1. Identify the reactants and the products in the following equation. (1 point)

CaO + CO2 → CaCO3
2. Show the molecular formula and electron structure of the simplest compound that forms with only carbon and hydrogen atoms. (1 point)
3. For each equation, state the reaction type and then balance the equation. (2 points)
a. ___Na3PO4 + ___HCl → ___H3PO4 + ___NaCl
b. ___KClO3 → ___KCl + ___O2
4. You have knowledge of the outermost electron states of the atoms, trends in the periodic table, and the patterns of chemical properties. Use that knowledge to predict the products of each of the following equations. Then explain how you made your predictions. Be sure to balance the equations. (4 points)
a. ___NaBr + ___Ca → _______ + _______
b. ___Mg + ___O2 → _______
5. Identify the products of this single-replacement reaction between sulfuric acid and aluminum. Then balance the equation. (2 points)

___H2SO4 + ___Al → ___ + ___
6. (6 points)
a. Write a balanced equation for the model of a chemical reaction shown below. (The white balls represent hydrogen atoms, the black balls represent carbon atoms, and the gray balls represent oxygen atoms.) Then complete the table with information about the atoms and molecules represented in the model. Show your work. (5 points)
chemical equation
Molecule name Methane Oxygen Water Carbon dioxide
Molecular formula
H2O
Elements in molecule
C, O
Molecular mass of molecule 16.05 g/mol
Total mass in reaction
64.00 g
Total mass of all reactant molecules
Total number of reactant atoms
Total mass of product molecules
Total number of product atoms
b. How does your second table support the claim that the number of atoms — and therefore mass — is conserved during a chemical reaction? (1 point)
7. (6 points)
a. Calculate the molar mass of sucrose: C12H22O11. Show your work. (2 points)
b. Calculate the molar mass of glucose, one of the products of photosynthesis: C6H12O6. Show your work. (2 points)
c. How many molecules are in 1 mole of sucrose? (1 point)
d. How many atoms are in 1 mole of sucrose? (1 point)
8. Baking soda (NaHCO3) and vinegar (HC2H3O2) react to form sodium acetate, water, and carbon dioxide. If 42.00 g of baking soda react, how many moles of carbon dioxide will form? Show your work. (3 points)
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2

Answer:

m = 50

Step-by-step explanation:

∠ D and ∠ A are vertically opposite angles and are congruent , then

m - 130 = 20 - 2m ( add 2m to both sides )

3m - 130 = 20 ( add 130 to both sides )

3m = 150 ( divide both sides by 3 )

m = 50

Answer:Chi-square is a nonparametric statistical procedure for nominal data.

Step-by-step explanation:

Answer:

(x, y ) → (x + 5, y - 3 )

Step-by-step explanation:

5 units right means add 5 to the x- coordinate

3 units down means subtract 3 from the y- coordinate

the translation rule is

(x, y ) → (x + 5, y - 3 )

The shapes in the composite figures are a triangle and a trapezoid

The area of the figure is about 24 square units

The dimensions of the figure are given as:

Triangle

Trapezoid

The longer base of the trapezoid and the base of the triangle are aligned.

So, the area is:

Area = Area of triangle + Area of trapezoid

This gives

Area = 0.5 * base * height + 0.5 * (sum of bases) * height

So, we have:

Area = 0.5 * 6 * 3  + 0.5 * (4 + 6) * 3

Evaluate

Area = 24

The figure is needed to determine the perimeter

Hence, the area of the figure is about 24 square units

Read more about composite figures at:

https://brainly.com/question/21135654

Answer:

47.3

Step-by-step explanation:

yes

Answer:

C.5, Because when you you add the line of best fit on the graph it goes through the 5 point right over 4 wins won last year.

Answer:

d = 19 cm

Step-by-step explanation:

Circumference of circle = πd

πd = 19π

 d = 19π ÷ π

 d = 19 cm

d=19 cm

Hope it helps.

Do comment if you have any query.

Christopher is solving a system of equations that has one solution and can be seen in Option C.

A system of equations is more than one equation that can be solved together to get a unique solution. In this situation, the power of the equation must be in one degree.

A quadratic equation is an algebraic equation whose power is raised to the second degree.

However, if their power is not in one degree, they are regarded as a quadratic equation and it usually produces two solutions.

From the given options, we can see that only option c is not a quadratic equation, Hence, it is the right answer.

Learn more about systems of equations here;
https://brainly.com/question/14323743

Answer:

  1

Step-by-step explanation:

There are a couple of identities that come into play here:

  a³ -b³ = (a -b)(a² +ab +b²)

  (x^a)/(x^b) = x^(a-b)

  (x^a)^b = x^(ab)

  (x^a)(x^b) = x^(a+b)

_____

These mean we can simplify the expression as follows.

  [tex]\left(\dfrac{x^{a}}{x^{b}}\right)^{a^2+ab+b^2}\times\left(\dfrac{x^{b}}{x^{c}}\right)^{b^2+bc+c^2}\times\left(\dfrac{x^{c}}{x^{a}}\right)^{c^2+ca+a^2}\\\\=x^{(a-b)(a^2+ab+b^2)}\times x^{(b-c)(b^2+bc+c^2)}\times x^{(c-a)(c^2+ca+a^2)}\\\\=x^{a^3-b^3}\times x^{b^3-c^3}\times x^{c^3-a^3}=x^{(a^3+b^3+c^3)-(a^3+b^3+c^3)}\\\\=x^0=\boxed{1}[/tex]

The expression has a value of 1.

__

Additional comment

For certain values of x and the exponents, the individual factors may exceed the ability of a calculator to express the value. That is, an attempt at numerical evaluation of this may produce a result different from 1. In any event, the expression is undefined for x=0.

Answer:

y = 4

Step-by-step explanation:

2(4y - 9) = 14

8y - 18 = 14

8y = 32

y = 4

Answer:

y = 4

Step-by-step explanation:

Simplifying

2[4y + -9] = 14

Reorder the terms:

2[-9 + 4y] = 14

[-9 * 2 + 4y * 2] = 14

[-18 + 8y] = 14

Solving

-18 + 8y = 14

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '18' to each side of the equation.

-18 + 18 + 8y = 14 + 18

Combine like terms: -18 + 18 = 0

0 + 8y = 14 + 18

8y = 14 + 18

Combine like terms: 14 + 18 = 32

8y = 32

Divide each side by '8'.

y = 4

Answer:

17 feet

Step-by-step explanation:

Since a square has 4 sides, you have to do 68 / 4 to find one of the sides.

68/4 = 17

And to check, if you add up all sides...

17+17+17+17 = 68

Answer:

a

Step-by-step explanation:

pigs are 75 bpm more than elephants

so elephants are x + 75

and pigs are 100 bpm

so this means your answer is a

Answer: x < 8

P/s: if -1.x > -a => x < -a/-1

Ok done. Thank to me >:3

[tex] - 6x \: + \: 18 \: > \: - 30[/tex]

[tex] - 6x \: > \: - 30 \: - \: 18[/tex]

[tex] - 6x \: > \: - 48[/tex]

[tex] \boxed{x \: < \: 8}[/tex]

[tex] \text{D.} \: \boxed{ \bold{x \: < \: 8}}[/tex]

Answer:

-8/15, -2/15, 1/5, 4/15 and 2/3.

Step-by-step explanation:

-3/5 = -9/15 and 5/3 = 25/15

So 5 rational numbers between these 2 values

=   -8/15, -2/15, 3/15, 4/15 and 10/15

= -8/15, -2/15, 1/5, 4/15 and 2/3.

Answer:

I guess, as long as this is an act of kindness. Thanks?

Answer:

x=7

Step-by-step explanation:

Solution of your latest question

because i can't get any answer option there ....so posting it heree .....

hope you get it before it got deleted

Each cross section has a diameter equal the horizontal distance between the two "halves" of the parabola. We have

y = 4x²   ⇒   x = ±√y/2

so the diameter for some given y would be √y/2 - (-√y/2) = √y.

The volume of a cross section with thickness ∆y is then

π/2 (√y/2)² ∆y = π/8 y ∆y

The total volume of the solid would then be

[tex]\displaystyle \int_0^4 \frac\pi8 y \, dy = \frac\pi8 \times \frac12 y^2 \bigg|_{y=0}^{y=4} = \boxed{\pi}[/tex]

Answer:

x = 3 ± [tex]\sqrt{5}[/tex]

Step-by-step explanation:

(x - 3)² = 5 ( take square root of both sides )

x - 3 = ± [tex]\sqrt{5}[/tex] ( add 3 to both sides )

x = 3 ± [tex]\sqrt{5}[/tex]

Answer:

×=5.5

Step-by-step explanation:

exact form would be 11/5

and mixed form is 5 1/2

Answer:

```30.

<30`

<98

<`36ok this is your answer....

Using the Fundamental Counting Theorem, it is found that there are 90 ways to choose the three side dishes.

It is a theorem that states that if there are n things, each with [tex]n_1, n_2, \cdots, n_n[/tex] ways to be done, each thing independent of the other, the number of ways they can be done is:

[tex]N = n_1 \times n_2 \times \cdots \times n_n[/tex]

In this problem:

Then:

N = 5 x 3 x 6 = 90.

There are 90 ways to choose the three side dishes.

More can be learned about the Fundamental Counting Theorem at https://brainly.com/question/24314866

Answer:

I'm pretty sure it's C.

Step-by-step explanation:

Answer:

The greatest common factor of 12xy^5 + 60x^4y^2 – 24x^3y^3 is 12xy²

Answer:

B

Step-by-step explanation:

For percentage, you take the percent symbol and move it two spaces to the left and make it a decimal, hence the .32 and then you multiply it by the integer you want to find the percent of, 130.

Answer:

0.32 x 130

Step-by-step explanation:

A percentage is out of 100;

32% = 32/100

32/100 = 0.32

32% of 130 is a multiplication problem (of : multiplication).

0.32 x 130 = 41.6

Answer:

25/2 = 12.5 32/2= 16 82/2= 41 16/2=8 64/2= 32

Step-by-step explanation:

If corect please give branlieist

Answer:1/2 problability for both odd and same for evens.1/8 chance of spinning a 3 .25% chance of a 4 or 6.one eight of a chance of spinning a 7 or 1.part 2. a is false because the chance of spinning and odd is 50% and their is 3 numbers less than 4 .4 numbers would be a 50% chance to buts its not.b is true because he has a chance of spinning any number i think.c is true because there are 4 odd numers and 2 and 4 is half of 4

Step-by-step explanation:

Answer:

the final one

Step-by-step explanation:

to figure this equation out it is easier to add numbers to the angles

for 1 we can have it as 100 and for 2 we can have it as 80

that means 3 is 100 and 4 is 80

100 - 80 is also 100 - 80 so the first one can be proven

100 + 80 = 180 so the second one can be proven

80 = 80 so the third one can be proven

80 + 80 = 100 + 100 is not correct because it turns into 160 = 200 which is incorrect so the last one cannot be proven

Answer:

Step-by-step explanation:

By VOA theorem, vertically opposite angles are equal.

⇒ You can write : ∠1 + ∠2 = ∠3 + ∠4

⇒ or ∠4 - ∠1 = ∠3 - ∠2

⇒ The 4th option does not give it correctly