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2 years ago

Terri wants to learn about areas that could be volcanically active. Ernesto wants to learn about the history of rocks in

Chemistry

2 answers:

irinina [24]2 years ago

4 0

Terri and Ernesto should both use geographic maps.

may i have brainliest? :D

Brrunno [24]2 years ago

3 0

Answer:

Explanation:

I dunno. took the test and got it right.

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What does he want? change into passive

Marina CMI [18]

There’s no picture if you meant to add a picture

3 0

3 years ago

Maize, man, Goat, is an example of a food chain true or false

Lina20 [59]

Answer:

False

Explanation:

The correnct chain is labeled Maize, Goat, Man.

8 0

3 years ago

A scientist digs up sample of arctic ice that is 458,000 years old. He takes it to his lab and finds that it contains 1.675 gram

Fiesta28 [93]

Answer:

6.70 grams of krypton-81 was present when the ice first formed

Explanation:

Let use the below formula to find the amount of sample

$N= N_0(\frac{1}{2})^n$

where

$n = \frac{t}{t_{\frac{1}{2}}}$

here

t = 458,000 years

$t_{\frac{1}{2}}$ = 229,000

$\frac{t}{t_{\frac{1}{2}}}$ = \ $\frac{ 458,000}{229,000}$

n = $\frac{t}{t_{\frac{1}{2}}}$ = 2.000

Now substituting the values

$1.675 = N_0(\frac{1}{2})^{2.000}}$

$1.675 = N_0\times (0.2500)$

$N_0= \frac{1.675}{0.2500}$

$N_0=6.70$

3 0

3 years ago

you can work a total of no more than 20 hours per week at you two jobs. Baby-sitting pays $5 per hour,and your job as a cashier

Dovator [93]

Where x represents the number of hours working as a babysitter and y represents the number of hours working as a cashier...

5x + 6y < 90
x + y > 20

5 0

3 years ago

What is the volume, in liters, occupied by 0.485 moles of Oxygen gas at 23.0 oC and 0.980 atm?

____ [38]

Use the universal gas formula

PV=nRT
where
P=pressure ( 0.980 atm)
V=volume (L)
T=temperature ( 23 ° C = 23+273.15 = 296.15 ° K)
n=number of moles of ideal gas (0.485 mol)
R=universal gas constant = 0.08205 L atm / (mol·K)

Substitute values,
Volume, V (in litres)
=nRT/P
=0.485*0.08205*296.15/0.980
= 12.0256 L
= 12.0 L (to three significant figures)

Read more on Brainly.com - brainly.com/question/10606064#readmore

5 0

3 years ago