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3 years ago

I am a alkaline earth metal. A. Chromium B. Molybdenum C. Tungsten D. Seaborgium

Chemistry

2 answers:

riadik2000 [5.3K]3 years ago

6 0

C) Tungsten for sure

inn [45]3 years ago

5 0

Answer:

C. Tungsten

Explanation:

Earth metals are magnesium and beryllium. The other three, which include rubidium, tungsten and cesium.

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Llana [10]

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3 years ago

If my dog weighs 31.8 kilograms, how much would she weigh in ounces? Round your to the 1st decimal place.

lidiya [134]

Your dog would weigh 1121.7 ounces

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3 years ago

A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0°C. What will the volume o

Sholpan [36]

Answer:

$V_2=20.1L$

Explanation:

Hello there!

In this case, since this is a problem in which the pressure of the gas remains constant, we can use the Charles' law as a directly proportional relationship between temperature (in Kelvins) and volume given by:

$\frac{V_2}{T_2} =\frac{V_1}{T_1}$

Thus, solving for the final volume as the temperature is decreased to -80.00 °C, we obtain:

$V_2=\frac{V_1T_2}{T_1}$

$V_2=\frac{30.0L*(-80+273)K}{(15+273)K} \\\\V_2=20.1L$

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4 0

3 years ago

Let h(x)=2x+5h(x)=2x+5h, left parenthesis, x, right parenthesis, equals, 2, x, plus, 5 and g(x)=8-3xg(x)=8−3xg, left parenthesis

denpristay [2]

The given functions were

$h(x)=2x+5\: and\:g(x)=8-3x$

Before we can evaluate $h(g(1.5))$ we need to find an expression for $h(g(x))$ .

This is the composition of the two functions. $h(g(x))$ means $g(x)$ becomes an input for $h(x)$ . This means that;

$h(g(x))=h(8-3x)$

So we need to substitute, $8-3x$ wherever we see $x$ in $h(x)$

$\Rightarrow h(g(x))=2(8-3x)+5$

We expand the bracket to obtain;

$h(g(x))=2\times8-2\times3x+5$

Simplify to obtain;

$h(g(x))=16-6x+5$

$h(g(x))=21-6x$

Now we substittute $x=1.5$ in to $h(g(x))=21-6x$ to obtain,

$\Rightarrow h(g(1.5))=21-6(1.5)$

$\Rightarrow h(g(1.5))=21-9$

$\Rightarrow h(g(1.5))=12$

Hence, the value of $h(g(1.5))$ is $1.5$ .

4 0

3 years ago

Read 2 more answers

Compounds A and B are constitutional isomers (same molecular formula but

Naily [24]

Answer:

Trimethylacetaldehyde

Explanation:

For the unknow compound we have a molar mass of 86 g/mol. We have an even value for the mass, so the compound does not have nitrogen and we can have several posibilities:

A) $C_3H_2O_3$

B) $C_4H_6O_2$

C) $C_5H_1_0O$

D) $C_6H_1_4$

If we check the IR info a signal in 1730 cm-1 appears, this indicates that we have an oxo group (C=O). So, the D option can be discarded. The groups that can have the oxo group are: Carboxylic acids, Ketones and aldehydes.

We don have a signal in 3000 cm-1, so the carboxylic acid can be discarded. Now, is we check the info for the 1H NMR we only have 2 signals. If we only have 2 we will have a very symmetric compound.

By trial an error the find the compound Trimethylacetaldehyde (Figure 1).

3 0

3 years ago