18 electron. O^2- is a molecule that has one electrons added to each atom, meaning that there are two extra electrons. Which makes O^2 the same electron configuration as an atom of neon.

The ions having same electronic configuration as neon are Calcium, oxygen, and chlorine ion. Thus, options 1, 2, and 4 are correct.

The electronic configuration has been defined as the electron address in a atom. The electronic configuration has been based on the quantum rule for the filling of the electrons.

The number of electrons present in Neon has been 18. Thus, the ion with the presence of 18 electrons has same electronic configuration as Neon.

The number of electrons in the following ions are:

[tex]\rm Ca^{2+}=18\\Cl^-=18\\Li^+=4\\O_2^{-}=18[/tex]

The number of electrons of calcium ion and chlorine ion are similar to the number of electrons of Ne. Thus the ions having same electronic configuration as neon are Calcium, oxygen and chlorine ion. Thus, options 1, 2, and 4 are correct.

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Answer:

E = 1.89×10⁻¹⁹ J

Explanation:

Given data:

Wavelength of photon = 105 nm (105 ×10⁻⁹ m)

Energy of photon = ?

Solution:

Formula:

E = hc/λ

h = plancks constant = 6.63×10⁻³⁴ Js

c = speed of wave = 3×10⁸ m/s

by putting values,

E =  6.63×10⁻³⁴ Js ×3×10⁸ m/s / 105 ×10⁻⁹ m

E = 19.89×10⁻²⁶ J.m / 105 ×10⁻⁹ m

E = 0.189×10⁻¹⁷ J

E = 1.89×10⁻¹⁹ J

Answer:

1. the reaction rates can not decrease

2. correct!

3. correct!

4. decreasing the amount of reactants

5. correct!

Explanation:

good luck!

A. Zn²⁺

Given

Cations of several elements

Required

The least to be reduced

Solution

If we look at the voltaic series:

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe²⁺-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Fe³⁺-Ag-Pt-Au

The electrode which is easier to reduce than the hydrogen (H2) electrode has a positive sign (E red= +) and is located to the right of the voltaic series (right of H)

The electrode which is easier to oxidize than the hydrogen (H2) electrode and is difficult to experience reduction has a negative sign (E red= -) and is located to the left of the voltaic series (left of H)

Or you can look at the standard reduction potential value of the metals in the answer options, and the most negative reduction E° value which will be difficult to reduce.

The Zn metal is located far left of the other metals in the answer choices, so it is the most difficult to reduce

Answer:

One element takes the place of another in a compound

Explanation:

a p e x - just did the test

The statement best describes a single-replacement reaction as one element takes the place of another in a compound. The correct option is A.

A single replacement reaction is one in which when the reaction happens, one element is substituted by another in a compound. It is also called displacement reaction. The replacing material will always be a pure element.

An example is Zn + 2HCl -> ZnCl₂ + H₂

Thus, the correct option is A. one element takes the place of another in a compound.

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Answer:

B

Explanation:

sorry I have to write here

Answer:

a

Explanation:

i got it right

Answer:

def don't understand that sorry

Answer:

The wavelength is 7.0x10⁻⁴⁷ m

Explanation:

To solve this problem we can use the equation:

Where:

We put the data given by the problem:

And solve for λ:

Answer:

chloroplasts, cell walls, or intracellular vacuoles

Explanation:

You didn't list the following, but I'm guessing it is chloroplasts, cell walls, or intracellular vacuoles

Answer:

See explanation

Explanation:

The equation of the reaction is;

CH3COOCH3 + H2O -------> CH3COOH + CH3OH

Now recall that the rate of reaction refers to the rate of disappearance of reactants or the rate of appearance of products. We indicate that reactants disappear by a negative sign placed in front of the concentration term of reactants.

Rate = k -d[CH3COOCH3]/dt

Rate = k d[CH3COOH]/dt

Rate = k d[CH3OH]/dt

Note; i did not write the rate in terms of water because it is a solvent that is present in large excess. Its concentration does not change with time.