All categories

3 years ago

How many grams are 7.00 x 1022 molecules of NaOH?

Mathematics

1 answer:

olya-2409 [2.1K]3 years ago

8 0

Answer:

46.5

explanation

6.022*10^23 molecules=40g.

7.00*10^23=40*7.00*10^23/6.022*10^23 g =46.5 g

You might be interested in

Hi! Please help me im really confused >.< tysm g² - 4g = -3

Sholpan [36]

Answer:

g = 1, 3

General Formulas and Concepts:

Pre-Algebra

Equality Properties

Algebra I

Terms/Coefficients
Factoring
Solving quadratics

Step-by-step explanation:

Step 1: Define

Identify

g² - 4g = -3

Step 2: Solve for g

[Addition Property of Equality] Add 3 on both sides: g² - 4g + 3 = 0
Factor: (g - 1)(g - 3) = 0
Solve: g = 1, 3

5 0

3 years ago

Find the exact value

ivann1987 [24]

Answer:

Step-by-step explanation:

$cos~ \theta=\sqrt{1-sin^2 \theta} =\sqrt{1-(\frac{1}{2})^2 } =\frac{\sqrt{3} }{2} \\1+cos~\theta=2cos^2\frac{\theta}{2} \\1+\frac{\sqrt{3}}{2} =2~cos^2 \frac{\theta}{2} \\cos^2\frac{\theta}{2} =\frac{2+\sqrt{3}}{2 \times 2} \\cos \frac{\theta}{2} =\frac{\sqrt{2+\sqrt{3}}}{2} \\1-cos \theta=2 ~sin^2\frac{\theta}{2} \\1-\frac{\sqrt{3}}{2}=2~sin^2 \frac{\theta}{2} \\sin^2 \frac{\theta}{2} =\frac{2-\sqrt{3} }{2 \times 2} \\sin \frac{\theta}{2}=\frac{\sqrt{2-\sqrt{3} } }{2}$

as 0≤θ≤90

so θ/2 is also in 0≤θ≤90

hence sin θ/2 and cos θ/2 are positive.

3 0

3 years ago

Patricia is studying a polynomial function f(x). Three given roots of f(x) are -11-√2i , 3 + 4i, and 10. Patricia concludes that

valina [46]

Answer:

just took the test, it is NOT c.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

For what value of \$x\$ is the function \$\\frac{1}{x-2}\$ not defined?

natima [27]

for the value of $x=2$ we have the function f(x) = 1/(x-2) or $f(x)=\frac{1}{x-2}$ as undefined or not defined .

Step-by-step explanation:

Function undefined: A function is undefined when it gives results which are not defined for example , infinity .

Here we have , Function f(x) = 1/(x-2) or $f(x)=\frac{1}{x-2}$ . We need to find a value of for which this is not defined . Let's find out:

We can clearly see that it's a fractional function with numerator as 1 and denominator as x-2 . For a fractional function to be undefined it's denominator must be zero i.e. x-2 = 0 or $x-2=0$

⇒ $x-2=0$

⇒ $x-2+2=0+2$

⇒ $x=2$

Therefore, for the value of $x=2$ we have the function f(x) = 1/(x-2) or $f(x)=\frac{1}{x-2}$ as undefined or not defined .

7 0

3 years ago

Solve the equation 6x + 3y = 15 for y. What does y equal if x = 2? If x = 5?

Colt1911 [192]

Part a. 6x +3y = 15
3y = 15 -6x
y = 5 - 2x

Part b. y = 1

Part c. y = -5

4 0

4 years ago