help i give more point this time​

Answer:

2. They are hollow.

Explanation:

goo  gle says

Answer:

california

Explanation:

Answer:

See explanation

Explanation:

When we are writing chemical reaction equations, we must ensure that such equations are balanced. That is, the number of atoms of each element on both sides of the reaction equation are exactly the same.

After we identify the formula of each compound in the reaction, then we proceed the write the balanced reaction equation as follows;

CuCl2 + 2AgNO3 -------> Cu(NO3)2  + 2AgCl

Answer:

1.566x10²⁴ atoms of Cl

Explanation:

In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:

Moles CCl₄: 153.82g/mol

100g * (1mol / 153.82g) = 0.65 moles CCl₄

Moles Cl:

0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl

Atoms Cl:

2.6 moles Cl * (6.022x10²³ atoms / mol) =

Answer:

2:3

You'd need 33.3 moles of potassium chlorate, KClO3 , to produce that much oxygen. Notice that you have a 2:3. mole ratio between potassium chlorate and oxygen gas, which means that, regardless of how many moles of the former react, you'll always produce 3/2 times more moles of the latter.

Explanation:

Answer: A.

Explanation:

Answer:

A. Linear molecule with one domain.

Hope this helps! :)

Explanation:

Answer:

C. Behavior of the particles

Answer:

I think (B) is right answer because here oxygen is a combustible material and combustible is always take place when oxygen is burn

In the balanced equation, the mass of reactant is exactly equal to the mass of product. The respective coefficients needed to balance the equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

The Law of Conservation of Mass is followed by a balanced equation. This is a crucial scientific guiding principle. Finally, a balanced equation enables us to forecast the quantity of reactants and products that will be produced. Sort of crucial if you're attempting to determine how much fuel to supply a spacecraft traveling to Mars

Thus, the balanced equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

To learn more about balanced equation, follow the link;

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Answer:

C

Explanation:

thats the answer!! HEHEHHEHHHHSJSKSSSSJS

Answer: B or A

Explanation: Everyone is saying C and i just took the test and it is not C

the answer is A.

the scientist used mud and vinegar to make a model of the volcano.

Answer:

A i think

Explanation:

The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.

A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.

“Microorganisms are minute organisms that are invisible to the normal eye.” Microorganisms are so small that they can only be seen under a microscope. These include a huge range of organisms such as bacteria, viruses, fungi, algae, protozoa, etc.

Given options are-

A. adding manure or compost to the soil

B. spraying chemical weed-killers and fertilizers on the soil

C. removing all ground-covering plants from the soil

D. adding sewage containing synthetic materials to the soil

Therefore, The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.

Learn more about microorganisms here:

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Answer:

C

Explanation:

Mostly all of them but most likely C

Answer:

★ B. A washing machine.

Explanation:

What's Electrical energy?

Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.

Answer:

657/865= 75.9

D. 76%

Answer:

49.2°C is the temperature

Explanation:

Based on Charles's law, the absolute temperature of a gas is directly proportional to the volume under constant pressure. The equation is:

V1 / T1 = V2 / T2

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

Computing the values of the problem:

V1 = 0.432L

T1 = -20.0°C + 273.15K = 253.15K

V2 = 0.550L

T2 = ?

0.432L / 253.15K = 0.550L / T2

322.3K = T2

322.3K - 273.15 =

Answer:

your answer gonna be 20 miles

Answer:

I kinda forgot. I'm sorry if I didn't answer your question.

Explanation:

Answer:

Molal concentration of glucose = 2.64 m

Explanation:

The excersise can be solved by the formula for colligative property, elevation of boiling point.

ΔT = Kb . m . i

As glucose (C₆H₁₂O₆) is an organic compound, i = 1. (No ions generated)

ΔT = Boiling T° for solution - Boiling T° of pure solvent

Kb = Ebulloscopic constant.

We need data from acetic acid.

Boiling T° of pure solvent: 118.1°C

Kb = 3.22 °C/m

We replace data:

126.6°C - 118.1°C = 3.22°C/m . m . 1

(126.6°C - 118.1°C) / 3.22 m/°C = m

Molality = 2.64 mol/kg

Answer: The concentration of [tex]I_2[/tex] at equilibrium is 0.45 M

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as [tex]K_c[/tex]  

For the given chemical reaction:

[tex]H_2(g)+I_2(g)\rightarrow 2HI(g)[/tex]

The expression for [tex]K_c[/tex] is written as:

[tex]K_c=\frac{[HI]^2}{[H_2]^1[I_2]^1}[/tex]

[tex]6.0=\frac{(0.90)^2}{(0.30)^1\times (I_2)^1}[/tex]

[tex][I_2]=0.45M[/tex]  

Thus concentration of [tex]I_2[/tex] at equilibrium is 0.45 M

Answer:

https://download.cnet.com/1-Click-Answers/3000-2378_4-10060189.html

Explanation:

Answer:

Option c.

Explanation:

According to Newton's law, formula to solve this problem is:

F = m . a

Mass → 1000 kg

a → 3 m/s²

F = 1000 kg . 3m/s² →  3000 N

1 N = 1 kg .  m/s²  according to SI, Internation System of units.

Answer:

89 mL of solution would contain the given amount of Al(NO₃)₃.

Explanation:

Hope this help

Answer: a. nitrogen

Explanation:

Nitrogen comprises of five valence electrons in its outermost shell which enables it to form triple, double and single bonds with other atoms. It can share three electrons with other nitrogen atom and form a covalent bond. Moreover, nitrogen can form multiple bonds with itself and with other elements due to its small size and high electronegativity. Nitrogen, carbon, fluorine, and oxygen are the elements with which nitrogen can form bonding.

S /\ Speed

mph, km/h, ft/s

Answer:

Calculating speed, distance and time

Explanation:

Answer:3.51 g

Explanation: M(KOH)= 39.10 + 16 + 1.008 = 56.108 g/mol

Amount of substance is n= m/M = cV and mass m= McV

Volume in litres is 0.125 l

Answer:

The answer is "[tex]1.4 \ \bold{ billion-years}[/tex]".

Explanation:

Using formula:

[tex]\to N_{Now} = N_{orige}e^{\lambda t} \\\\[/tex]

[tex]\to[/tex] 1 U atom produces 1 Pb atom after decay.

[tex]\to[/tex] U's original numbers are now the sum of U counts and Pb counts.

 [tex]\to N_U=(N_U+N_{pb})e^{\lambda Ut}[/tex]

[tex]\to 1 = (1+3) \ exp[(\frac{-\ln(2)}{t_{(half)}} \times t ]\\\\\to t = [\frac{\ln(4)}{\ln(2)}] \times t_{(half)}[/tex]

      [tex]= 14 \times 10^8 \ \ years\\\\=1.4 \ billion \ \ years[/tex]