RODINNIS
COURSES
onal Science
Attempt 1 of 2
Which of the following distinctions are used to identify sedimentary rock? Select all that apply.
o where is was formed
conditions it was formed under
n when it was formed
what it is composed of
how many layers it consists of
NEED HELP ASAP (check the picture)

Answer:

C. read the label on the container

Explanation:

What information is found in an SDS? Check all that apply.

A. the identification of the chemical

C. the chemical and physical properties of the substance

D. the first-aid measures to take if an accident occurs involving the chemical

Answer:

C

Explanation:

just did it

Answer: [tex]Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)[/tex] .

The insoluble product is lead (II) chloride.

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.  

The balanced chemical equation is:

[tex]Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)[/tex]

The insoluble product is lead (II) chloride.

Answer:

D is balanced. :)

Among the following equations the one that represents the balanced equation for the reaction of iron and oxygen is a.

4Fe + 3O₂ → 2Fe₂O₃

Balancing of a reaction is done according to the "Law of conservation of mass" and balancing helps in solving stoichiometry questions correctly as if we will not balance the reaction then the quantitative results in a particular question doesn't come correctly.

Balancing of a reaction helps in mole concept as well and it is one of the laws of chemical reactions as well.

Some examples of balanced chemical reactions are-

2Mg(s) + O₂(g) ⟶ 2MgO(g)

Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + H₂O

Therefore, Among the following equations the one that represents the balanced equation for the reaction of iron and oxygen is a.

4Fe + 3O₂ → 2Fe₂O₃

Learn more about Balancing of a reaction here:

https://brainly.com/question/14280002

#SPJ2

Answer and Explanation:

HCl, also known as hydrochloric acid, has a covalent bond. The hydrogen (H) atom shares an electron with the chlorine (Cl) to form the bond.

Answer:

P tot = 0.1065 atm

The mole fraction of oxygen in the mixture : 0.709

Given

10 L flask

1.013 g O₂

572 g CO₂

T = 18 °C = 291 K

Required

P O₂ and P CO₂

Solution

Dalton Law's of partila pressure

P tot = P₁ + P₂ + ..Pₙ

From ideal gas Law :

[tex]\tt P_{O_2}=\dfrac{\dfrac{1.013}{32}\times 0.082\times 291 }{10}\\\\P_{O_2}=0.0755~atm[/tex]

[tex]\tt P_{CO_2}=\dfrac{\dfrac{0.572}{44}\times 0.082\times 291}{10}\\\\P_{CO_2}=0.031~atm[/tex]

P tot = P O₂ + P CO₂

P tot = 0.0755 + 0.031

P tot = 0.1065 atm

The mole fraction of  O₂ :

[tex]\tt P_{O_2}=X_{O_2}\times P_{tot}\\\\X_{O_2}=\dfrac{P_{O_2}}{P_{tot}}\\\\X_{O_2}=\dfrac{0.0755~atm}{0.1065~atm}\\\\X_{O_2}=0.709[/tex]

Answer:The answer is D

The image that shows the phase of the moon one ( 1 ) week after the new moon is ;  ( Image G )

The quarter at which the moon will be one(1) week after the new moon is up in the sky is the first quarter. And at the first quarter the moon will be in its " waning gibbous " phase.

The waning gibbous phase is the stage in the new moon cycle where only one half ( 1/2 ) or 50% of the moon is lit and the moon will remain in this stage up until 21 days.

Hence we can conclude that the image that shows the phase of the moon one week after the new moon is Image G.

Learn more : https://brainly.com/question/21449386

Answer:

The answer is true

Explanation:

Hope this can help

Answer: Carbon Dioxide, Methane, Nitrous Oxide and Fuorinated Gases

Explanation:Carbon dioxide (CO2): Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement). Carbon dioxide is removed from the atmosphere (or "sequestered") when it is absorbed by plants as part of the biological carbon cycle.

Methane (CH4): Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.

Nitrous oxide (N2O): Nitrous oxide is emitted during agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater.

Fluorinated gases: Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride are synthetic, powerful greenhouse gases that are emitted from a variety of industrial processes. Fluorinated gases are sometimes used as substitutes for stratospheric ozone-depleting substances (e.g., chlorofluorocarbons, hydrochlorofluorocarbons, and halons). These gases are typically emitted in smaller quantities, but because they are potent greenhouse gases, they are sometimes referred to as High Global Warming Potential gases ("High GWP gases").

Answer:

Ans => C => 43.3%

Explanation:

2CO + O₂ => 2CO₂

Given     1g CO = 1g/28g·mol⁻¹ = 0.036 mol CO

b/c coefficient of CO = coefficient of CO₂ => moles CO₂ = 0.036 mol = 0.036mol x 44g/mol = 1.57 gCO₂ (theoretical yield)

%Yield = (actual yield/theoretical yield) x 100% = (0.68g/1.57g) x 100% = 43.3%

Answer:

1. (See explanation)

2. 46. 23 from the mother’s egg and 23 from the father’s sperm.

Explanation:

ok for number one I am not entirely sure, but I am pretty sure that light, chemicals and temperature can all affect which genes get turned on and off. I am not entirely sure if the question is asking about the environment influencing inherited traits in the form of natural selection tho? If that is something you’re seeing right now, it might be a possible answer. But honestly I am not completely sure.

Answer:

Physical is to chemical as size is to length

Explanation:

That's for if your looking for the synonym of size. (i dont really know what your asking, but if your looking for the opposite of size than its length.)

Answer:

B

Explanation:

I hope its right. I'm pretty sure.

Answer:

Explanation:

Copper Atom

Answer:

Longer wavelengths self means by it's name that the distance between the trough and crust are lesser than that of shorter wavelengths!

The word Lower frequency implies lower energy, thus light cannot easily penetrate the EM wave to excite electrons.

Examples of EM waves with longer wavelength :

Radiowaves, microwaves, etc..

Answer:

yolo go with C

Explanation:

Answer:

1. 0.0033 moles of water.

2. 270g of water

3. 12.8g NaCl

4. 6.72g NaHCO3

5. 1190moles Fe2O3

Explanation:

To convert moles to grams or vice versa we require tu use molar mass of the substance as follows:

1. Molar mass water: 18g/mol

0.060g * (1mol / 18g) = 0.0033 moles of water

2. Molar mass water: 18g/mol

15 moles H₂O * (18g / 1mol) = 270g of water

3. We can assume all sea salt is NaCl -Molar mass: 58.44g/mol-

750g NaCl * (1mol / 58.44g) = 12.8g of NaCl

4. Molar mass NaHCO₃: 84g/mol:

0.080mol * (84g/mol) = 6.72g NaHCO3

5. Molar mass Fe2O3: 159.69g/mol:

190kg = 190000g * (1mol / 159.69g) = 1190moles Fe2O3

Answer:

It's used in the vulcanisation of black rubber, as a fungicide and in black gunpowder and a production of sulfuric acid.

Explanation:

Answer:

3.44 × 10²⁴ atoms of oxygen

Explanation:

Step 1: Calculate the moles corresponding to 163 g of Al₂(SO₄)₃

The molar mass of Al₂(SO₄)₃ is 342.15 g/mol.

163 g × 1 mol/342.15 g = 0.476 mol

Step 2: Calculate the molecules in 0.476 moles of Al₂(SO₄)₃

We will use Avogadro's number: there are 6.02 × 10²³ molecules of Al₂(SO₄)₃ in 1 mole of Al₂(SO₄)₃.

0.476 mol × 6.02 × 10²³ molecules/1 mol = 2.87 × 10²³ molecules

Step 3: Calculate the atoms of O in 2.87 × 10²³ molecules of Al₂(SO₄)₃

According to the chemical equation, the molar ratio of Al₂(SO₄)₃ to O is 1:12. The atoms of O are 12/1 × 2.87 × 10²³ = 3.44 × 10²⁴.

Answer: The earth spins while we also rotate around the sun the sun is well to us still when actually in reality the whole galaxy is moving but our planet spins and with it comes to night and day.

Explanation:

Answer:

D it is D

Explanation:

Doing this because I know I'm kickass at Chemistry.

One source would be human emissions. As humans, we use a lot of machines (like power plants) that produce large amounts of carbon dioxide into the atmosphere. The ocean also produces a lot of carbon dioxide via the evaporation cycle. Polluted waters eventually will go into the atmosphere. Volcanoes, even when not erupted, emit a lot of carbon dioxide as well. Dormant underground magma releases carbon dioxide through the Earth's pores, and even when a volcano erupts, it produces carbon dioxide as well.

Answer:

1:1

Explanation:

Since that is it's half life.

Answer:

Only one side of the spherical Moon is ever visible from Earth it wasn't until 1959 when the Soviet Spacecraft Luna 3 orbited the Moon and sent pictures home that human beings were able to see the "far side" of the Moon for the first time. A phenomenon called tidal locking is responsible for the consistent view

Answer:

2X₂Y₃    →     4X     +     3Y₂

Explanation:

This problem is about balancing chemical equations.

The reaction is given as:

          X₂Y₃    →     X     +     Y₂

To balance the reaction equation, we use a mathematical approach.

      aX₂Y₃    →     bX     +     cY₂

Conserving X;   2a  = b

                    Y;   3a = 2c

Now, let us make a  = 1

                              b  = 2

                              c  = [tex]\frac{3}{2}[/tex]  

Multiply through by 2;

         a  = 2, b  = 4 , c  = 3;

        2X₂Y₃    →     4X     +     3Y₂

b. increase in surface area

Given

Speeding up a chemical reaction

Required

Factors used to speed up reactions

Solution

There are several factors that influence reaction kinetics :  

1. Concentration  

2. Surface area  

3. Temperature  

4. Catalyst  

5. Pressure  

6. Stirring  

Temperature is related to the kinetic energy of the particles. Heat is absorbed causes the particles of matter to move faster so that the reaction can take place faster

The enlarged surface area of the reactants causes more particles to react with other particles.

50 g square block of sulfur can be broken into small pieces or powdered so that more particles come into contact with each other

Answer:

C. An upward force is created

Explanation:

As an airplane moves forward, the shape of its wing creates lower pressure above the wing than below, yielding a net upward force known as lift.

Hope this helps!

Answer:

ZnO + H2SO4 = ZnSO4 + H2O | Chemical reaction and equation

Explanation:

gloogle

Answer:

The answer is Community  

Explanation:

Answer:   So, a line segment is a piece or part of a line having two endpoints. Unlike a line, a line segment has a definite length.

Explanation:

Answer:

a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints.

Answer:

MgF2 + Li2CO3 ---> MgCO3 + 2LiF

Explanation: