Bases are chemical compounds that can accept hydrogen ions (H+) when added to water. Bases have a pH higher than 7 on the pH scale. Common bases include baking soda (sodium bicarbonate), lye (sodium hydroxide), ammonia (NH3), and calcium hydroxide (CaOH2).
The Importance of Understanding Bases in Grade 7 ChemistryBases are an important concept to understand in Grade 7 Chemistry. They are chemical compounds that have a pH higher than 7 on the pH scale and are capable of accepting hydrogen ions (H+) when added to water. Knowing the basics of bases can help students in a variety of ways, from understanding the properties of solutions to being able to identify and use different bases in lab experiments.
To begin with, understanding the properties of bases is essential in order to properly identify and use them in experiments. Bases can be divided into two categories: alkalis and acids. Alkalis are bases that are soluble in water, while acids are bases that are insoluble in water. Each type of base has its own unique properties and uses. For example, baking soda (sodium bicarbonate) is a common alkali that can be used for baking, cleaning, and even as an antacid. Meanwhile, lye (sodium hydroxide) is an acid that is used in many industrial processes, such as soap and textiles manufacturing.
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3÷1 1/4
i need to know ASAP and i need to know how to do it
Answer:
2.4 or 2[tex]\frac{2}{5}[/tex]
Step-by-step explanation:
Let's set this up:
We have 3/1[tex]\frac{1}{4}[/tex]
That's also 3/1.25
For division, we don't divide if there is a fraction, so we move the decimal place over to the right for both the numbers
300/125
Then you long divide as normal:
And it's really hard to show how to long divide on a computer so I'm just going to go ahead and assume you know how to.
But the answer to that would be 2.4 or 2[tex]\frac{2}{5}[/tex]
Thank you, let me know if you have any questions.
solve each equation by substituting. y=-3x+5
5x-4y=-3
not different problems they are in the same problem
Answer:
(1, 2 )
Step-by-step explanation:
Given the 2 equations
y = - 3x + 5 → (1)
5x - 4y = - 3 → (2)
Substitute y = - 3x + 5 into (2)
5x - 4(- 3x + 5) = - 3 ← distribute and simplify left side
5x + 12x - 20 = - 3
17x - 20 = - 3 ( add 20 to both sides )
17x = 17 ( divide both sides by 17 )
x = 1
Substitute x = 1 into (1) for corresponding value of y
y = - 3(1) + 5 = - 3 + 5 = 2
solution is (1, 2 )
Answer:
x = 1 and y = 2
Step-by-step explanation:
y + 3x = 5 -------------> (1)
-4y + 5x = -3 -------------> (2)
(1) * 4
=> 4y + 12x = 20 --------> (3)
(3) + (2)
=> 0y + 17x = 17
=> 17x = 17
by dividing both sides by 17
=> x = 1
by putting x = 1 into (1)
=> y + 3*1 = 5
=> y + 3 = 5
=> y = 5 - 3
=> y = 2
PLEASE HELP!!! (i will give brainliest)
Step-by-step explanation:
[tex] {9}^{2} = {6}^{2} + {x}^{2} \\ 81 = 36 + {x}^{2} \\ {x}^{2} = 45 \\ x = 6.71 \: ft[/tex]
6.71 is answer ok plz MARK me as BRAINLIST
Evaluate the following expression when x = 5. -4x^2 + 3x + 12
Answer:
-73
Step-by-step explanation:
-4(5)^2+3(5)+12
5^2=25
25*-4=-100
-100+15+12=-73
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Answer:
im fanna join
Step-by-step explanation:
Which story shows 1/3 divided by 5?
why do countries, make alliances, in wartime? please someone help me!
Answer:
Most of the time, it is because they need the military aid or the resources that a certain country needs. That's kinda what the UN is all about is aiding each other in times of war
Step-by-step explanation:
Answer:
Because when make allies, they have someone to have their back.
Step-by-step explanation:
For example, If you're in a fight, you're gonna need backup. In war, you need as many people as you can to take down the villain (your opponent). Which means people, ammo, guns, bombs, support, and inside spies. All of this helps and will be easier to defeat the person per-say.
what is the equation?
Answer:
y=22x
Step-by-step explanation:
If x=1 and y=22 then y=22x
Solve 3(x - 2) < 18.
What is x?
Answer:
x < 8
Step-by-step explanation:
First you divide 18 by 3, which gives you 6.
x − 2 < 6
Then, you add 2 to 6, which gives you 8, which leaves you with :
x < 8
:)
Answer:
X<8
Step-by-step explanation:
Distribute the 3 to get 3x-6<18. Then add the 6 to 18 leaving 3x<24. Then divide 24 by 3 to leave x by itself. x<8
I hope this helped! :)
what is 146 / pi as a fraction
Answer:
Step-by-step explanation:
[tex]\frac{146}{\pi}\\ \\ \text{Pi is irrational and cannot be expressed as a ratio of two integers.}\\ \\ \frac{146}{\pi}\approx 46.47[/tex]
Triangle V P M. Angle V is 52 degrees, angle P is 78 degrees, angle M is x degrees.
Answer:
[tex]x = 50[/tex]
Step-by-step explanation:
[tex]52 + 78 + x = 180[/tex]
[tex]130 + x = 180[/tex]
[tex]x = 180 - 130[/tex]
[tex]x = 50[/tex]
Richard and Teo have a combined age of 49. Richard is 13 years older than twice Teo's age. How old are Richard and Teo?
Answer:
13×2=26
Maybe i can help u a little
Answer:
teo is 18 and Richard is 31
Step-by-step explanation:
hope it helps you
please mark me as brainlist
Safeway has ginger ale on sale at 12 cans for $4.00 and Giant has the same brand
of ginger ale on sale for 20 cans for $6.00. Which store has the better deal?
Answer:
Giant
Step-by-step explanation:
Giant: .30c a can
Safeway: .33c a can
Find the missing side length
Answer:
b
Step-by-step explanation:
Mark has $500 in his savings account. If he saves $25 each month, how many months will it take him to have $1000.
Answer: 20, I believe
Step-by-step explanation: You already have 500 which is half of 1000. 500 divided by 25 equals 20.
Is 1,48 rational or irrational
Answer:This number is classified as rational
Step-by-step explanation: Have a great day!
what is the value of x in the triangle??
Answer:
x=40°
Step-by-step explanation:
Every triangles area equals 180
75+65=140
180-140=40
Answer:
40
Step-by-step explanation:
All angles in a triangle add up to 180°.
65° + 75° + x° = 180
140° + x° = 180°
-140 -140
x° = 40°
will give brainliest at the right answer
Answer:
1.) 40.0 2.) 75.00 3.) 140.00 4.) 200.00 5.) 500.00 6.) 1300.00 7.) 70.0000
8.) 10.00 9.) 245.00 10.) 900.00
A. Linear
B. Exponential
C. Neither
Bella went to Yard Depot multiple times. Each time she was there, Bella bought a gardening hat and y pairs of gardening gloves. The expression shown below represents the total amount of money, in dollars, Bella spent at Yard Depot. a(by + c) C. Explain what a, b, and c each mean in terms of the situation.
Answer:
a is how many times bella went 2 yard depot
b is how many gardening gloves she bought
c is how many gardening hats she bought
If a circle has an area of 49 squared, what is its exact radius?
Answer:
27.7
Step-by-step explanation:
Area = πr²
49²/π = r²
r = 49/√π = 49/1.77 = 27.7
help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Option C it is sure
,
A
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what is the range for a x intercept of (5,0) and a y intercept of (0,3)
Answer:
(5,0)=x1,y1
(0,3)=x2,y2
so the range will be x1-x2/
Write an equation for the following line.
10
-10
10
-101
Pleasee help wit this
Answer:
Step-by-step explanation:
f(-9)=2(-9)²+5(-9)+20
= 162-45+20
= 137
Answer:
137
Step-by-step explanation:
f(-9) = 2(-9)^2 + 5(-9) + 20
= 162 - 45 + 20
= 137
Select the correct answer.
Identify the expression equivalent to 4(x + x + 7) - 2x+8 - 4 by substituting x = 1 and x = 2.
ОА.
6x +11
OB. 3(x + 7)
OC. 2(3x + 16)
OD.
3x + 16
Reset
Next
Answer:
c
Step-by-step explanation:
The expression equivalent to this expression is 2(3x+16)
Data;
x = 1x = 2Equivalent ExpressionThe given expression is 4(x+x+7) -2x + 8 -4
Let's simplify this
[tex]4(x+x+7) -2x +8 - 4\\4(2x+7) -2x +4 = 8x + 28 - 2x + 4 = 6x + 32[/tex]
This can be simplified as
[tex]6x+ 32 = 2(3x + 16)[/tex]
The expression equivalent to this expression is 2(3x+16)
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What is - 1 1/15 + (- 3/5) =
2 It is 7:40 A.M. Delilah's bus arrives
at 7:53 A.M. It takes her 10 minutes
to get to the bus stop. Will she
catch her bus?
yourloos nosos 3 sovios
to
no 18119
What time will she get to the bus
stop?
9
SRB
Answer:
no she will be 3 min late
Step-by-step explanation:
(07.02)
How many solutions can be found for the equation 4x+5=10?
A. Zero
B.One
C. Two
D.Infinitely Many
4(x - 9) plz answer quickly
Answer:
4x - 36
Step-by-step explanation: