Help me in the 10 the number. Clue- helium and hydrogen make up the first of these

Help Me In The 10 The Number. Clue- Helium And Hydrogen Make Up The First Of These

Answers

Answer 1

Answer:

helium and hydrogen make up the first of these

the answer is period


Related Questions

How long is a bench? Select the best estimate.
4 centimeters
4 milllimeters
4 kilometers
4 meters

Answers

Answer:

4 meters

Explanation:

4 centimeters and millimeters are too small, while 4 kilometers is too large.

I know the answer is A/1 but I’m not sure how to explain it, I would like some help on the explanation part

3. The accompanying diagram represents a cell in water. Formulas of molecules that can move freely across the cell membrane are shown. Some molecules are located inside the cell and others are in the water outside the cell.



(Picture) diagram



Based on the distribution of these molecules, what would most likely happen after a period of time?

A. The concentration of O₂ will increase inside the cell.

B. The concentration of CO₂ will remain the same inside the cell.

C. The concentration of O₂ will remain the same outside the cell.

D. The concentration of CO₂ will decrease outside the cell.

Answers

Answer:

number one is the correct option

Melting gold with other metals makes 10-karat gold. Which term best describes 10-karat gold?
homogeneous mixture

compound

heterogeneous mixture

pure substance

Answers

Answer: a

Explanation:

Gold is known to be an element. The term that best describes 10-karat gold is that it is an homogeneous mixture.

Gold as an element of often has an ideal state of purity where there contains nothing but gold atoms.

A heterogeneous mixture is known to be a mixture that cannot be chemically sound everytime. Gold jewelry is known to be a homogeneous mixture as it is always will look good and remain unchanged for a long time.

As good example of homogeneous products, e.g  a 1-kilogram 24-karat gold bar has unique properties.

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which acid is part of the white coating on sour patch kids?

Answers

Tartaric acid is the white, powdery substance that coats tart candies such as Sour Patch Kids. COmbustion analysis of a 12.01g sample of tartaric aid, which contains carbon, hydrogen and oxygen, produces 14.08g CO2 and 4.32g

H2O.

i would know because i have see what there made of

Normal human sex cells have 23 chromosomes. Use the art to determine the number of chromosomes a sex cell may have if the nondisjuction occured during Meiosis I. Include all possible chromosome totals.

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Answer:

46.....................

HELP PLSS ASAP PLEASE

Answers

Answer:

5.24 x 10^23

Explanation:

Avogadro's constant is 6.02 x 10^23

1 mol = 6.02 x 10^23

0.87 mol = 6.02 x 10^23 x 0.87 = 5.24 x 10^23 (2.d.p)

The work you do on a machine is called the_________________

Answers

Answer:

THE WORK YOU DO ON A MACHINE IS CALLED WORK INPUT

The work you do on a machine is called the________.

Answer: Work In, Work Out: The work that you do on a machine is called work input. The work done by the machine on an object is called work output. means that less force will be needed for the same amount of work. Machines make work easier for you by changing the size or direction of the input force you supply.

So the answer would be input!

How do you determine the group and period of an element based on its electron configuration?

Answers

Answer:

If you are given with the atomic number of an element you can find it's period number and group number. The period number is related to the number of electron occupied shells in the element and the period number is linked to its valence electrons.

Explanation:

hope it helps luv <3

which particle diagram represents a sample of oxygen gas at stp

Answers

The diagram in image (4) in the image attached represents a sample of oxygen gas at stp.

Oxygen is a diatomic molecule, a diatomic molecule is a molecule that consists of only two atoms of the same element. In this case, the oxygen molecule consists of two oxygen atoms.

If we look at the diagram in the image attached very well, we will discover that the image in diagram (4) shows a molecule composed of two atoms of the same element and this fits exactly into the description of the oxygen molecule.

Learn more about diatomic molecules:

Particle diagram 4 represents the particles of oxygen at standard temperature and pressure.

A model of molecular (or diatomic) oxygen, which is made up of two oxygen atoms attached to each other through a covalent bond.

Dioxygen, also known as oxygen, is a naturally occurring molecule made up of two oxygen atoms that attach to each other with a strong covalent bond to form oxygen (dioxygen). Oxygen is sp3-hybridized, i.e. it has 4 sp3 hybrids. One of these hybrid orbitals overlaps with the s orbitals of hydrogen to create the O-h sigma bonds.

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The diagram in question is attached below.

What is the significance of cell division?
A. to make ATP
B. to prevent replication
C. to repair and replace other cells
D. to make glucose

Answers

The answer is c) to repair and replace other cells.

Cell division is the replication of cells by dividing itself into two, it does not prevent replication. Cell division does not make glucose either and cell division does not make ATP.

Find the mass in kilograms of the liquid air that is required to produce 600L of oxygen. In normal condition, 1L of liquid air has 1.3g​

Answers

Explanation:

1L is 1.3 g so 600L is 780 g

1kg= 1000g so

780 g = 0.78kg

I GUESS

Mass in kilograms of liquid air required = 0.78 kg

Given that

1 Litre of liquid air contains 1.3 grams of oxygen ( air )

Determine the amount of liquid air in Kg

volume of air given = 600 L

mass of liquid air required = x

1 litre = 1.3 grams

600 L =  x

∴ x ( mass of liquid air ) = 1.3 * 600

                                       = 780 g  = 0.78 kg

Hence we can conclude that Mass in kilograms of liquid air required = 0.78 kg

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What do Cl-35 and Cl-36 have in common?

Answers

Answer:

they have same atomic number as they are the same element & electrons

Answer: they both have the atomic (proton number) as they are the same element hence they also they have the same number of electrons. Therefore they have similar chemical properties, as the electrons determine the chemical property of an element.

Explanation: The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number (proton number ) as they are the same

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Which image shows in nonrenewable resource?

Answers

Answer:

1

Explanatio

right on edge

Among the given images, the one which is an example of non-renewable source of energy is image -1 the cooking gas is a petroleum product and it is non-renewable.

What are non-renewable energy sources?

Non-renewable energy sources are sources of energy that come from finite resources that cannot be replenished on a human timescale. They are called non-renewable because their reserves are being depleted faster than they can be replenished. These energy sources include:

Fossil fuels: Coal, oil, and natural gas are the three main types of fossil fuels. They are formed over millions of years from the remains of plants and animals that lived long ago. Fossil fuels are currently the most widely used sources of energy for electricity generation, transportation, and industrial processes.

Nuclear energy: Nuclear energy is produced through the process of nuclear fission, which involves splitting atoms of uranium or plutonium to release energy. Nuclear power plants generate electricity using this process.

Non-renewable energy sources are a major contributor to greenhouse gas emissions, which contribute to climate change. As a result, there is a growing need to transition to renewable energy sources that are sustainable and have a lower environmental impact.

Here, image 1 - cooking gas is non-renewable.

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Why can the grasses now grow when they couldn’t earlier?

Answers

Grasses can grow where they could not earlier because the soil conditions, water volume, or rate of sunlight have evolved.

Each species of plant requires specific conditions to thrive. These conditions include:

Nutrients from the soil.SunlightSpecific amount of water.

This implies that if the conditions for a specific species are not provided in terms of sunlight, radiation, and water, the plant will not grow in that specific zone. In the same way, if the conditions of a zone change and they are not suitable for a plant species the plant will grow even if this was not possible before.

This key idea is the reason why some plants including grasses can now grow in zones where they did not exist before. Some of the factors that have contributed to this are:

Fertilization: This provides soils with necessary nutrients.Climate change: This has affected climate patterns, and therefore it can increase or decrease radiation.Irrigation: This increases the amount of water available for plants.

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HELP WILL MARK BRAINLIEST
If an electrically charged plastic bag is placed close to an uncharged cloth, what will happen?

The charge of the bag will change.
The charge of the cloth will change.
The plastic bag will attract the cloth.
The plastic bag will repel the cloth.

Answers

Answer:the plastic bag will attract the cloth

Explanation:

Answer:

c

Explanation:

hope this helps

23.
What would happen to the substance in the jar if energy was added?

Answers

Answer:

it would explode

Explanation:

dont put that as an answer i need point for finals

how many atoms of mercury are in 50.15 g of mercury?

Answers

Answer:

please mark brainliest

Explanation:

The correct answer to this question is 0.2500 mol

Formula to calculate moles:

Moles = mass ÷ molar mass (n=m/M)

Mass = 50.15g

Atomic mass: 200.59 amu

Moles = 50.15g/200.59

= 0.2500 mol.

How many grams of copper would you need to produce 50.0g of silver? 1 Cu + 2 AgNO3 ----> 2 Ag + 1 Cu(NO3)2

Answers

cu-Mg is slivers d,jK

PLEASE HELP QUICK I NEED 14-16 (JUST 6 PROBLEMS) ANSWERED AND FULL WORK SHOWN FOR FACTOR LABEL METHOD ITS 100 POINTS AND I WILL MARK BRAINLYEST. ​

Answers

Answer:

14. 21.51 liters

15. 12.9 centimeters

16. 3400 milliliters

Explanation:

I don't really know how to show the work

What are some examples of a chemical change? (list more than 2 examples)

Answers

Cooking any food.

Burning of wood.

Digestion of food.

Acid-base reaction.

Chemical batteries, Digestion, Photosynthesis, Cooking food

What type of reaction takes place when using this enzyme (endergonic or exergonic)?
lactase is the enzyme

Answers

Answer:

we do the best possible in our

PLEASE help in the middle of a test: When table salt forms, which action occurs between the reacting elements?(1 point)

Answers

Answer:

don't know if this is what your looking for but it might be a NEUTRILIZATION REACTION.

Answer:

i think its sodium donates an electron to chlorine

Explanation:

which compound contains both ionic and covalent bonds

Answers

Answer:

Any compound that contains a metal ion and a polyatomic ion would work. Polyatomic ions are covalently bonded non-metals that have some overall charge. Examples of common polyatomic ions include OH⁻ (hydroxide), NH₄⁺ (ammonium), and NO₃⁻ (nitrate). So answers to this question can be something like KOH (potassium hydroxide), but really, anything works if it contains a metal ion and a polyatomic ion.

either elements or compounds which are present prior to a chemical reaction

Answers

Answer:

Do you mean the reactants? They are present prior to the reaction taking place. The products are the results of the reaction.

At room temperature, all the metalloids are solids, while most nonmetals are​

Answers

Answer:

at their own state.

That leaves only five elements: carbon, phosphorus, sulfur, selenium, and iodine, which are all non-metals and are solid at room temperature.

Write the shape of s and p-orbials.

Answers

s-orbitals are spherical, while p-orbitals are similar to a 3-D infinity symbol. I have attached an image of the comparison.

5 Stoichiometry Chemistry questions !



1. Determine the mass in grams of lithium hydroxide produced when 0.38 g of lithium nitride reacts. g LiOH

Li3N(s) + 3 H2O(l) --> NH3(g) + 3 LiOH(aq)


2. How many moles of sodium chloride are produced when 2.9 grams of sodium iodide reacts? mol NaCl

2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)


3. What volume in liters of chlorine gas at STP would be required to fully react with 125 g of NaI? L Cl2

2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)


4. Determine the volume in liters of carbon dioxide produced at STP when 0.85 grams of butane (C4H10) reacts. L CO2

2 C4H10(l) + 13 O2(g) --> 8 CO2(g) + 10 H2O(g)


5. Calculate the mass in grams of water vapor produced by the combustion of 51.3 L of propane, C3H8, at STP. g H2O

C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(g)

Answers

Yea yea that’s what I mean it just depends what the people like

electric current is passed through water, it decomposes inti hydrogen and oxygen. write full balanced chemical equation for the reaction​

Answers

Answer:

2H2O ------------------] 2H2 + O2

Which two elements have more protons per atom than phosphorus?​

Answers

Answer:

nitrogen have more protons per atom than phosphorus

Oxygen and fluorine are the two elements that have more protons per atom than the element phosphorus.

What is phosphorus?

Phosphorus (P), a nonmetallic chemical element of something like the nitrogen group (Group 15 [Va] of the periodic table), is a colorless, semitransparent, soft, sticky solid that glows in the dark at room temperature.

Hennig Brand, a German businessman with an interest in alchemy, appears to have discovered phosphorus around 1669. Brand left 50 buckets of pee alone till they putrified and "produced worms." He then reduced the urine to a paste and burned it with sand to extract elemental phosphorus first from combination.  Oxygen and fluorine are the two elements that have more protons per atom than phosphorus.

Therefore, oxygen and fluorine are the two elements that have more protons per atom than phosphorus.

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Fast pls due rn help fast pls

Answers

Answer:

Section a:

1. stratosphere

2. radio waves

3. nitrogen, oxygen

4. humidity

5. smoke, fog

Section b:

1. ozone layer

2. stratosphere

3. carbon dioxide (CO2)

4. smoke

5. tropical areas

Section c:

1. false, it is clear

Hope those help and are all correct

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