how many grams are in 1.35 moles of NH3

Answer:a scientist would choose to conduct a controlled experiment when it has all the necessary precautions and has the equipment to do so

Explanation:thank you

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Answer:

0.2491

Explanation:

1mole of a gas contains 6.02 × 10²³molecules

x moles will contain 3.408 × 10²¹

x = 1 × 3.408 × 10²¹/ 6.02 × 10²³

= 5.66 × 10^-3moles

Mole = mass/ molar mass

mass = Mole × molar mass

= 5.66 × 10^-3 × 44.01

= 249.0966 × 10^-3

= 0.2490966

to 4 decimal places = 0.2491

Answer:

Cis-2-pentene or Z-2-pentene

Answer:

d. 10

Explanation:

The 24 means the atomic mass and twelve means the number of electrons. You subtract the number of electrons from the atomic mass. 24-12=12

Then, since there's +2, you subtract 2 from 12 which equals 10 which means there are 10 electrons now.

The confusing thing is that + means subtract and - means add here.

Hope this helps.

Answer:it is wrong answer

Explanation:estro man

Answer:

see below

Explanation:

1- lattice

2- regular

3- positive

4- negative

5- alternate

6- strong

7- bonds

8- giant

Answer:

Periodicity is caused by regular and predictable variations in element atomic structure. ... The rows in the periodic table (the periods) reflect the filling of electrons shells around the nucleus, so when a new row begins, the elements stack on top of each other with similar please help me rank up

Periodicity means the repeating trends in properties of elements in a regular interval.  Precocity in chemical properties depends on the atomic structure because, the size, number of electrons, etc affects their reactivity.

Periodicity is the repetition in in trends in properties after a regular interval. In periodic table, all the elements are classified into different groups and periods.

Groups are vertical columns containing elements of same number of valence electrons and similar chemical and physical properties. Periods are horizontal rows where elements are arranges in the increasing order of atomic number.

Along a period the atomic size decreases, ionization energy and electronegativity increases. But down a group just the reverse for this happens.

In a chemical reaction only valence electrons are participating and the size and number of valence electrons etc affects the chemical reactivity of elements. That's why it is said like periodicity in chemical properties is based on the atomic structure.

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Here you go

Mg + 2CuNO3 → Mg(NO3)2 + 2Cu

Answer:

u should go to gathmath

Explanation:

it's alot better

Answer:

[tex]\left[\begin{array}{cc}Oak\ Leaves&Decrease\\Caterpillar&Decrease\\Blue\ Jay&Decrease\end{array}\right][/tex]

Because the fungus is killing the oak leaves, the caterpillars will have less food and die out, resulting in a decrease in blue jay populations.

Hope it helps :) and let me know if you want me to elaborate.

Answer:

2K + 2H2O → 2KOH + H2

So Hydrogen is more reactive than pottasium .

Answer:

A

Explanation:

Hydrogen is more reactive than potassium.

Answer:

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products

Answer:

Explanation:

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products.

The quantity of β-hydroxybutyrate the bear can produce

during hibernation is 3,073.30grams.

Hibernation is defined as the period of less activity by animals to conserve energy to survive coarse weather conditions.

A typical example of an animal that hibernates is the bear.

From the question, a bear is able to accumulate 25kg (25000grams) of triglyceride.

To calculate quantity of β-hydroxybutyrate that would be produced from 25kg triglyceride;

846g of triglyceride = 104grams of β-hydroxybutyrate

25000g of triglyceride = x grams

(Cross multiple to solve for x grams)

X = 104 × 25000/846

[tex]x = \frac{104 \times 25000}{846} [/tex]

[tex]x = \frac{2600000}{846} [/tex]

[tex]x = 3073.30grams[/tex]

Therefore, the quantity of β-hydroxybutyrate the bear can produce during hibernation is 3,073.30grams.

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We can describe a positive energetic process as any process which increases the internal energy of the system.

A positive energetic reaction or process is often referred to as being Endothermic. This means that the system which is performing the process absorbs energy. Some examples include:

etc

Therefore, we can confirm that a positive energetic process is one in which the system in question absorbs energy, thus increasing its internal energy.

Since I could not locate the options online, I have provided a general explanation of the concept coupled with a few examples.

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Answer:

C2Br6

because bromine is a liquid volatile

According to the forces of attraction and boiling point C₂Br₆ is most volatile as its boiling point is very low.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer: The particles are spread apart and can move freely.

Answer:

4×10^-23g

Explanation:

Given atomic mass of Mg = 24g

To find mass of 1Mg = ?

So its fix that the atomic mass of Mg 24 g is 6.022×10^23

Then the Atomic mass of 1 Mg atom is = 24 ÷ 6.022×10^23

= 4×10^-23 g

Answer:

B

Explanation:

actin and reaction force are equal Newton 3 law

The mole fraction of methanol in the mixture is 0.444

We'll begin by calculating the number of mole of water.

Mole = mass / molar mass

Mole of water = 45 / 18

Mole of water = 2.5 moles

Finally, we shall determine the mole fraction of methanol.

Mole fraction of methanol =?

Mole fraction = mole / total mole

Mole fraction of methanol = 2 / 4.5

Mole fraction of methanol = 0.444

Thus, the mole fraction of methanol is 0.444

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The balanced dissociation equation for Cs₂CO₃ is:

Cs₂CO₃(aq) —> Cs⁺(aq) + CO₃²¯(aq)

A dissociation equation is an equation showing the available ions present in a solution.

To obtain the dissociation equation, the compound must be dissolved in water to produce an aqueous solution.

The dissociation equation for Cs₂CO₃ can be written as follow

Cs₂CO₃(aq) —> Cs⁺(aq) + CO₃²¯(aq)

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Answer:

A life cycle is the sequence of stages an organisms goes through from one generation to the next. Organisms that reproduce sexually can have different types of life cycles, such as haploid or diploid life cycles.

Answer:

1. melting

2boiling

3. freezing

4. condesation

Explanation:

Answer:

54,000 seconds

Explanation:

seconds in 1 hr = 3600

secs in 15 hrs = 3600×15

→ 54000

Answer:

A. Draw a conclusion

Explanation:

correct me if I'm wrong :>