Can someone pls help me with this its due in 20 minutes.

Answer:

there'd be 2 electrons

Explanation:

number of electrons= number of protons

Answer:

Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium.

Answer:

Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium.

Explanation:

I got the answer first

Answer:

This is a mixture.

Explanation:

While you can no longer see the salt when it's dissolved, it's still there! It's just in tiny, tiny, invisible to the eye molecules. It's now a mixture of H20 molecules and NaCl molecules in a solution :)

The water doesn't bond to the salt, so it's not a compound.

It's not just one element, it's a mixture of many!

It's not a pure substance since it's NaCl AND H2O.

Answer:

this is the answer okkkkkkkkkkkkkkkk

Answer:

tin

Explanation:

since it takes less heat to change it will warm up and produce thermal energy sooner than carbon

2 kg of carbon at 50°C will provide more thermal energy than 2 kg of tin at the same temperature.

To determine which substance will provide more thermal energy, we need to calculate the thermal energy for both scenarios using the formula:

Thermal energy = mass * specific heat * temperature change

For 2 kg of tin at 50°C:

Thermal energy = 2 kg * 230 J/kg°C * (50°C - 0°C) = 23,000 J

For 2 kg of carbon at 50°C:

Thermal energy = 2 kg * 709 J/kg°C * (50°C - 0°C) = 70,900 J

Therefore, 2 kg of carbon at 50°C will provide more thermal energy than 2 kg of tin at the same temperature. This is because carbon has a higher specific heat (709 J/kg°C) compared to tin (230 J/kg°C), meaning it requires more energy to raise the temperature of carbon compared to tin. As a result, carbon can store and release more thermal energy than tin at the same temperature and mass.

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Answer:

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Explanation:

Answer:

the plate gets warmer and the cake gets colder

Explanation:

my brain

Answer: ummmmmm hmmmmm

Explanation:

Answer:

Anhydrous sodium carbonate is stable to heat and does not decompose even when it is heated to redness. This is because sodium carbonate salt on heating with acids react to release carbon dioxide.

Answer:

it's either B. or C.. hope this helps!

Explanation:

Answer:

D. A bus moves on a straight road and then  makes a right turn.

Explanation:

Acceleration is a change in direction or speed. All of the other examples involve straight lines or constant speed.

Answer:

i going to be aniston i would say take a gess

The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. The concentration of OH⁻ is 1 × 10⁻⁴ M.

The pOH expresses the hydroxide ion concentration of a solution. The pOH of a solution is defined as the negative logarithm to the base 10 of the value of the hydroxide ion concentration in moles per litre.

The equation used to calculate the concentration of OH⁻ is:

pOH = -log [OH⁻]

[OH⁻] = 10⁻pOH

[OH⁻] = 10⁻⁴

= 0.0001 M

The number of significant figures in a reported value is the number of digits that are known with certainty plus the last one having some uncertainty.

Here 0.0001 contains 3 significant figures. In scientific notation it can be represented as 1 × 10⁻⁴ M.

Thus the concentration of [OH⁻] is 1 × 10⁻⁴ M.

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Answer:

it is the moisture in the air

Explanation:

if we buy a dehumidephire we see that it collets water from the air

Answer:

Humidity describes the amount of water vapor or water molecules in the air. Weather scientists use the term “relative humidity,” which Joe Sobel, a meteorologist and senior vice president at Accuweather described as “a comparison of the amount of moisture in the air versus the amount of moisture the air could hold.”

Explanation:

Explanation:

it is an spiral as it are rounded so

It is a spiral type of galaxy.

Explanation:

H2O, what is the maximum amount of H2O which could be formed from 10.9 g of H2 and 16.03 g ofO2? Answer in units of g. ... 0.500 mol O2 x 2 mol H2O / 1 mol O2 x 18 g H2O/mol H2O = answer in ..

Answer:

40%

Explanation:

hope this helps!!!!

Answer:

NO

Explanation:

NO NO NO

i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)

Answer:

3_ethylpentane

4_ethylheptane

1_pentene

3_hexene

Answer:

2.3 X 10^24 atoms CO2

Explanation:

Answer:

2.30 x10²⁴ molecules CO2

Explanation:

Convert mass of CO2 to moles

Convert moles of CO2 to molecules using Avogadro's number.

168.2 g CO2 x 1 mole CO2 / 44 g CO2 x 6.022 x10²³ molecules CO2 / 1 mole CO2

= 2.30 x10²⁴ molecules CO2

Explanation:

➢number of moles. Moles and Chemical Reactions. Chapter 4. 3 H2. + N2. →. 2 NH3 ... How many grams of NH3 would form if 2.11 moles of N2 reacted with ...

Answer:

B.

Explanation:

Most species that have lived on Earth are now extinct

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A P E X

The statement that best explains why so many fossils look different from the millions of species currently living on Earth is: B. Most species that have lived on earth are now extinct.

The fossil record is evidence that life on Earth has changed over time, with new species evolving and old ones going extinct. It shows the wide range of life that existed throughout Earth's history, including many species that no longer exist today.

The diversity of fossils is primarily due to the extensive range of species that have lived and gone extinct throughout the history of life on Earth.

Although some fossils may have changed over time or contain inaccuracies, they are still crucial for understanding the evolutionary relationships among different species.

Hence, option B is correct.

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Answer:

78

Explanation:

Answer:

oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

Explanation:

the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

Answer:

The answer to your question is: 71 g of Chlorine

Explanation:

Na = 46 g

Cl = ?

NaCl = 117 g

Equation

                     2 Na     +     Cl₂   ⇒   2 NaCl          

                     46g              X              117g

If we consider the law of conservation of matter, we know that the mass of the reactants equals the mass of the products, then

                   mass Na + mass Cl₂  = mass NaCl

                    46 g + X = 117

                    X = 117 - 46

                   x = 71 g of Chlorine        

nuclear energy originates from the splitting of urinal atoms a process called fish and degeneracy to produce steam which is used by a turbine generator to generate electricity.

Answer:

B C4H10 will be the empirical formulae.