I can't understand this I need it done by 4:20​

Answer:

yes

Explanation:

The outermost shell of sodium contain only one electron . Due to incomplete octet (8electron in outermost shell ) sodium atom is unstable. Now the outermost shell of of Na+ contain 8 electron . due to completion of octate , Na+ is more stable

Answer:

Answer:

B) Lithium ions have 1 positive charge, and phosphorus ions have 3 negative charges.

Explanation:

Lithium phosphide is an ionic compound in which lithium ions have 1 positive charge, and phosphorus ions have 3 negative charges. Therefore, option A is correct.

An ionic compound is a type of chemical compound that is composed of ions held together by electrostatic forces of attraction. These compounds are typically formed through the transfer of electrons between atoms, resulting in the formation of positively charged cations and negatively charged anions.

Ionic compounds often form crystal lattice structures due to the strong electrostatic forces between the ions. They tend to have high melting and boiling points.

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Answer:

Activation of the ring towards substitution: NH2, OCOCH3

Withdrawal of electrons through resonance. COOH, SO3H

Explanation:

During electrophilic substitution, certain substituents may activate or deactivate the benzene ring.

Substitients that activate or deactivate the benzene ring may do so via resonance or inductive effect.

Groups such as -NH2 and OCOCH3 activate the ring via resonance while groups such as -SO3H and -COOH deactivate the ring via resonance.

Answer:

C - Secure

Explanation:

Edg 2020

Anxious-Ambivalent attachment is displayed when a child actively explores the environment but seeks out the caregiver for comfort or reassurance.  

• The form of attachment when children seem to distrust caregivers, and this insecurity usually signifies that their surroundings is explored with trepidation rather than excitement is known as Anxious-Ambivalent attachment.  

• In this form of attachment, children continuously look for approval from their caregivers and spontaneously observe their environments for fear of being abandoned.  

• The children developing under this form of attachment style, seem to carry what they have acquired into adulthood, and usually feel unloved by their partners.  

Thus, the given case is of Anxious-Ambivalent attachment.

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Answer:

The longest-running show in Broadway history officially opened on January 26, 1988 and is still playing at the Majestic The Andrew Lloyd Webber musical won 7 1988 Tony Awards including Best Musical.

Explanation:

Brainliest plz?

Answer: the answer is B, C, and D

Explanation:

Answer:

-Do not throw around any of the athletic equipment used in this exercise.

-Be careful not to spill when transferring water from the water displacement procedure; this could cause people to slip and fall.

-Check containers, such as beakers, graduated cylinders, and buckets, for cracks or chips prior to use.

Explanation:

hope it helps! correct on edge :)

Answer:

Barium (Ba)

Explanation:

Answer:

Ba, or Barium

Explanation:

Alkaline Earth Metals are in the 2nd group of the Periodic Table.

Be

Mg

Ca

Sr

Ba

Ra

These are the Alkaline Earth metals. They start on Period 2:

Period 2 - Be

Period 3- Mg

Period 4 - Ca

Period 5 - Sr

Period 6 - Ba

Period 7 - Ra

Answer:

A

Explanation:

Water freezing and thawing involves no chemical change.  It has a chemical formula of H2O whether it is ice or water.

Answer:

PLANT CELLS- have cholorplasts, always have cell walls

Animal cellss- never have. Acell wall

Bacteria cells - are projaryotic sometimes have cell walls. Have nucleiod

Explanation:

The photosynthetic pigment chlorophyll is found in the chloroplast, an organelle that uses sunlight to produce energy and release oxygen from water. Organelles found in plant cells called chloroplasts use the photosynthetic process to change light energy into relatively stable chemical energy.

Plant cells are eukaryotic cells with a genuine nucleus and particular organelles to carry out particular tasks. Plant cells do, however, include several organelles that are unique from those seen in other eukaryotic cells.

An animal cell is a type of cell that is only found in animal tissues, as the name suggests. It is distinguished by having cell organelles that are encapsulated inside the cell membrane but without a cell wall.

PLANT CELLS- have chloroplasts, always have cell walls

Animal cells- never have. Acell wall

Bacteria cells - are prokaryotic and sometimes have cell walls. Have nucleoid

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Answer:

Solid : The intermolecular space is very less

Liquid : The intermolecular space is fairly more than in solids

Solid : It has a fixed shape

Liquid : It has a fixed volume but shape changes according to where it is placed

Solid : eg : Books

Liquid : eg : water

If my answer helped, kindly mark me as the brainliest!!

Thank You!!

Answer:

Liquids have the following characteristics:

No definite shape (takes the shape of its container).

Has definite volume.

Particles are free to move over each other, but are still attracted to each other

Explanation:

ye

Answer:

the answer is ionic

Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom. ... The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion (anion). A brief treatment of ionic bonds follows

Answer:

[tex]\Delta p=-2.60bar\\ \\\Delta p=-0.260MPa[/tex]

Explanation:

Hello,

In this case, by using the Bernoulli equation:

[tex]p_1+\frac{1}{2}\rho v^2_1+\rho gh_1= p_2+\frac{1}{2}\rho v^2_2+\rho gh_2+\rho h_L[/tex]

Whereas [tex]h_L[/tex] accounts for the heat loss, so we can compute the change of pressure by:

[tex]p_1 +\frac{1}{2}\rho v^2_1+\rho gh_1= p_2+\frac{1}{2}\rho v^2_2+\rho gh_2+\rho h_L\\\\p_2-p_1=\frac{1}{2}\rho v^2_1+\rho gh_1-\frac{1}{2}\rho v^2_2-\rho gh_2-\rho h_L\\\\\Delta p=\rho *[\frac{1}{2}(v_1^2-v_2^2)+g(h_1-h_2)-h_L ][/tex]

Thus, we must first compute the velocity inside the 5-cm section by using the continuity equation:

[tex]v_2=v_1\frac{A_1}{A_2}=v_1*(\frac{\pi d_1^2/4}{\pi d_2^2/4} ) \\\\v_2=1.2m/s*\frac{8cm}{5cm}=1.92m/s[/tex]

It means that the change in pressure in Pa turns out (density is 1500 kg/m³ given the specific gravity of the fluid):

[tex]\Delta p=1500\frac{kg}{m^3} *[\frac{1}{2}((1.2\frac{m}{s})^2-(1.92\frac{m}{s})^2)+9.8m/s^2(0m-15.0m)-25\frac{m^2}{s^2} ]\\\\\Delta p=1500\frac{kg}{m^3}*(-1.1232\frac{m^2}{s^2} -147\frac{m^2}{s^2} -25\frac{m^2}{s^2} )\\\\\Delta p=-259684.8Pa[/tex]

Therefore, the change in pressure in bar and MPa turns out:

[tex]\Delta p=-259684.8Pa*\frac{1bar}{1x10^5Pa}=-2.60bar\\ \\\Delta p=-259684.8Pa*\frac{1MPa}{1x10^6Pa}=-0.260MPa[/tex]

Such negative sign means that the pressure at the 5-cm section is lower than the pressure at the 8-cm section.

Best regards.

Answer:

The correct answer is 4.5 g/mL.

Explanation:

To find the density, we must remember the formula for density, which is given by the following:

density = mass/volume

In this case, we are given both the mass and the volume, so we just need to plug in these values into the formula to solve for the density.  This is modeled below:

density = mass/volume

density = 2344 g/520 mL

density = 4.5 g/mL

Therefore, the correct answer is 4.5 g/mL (notice that the units for our answer match what is being asked for in the problem).

Hope this helps!

Answer:

It will take Marvelous 160 miles per hour east to travel 21 miles.

Explanation:

Because 21 times 6= 160 and make sure to add the per hour east because thats the velocity.

Answer:

Water

Explanation:

When a salt solution is heated, the solvent (assumedly water) will evaporate at a greater rate because the water molecules have greater energy.

Answer:

-1

Explanation:

Electrons have a negative charge, so when you add an electron to an element their charge goes down by 1.

Answer:

Option C is correct = fluorine

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

This diagram show that there are 9 electrons and 9 protons are present. We know that the number of protons or electrons are atomic number of that element. From periodic table we know that atomic number of fluorine is 9 thus the given atom present fluorine atom.

Answer:

10

[tex] \frac{2.0.10(410)}{8.0.10( - 240)} = \frac{10(650)}{40} [/tex]

Explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

#proudtobeanndian

.......

Answer:

well 4.2 times 10 is 42 and 6.1 times 10 is 61

Explanation:

Answer:

Option A is correct.

Explanation:

Given data:

Mass of ammonia = 1.6 g

Volume of water = 147 mL

Concentration in ppm = ?

Solution:

As we know that,

1 g/mL = 1000000 ppm

1.6 g/147 mL = 0.011 g/mL

Now we will convert the 0.011 g/mL into ppm.

0.011 × 1000000 = 11000 ppm

In scientific notation:

1.1×10⁴ ppm

Thus, option A is correct.

Answer:

Empirical formula of compound  is C₄H₈O

Explanation:

Given data:

Mass of compound = 5.60 g

Mass of CO₂ = 13.7 g

Mass of H₂O = 5.60 g

Empirical formula of compound = ?

Solution:

Percentage of C:

13.7 g/5.60 g × 12/44× 100

2.45×0.273× 100 = 66.9%

Percentage of H:

5.60 g/ 5.60 g × 2.016/18 × 100

11.2%

Percentage of O:

(66.9% + 11.2%) - 100 = 21.9%

Grams atom of  C , H, O

66.9/12 = 5.6

11.2 / 1.008 = 11.11

21.9 / 16 = 1.4

Atomic ratio:

           C                 :               H           :              O

           5.6/1.4         :            11.11/1.4    :            1.4/1.4

              4                :               8            :               1

Empirical formula:

C₄H₈O

Answer:

D = 2 g/cm³

Explanation:

Density = mass over volume

D = m/v

Step 1: Define

m = 4 grams

v = 2 cm³

Step 2: Substitute and Evaluate

D = 4 g/2 cm³

D = 2 g/cm³

Answer:

false

Explanation: