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3 years ago

Someone please help me I got a few minutes

Chemistry

2 answers:

HACTEHA [7]3 years ago

6 0

Answer:

30 feet /second

Explanation:

60 feet/ 2 sec = 30 feet/sec

valina [46]3 years ago

5 0

Answer:

30 feet/sec

Explanation:

Average speed = distance / time (distance divided by time)

Average speed = 60 feet / 2 seconds

Average speed = 30 feet/sec

So the anverage speed is 30 feet per second

HOPE IT HELPED

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Scientific notation of (4.5+ 17) x 104 -1.5 x 104

Naddik [55]

Answer:

4.5× 104 + 1.7× 105. Firstly, we need to ensure that both exponents have the same value. Thus, we need to change the value of 1.7 x 105 to 17 x 104. If both already had the same exponential value, you can neglect this step. 4.5× 104+ 17 × 104. Now, we will take exponentials common and add the decimal values. (4.5+ 17) × 104 | 21.5 × 104. Similar steps are taken for the subtraction phase we just need to retrace our steps and find differences rather than sums. These lessons and worksheets show you how to perform sums and differences with values that are in scientific notation.

Explanation:

I think it helps you

6 0

3 years ago

For the simple decomposition reactionAB(g)→ A(g) + B(g)Rate =k[AB]2 and k=0.2 L/mol*s . How long will it takefor [AB] to reach 1

mixer [17]

Answer:

6.66 s will it take for [AB] to reach 1/3 of its initial concentration 1.50 mol/L.

Explanation:

$Rate = k[AB]^2$

The order of the reaction is 2.

Integrated rate law for second order kinetic is:

$\frac{1}{[A_t]} = \frac{1}{[A]_0}+kt$

Where, $[A_0]$ is the initial concentration = 1.50 mol/L

$[A_t]$ is the final concentration = 1/3 of initial concentration = $\frac{1}{3}\times 1.50\ mol/L$ = 0.5 mol/L

Rate constant, k = 0.2 L/mol*s

Applying in the above equation as:-

$\frac{1}{0.5} = \frac{1}{1.50}+0.2t$

$\frac{1}{1.5}+0.2x=\frac{1}{0.5}$

$t = 6.66\ s$

<u>6.66 s will it take for [AB] to reach 1/3 of its initial concentration 1.50 mol/L.</u>

5 0

3 years ago

What is the density of a liquid if it has a mass of 12.9g ?

user100 [1]

Find it on google i’m pretty sure i saw it somewhere so sorry this doesn’t help

4 0

4 years ago

What is the mass of a rock if a 12 N unbalanced force acting on it causes the rock to accelerate at 4 m/s²?

almond37 [142]

Answer:

B. 3 kg

Explanation:

I just took the test! :)

8 0

4 years ago

How many mg of salt are in a 2.78 kg bag of salt?

igomit [66]

Answer:

2,780,000mg

Explanation:

Using the Metric Staircase photo provided, you can calculate how many mg there are in 2.78 kg by simply moving the decimal point six places to the right, since the "Kilo" step takes six places to move to the "Milli" step.

2.78 kg

---------------

2 7 8 0 0 0 0 .

we can see that the decimal point is moved to the right six places.

Answer:

2,780,000mg

7 0

3 years ago